增强条码元素和自由表格元素的渲染逻辑，支持更多条码格式和文本边框样式。新增条码渲染工具，优化打印预览窗口的打印机选择功能，提升用户体验和打印模板的灵活性。

yy-admin-master/YY.Admin.Services/Service/Print/NativePrintRenderService.cs

@@ -4,6 +4,8 @@ using System.Text.Json.Nodes;
 using System.Text.RegularExpressions;
 using System.Globalization;
 using QRCoder;
+using ZXing;
+using ZXing.Rendering;
 
 namespace YY.Admin.Services.Service.Print;
 
@@ -312,6 +314,11 @@ public static class NativePrintRenderService
 
     // ─── Barcode ────────────────────────────────────────────────────────────
 
+    /// <summary>
+    /// 使用 ZXing.Net 的 SVG 渲染器生成真实可扫码的 1D 条码，与 web 端 jsbarcode 输出的
+    /// SVG 行为一致（preserveAspectRatio="xMidYMid meet"，外层 CSS 100% 保比例铺满）。
+    /// 失败时回退到原占位 SVG，避免渲染流程中断。
+    /// </summary>
     private static string RenderBarcode(JsonNode el, JsonObject data, string posStyle, double w, double h,
         bool bandRepeat = false, double designY = 0, double pageHeightMm = 0, int totalPages = 1)
     {
@@ -321,12 +328,14 @@ public static class NativePrintRenderService
             value = ResolveField(data, bindField)?.ToString() ?? value;
         if (string.IsNullOrWhiteSpace(value)) return string.Empty;
 
-        var escapedVal = EscapeHtml(value);
-        var inner = $"<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"100%\" height=\"75%\">" +
-                    $"<rect width=\"100%\" height=\"100%\" fill=\"white\"/>" +
-                    $"<text x=\"50%\" y=\"50%\" font-size=\"8\" text-anchor=\"middle\" dominant-baseline=\"middle\" font-family=\"monospace\">{escapedVal}</text>" +
-                    $"</svg><span style=\"font-size:9px;font-family:monospace;\">{escapedVal}</span>";
-        var wrapStyle = "display:flex;flex-direction:column;align-items:center;justify-content:center;";
+        // 从元素配置取格式/显示文字开关；元素未设时按 Code128 + 显示文字默认
+        var format       = ParseBarcodeFormat(ReadAsString(el["format"]));
+        var displayValue = !string.Equals(ReadAsString(el["displayValue"], "true"), "false", StringComparison.OrdinalIgnoreCase);
+        var textAlign    = ReadAsString(el["textAlign"], "center")!;
+
+        var inner = BuildBarcodeSvgInner(value, format, displayValue, textAlign);
+
+        var wrapStyle = "display:flex;align-items:center;justify-content:center;overflow:hidden;";
 
         if (!bandRepeat || totalPages <= 1)
             return $"<div class=\"el\" style=\"{posStyle}{wrapStyle}\">{inner}</div>\n";
@@ -341,6 +350,230 @@ public static class NativePrintRenderService
         return sb.ToString();
     }
 
+    /// <summary>
+    /// 把模板元素上的 format 字符串映射到 ZXing 的 BarcodeFormat 枚举。
+    /// 覆盖 web 端设计器（jsbarcode）支持的全部码制；对 ZXing 不直接支持的子集
+    /// （CODE128 子集、MSI 变体、EAN-5/EAN-2、pharmacode）做最接近映射，避免渲染失败。
+    /// </summary>
+    private static BarcodeFormat ParseBarcodeFormat(string? fmt)
+    {
+        var key = (fmt ?? string.Empty).Trim().ToUpperInvariant().Replace("-", "_");
+        return key switch
+        {
+            // Code128 系列：ZXing 自动识别 A/B/C 编码集，统一映射到 CODE_128
+            ""           => BarcodeFormat.CODE_128,
+            "CODE128"    => BarcodeFormat.CODE_128,
+            "CODE_128"   => BarcodeFormat.CODE_128,
+            "CODE128A"   => BarcodeFormat.CODE_128,
+            "CODE128B"   => BarcodeFormat.CODE_128,
+            "CODE128C"   => BarcodeFormat.CODE_128,
+
+            // Code 39 / 93
+            "CODE39"     => BarcodeFormat.CODE_39,
+            "CODE_39"    => BarcodeFormat.CODE_39,
+            "CODE93"     => BarcodeFormat.CODE_93,
+            "CODE_93"    => BarcodeFormat.CODE_93,
+
+            // EAN / UPC
+            "EAN13"      => BarcodeFormat.EAN_13,
+            "EAN_13"     => BarcodeFormat.EAN_13,
+            "EAN8"       => BarcodeFormat.EAN_8,
+            "EAN_8"      => BarcodeFormat.EAN_8,
+            // EAN-5 / EAN-2 是 EAN-13 的附加码，ZXing 不直接支持；为避免渲染失败回退为 CODE_128
+            "EAN5"       => BarcodeFormat.CODE_128,
+            "EAN_5"      => BarcodeFormat.CODE_128,
+            "EAN2"       => BarcodeFormat.CODE_128,
+            "EAN_2"      => BarcodeFormat.CODE_128,
+            "UPC"        => BarcodeFormat.UPC_A,
+            "UPCA"       => BarcodeFormat.UPC_A,
+            "UPC_A"      => BarcodeFormat.UPC_A,
+            "UPCE"       => BarcodeFormat.UPC_E,
+            "UPC_E"      => BarcodeFormat.UPC_E,
+
+            // ITF / ITF-14
+            "ITF"        => BarcodeFormat.ITF,
+            "ITF14"      => BarcodeFormat.ITF,
+            "ITF_14"     => BarcodeFormat.ITF,
+
+            // MSI 全部变体：ZXing 不直接支持，回退到 CODE_128（保证至少能扫码识别值）
+            "MSI"        => BarcodeFormat.CODE_128,
+            "MSI10"      => BarcodeFormat.CODE_128,
+            "MSI11"      => BarcodeFormat.CODE_128,
+            "MSI1010"    => BarcodeFormat.CODE_128,
+            "MSI1110"    => BarcodeFormat.CODE_128,
+
+            // Pharmacode：ZXing 不支持，回退 CODE_128
+            "PHARMACODE" => BarcodeFormat.CODE_128,
+
+            // Codabar
+            "CODABAR"    => BarcodeFormat.CODABAR,
+
+            _            => BarcodeFormat.CODE_128,
+        };
+    }
+
+    /// <summary>
+    /// 把 ZXing 输出的 SVG 转换为"由外层 CSS 控制尺寸 + 保持原始条宽比例"的形式：
+    ///   1) 若原 SVG 无 viewBox，用原 width/height 派生（让 preserveAspectRatio 生效）；
+    ///   2) 删除根 svg 节点的 width/height 属性（移交给 CSS）；
+    ///   3) 强制 preserveAspectRatio="xMidYMid meet"（与 web 端 jsbarcode 一致）；
+    ///   4) 重新挂上 width="100%" height="100%"，确保 div 100% 铺满。
+    /// 防护层：若 ZXing 输出的 SVG 已带 viewBox，直接复用；否则从 width/height 推导。
+    /// </summary>
+    private static string? NormalizeBarcodeSvg(string svg)
+    {
+        if (string.IsNullOrWhiteSpace(svg)) return null;
+        return Regex.Replace(svg, @"<svg\b([^>]*)>", m =>
+        {
+            var attrs = m.Groups[1].Value;
+
+            // 取原 width/height 数值（若有），用于派生 viewBox
+            var widthMatch  = Regex.Match(attrs, @"\swidth\s*=\s*""([^""]+)""", RegexOptions.IgnoreCase);
+            var heightMatch = Regex.Match(attrs, @"\sheight\s*=\s*""([^""]+)""", RegexOptions.IgnoreCase);
+            var hasViewBox  = Regex.IsMatch(attrs, @"\sviewBox\s*=", RegexOptions.IgnoreCase);
+
+            if (!hasViewBox && widthMatch.Success && heightMatch.Success
+                && double.TryParse(Regex.Replace(widthMatch.Groups[1].Value, @"[^\d.]", ""),
+                       NumberStyles.Any, CultureInfo.InvariantCulture, out var w) && w > 0
+                && double.TryParse(Regex.Replace(heightMatch.Groups[1].Value, @"[^\d.]", ""),
+                       NumberStyles.Any, CultureInfo.InvariantCulture, out var h) && h > 0)
+            {
+                attrs += $" viewBox=\"0 0 {w.ToString("0.###", CultureInfo.InvariantCulture)} {h.ToString("0.###", CultureInfo.InvariantCulture)}\"";
+            }
+
+            attrs = Regex.Replace(attrs, @"\s(width|height)\s*=\s*""[^""]*""", string.Empty, RegexOptions.IgnoreCase);
+            if (!Regex.IsMatch(attrs, @"preserveAspectRatio", RegexOptions.IgnoreCase))
+                attrs += " preserveAspectRatio=\"xMidYMid meet\"";
+            return $"<svg width=\"100%\" height=\"100%\"{attrs}>";
+        }, RegexOptions.IgnoreCase);
+    }
+
+    /// <summary>条码生成失败时的占位 SVG，至少把原文字显示出来便于排查。</summary>
+    private static string BuildFallbackBarcodeSvg(string value)
+    {
+        var escapedVal = EscapeHtml(value);
+        return $"<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"100%\" height=\"100%\" preserveAspectRatio=\"xMidYMid meet\" viewBox=\"0 0 200 60\">" +
+               $"<rect width=\"200\" height=\"60\" fill=\"white\"/>" +
+               $"<text x=\"100\" y=\"35\" font-size=\"12\" text-anchor=\"middle\" font-family=\"monospace\">{escapedVal}</text>" +
+               $"</svg>";
+    }
+
+    /// <summary>
+    /// 表格单元格用：包装统一的 BuildBarcodeSvgInner，保持与独立 barcode 元素一致的视觉比例。
+    /// </summary>
+    private static string BuildBarcodeCellSvg(string value, string? format = null, bool displayValue = true, string? textAlign = null)
+        => BuildBarcodeSvgInner(value ?? string.Empty, ParseBarcodeFormat(format), displayValue, textAlign);
+
+    /// <summary>
+    /// 调用 ZXing.Net 生成条码 SVG 的统一入口：用与 web 端 jsbarcode 默认参数等价的比例
+    /// （lineWidth ≈ 2px/module、barHeight ≈ 60px、底部文字区 ≈ 18px）来派生 ZXing 的
+    /// Width/Height，使生成的 SVG 内部 viewBox 比例稳定（与 web 视觉风格对齐），不会随
+    /// 元素框形状（90×60 / 50×30 mm）漂移成 1.5:1。外层 div 用 100%+preserveAspectRatio
+    /// ="xMidYMid meet" 自适应铺满。
+    /// textAlign 控制底部文字对齐：center / left / right / justify（两端），通过 SVG
+    /// 后处理修改 ZXing 输出的 &lt;text&gt; 节点 x/text-anchor 实现，与 web 端逻辑同源。
+    /// </summary>
+    private static string BuildBarcodeSvgInner(string value, BarcodeFormat format, bool displayValue, string? textAlign = null)
+    {
+        if (string.IsNullOrWhiteSpace(value)) return string.Empty;
+        try
+        {
+            // moduleCount 仅用于派生稳定的 SVG viewBox 宽度，ZXing 实际按编码后的真实模块数
+            // 1:1 绘制；多给一点宽度不会让条变粗，只会让两侧留白略多。
+            var moduleCount = EstimateBarcodeModuleCount(value, format);
+            const int lineWidth   = 2;
+            const int barHeight   = 60;
+            var       fontFooter  = displayValue ? 18 : 0; // jsbarcode 默认 fontSize 14 + 上下 padding ≈ 18px
+            var       widthPx     = Math.Max(120, moduleCount * lineWidth);
+            var       heightPx    = barHeight + fontFooter;
+
+            var writer = new BarcodeWriterSvg
+            {
+                Format = format,
+                Options = new ZXing.Common.EncodingOptions
+                {
+                    Width        = widthPx,
+                    Height       = heightPx,
+                    Margin       = 0,
+                    PureBarcode  = !displayValue,
+                },
+            };
+            var svgStr = writer.Write(value)?.Content ?? string.Empty;
+            var normalized = NormalizeBarcodeSvg(svgStr) ?? BuildFallbackBarcodeSvg(value);
+            // 仅当显示文字时执行对齐后处理
+            if (displayValue) normalized = ApplyBarcodeTextAlign(normalized, textAlign);
+            return normalized;
+        }
+        catch
+        {
+            return BuildFallbackBarcodeSvg(value);
+        }
+    }
+
+    /// <summary>
+    /// 后处理 ZXing 输出 SVG 中的底部文字 &lt;text&gt; 节点，按 textAlign 修改 x/text-anchor，
+    /// justify（两端对齐）通过 textLength + lengthAdjust=spacing 让浏览器自动拉伸字符间距。
+    /// 宽度从 SVG 自身的 viewBox 第三个分量读取，不依赖 ZXing 的内部缩放策略，保证
+    /// "user units 坐标系内对齐 + 浏览器渲染" 一致。
+    /// </summary>
+    private static string ApplyBarcodeTextAlign(string svg, string? textAlign)
+    {
+        if (string.IsNullOrEmpty(svg)) return svg;
+        var align = (textAlign ?? "center").Trim().ToLowerInvariant();
+        if (align is not ("left" or "right" or "justify")) return svg; // center 即 ZXing 默认，不动
+
+        // 解析 viewBox 取 user units 宽度，作为对齐坐标参照
+        double vbWidth = 0;
+        var vbMatch = Regex.Match(svg, @"viewBox\s*=\s*""([^""]+)""", RegexOptions.IgnoreCase);
+        if (vbMatch.Success)
+        {
+            var parts = Regex.Split(vbMatch.Groups[1].Value.Trim(), @"[\s,]+");
+            if (parts.Length >= 4
+                && double.TryParse(parts[2], NumberStyles.Any, CultureInfo.InvariantCulture, out var w) && w > 0)
+            {
+                vbWidth = w;
+            }
+        }
+        if (vbWidth <= 0) return svg; // 拿不到 viewBox 宽度时不动，保持 ZXing 默认居中
+
+        return Regex.Replace(svg, @"<text\b([^>]*)>", m =>
+        {
+            var attrs = m.Groups[1].Value;
+            attrs = Regex.Replace(attrs, @"\s(x|text-anchor|textLength|lengthAdjust)\s*=\s*""[^""]*""", string.Empty, RegexOptions.IgnoreCase);
+            var widthStr = vbWidth.ToString("0.###", CultureInfo.InvariantCulture);
+
+            return align switch
+            {
+                "left"    => $"<text x=\"0\" text-anchor=\"start\"{attrs}>",
+                "right"   => $"<text x=\"{widthStr}\" text-anchor=\"end\"{attrs}>",
+                "justify" => $"<text x=\"0\" text-anchor=\"start\" textLength=\"{widthStr}\" lengthAdjust=\"spacing\"{attrs}>",
+                _          => m.Value,
+            };
+        }, RegexOptions.IgnoreCase);
+    }
+
+    /// <summary>
+    /// 估算 1D 条码所需的模块数（即最窄条单位个数），用于给 ZXing 提供合适的 Width，
+    /// 确保 SVG viewBox 比例稳定。各码制按字符 × 每字符模块数 + 起止/校验粗略估算。
+    /// </summary>
+    private static int EstimateBarcodeModuleCount(string value, BarcodeFormat format)
+    {
+        var n = Math.Max(1, value?.Length ?? 1);
+        return format switch
+        {
+            BarcodeFormat.CODE_128 => n * 11 + 35,
+            BarcodeFormat.CODE_39  => (n + 2) * 13,
+            BarcodeFormat.CODE_93  => (n + 4) * 9,
+            BarcodeFormat.EAN_13   => 95,
+            BarcodeFormat.UPC_A    => 95,
+            BarcodeFormat.EAN_8    => 67,
+            BarcodeFormat.UPC_E    => 51,
+            BarcodeFormat.ITF      => (n / 2 + 1) * 9 + 7,
+            BarcodeFormat.CODABAR  => (n + 2) * 10,
+            _                       => n * 11 + 35,
+        };
+    }
+
     // ─── Image ─────────────────────────────────────────────────────────────
 
     private static string RenderImage(JsonNode el, JsonObject data, string posStyle,
@@ -798,7 +1031,8 @@ public static class NativePrintRenderService
         {
             var ws = fillCell ? "100%" : $"{scale.ToString("0", CultureInfo.InvariantCulture)}%";
             var hs = fillCell ? "100%" : $"{Math.Max(20d, scale * 0.6d).ToString("0", CultureInfo.InvariantCulture)}%";
-            return $"<div style=\"display:flex;align-items:center;justify-content:center;border:1px dashed #999;width:{ws};height:{hs};margin:0 auto;font-family:monospace;\">{EscapeHtml(innerArg)}</div>";
+            var svg = BuildBarcodeCellSvg(innerArg);
+            return $"<div style=\"display:flex;align-items:center;justify-content:center;width:{ws};height:{hs};margin:0 auto;overflow:hidden;\">{svg}</div>";
         }
         return EscapeHtml(displayValue);
     }
@@ -1350,7 +1584,10 @@ public static class NativePrintRenderService
             catch { return EscapeHtml(value); }
         }
         if (t == "barcode")
-            return $"<div style=\"font-family:monospace;text-align:center;\">{EscapeHtml(value)}</div>";
+        {
+            var svg = BuildBarcodeCellSvg(value);
+            return $"<div style=\"display:flex;align-items:center;justify-content:center;width:100%;height:100%;overflow:hidden;\">{svg}</div>";
+        }
         if (t == "image")
             return $"<img src=\"{EscapeHtml(value)}\" style=\"display:block;margin:0 auto;max-width:100%;max-height:100%;object-fit:contain;\" />";
         return EscapeHtml(value);

yy-admin-master/YY.Admin.Services/Service/Print/PrintDotService.cs

@@ -90,10 +90,31 @@ public class PrintDotService : IPrintDotService
             var status = resDoc?["status"]?.GetValue<string>();
             if (status == null) continue;
             if (status == "success") return;
-            throw new InvalidOperationException(resDoc?["message"]?.GetValue<string>() ?? "PrintDot 打印失败");
+            var rawMsg = resDoc?["message"]?.GetValue<string>() ?? "PrintDot 打印失败";
+            throw new InvalidOperationException(EnhanceErrorMessage(rawMsg));
         }
     }
 
+    /// <summary>
+    /// 将 PrintDot 返回的部分英文错误转换为带本地处理步骤的中文提示。
+    /// 与 web 端 printDotBridge.ts::enhancePrintDotErrorMessage 行为一致，方便桌面端用户自助排查。
+    /// </summary>
+    private static string EnhanceErrorMessage(string raw)
+    {
+        var m = (raw ?? string.Empty).Trim();
+        // 缺 SumatraPDF：是 PrintDot 客户端最常见的初始化错误
+        if (System.Text.RegularExpressions.Regex.IsMatch(m, @"SumatraPDF\.exe not found", System.Text.RegularExpressions.RegexOptions.IgnoreCase)
+            || System.Text.RegularExpressions.Regex.IsMatch(m, "SUMATRAPDF_PATH", System.Text.RegularExpressions.RegexOptions.IgnoreCase))
+        {
+            return m + "。\n本地处理：PrintDot 依赖 SumatraPDF 静默打印 PDF。请安装 SumatraPDF 后任选其一：\n" +
+                   "① 将 SumatraPDF.exe 放在 PrintDot 客户端 exe 同目录；\n" +
+                   "② 或将 SumatraPDF 安装目录加入系统 PATH；\n" +
+                   "③ 或设置用户/系统环境变量 SUMATRAPDF_PATH 指向 SumatraPDF.exe 的完整路径；\n" +
+                   "然后重启 PrintDot 桥接器即可。";
+        }
+        return m;
+    }
+
     private static async Task<string> ReceiveTextAsync(ClientWebSocket ws, CancellationToken ct)
     {
         var buffer = new ArraySegment<byte>(new byte[64 * 1024]);

yy-admin-master/YY.Admin.Services/YY.Admin.Services.csproj

@@ -21,6 +21,8 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Http" Version="8.0.0" />
     <PackageReference Include="QRCoder" Version="1.6.0" />
+    <!-- 1D 条码渲染（与 web 端 jsbarcode 路径对齐：输出 SVG，由前端 CSS preserveAspectRatio 保比例显示） -->
+    <PackageReference Include="ZXing.Net" Version="0.16.9" />
   </ItemGroup>
 
   <ItemGroup>

yy-admin-master/YY.Admin/ViewModels/Print/PrintTemplateListViewModel.cs

@@ -14,6 +14,7 @@ namespace YY.Admin.ViewModels.Print;
 public class PrintTemplateListViewModel : BaseViewModel
 {
     private readonly IPrintTemplateService _printTemplateService;
+    private readonly IPrintDotService _printDotService;
     private readonly IEventAggregator _eventAggregator;
     private SubscriptionToken? _changeToken;
 
@@ -21,6 +22,32 @@ public class PrintTemplateListViewModel : BaseViewModel
 
     public ObservableCollection<PrintTemplate> Templates { get; } = new();
 
+    // ── PrintDot 打印机选择 ────────────────────────────────────────────────
+    public ObservableCollection<PrintDotPrinter> Printers { get; } = new();
+
+    private bool _suppressPrinterSave;
+    private PrintDotPrinter? _selectedPrinter;
+    public PrintDotPrinter? SelectedPrinter
+    {
+        get => _selectedPrinter;
+        set
+        {
+            if (!SetProperty(ref _selectedPrinter, value)) return;
+            if (_suppressPrinterSave) return;
+            // 持久化用户选择，预览窗口和后续会话使用
+            var s = PrintDotSettings.Load();
+            s.SelectedPrinter = value?.Name ?? string.Empty;
+            s.Save();
+        }
+    }
+
+    private string _printerStatus = string.Empty;
+    public string PrinterStatus
+    {
+        get => _printerStatus;
+        set => SetProperty(ref _printerStatus, value);
+    }
+
     private string _statusMessage = string.Empty;
     public string StatusMessage
     {
@@ -52,14 +79,17 @@ public class PrintTemplateListViewModel : BaseViewModel
     public DelegateCommand SearchCommand { get; }
     public DelegateCommand ResetCommand { get; }
     public DelegateCommand<PrintTemplate> PreviewCommand { get; }
+    public DelegateCommand RefreshPrintersCommand { get; }
 
     public PrintTemplateListViewModel(
         IPrintTemplateService printTemplateService,
+        IPrintDotService printDotService,
         IEventAggregator eventAggregator,
         IContainerExtension container,
         IRegionManager regionManager) : base(container, regionManager)
     {
         _printTemplateService = printTemplateService;
+        _printDotService = printDotService;
         _eventAggregator = eventAggregator;
 
         SearchCommand = new DelegateCommand(ApplyFilter);
@@ -71,6 +101,7 @@ public class PrintTemplateListViewModel : BaseViewModel
             FilterCategory = null;
             ApplyFilter();
         });
+        RefreshPrintersCommand = new DelegateCommand(async () => await RefreshPrintersAsync(verbose: true));
 
         _changeToken = _eventAggregator
             .GetEvent<PrintTemplateChangedEvent>()
@@ -79,6 +110,51 @@ public class PrintTemplateListViewModel : BaseViewModel
         // 先用缓存立即填充，再后台静默刷新
         ShowCached();
         _ = RefreshSilentlyAsync();
+
+        // 后台静默连接 PrintDot 桥接器，初次加载打印机
+        _ = RefreshPrintersAsync(verbose: false);
+    }
+
+    /// <summary>
+    /// 通过 PrintDot 桥接器拉取打印机列表，与后端 web 列表页的 fetchPrintDotPrinters 行为对齐。
+    /// </summary>
+    private async Task RefreshPrintersAsync(bool verbose)
+    {
+        if (verbose) PrinterStatus = "刷新打印机中...";
+        var savedName = PrintDotSettings.Load().SelectedPrinter;
+        try
+        {
+            var list = await _printDotService.GetPrintersAsync();
+            System.Windows.Application.Current.Dispatcher.Invoke(() =>
+            {
+                Printers.Clear();
+                foreach (var p in list) Printers.Add(p);
+
+                // 选中规则：上次保存 > 系统默认 > 首台
+                var match = list.FirstOrDefault(p => p.Name == savedName)
+                            ?? list.FirstOrDefault(p => p.IsDefault)
+                            ?? (list.Count > 0 ? list[0] : null);
+
+                _suppressPrinterSave = true;
+                SelectedPrinter = match;
+                _suppressPrinterSave = false;
+
+                PrinterStatus = list.Count > 0 ? $"共 {list.Count} 台打印机" : "未检测到打印机";
+            });
+        }
+        catch (Exception ex)
+        {
+            System.Windows.Application.Current.Dispatcher.Invoke(() =>
+            {
+                Printers.Clear();
+                _suppressPrinterSave = true;
+                SelectedPrinter = null;
+                _suppressPrinterSave = false;
+                PrinterStatus = verbose
+                    ? $"PrintDot 未连接：{ex.Message}"
+                    : "PrintDot 未连接";
+            });
+        }
     }
 
     private void ShowCached()
@@ -192,7 +268,7 @@ public class PrintTemplateListViewModel : BaseViewModel
             catch { /* 保持 json 为 null，预览窗口显示"尚未设计" */ }
         }
 
-        var win = new PrintPreviewWindow(template, json)
+        var win = new PrintPreviewWindow(template, json, _printDotService, SelectedPrinter?.Name)
         {
             Owner = Application.Current.MainWindow
         };

yy-admin-master/YY.Admin/Views/Print/PrintPreviewWindow.xaml

@@ -44,9 +44,29 @@
                             VerticalAlignment="Center">
                     <TextBlock x:Name="TbStatus"
                                FontSize="12" Foreground="#888888"
-                               VerticalAlignment="Center" Margin="0,0,16,0"/>
+                               VerticalAlignment="Center" Margin="0,0,12,0"
+                               MaxWidth="320"
+                               TextWrapping="NoWrap"
+                               TextTrimming="CharacterEllipsis"
+                               ToolTipService.ShowDuration="30000"/>
+                    <TextBlock Text="打印机：" VerticalAlignment="Center"
+                               FontSize="12" Foreground="#333333"/>
+                    <ComboBox x:Name="PrinterCombo"
+                              MinWidth="200" Height="30"
+                              VerticalContentAlignment="Center"
+                              DisplayMemberPath="Name"/>
+                    <Button x:Name="BtnRefreshPrinters"
+                            Content="刷新打印机"
+                            Click="RefreshPrinters_Click"
+                            Margin="6,0,0,0" Height="30" Padding="10,0" FontSize="12"
+                            Style="{StaticResource ButtonDefault}"/>
+                    <Button x:Name="BtnPrint"
+                            Content="打印"
+                            Click="Print_Click"
+                            Margin="12,0,0,0" Width="84" Height="30" FontSize="13"
+                            Style="{StaticResource ButtonPrimary}"/>
                     <Button Content="关闭" Click="CloseButton_Click"
-                            Width="72" Height="30" FontSize="13"
+                            Margin="8,0,0,0" Width="72" Height="30" FontSize="13"
                             Style="{StaticResource ButtonDefault}"/>
                 </StackPanel>
             </Grid>

yy-admin-master/YY.Admin/Views/Print/PrintPreviewWindow.xaml.cs

@@ -1,8 +1,11 @@
+using System.Globalization;
+using System.IO;
 using System.Text.Json;
 using System.Text.Json.Nodes;
 using System.Text.RegularExpressions;
 using System.Windows;
 using YY.Admin.Core.Entity;
+using YY.Admin.Core.Services;
 using YY.Admin.Services.Service.Print;
 
 namespace YY.Admin.Views.Print;
@@ -10,11 +13,23 @@ namespace YY.Admin.Views.Print;
 public partial class PrintPreviewWindow : HandyControl.Controls.Window
 {
     private readonly string _templateJson;
+    private readonly PrintTemplate _template;
+    private readonly IPrintDotService? _printDotService;
+    private readonly string? _initialPrinterName;
 
     public PrintPreviewWindow(PrintTemplate template, string? templateJson)
+        : this(template, templateJson, null, null)
+    {
+    }
+
+    public PrintPreviewWindow(PrintTemplate template, string? templateJson,
+        IPrintDotService? printDotService, string? selectedPrinterName)
     {
         InitializeComponent();
+        _template = template;
         _templateJson = templateJson ?? string.Empty;
+        _printDotService = printDotService;
+        _initialPrinterName = selectedPrinterName;
 
         TbTemplateName.Text = template.TemplateName ?? "（未命名）";
         TbTemplateCode.Text = $"编码：{template.TemplateCode}  " +
@@ -23,20 +38,32 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
 
         TbParamJson.Text = BuildMockParamJson(_templateJson);
 
-        Loaded += async (_, _) => await LoadPreviewAsync();
+        // 没有 PrintDot 服务时禁用打印相关按钮
+        if (_printDotService == null)
+        {
+            BtnPrint.IsEnabled = false;
+            BtnRefreshPrinters.IsEnabled = false;
+            PrinterCombo.IsEnabled = false;
+        }
+
+        Loaded += async (_, _) =>
+        {
+            await LoadPreviewAsync();
+            await LoadPrintersAsync(verbose: false);
+        };
     }
 
     private async Task LoadPreviewAsync()
     {
         try
         {
-            TbStatus.Text = "加载中…";
+            SetStatus("加载中…");
             await WebView.EnsureCoreWebView2Async();
 
             if (string.IsNullOrWhiteSpace(_templateJson) || _templateJson == "{}")
             {
                 WebView.NavigateToString(BuildEmptyHtml());
-                TbStatus.Text = "尚未设计模板内容";
+                SetStatus("尚未设计模板内容");
                 return;
             }
 
@@ -44,7 +71,7 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
         }
         catch (Exception ex)
         {
-            TbStatus.Text = $"预览失败：{ex.Message}";
+            SetStatus($"预览失败：{ex.Message}");
         }
     }
 
@@ -75,7 +102,7 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
     {
         try
         {
-            TbStatus.Text = "渲染中…";
+            SetStatus("渲染中…");
 
             JsonObject dataObj;
             var text = TbParamJson.Text?.Trim();
@@ -89,7 +116,7 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
                 if (node is not JsonObject obj)
                 {
                     WebView.NavigateToString(BuildErrorHtml("参数JSON必须是对象（JSON Object）"));
-                    TbStatus.Text = "参数JSON格式错误";
+                    SetStatus("参数JSON格式错误");
                     return;
                 }
                 dataObj = obj;
@@ -97,12 +124,12 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
 
             var html = NativePrintRenderService.RenderToHtml(_templateJson, dataObj);
             WebView.NavigateToString(html);
-            TbStatus.Text = string.Empty;
+            SetStatus(string.Empty);
         }
         catch (Exception ex)
         {
             WebView.NavigateToString(BuildErrorHtml(ex.Message));
-            TbStatus.Text = $"渲染失败：{ex.Message}";
+            SetStatus($"渲染失败：{ex.Message}");
         }
         await Task.CompletedTask;
     }
@@ -192,8 +219,8 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
                                 {
                                     "number" => (i + 1) * 123.45,
                                     "amount" => (i + 1) * 24567.89,
-                                    "qrcode" => $"QR_{field}_{i + 1}",
-                                    "barcode" => $"BAR_{field}_{i + 1}",
+                                    "qrcode" => BuildQrcodeMockValue(field, rng),
+                                    "barcode" => BuildBarcodeMockValue(field, rng),
                                     "image" => $"https://picsum.photos/seed/{Uri.EscapeDataString(field + "_" + (i + 1))}/260/120",
                                     _ => $"{field}_示例值_{i + 1}"
                                 };
@@ -209,6 +236,30 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
                 if (!string.IsNullOrWhiteSpace(bind))
                     fields.Add(bind);
 
+                // 针对单一元素按 type 提前预填合法 mock 值，避免下面兜底成"字段_示例值"
+                // （barcode 含中文会导致 Code128 编码失败）。与 web 端 nativeMockData.ts 行为对齐。
+                if (!string.IsNullOrWhiteSpace(bind) && !obj.ContainsKey(bind))
+                {
+                    switch (type)
+                    {
+                        case "barcode":
+                            obj[bind] = BuildBarcodeMockValue(bind, rng);
+                            break;
+                        case "qrcode":
+                            obj[bind] = BuildQrcodeMockValue(bind, rng);
+                            break;
+                        case "image":
+                            obj[bind] = $"https://picsum.photos/seed/{Uri.EscapeDataString(bind)}/260/120";
+                            break;
+                        case "date":
+                            obj[bind] = "2026-01-01";
+                            break;
+                    }
+                }
+
+                // freeTable / 其它含 cells 的元素：根据 cell.contentType 预填合法 mock 值
+                CollectCellsMock(el["cells"], obj, fields, rng);
+
                 // 提取 text 中的 {{field}} 占位符（支持内嵌）
                 var text = el["text"]?.ToString() ?? string.Empty;
                 foreach (Match m in Regex.Matches(text, @"\{\{\s*([\w\.]+)\s*\}\}"))
@@ -217,8 +268,6 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
                     if (!string.IsNullOrWhiteSpace(key))
                         fields.Add(key);
                 }
-
-                CollectBindFields(el["cells"], fields);
             }
 
             foreach (var f in fields.OrderBy(x => x, StringComparer.OrdinalIgnoreCase))
@@ -237,6 +286,71 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
         }
     }
 
+    /// <summary>
+    /// 生成一个 ASCII 安全、Code128 可编码的条码 mock 值：BAR + 12 位数字 + 字段名前 6 位转大写字母。
+    /// 与 web 端 nativeMockData.ts::buildBarcodeValue 同款规则。
+    /// </summary>
+    private static string BuildBarcodeMockValue(string field, Random rng)
+    {
+        var digits = rng.NextInt64(100000000000L, 999999999999L).ToString(CultureInfo.InvariantCulture);
+        var suffix = new string((field ?? string.Empty)
+            .Where(c => (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9'))
+            .Take(6).ToArray()).ToUpperInvariant();
+        if (string.IsNullOrEmpty(suffix)) suffix = "BARCOD";
+        return $"BAR{digits}{suffix}";
+    }
+
+    /// <summary>生成 QR mock 值：纯 ASCII，便于 QRCoder 编码与人眼区分字段。</summary>
+    private static string BuildQrcodeMockValue(string field, Random rng)
+    {
+        var safe = new string((field ?? string.Empty)
+            .Where(c => (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '_')
+            .ToArray());
+        if (string.IsNullOrEmpty(safe)) safe = "QR";
+        return $"QR_{safe}_{rng.Next(100000, 999999)}";
+    }
+
+    /// <summary>
+    /// 递归扫描 cells 节点（freeTable、嵌套结构），按每个 cell 的 contentType 提前预填合法 mock 值。
+    /// 不识别的 cell 继续走原来的 fields 兜底流程。
+    /// </summary>
+    private static void CollectCellsMock(JsonNode? node, JsonObject obj, ISet<string> fields, Random rng)
+    {
+        if (node == null) return;
+        if (node is JsonObject o)
+        {
+            var bind = (o["bindField"]?.ToString() ?? string.Empty).Trim();
+            if (!string.IsNullOrWhiteSpace(bind))
+            {
+                fields.Add(bind);
+                if (!obj.ContainsKey(bind))
+                {
+                    var ct = (o["contentType"]?.ToString() ?? "text").Trim().ToLowerInvariant();
+                    switch (ct)
+                    {
+                        case "barcode":
+                            obj[bind] = BuildBarcodeMockValue(bind, rng);
+                            break;
+                        case "qrcode":
+                            obj[bind] = BuildQrcodeMockValue(bind, rng);
+                            break;
+                        case "image":
+                            obj[bind] = $"https://picsum.photos/seed/{Uri.EscapeDataString(bind)}/260/120";
+                            break;
+                    }
+                }
+            }
+            foreach (var kv in o)
+                CollectCellsMock(kv.Value, obj, fields, rng);
+            return;
+        }
+        if (node is JsonArray arr)
+        {
+            foreach (var it in arr)
+                CollectCellsMock(it, obj, fields, rng);
+        }
+    }
+
     private static void CollectBindFields(JsonNode? node, ISet<string> fields)
     {
         if (node == null) return;
@@ -285,4 +399,134 @@ public partial class PrintPreviewWindow : HandyControl.Controls.Window
     }
 
     private void CloseButton_Click(object sender, RoutedEventArgs e) => Close();
+
+    /// <summary>
+    /// 设置顶部状态栏文字：单行显示首行概要，完整多行内容通过 ToolTip 兜底，避免把工具栏撑高。
+    /// </summary>
+    private void SetStatus(string? message)
+    {
+        var full = (message ?? string.Empty).Trim();
+        var firstLine = full.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries).FirstOrDefault() ?? string.Empty;
+        TbStatus.Text = firstLine;
+        TbStatus.ToolTip = full.Contains('\n') || full.Length > firstLine.Length ? full : null;
+    }
+
+    // ── 打印机列表加载（PrintDot 桥接器） ────────────────────────────────
+
+    /// <summary>
+    /// 通过 PrintDot 桥接器拉取打印机列表，填充顶部下拉框，并按上次选择/系统默认/首台优先选中。
+    /// </summary>
+    private async Task LoadPrintersAsync(bool verbose)
+    {
+        if (_printDotService == null) return;
+
+        try
+        {
+            if (verbose) SetStatus("刷新打印机中...");
+            var list = await _printDotService.GetPrintersAsync();
+            PrinterCombo.ItemsSource = list;
+
+            var preferName = _initialPrinterName
+                ?? PrintDotSettings.Load().SelectedPrinter;
+            var match = list.FirstOrDefault(p => p.Name == preferName)
+                        ?? list.FirstOrDefault(p => p.IsDefault)
+                        ?? list.FirstOrDefault();
+            PrinterCombo.SelectedItem = match;
+
+            SetStatus(list.Count > 0
+                ? $"已发现 {list.Count} 台打印机"
+                : "未检测到打印机");
+        }
+        catch (Exception ex)
+        {
+            PrinterCombo.ItemsSource = null;
+            SetStatus($"PrintDot 未连接：{ex.Message}");
+        }
+    }
+
+    private async void RefreshPrinters_Click(object sender, RoutedEventArgs e)
+    {
+        await LoadPrintersAsync(verbose: true);
+    }
+
+    /// <summary>
+    /// 打印流程：
+    /// 1) 用 WebView2.PrintToPdfAsync 按模板纸张尺寸生成 PDF（与 @page 一致，零边距）；
+    /// 2) 读取 PDF → Base64；
+    /// 3) 通过 PrintDot 桥接器发送至本地物理打印机。
+    /// 与后端 web 端 printNativeSchemaViaPrintDot 的行为基本一致，只是 HTML→PDF 改用 WebView2 内置能力，
+    /// 比 html2canvas + jsPDF 更接近浏览器原生打印效果。
+    /// </summary>
+    private async void Print_Click(object sender, RoutedEventArgs e)
+    {
+        if (_printDotService == null)
+        {
+            HandyControl.Controls.Growl.Warning("PrintDot 服务不可用");
+            return;
+        }
+
+        if (string.IsNullOrWhiteSpace(_templateJson) || _templateJson == "{}")
+        {
+            HandyControl.Controls.Growl.Warning("当前模板没有可打印内容");
+            return;
+        }
+
+        var selected = PrinterCombo.SelectedItem as PrintDotPrinter;
+        if (selected == null || string.IsNullOrWhiteSpace(selected.Name))
+        {
+            HandyControl.Controls.Growl.Warning("请先选择打印机");
+            return;
+        }
+
+        BtnPrint.IsEnabled = false;
+        var pdfPath = Path.Combine(Path.GetTempPath(), $"qhmes_print_{Guid.NewGuid():N}.pdf");
+        try
+        {
+            // 1) 生成 PDF
+            SetStatus("正在生成 PDF...");
+            await WebView.EnsureCoreWebView2Async();
+
+            var pageW = (_template.PaperWidthMm ?? 210);
+            var pageH = (_template.PaperHeightMm ?? 297);
+            var settings = WebView.CoreWebView2.Environment.CreatePrintSettings();
+            settings.PageWidth = pageW / 25.4d;   // 毫米转英寸
+            settings.PageHeight = pageH / 25.4d;
+            settings.MarginTop = 0;
+            settings.MarginBottom = 0;
+            settings.MarginLeft = 0;
+            settings.MarginRight = 0;
+            settings.ShouldPrintBackgrounds = true;
+            settings.ShouldPrintHeaderAndFooter = false;
+            settings.Orientation = string.Equals(_template.PaperOrientation, "横向", StringComparison.Ordinal)
+                ? Microsoft.Web.WebView2.Core.CoreWebView2PrintOrientation.Landscape
+                : Microsoft.Web.WebView2.Core.CoreWebView2PrintOrientation.Portrait;
+
+            var ok = await WebView.CoreWebView2.PrintToPdfAsync(pdfPath, settings);
+            if (!ok || !File.Exists(pdfPath))
+                throw new InvalidOperationException("生成 PDF 失败，请确认预览已加载完成");
+
+            // 2) 读取为 Base64
+            var pdfBytes = await File.ReadAllBytesAsync(pdfPath);
+            var pdfBase64 = Convert.ToBase64String(pdfBytes);
+
+            // 3) 通过 PrintDot 桥接器发送
+            SetStatus($"正在通过 PrintDot 发送到「{selected.Name}」...");
+            var jobName = string.IsNullOrWhiteSpace(_template.TemplateName) ? "QH-MES" : _template.TemplateName!;
+            await _printDotService.PrintAsync(selected.Name, pdfBase64, jobName, copies: 1);
+
+            SetStatus("打印任务已发送");
+            HandyControl.Controls.Growl.Success("打印任务已发送至 PrintDot");
+        }
+        catch (Exception ex)
+        {
+            // 顶部状态栏单行显示首行，完整多行处理步骤在 Growl 弹窗中展示
+            SetStatus($"打印失败：{ex.Message}");
+            HandyControl.Controls.Growl.Error($"打印失败：{ex.Message}");
+        }
+        finally
+        {
+            try { if (File.Exists(pdfPath)) File.Delete(pdfPath); } catch { /* 忽略清理失败 */ }
+            BtnPrint.IsEnabled = true;
+        }
+    }
 }

yy-admin-master/YY.Admin/Views/Print/PrintTemplateListView.xaml

@@ -52,20 +52,54 @@
 
         <!-- 操作工具栏 -->
         <Border Grid.Row="1" Margin="0,10">
-            <hc:UniformSpacingPanel Spacing="10">
-                <Button Style="{StaticResource ButtonPrimary}" Command="{Binding SearchCommand}">
-                    <StackPanel Orientation="Horizontal">
-                        <md:PackIcon Kind="Search"/>
-                        <TextBlock Text="搜索" Style="{StaticResource IconButtonStyle}"/>
-                    </StackPanel>
-                </Button>
-                <Button Style="{StaticResource ButtonDefault}" Command="{Binding ResetCommand}">
-                    <StackPanel Orientation="Horizontal">
-                        <md:PackIcon Kind="Refresh"/>
-                        <TextBlock Text="重置" Style="{StaticResource IconButtonStyle}"/>
-                    </StackPanel>
-                </Button>
-            </hc:UniformSpacingPanel>
+            <Grid>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto"/>
+                    <ColumnDefinition Width="*"/>
+                    <ColumnDefinition Width="Auto"/>
+                </Grid.ColumnDefinitions>
+
+                <hc:UniformSpacingPanel Grid.Column="0" Spacing="10" VerticalAlignment="Center">
+                    <Button Style="{StaticResource ButtonPrimary}" Command="{Binding SearchCommand}">
+                        <StackPanel Orientation="Horizontal">
+                            <md:PackIcon Kind="Search"/>
+                            <TextBlock Text="搜索" Style="{StaticResource IconButtonStyle}"/>
+                        </StackPanel>
+                    </Button>
+                    <Button Style="{StaticResource ButtonDefault}" Command="{Binding ResetCommand}">
+                        <StackPanel Orientation="Horizontal">
+                            <md:PackIcon Kind="Refresh"/>
+                            <TextBlock Text="重置" Style="{StaticResource IconButtonStyle}"/>
+                        </StackPanel>
+                    </Button>
+                </hc:UniformSpacingPanel>
+
+                <!-- PrintDot 打印机选择（与后端列表页对齐） -->
+                <StackPanel Grid.Column="2" Orientation="Horizontal" VerticalAlignment="Center">
+                    <TextBlock Text="打印机：" VerticalAlignment="Center"
+                               FontSize="13" Foreground="#333333"/>
+                    <ComboBox ItemsSource="{Binding Printers}"
+                              SelectedItem="{Binding SelectedPrinter}"
+                              DisplayMemberPath="Name"
+                              MinWidth="220" Height="30"
+                              VerticalContentAlignment="Center"
+                              hc:InfoElement.Placeholder="请选择打印机"/>
+                    <Button Command="{Binding RefreshPrintersCommand}"
+                            Height="30" Padding="10,0" Margin="8,0,0,0"
+                            FontSize="12"
+                            Style="{StaticResource ButtonDefault}">
+                        <StackPanel Orientation="Horizontal">
+                            <md:PackIcon Kind="Refresh" VerticalAlignment="Center"/>
+                            <TextBlock Text="刷新打印机" Margin="4,0,0,0" VerticalAlignment="Center"/>
+                        </StackPanel>
+                    </Button>
+                    <TextBlock Text="{Binding PrinterStatus}"
+                               Margin="12,0,0,0"
+                               VerticalAlignment="Center"
+                               FontSize="12"
+                               Foreground="{DynamicResource SecondaryTextBrush}"/>
+                </StackPanel>
+            </Grid>
         </Border>
 
         <!-- 数据表格 -->