\n");
// 按 zIndex 升序渲染（低 zIndex 先画，高 zIndex 覆盖在上层）
var sortedElements = elements.OfType()
.OrderBy(el => el?["zIndex"]?.GetValue() ?? 0)
.ToList();
foreach (var el in sortedElements)
{
if (el == null) continue;
var elHtml = RenderElement(el, data, widthMm, heightMm, pageCount, mt, mb, elements,
repeatHeaderByPage, headerBandHeight, reportHeaderId, headerVisible);
if (!string.IsNullOrEmpty(elHtml))
sb.Append(elHtml);
}
for (var i = 1; i < pageCount; i++)
{
var sepTop = (i * heightMm).ToString("0.###", CultureInfo.InvariantCulture);
sb.Append($"\n");
sb.Append($"\n");
}
sb.Append("
\n");
return sb.ToString();
}
// ─── 元素渲染分发 ──────────────────────────────────────────────────────
private static string RenderElement(
JsonNode el, JsonObject data,
double pageWidthMm, double pageHeightMm, int totalPages,
double marginTopMm, double marginBottomMm, JsonArray allElements,
bool repeatHeaderByPage = false, double headerBandHeight = 0d,
string reportHeaderId = "", bool headerVisible = true)
{
// visible=false 的元素跳过（与前端一致）
if (string.Equals(ReadAsString(el["visible"]), "false", StringComparison.OrdinalIgnoreCase))
return string.Empty;
var type = ReadAsString(el["type"], "text");
var x = el["x"]?.GetValue{EscapeHtml(text)}
\n";
}
var baseStyle = RemoveCssProperty(posStyle, "top");
var sb = new StringBuilder();
for (var p = 1; p <= totalPages; p++)
{
var top = designY + (p - 1) * pageHeightMm;
var textPerPage = ReplaceTemplatePlaceholders(text, data, p, totalPages);
sb.Append($"{EscapeHtml(textPerPage)}
\n");
}
return sb.ToString();
}
// ─── QR Code ────────────────────────────────────────────────────────────
private static string RenderQrCode(JsonNode el, JsonObject data, string posStyle, double w, double h,
bool bandRepeat = false, double designY = 0, double pageHeightMm = 0, int totalPages = 1)
{
var bindField = ReadAsString(el["bindField"]);
var value = ReadAsString(el["value"], string.Empty);
if (bindField != null)
value = ResolveField(data, bindField)?.ToString() ?? value;
if (string.IsNullOrWhiteSpace(value)) return string.Empty;
string inner;
try
{
using var gen = new QRCodeGenerator();
var qrData = gen.CreateQrCode(value, QRCodeGenerator.ECCLevel.M);
using var code = new PngByteQRCode(qrData);
var b64 = Convert.ToBase64String(code.GetGraphic(6));
inner = $"{inner}
\n";
var baseNoTop = RemoveCssProperty(posStyle, "top");
var sb = new StringBuilder();
for (var p = 0; p < totalPages; p++)
{
var top = designY + p * pageHeightMm;
sb.Append($"{inner}
\n");
}
return sb.ToString();
}
// ─── Barcode ────────────────────────────────────────────────────────────
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)
{
var bindField = ReadAsString(el["bindField"]);
var value = ReadAsString(el["value"], string.Empty);
if (bindField != null)
value = ResolveField(data, bindField)?.ToString() ?? value;
if (string.IsNullOrWhiteSpace(value)) return string.Empty;
var escapedVal = EscapeHtml(value);
var inner = $"{escapedVal}";
var wrapStyle = "display:flex;flex-direction:column;align-items:center;justify-content:center;";
if (!bandRepeat || totalPages <= 1)
return $"{inner}
\n";
var baseNoTop = RemoveCssProperty(posStyle, "top");
var sb = new StringBuilder();
for (var p = 0; p < totalPages; p++)
{
var top = designY + p * pageHeightMm;
sb.Append($"{inner}
\n");
}
return sb.ToString();
}
// ─── Image ─────────────────────────────────────────────────────────────
private static string RenderImage(JsonNode el, JsonObject data, string posStyle,
bool bandRepeat = false, double designY = 0, double pageHeightMm = 0, int totalPages = 1)
{
var bindField = ReadAsString(el["bindField"]);
var src = ReadAsString(el["src"], string.Empty);
if (bindField != null)
src = ResolveField(data, bindField)?.ToString() ?? src;
var fit = ReadAsString(el["fit"], "contain");
var objFit = fit switch { "fill" => "fill", "cover" => "cover", _ => "contain" };
var inner = $"{inner}
\n";
var baseNoTop = RemoveCssProperty(posStyle, "top");
var sb = new StringBuilder();
for (var p = 0; p < totalPages; p++)
{
var top = designY + p * pageHeightMm;
sb.Append($"{inner}
\n");
}
return sb.ToString();
}
// ─── FreeTable ──────────────────────────────────────────────────────────
// printRepeated=true 或 bandRepeat=true 时在每页重复；否则仅在第1页显示
private static string RenderFreeTable(JsonNode el, JsonObject data, string posStyle, double wMm, double hMm,
double designY, int totalPages, double pageHeightMm, bool bandRepeat = false)
{
var innerHtml = BuildFreeTableInnerHtml(el, data, wMm, hMm);
var printRepeat = string.Equals(ReadAsString(el["printRepeated"]), "true", StringComparison.OrdinalIgnoreCase);
var repeat = (printRepeat || bandRepeat) && totalPages > 1;
var baseNoTop = RemoveCssProperty(RemoveCssProperty(posStyle, "height"), "top");
if (!repeat)
return $"{innerHtml}
\n";
var sb = new StringBuilder();
for (var p = 0; p < totalPages; p++)
{
var top = designY + p * pageHeightMm;
sb.Append($"{innerHtml}
\n");
}
return sb.ToString();
}
private static string BuildFreeTableInnerHtml(JsonNode el, JsonObject data, double wMm, double hMm)
{
var rowCount = el["rowCount"]?.GetValue");
sb.Append("");
if (showHeader)
{
var headerRows = BuildTableHeaderRows(el, columns.OfType
");
}
return sb.ToString();
}
// ─── 行合并 ────────────────────────────────────────────────────────────
/// {EscapeHtml(value)}
";
if (t == "image")
return $"