feat(order): 优化标准模板 Excel 生成并支持保存映射时选择标准模板

标准模板仅保留中文表头、必填标黄与枚举下拉；导入起始行改为第2行；保存自定义映射时可指定 standardTemplateKey。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Oms.Application/Dtos/Orders/OrderTemplateMappingDtos.cs

@@ -86,6 +86,8 @@ public class OrderTemplateSaveMappingInput
 {
     public int TemplateId { get; set; }
 
+    public string? StandardTemplateKey { get; set; }
+
     public int HeaderRowIndex { get; set; } = 1;
 
     public int DataStartRowIndex { get; set; } = 2;

src/Oms.Application/Oms.Application.csproj

@@ -21,6 +21,7 @@
     <PackageReference Include="Fake.ObjectMapping.AutoMapper" Version="$(FakePackageVersion)" />
     <PackageReference Include="Fake.Rbac.Application" Version="$(FakePackageVersion)" />
     <PackageReference Include="Fake.Rbac.Infrastructure" Version="$(FakePackageVersion)" />
+    <PackageReference Include="DocumentFormat.OpenXml" Version="3.0.2" />
     <PackageReference Include="MiniExcel" Version="1.43.1" />
     <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
   </ItemGroup>

src/Oms.Application/Services/Orders/OrderService.Template.cs

@@ -149,7 +149,10 @@ public partial class OrderService
             throw new BusinessException("模板表头为空，请重新上传样例文件");
         }
 
-        var standardKey = template.StandardTemplateKey ?? OrderTemplateKeys.DedicatedSmallParcel;
+        var standardKey = !string.IsNullOrWhiteSpace(input.StandardTemplateKey)
+            ? input.StandardTemplateKey.Trim()
+            : template.StandardTemplateKey ?? OrderTemplateKeys.DedicatedSmallParcel;
+        template.StandardTemplateKey = standardKey;
         var headerSet = sourceHeaders.ToHashSet(StringComparer.OrdinalIgnoreCase);
         var usedColumns = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
         var mappings = new List<OrderTemplateColumnMappingItem>();

src/Oms.Application/Services/Orders/Templates/OrderTemplateColumnMappingModels.cs

@@ -11,7 +11,7 @@ public class OrderTemplateColumnMappingDocument
 
     public int HeaderRowIndex { get; set; } = 1;
 
-    public int DataStartRowIndex { get; set; } = 4;
+    public int DataStartRowIndex { get; set; } = 2;
 
     public List<OrderTemplateColumnMappingItem> Mappings { get; set; } = [];
 

src/Oms.Application/Services/Orders/Templates/OrderTemplateExcelGenerator.cs

@@ -8,8 +8,8 @@ namespace Oms.Application.Services.Orders.Templates;
 public static class OrderTemplateExcelGenerator
 {
     public const string DataSheetName = "下单数据";
-    private const string GuideSheetName = "字段说明";
+    public const string GuideSheetName = "字段说明";
-    private const string DictSheetName = "下拉选项";
+    public const string DictSheetName = "下拉选项";
 
     public static async Task<byte[]> BuildStandardTemplateAsync(
         string templateKey,
@@ -17,21 +17,13 @@ public static class OrderTemplateExcelGenerator
         IReadOnlyList<OrderTemplateDictOption>? dictOptions = null)
     {
         var fields = OrderTemplateFieldRegistry.GetFields(templateKey);
-        var overrides = exampleOverrides ?? new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        _ = exampleOverrides;
 
-        var requiredRow = new Dictionary<string, object?>(StringComparer.Ordinal);
+        // 仅生成中文表头行（MiniExcel 第一行表头 + 第二行留空供用户填写）
-        var exampleRow = new Dictionary<string, object?>(StringComparer.Ordinal);
+        var emptyDataRow = new Dictionary<string, object?>(StringComparer.Ordinal);
         foreach (var field in fields)
         {
-            requiredRow[field.Label] = field.Required ? "*" : string.Empty;
+            emptyDataRow[field.Label] = string.Empty;
-            if (overrides.TryGetValue(field.FieldKey, out var overrideExample) && !string.IsNullOrWhiteSpace(overrideExample))
-            {
-                exampleRow[field.Label] = overrideExample;
-            }
-            else
-            {
-                exampleRow[field.Label] = string.IsNullOrWhiteSpace(field.Example) ? string.Empty : field.Example;
-            }
         }
 
         var guideRows = fields.Select(f => new Dictionary<string, object?>
@@ -41,6 +33,7 @@ public static class OrderTemplateExcelGenerator
             ["是否必填"] = f.Required ? "是" : "否",
             ["数据类型"] = f.DataType,
             ["字典类型"] = f.DictType ?? string.Empty,
+            ["可选值"] = BuildGuideOptionText(f, dictOptions ?? []),
             ["分组"] = f.Group,
             ["示例"] = f.Example
         }).ToList();
@@ -66,13 +59,36 @@ public static class OrderTemplateExcelGenerator
 
         var sheets = new Dictionary<string, object>
         {
-            [DataSheetName] = new List<Dictionary<string, object?>> { requiredRow, exampleRow },
+            [DataSheetName] = new List<Dictionary<string, object?>> { emptyDataRow },
             [GuideSheetName] = guideRows,
             [DictSheetName] = dictRows
         };
 
         await using var stream = new MemoryStream();
         await MiniExcel.SaveAsAsync(stream, sheets);
-        return stream.ToArray();
+        return OrderTemplateExcelOpenXmlEnhancer.Enhance(stream.ToArray(), fields, dictOptions ?? []);
+    }
+
+    private static string BuildGuideOptionText(
+        OrderTemplateFieldDefinition field,
+        IReadOnlyList<OrderTemplateDictOption> dictOptions)
+    {
+        if (string.Equals(field.DataType, "boolean", StringComparison.OrdinalIgnoreCase))
+        {
+            return "true / false";
+        }
+
+        if (string.IsNullOrWhiteSpace(field.DictType))
+        {
+            return string.Empty;
+        }
+
+        var options = dictOptions
+            .Where(x => string.Equals(x.DictType, field.DictType, StringComparison.OrdinalIgnoreCase))
+            .Select(x => string.IsNullOrWhiteSpace(x.Label) ? x.Code : $"{x.Label} ({x.Code})")
+            .Take(20)
+            .ToList();
+
+        return options.Count == 0 ? string.Empty : string.Join("；", options);
     }
 }

src/Oms.Application/Services/Orders/Templates/OrderTemplateExcelOpenXmlEnhancer.cs

@@ -0,0 +1,344 @@
+using DocumentFormat.OpenXml;
+using DocumentFormat.OpenXml.Packaging;
+using DocumentFormat.OpenXml.Spreadsheet;
+
+namespace Oms.Application.Services.Orders.Templates;
+
+/// <summary>
+/// 为标准模板 Excel 增加表头必填标黄、枚举下拉等 OpenXML 增强。
+/// </summary>
+internal static class OrderTemplateExcelOpenXmlEnhancer
+{
+    private const uint DataValidationStartRow = 2;
+    private const uint DataValidationEndRow = 5000;
+    private const string YellowHeaderRgb = "FFFFFF00";
+
+    public static byte[] Enhance(
+        byte[] workbookBytes,
+        IReadOnlyList<OrderTemplateFieldDefinition> fields,
+        IReadOnlyList<OrderTemplateDictOption> dictOptions)
+    {
+        using var stream = new MemoryStream();
+        stream.Write(workbookBytes, 0, workbookBytes.Length);
+        stream.Position = 0;
+
+        using (var document = SpreadsheetDocument.Open(stream, true))
+        {
+            var workbookPart = document.WorkbookPart
+                ?? throw new InvalidOperationException("工作簿无效");
+
+            var requiredHeaderStyleIndex = EnsureRequiredHeaderStyle(workbookPart);
+            var dataSheetPart = GetWorksheetPart(workbookPart, OrderTemplateExcelGenerator.DataSheetName)
+                ?? throw new InvalidOperationException("未找到下单数据工作表");
+
+            ApplyRequiredHeaderHighlight(dataSheetPart.Worksheet, fields, requiredHeaderStyleIndex);
+            ApplyColumnValidations(workbookPart, dataSheetPart, fields, dictOptions);
+
+            dataSheetPart.Worksheet.Save();
+            workbookPart.Workbook.Save();
+        }
+
+        return stream.ToArray();
+    }
+
+    private static void ApplyRequiredHeaderHighlight(
+        Worksheet worksheet,
+        IReadOnlyList<OrderTemplateFieldDefinition> fields,
+        uint styleIndex)
+    {
+        var sheetData = worksheet.GetFirstChild<SheetData>()
+            ?? throw new InvalidOperationException("工作表数据为空");
+
+        var headerRow = sheetData.Elements<Row>().FirstOrDefault(x => x.RowIndex?.Value == 1)
+            ?? throw new InvalidOperationException("未找到表头行");
+
+        for (var columnIndex = 0; columnIndex < fields.Count; columnIndex++)
+        {
+            if (!fields[columnIndex].Required)
+            {
+                continue;
+            }
+
+            var cellReference = $"{ToColumnName(columnIndex)}1";
+            var cell = headerRow.Elements<Cell>().FirstOrDefault(x => x.CellReference?.Value == cellReference)
+                       ?? CreateCell(headerRow, cellReference, fields[columnIndex].Label);
+            cell.StyleIndex = styleIndex;
+        }
+    }
+
+    private static void ApplyColumnValidations(
+        WorkbookPart workbookPart,
+        WorksheetPart dataSheetPart,
+        IReadOnlyList<OrderTemplateFieldDefinition> fields,
+        IReadOnlyList<OrderTemplateDictOption> dictOptions)
+    {
+        var dictRangeByType = BuildDictTypeRanges(workbookPart, dictOptions);
+        var validations = dataSheetPart.Worksheet.GetFirstChild<DataValidations>();
+        if (validations == null)
+        {
+            validations = new DataValidations();
+            dataSheetPart.Worksheet.Append(validations);
+        }
+
+        for (var columnIndex = 0; columnIndex < fields.Count; columnIndex++)
+        {
+            var field = fields[columnIndex];
+            var formula = ResolveValidationFormula(field, dictRangeByType);
+            if (string.IsNullOrWhiteSpace(formula))
+            {
+                continue;
+            }
+
+            var columnName = ToColumnName(columnIndex);
+            var validation = new DataValidation
+            {
+                Type = DataValidationValues.List,
+                AllowBlank = !field.Required,
+                ShowInputMessage = true,
+                ShowErrorMessage = true,
+                SequenceOfReferences = new ListValue<StringValue>
+                {
+                    InnerText = $"{columnName}{DataValidationStartRow}:{columnName}{DataValidationEndRow}"
+                }
+            };
+            validation.Append(new Formula1(formula));
+            validations.Append(validation);
+        }
+
+        validations.Count = (uint)validations.ChildElements.Count;
+    }
+
+    private static string? ResolveValidationFormula(
+        OrderTemplateFieldDefinition field,
+        IReadOnlyDictionary<string, string> dictRangeByType)
+    {
+        if (string.Equals(field.DataType, "boolean", StringComparison.OrdinalIgnoreCase))
+        {
+            return "\"true,false\"";
+        }
+
+        if (string.IsNullOrWhiteSpace(field.DictType))
+        {
+            return null;
+        }
+
+        if (dictRangeByType.TryGetValue(field.DictType, out var rangeFormula))
+        {
+            return rangeFormula;
+        }
+
+        return null;
+    }
+
+    private static Dictionary<string, string> BuildDictTypeRanges(
+        WorkbookPart workbookPart,
+        IReadOnlyList<OrderTemplateDictOption> dictOptions)
+    {
+        var result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        if (dictOptions.Count == 0)
+        {
+            return result;
+        }
+
+        var dictSheetPart = GetWorksheetPart(workbookPart, OrderTemplateExcelGenerator.DictSheetName);
+        if (dictSheetPart?.Worksheet == null)
+        {
+            return result;
+        }
+
+        var grouped = dictOptions
+            .Where(x => !string.IsNullOrWhiteSpace(x.DictType) && !string.IsNullOrWhiteSpace(x.Code))
+            .GroupBy(x => x.DictType, StringComparer.OrdinalIgnoreCase)
+            .OrderBy(x => x.Key, StringComparer.OrdinalIgnoreCase)
+            .ToList();
+
+        var sheetData = dictSheetPart.Worksheet.GetFirstChild<SheetData>();
+        sheetData?.RemoveAllChildren<Row>();
+        sheetData ??= new SheetData();
+        if (dictSheetPart.Worksheet.GetFirstChild<SheetData>() == null)
+        {
+            dictSheetPart.Worksheet.Append(sheetData);
+        }
+
+        var headerRow = new Row { RowIndex = 1 };
+        sheetData.InsertAt(headerRow, 0);
+
+        var columnIndex = 0;
+        foreach (var group in grouped)
+        {
+            var columnName = ToColumnName(columnIndex);
+            SetCellText(headerRow, $"{columnName}1", group.Key);
+
+            var rowIndex = 2U;
+            foreach (var option in group.OrderBy(x => x.Code, StringComparer.OrdinalIgnoreCase))
+            {
+                var row = sheetData.Elements<Row>().FirstOrDefault(x => x.RowIndex?.Value == rowIndex)
+                          ?? CreateRow(sheetData, rowIndex);
+                SetCellText(row, $"{columnName}{rowIndex}", option.Code);
+                rowIndex++;
+            }
+
+            if (rowIndex == 2)
+            {
+                columnIndex++;
+                continue;
+            }
+
+            var lastRow = rowIndex - 1;
+            var escapedSheetName = OrderTemplateExcelGenerator.DictSheetName.Replace("'", "''");
+            result[group.Key] = $"'{escapedSheetName}'!${columnName}$2:${columnName}${lastRow}";
+            columnIndex++;
+        }
+
+        dictSheetPart.Worksheet.Save();
+        return result;
+    }
+
+    private static uint EnsureRequiredHeaderStyle(WorkbookPart workbookPart)
+    {
+        var stylesPart = workbookPart.WorkbookStylesPart ?? workbookPart.AddNewPart<WorkbookStylesPart>();
+        var stylesheet = stylesPart.Stylesheet;
+        if (stylesheet == null)
+        {
+            stylesheet = new Stylesheet
+            {
+                Fonts = new Fonts(new Font()),
+                Fills = new Fills(
+                    new Fill { PatternFill = new PatternFill { PatternType = PatternValues.None } },
+                    new Fill { PatternFill = new PatternFill { PatternType = PatternValues.Gray125 } }),
+                Borders = new Borders(new Border()),
+                CellStyleFormats = new CellStyleFormats(new CellFormat()),
+                CellFormats = new CellFormats(new CellFormat())
+            };
+            stylesheet.Fonts.Count = 1;
+            stylesheet.Fills.Count = 2;
+            stylesheet.Borders.Count = 1;
+            stylesheet.CellStyleFormats.Count = 1;
+            stylesheet.CellFormats.Count = 1;
+            stylesPart.Stylesheet = stylesheet;
+        }
+
+        var fills = stylesheet.Fills ?? new Fills { Count = 0 };
+        stylesheet.Fills = fills;
+
+        var fonts = stylesheet.Fonts ?? new Fonts { Count = 0 };
+        stylesheet.Fonts = fonts;
+
+        var borders = stylesheet.Borders ?? new Borders { Count = 0 };
+        stylesheet.Borders = borders;
+
+        var cellFormats = stylesheet.CellFormats ?? new CellFormats { Count = 0 };
+        stylesheet.CellFormats = cellFormats;
+
+        if (fills.Count == 0)
+        {
+            fills.Append(new Fill { PatternFill = new PatternFill { PatternType = PatternValues.None } });
+            fills.Append(new Fill { PatternFill = new PatternFill { PatternType = PatternValues.Gray125 } });
+            fills.Count = 2;
+        }
+
+        if (fonts.Count == 0)
+        {
+            fonts.Append(new Font());
+            fonts.Count = 1;
+        }
+
+        if (borders.Count == 0)
+        {
+            borders.Append(new Border());
+            borders.Count = 1;
+        }
+
+        if (cellFormats.Count == 0)
+        {
+            cellFormats.Append(new CellFormat());
+            cellFormats.Count = 1;
+        }
+
+        var yellowFill = new Fill
+        {
+            PatternFill = new PatternFill
+            {
+                PatternType = PatternValues.Solid,
+                ForegroundColor = new ForegroundColor { Rgb = YellowHeaderRgb },
+                BackgroundColor = new BackgroundColor { Indexed = 64 }
+            }
+        };
+        fills.Append(yellowFill);
+        var yellowFillId = (uint)fills.ChildElements.Count - 1;
+        fills.Count = (uint)fills.ChildElements.Count;
+
+        var headerFont = new Font(new Bold());
+        fonts.Append(headerFont);
+        var headerFontId = (uint)fonts.ChildElements.Count - 1;
+        fonts.Count = (uint)fonts.ChildElements.Count;
+
+        var headerFormat = new CellFormat
+        {
+            FontId = headerFontId,
+            FillId = yellowFillId,
+            BorderId = 0,
+            ApplyFont = true,
+            ApplyFill = true
+        };
+        cellFormats.Append(headerFormat);
+        var headerFormatIndex = (uint)cellFormats.ChildElements.Count - 1;
+        cellFormats.Count = (uint)cellFormats.ChildElements.Count;
+
+        stylesheet.Save();
+        return headerFormatIndex;
+    }
+
+    private static WorksheetPart? GetWorksheetPart(WorkbookPart workbookPart, string sheetName)
+    {
+        var sheet = workbookPart.Workbook.Sheets?.Elements<Sheet>()
+            .FirstOrDefault(x => string.Equals(x.Name?.Value, sheetName, StringComparison.Ordinal));
+        if (sheet?.Id?.Value == null)
+        {
+            return null;
+        }
+
+        return workbookPart.GetPartById(sheet.Id.Value) as WorksheetPart;
+    }
+
+    private static Cell CreateCell(Row row, string cellReference, string text)
+    {
+        var cell = new Cell
+        {
+            CellReference = cellReference,
+            DataType = CellValues.String,
+            CellValue = new CellValue(text)
+        };
+        row.Append(cell);
+        return cell;
+    }
+
+    private static Row CreateRow(SheetData sheetData, uint rowIndex)
+    {
+        var row = new Row { RowIndex = rowIndex };
+        sheetData.Append(row);
+        return row;
+    }
+
+    private static void SetCellText(Row row, string cellReference, string text)
+    {
+        var cell = row.Elements<Cell>().FirstOrDefault(x => x.CellReference?.Value == cellReference)
+                   ?? CreateCell(row, cellReference, text);
+        cell.DataType = CellValues.String;
+        cell.CellValue = new CellValue(text);
+    }
+
+    private static string ToColumnName(int columnIndex)
+    {
+        var dividend = columnIndex + 1;
+        var columnName = string.Empty;
+        while (dividend > 0)
+        {
+            var modulo = (dividend - 1) % 26;
+            columnName = Convert.ToChar('A' + modulo) + columnName;
+            dividend = (dividend - modulo) / 26;
+        }
+
+        return columnName;
+    }
+}

src/Oms.Application/Services/Orders/Templates/OrderTemplateImportMapping.cs

@@ -49,7 +49,7 @@ public static class OrderTemplateImportMapping
         {
             StandardTemplateKey = templateKey,
             HeaderRowIndex = 1,
-            DataStartRowIndex = 4,
+            DataStartRowIndex = 2,
             Mappings = fields.Select(field => new OrderTemplateColumnMappingItem
             {
                 StandardFieldKey = field.FieldKey,