使用openxml在excel中將特定單元格應用到特定單元格

Question

以下是我擁有的代碼，在下面的最後一個方法中，我將執行所有操作。請忽略方法的返回類型，稍後我會對其進行更改。

public static byte[] CreateExcelDocument<T>(List<T> list, string filename) 
     { 
      DataSet ds = new DataSet(); 
      ds.Tables.Add(ListToDataTable(list)); 
      byte[] byteArray = CreateExcelDocumentAsStream(ds, filename); 
      return byteArray; 
     } 
public static bool CreateExcelDocumentAsStream(DataSet ds, string filename, System.Web.HttpResponse Response) 
     { 
      try 
      { 
       System.IO.MemoryStream stream = new System.IO.MemoryStream(); 
       using (SpreadsheetDocument document = SpreadsheetDocument.Create(stream, SpreadsheetDocumentType.Workbook, true)) 
       { 
        WriteExcelFile(ds, document); 
       } 
       stream.Flush(); 
       stream.Position = 0; 

       Response.ClearContent(); 
       Response.Clear(); 
       Response.Buffer = true; 
       Response.Charset = ""; 

       // NOTE: If you get an "HttpCacheability does not exist" error on the following line, make sure you have 
       // manually added System.Web to this project's References. 

       Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache); 
       Response.AddHeader("content-disposition", "attachment; filename=" + filename); 
       Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; 
       byte[] data1 = new byte[stream.Length]; 
       stream.Read(data1, 0, data1.Length); 
       stream.Close(); 
       Response.BinaryWrite(data1); 
       Response.Flush(); 
       Response.End(); 

       return true; 
      } 
      catch (Exception ex) 
      { 
       Trace.WriteLine("Failed, exception thrown: " + ex.Message); 
       return false; 
      } 
     } 

private static void WriteExcelFile(DataSet ds, SpreadsheetDocument spreadsheet) 
     { 
      // Create the Excel file contents. This function is used when creating an Excel file either writing 
      // to a file, or writing to a MemoryStream. 
      spreadsheet.AddWorkbookPart(); 
      spreadsheet.WorkbookPart.Workbook = new DocumentFormat.OpenXml.Spreadsheet.Workbook(); 

      // My thanks to James Miera for the following line of code (which prevents crashes in Excel 2010) 
      spreadsheet.WorkbookPart.Workbook.Append(new BookViews(new WorkbookView())); 

      // If we don't add a "WorkbookStylesPart", OLEDB will refuse to connect to this .xlsx file ! 
      WorkbookStylesPart workbookStylesPart = spreadsheet.WorkbookPart.AddNewPart<WorkbookStylesPart>("rIdStyles"); 
      //var workbookStylesPart = spreadsheet.WorkbookPart.AddNewPart<WorkbookStylesPart>(); 
      Stylesheet stylesheet = new Stylesheet(new Fills(
       // Index 0 - required, reserved by Excel - no pattern 
        new Fill(new PatternFill { PatternType = PatternValues.None }), 
       // Index 1 - required, reserved by Excel - fill of gray 125 
        new Fill(new PatternFill { PatternType = PatternValues.Gray125 }), 
       // Index 2 - no pattern text on gray background 
        new Fill(new PatternFill 
        { 
         PatternType = PatternValues.Solid, 
         BackgroundColor = new BackgroundColor { Indexed = 64U }, 
         ForegroundColor = new ForegroundColor { Rgb = "FFD9D9D9" } 
        }) 
       ));    
      workbookStylesPart.Stylesheet = stylesheet; 
      workbookStylesPart.Stylesheet.Save(); 
      // create a solid red fill 



      // Loop through each of the DataTables in our DataSet, and create a new Excel Worksheet for each. 
      uint worksheetNumber = 1; 
      Sheets sheets = spreadsheet.WorkbookPart.Workbook.AppendChild<Sheets>(new Sheets()); 
      foreach (DataTable dt in ds.Tables) 
      { 
       // For each worksheet you want to create 
       string worksheetName = dt.TableName; 

       // Create worksheet part, and add it to the sheets collection in workbook 
       WorksheetPart newWorksheetPart = spreadsheet.WorkbookPart.AddNewPart<WorksheetPart>(); 
       Sheet sheet = new Sheet() { Id = spreadsheet.WorkbookPart.GetIdOfPart(newWorksheetPart), SheetId = worksheetNumber, Name = worksheetName }; 
       sheets.Append(sheet); 

       // Append this worksheet's data to our Workbook, using OpenXmlWriter, to prevent memory problems 
       WriteDataTableToExcelWorksheet(dt, newWorksheetPart); 

       worksheetNumber++; 
      } 

      spreadsheet.WorkbookPart.Workbook.Save();    
      spreadsheet.Close(); 
     } 

     private static void WriteDataTableToExcelWorksheet(DataTable dt, WorksheetPart worksheetPart) 
     { 
      OpenXmlWriter writer = OpenXmlWriter.Create(worksheetPart); 
      writer.WriteStartElement(new Worksheet()); 
      writer.WriteStartElement(new SheetData()); 

      string cellValue = ""; 

      // Create a Header Row in our Excel file, containing one header for each Column of data in our DataTable. 
      // 
      // We'll also create an array, showing which type each column of data is (Text or Numeric), so when we come to write the actual 
      // cells of data, we'll know if to write Text values or Numeric cell values. 
      int numberOfColumns = dt.Columns.Count; 
      bool[] IsNumericColumn = new bool[numberOfColumns]; 

      string[] excelColumnNames = new string[numberOfColumns]; 
      for (int n = 0; n < numberOfColumns; n++) 
       excelColumnNames[n] = GetExcelColumnName(n); 

      // 
      // Create the Header row in our Excel Worksheet 
      // 
      uint rowIndex = 1; 

      writer.WriteStartElement(new Row { RowIndex = rowIndex }); 
      for (int colInx = 0; colInx < numberOfColumns; colInx++) 
      { 
       DataColumn col = dt.Columns[colInx]; 
       //AppendTextCell(excelColumnNames[colInx] + "1", col.ColumnName, ref writer); 
       AppendTextCell1(excelColumnNames[colInx] + "1", col.ColumnName, ref writer); 
       IsNumericColumn[colInx] = (col.DataType.FullName == "System.Decimal") || (col.DataType.FullName == "System.Int32") || (col.DataType.FullName == "System.Double") || (col.DataType.FullName == "System.Single"); 
      } 
      writer.WriteEndElement(); // End of header "Row" 

      // 
      // Now, step through each row of data in our DataTable... 
      // 
      double cellNumericValue = 0; 
      foreach (DataRow dr in dt.Rows) 
      { 
       // ...create a new row, and append a set of this row's data to it. 
       ++rowIndex; 

       writer.WriteStartElement(new Row { RowIndex = rowIndex }); 

       for (int colInx = 0; colInx < numberOfColumns; colInx++) 
       { 
        cellValue = dr.ItemArray[colInx].ToString(); 

        // Create cell with data 
        if (IsNumericColumn[colInx]) 
        { 
         // For numeric cells, make sure our input data IS a number, then write it out to the Excel file. 
         // If this numeric value is NULL, then don't write anything to the Excel file. 
         cellNumericValue = 0; 
         if (double.TryParse(cellValue, out cellNumericValue)) 
         { 
          cellValue = cellNumericValue.ToString(); 
          AppendNumericCell(excelColumnNames[colInx] + rowIndex.ToString(), cellValue, ref writer); 
         } 
        } 
        else 
        { 
         // For text cells, just write the input data straight out to the Excel file. 
         AppendTextCell(excelColumnNames[colInx] + rowIndex.ToString(), cellValue, ref writer); 
        } 
       } 
       writer.WriteEndElement(); // End of Row 
      } 
      writer.WriteEndElement(); // End of SheetData 
      writer.WriteEndElement(); // End of worksheet 

      writer.Close(); 
     } 

     private static void AppendTextCell(string cellReference, string cellStringValue, ref OpenXmlWriter writer) 
     { 
      // Add a new Excel Cell to our Row 
      //writer.WriteElement(new Cell { CellValue = new CellValue(cellStringValue), CellReference = cellReference, DataType = CellValues.String }); 
      writer.WriteElement(new Cell { CellValue = new CellValue(cellStringValue), CellReference = cellReference, DataType = CellValues.String });    
     } 
     private static void AppendTextCell1(string cellReference, string cellStringValue, ref OpenXmlWriter writer) 
     { 
      // Add a new Excel Cell to our Row 
      //writer.WriteElement(new Cell { CellValue = new CellValue(cellStringValue), CellReference = cellReference, DataType = CellValues.String }); 
      writer.WriteElement(new Cell(new CellValue(cellStringValue)) { CellReference = cellReference, DataType = CellValues.String, StyleIndex = 2 }); 
     } 

     private static void AppendNumericCell(string cellReference, string cellStringValue, ref OpenXmlWriter writer) 
     { 
      // Add a new Excel Cell to our Row 
      writer.WriteElement(new Cell { CellValue = new CellValue(cellStringValue), CellReference = cellReference, DataType = CellValues.Number }); 
     } 

以上是我的代碼。我嘗試通過填充樣式表來添加顏色，但是我不理解應用於單元格的styleindex的概念。請幫忙。

Answer 1

This MSDN blog for Stylizing Excel有您需要的信息。

使用Open XML 2.0文章的Stylizing Excel工作表通過更改格式適用於背景顏色。