在openxml中添加样式到Excel

Question

我想在我打开写入文本的excel文档中设置文本的前景色。

对于我试过：

var stylesheet1 = spreadSheet.WorkbookPart.WorkbookStylesPart.Stylesheet; 

       Fills fills1 = new Fills() { Count = (UInt32Value)5U }; 

       Fill fill5 = new Fill(); 
       PatternFill patternFill5 = new PatternFill() { PatternType = PatternValues.Solid }; 
       ForegroundColor foregroundColor3 = new ForegroundColor() { Rgb = "#FF0000" }; 
       patternFill5.Append(foregroundColor3); 

       fill5.Append(patternFill5); 

       fills1.Append(fill5); 

       stylesheet1.Fills.Append(fills1); 
       var fid = stylesheet1.Fills.Count++;   

       wbsp.Stylesheet = stylesheet1; 

       Row excelRow; 
       excelRow = new Row(); 
       excelRow.RowIndex = 0; 

       Cell cell = new Cell() 
       { 
        //create the cell reference of format A1, B2 etc 
        //CellReference = Convert.ToString(Convert.ToChar(65)), 
        CellReference = "A1", 
        DataType = CellValues.String 
       }; 


       CellValue cellValue = new CellValue(); 

       cellValue.Text = "*"; 
       //add the value to the cell 
       cell.Append(cellValue); 

       CellFormat cellFormat = null; 
       if (cell.StyleIndex.HasValue) 
       { 
        var originalCellFormat = spreadSheet.WorkbookPart.WorkbookStylesPart.Stylesheet.CellFormats.ToList()[(int)cell.StyleIndex.Value] as CellFormat; 
        //copy the original cellformat data to the new cellformat 
        if (originalCellFormat != null) 
        { 
         cellFormat = new CellFormat(originalCellFormat.OuterXml); 
        } 
        else 
        { 
         cellFormat = new CellFormat(); 
        } 
       } 
       else 
       { 
        cellFormat = new CellFormat(); 
       } 
       cellFormat.FillId = (UInt32)fid; 
       stylesheet1.CellFormats.Append(cellFormat); 
       var theStyleIndex = stylesheet1.CellFormats.Count++; 
       cell.StyleIndex = new UInt32Value { Value = (UInt32)theStyleIndex }; 
       spreadSheet.WorkbookPart.WorkbookStylesPart.Stylesheet.Save(); 

但它给了我错误的第一行：

var stylesheet1 = spreadSheet.WorkbookPart.WorkbookStylesPart.Stylesheet; 

错误：

Object not set to instance of an object.

当我的代码添加监视：

spreadSheet.WorkbookPart.WorkbookStylesPart.Stylesheet; 

我发现：spreadSheet.WorkbookPart.WorkbookStylesPart为空

请帮助我如何我可以添加到前景色细胞

Answer 1

也许SpreadsheetDocument的初始化丢失？

using (SpreadsheetDocument document = SpreadsheetDocument.Create(filePath + ".xlsx", SpreadsheetDocumentType.Workbook)) 
{ 
    WorkbookPart workbookPart = document.AddWorkbookPart(); 
    workbookPart.Workbook = new Workbook(); 

    WorksheetPart worksheetPart = workbookPart.AddNewPart<WorksheetPart>(); 
    worksheetPart.Worksheet = new Worksheet(); 

    WorkbookStylesPart workStylePart = workbookPart.AddNewPart<WorkbookStylesPart>(); 
    workStylePart.Stylesheet = new Stylesheet(); 
    var stylesheet1 = document.WorkbookPart.WorkbookStylesPart.Stylesheet; 
}