NPOI 自定義單元格背景顏色 XSSFWorkbook - Excel

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網上找到了，HSSFWorkbook自定義顏色的例子(講的還挺細致的)，但是XSSFWorkbook確沒找到...研究了一下，坑掉了一地...

NPOI.XSSF.UserModel.XSSFWorkbook xssfworkbook = new NPOI.XSSF.UserModel.XSSFWorkbook();

方案壹：>>XSSFCellStyle

XSSFCellStyle rowsStyleColor = (XSSFCellStyle)xssfworkbook.CreateCellStyle();
XSSFColor xssfColor = new XSSFColor();
//根據自己需要設置RGB
byte[] colorRgb = { (byte)252, (byte)139, (byte)139 };
xssfColor.SetRgb(colorRgb);
rowsStyleColor.FillForegroundColorColor = xssfColor;
rowsStyleColor.FillPattern = FillPattern.SolidForeground;

方案貳：>>ICellStyle

ICellStyle rowsStyleColor = (XSSFCellStyle)xssfworkbook.CreateCellStyle();
rowsStyleColor.Alignment = HorizontalAlignment.Center;
rowsStyleColor.VerticalAlignment = VerticalAlignment.Center;
rowsStyleColor.BorderBottom = BorderStyle.Thin;
rowsStyleColor.BorderLeft = BorderStyle.Thin;
rowsStyleColor.BorderRight = BorderStyle.Thin;
rowsStyleColor.BorderTop = BorderStyle.Thin;
rowsStyleColor.WrapText = true;
//設置背景顏色...
rowsStyleColor.FillForegroundColor = 0;
rowsStyleColor.FillPattern = FillPattern.SolidForeground;
((XSSFColor)rowsStyleColor.FillForegroundColorColor).SetRgb(new byte[] { 252, 139, 139 });

 

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感覺挺別扭的...一點搞不好，就是錯誤...

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其他的報錯:

//****************************文件流...
public ActionResult ExportExcelFile()
{
    byte[] streamData = null;

    try
    {

　　　　MemoryStream file = new MemoryStream(); 　　　　workbook.Write(file);
　　　　/*這個錯誤導致我一直以為NPOI不能導出不報錯的.xlsx類型的Excel呢!!!···*/ 　　　　streamData = file.ToArray();//這種寫法就可以的... 　　　　//streamData =file.GetBuffer();//用這么的寫法，導出的Excel，就是報錯,類似格式不正確，需要修復才能打開...

        if (streamData == null || streamData.Length == 0) { return Content("無數據供導出。"); }

        Response.Charset = "UTF-8";
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
        Response.ContentType = "application/octet-stream";
        Response.AddHeader("Content-Disposition", "filename=Test.xlsx");
        Response.AddHeader("Content-Length", streamData.LongLength.ToString());
        Response.BinaryWrite(streamData);
        Response.Flush();
        Response.End();

        return null;
    }
    catch (Exception ex)
    {
        return Content("未知錯誤>>>");
    }
}