B/S模式下DataSet导出保存为EXCEL直接可以Respone出来，比较简单，而C/S模式下将DataSet导出到EXCEL相对比较麻烦，要使用EXCEL要引用Microsoft.Office.Interop.Excel，经常会出现一些EXCEL进程无法关闭的问题，很让人厌恶，查看了网上一些资料，其实EXCEL也是有他自己的固定的XML格式的
。具体格式如下，首先要先定义好它的头部分，显示出来的EXCEL 才不会错误。
public string ExcelHeader()
{
System.Text.StringBuilder sb = new System.Text.StringBuilder(); sb.Append("<?xml version=\"1.0\"?>\n"); sb.Append("<?mso-application progid=\"Excel.Sheet\"?>\n"); sb.Append( "<Workbook xmlns=\"urn:schemas-microsoft-com:office:spreadsheet\" "); sb.Append("xmlns:o=\"urn:schemas-microsoft-com:office:office\" "); sb.Append("xmlns:x=\"urn:schemas-microsoft-com:office:excel\" "); sb.Append("xmlns:ss=\"urn:schemas-microsoft-com:office:spreadsheet\" "); sb.Append("xmlns:html=\"http://www.w3.org/TR/REC-html40\">\n"); sb.Append( "<DocumentProperties xmlns=\"urn:schemas-microsoft-com:office:office\">"); sb.Append("</DocumentProperties>"); sb.Append( "<ExcelWorkbook xmlns=\"urn:schemas-microsoft-com:office:excel\">\n"); sb.Append("<ProtectStructure>False</ProtectStructure>\n"); sb.Append("<ProtectWindows>False</ProtectWindows>\n"); sb.Append("</ExcelWorkbook>\n"); return sb.ToString();
}
接下来就是具体的内容了，包括DATASET,DATATABLE，等数据源
public void exportToExcel(DataSet source, string fileName) { position = 0; System.IO.StreamWriter excelDoc; excelDoc = new System.IO.StreamWriter(fileName); string startExcelXML = ExcelHeader(); startExcelXML += "<Styles>\r\n " + "<Style ss:ID=\"Default\" ss:Name=\"Normal\">\r\n " + "<Alignment ss:Vertical=\"Bottom\"/>\r\n <Borders/>" + "\r\n <Font/>\r\n <Interior/>\r\n <NumberFormat/>" + "\r\n <Protection/>\r\n </Style>\r\n " + "<Style ss:ID=\"BoldColumn\">\r\n <Font " + "x:Family=\"Swiss\" ss:Bold=\"1\"/>\r\n </Style>\r\n " + "<Style ss:ID=\"StringLiteral\">\r\n <NumberFormat" + " ss:Format=\"@\"/>\r\n </Style>\r\n <Style " + "ss:ID=\"Decimal\">\r\n <NumberFormat " + "ss:Format=\"0.0000\"/>\r\n </Style>\r\n " + "<Style ss:ID=\"Integer\">\r\n <NumberFormat " + "ss:Format=\"0\"/>\r\n </Style>\r\n <Style " + "ss:ID=\"DateLiteral\">\r\n <NumberFormat " + "ss:Format=\"mm/dd/yyyy;@\"/>\r\n </Style>\r\n " + "</Styles>\r\n "; const string endExcelXML = "</Workbook>"; int rowCount = 0; int sheetCount = 1; excelDoc.Write(startExcelXML); excelDoc.Write("<Worksheet ss:Name=\"Sheet" + sheetCount + "\">"); excelDoc.Write("<Table>"); excelDoc.Write("<Row>"); for (int x = 0; x < source.Tables[0].Columns.Count; x++)
{
excelDoc.Write("<Cell ss:StyleID=\"BoldColumn\"><Data ss:Type=\"String\">"); excelDoc.Write(source.Tables[0].Columns[x].ColumnName); excelDoc.Write("</Data></Cell>");
} excelDoc.Write("</Row>"); foreach (DataRow x in source.Tables[0].Rows) { rowCount++;//Excel 最多只能显示64000条数据，在同一个WorkSheet里 if (rowCount == 64000) { rowCount = 0; sheetCount++; excelDoc.Write("</Table>"); excelDoc.Write(" </Worksheet>"); excelDoc.Write("<Worksheet ss:Name=\"Sheet" + sheetCount + "\">"); excelDoc.Write("<Table>"); } excelDoc.Write("<Row>"); //ID=" + rowCount + " for (int y = 0; y < source.Tables[0].Columns.Count; y++) { System.Type rowType; rowType = x[y].GetType(); switch (rowType.ToString()) { case "System.String": string XMLstring = x[y].ToString(); XMLstring = XMLstring.Trim(); XMLstring = XMLstring.Replace("&", "&"); XMLstring = XMLstring.Replace(">", ">"); XMLstring = XMLstring.Replace("<", "<"); excelDoc.Write("<Cell ss:StyleID=\"StringLiteral\">" + "<Data ss:Type=\"String\">"); excelDoc.Write(XMLstring); excelDoc.Write("</Data></Cell>"); break; case "System.DateTime": DateTime XMLDate = (DateTime)x[y]; string XMLDatetoString = ""; //Excel Converted Date XMLDatetoString = XMLDate.Year.ToString() + "-" + (XMLDate.Month < 10 ? "0" + XMLDate.Month.ToString() : XMLDate.Month.ToString()) + "-" + (XMLDate.Day < 10 ? "0" + XMLDate.Day.ToString() : XMLDate.Day.ToString()) + "T" + (XMLDate.Hour < 10 ? "0" + XMLDate.Hour.ToString() : XMLDate.Hour.ToString()) + ":" + (XMLDate.Minute < 10 ? "0" + XMLDate.Minute.ToString() : XMLDate.Minute.ToString()) + ":" + (XMLDate.Second < 10 ? "0" + XMLDate.Second.ToString() : XMLDate.Second.ToString()) + ".000"; excelDoc.Write("<Cell ss:StyleID=\"DateLiteral\">" + "<Data ss:Type=\"DateTime\">"); excelDoc.Write(XMLDatetoString); excelDoc.Write("</Data></Cell>"); break; case "System.Boolean": excelDoc.Write("<Cell ss:StyleID=\"StringLiteral\">" + "<Data ss:Type=\"String\">"); excelDoc.Write(x[y].ToString()); excelDoc.Write("</Data></Cell>"); break; case "System.Int16": case "System.Int32": case "System.Int64": case "System.Byte": excelDoc.Write("<Cell ss:StyleID=\"Integer\">" + "<Data ss:Type=\"Number\">"); excelDoc.Write(x[y].ToString()); excelDoc.Write("</Data></Cell>"); break; case "System.Decimal": case "System.Double": excelDoc.Write("<Cell ss:StyleID=\"Decimal\">" + "<Data ss:Type=\"Number\">"); excelDoc.Write(x[y].ToString()); excelDoc.Write("</Data></Cell>"); break; case "System.DBNull": excelDoc.Write("<Cell ss:StyleID=\"StringLiteral\">" + "<Data ss:Type=\"String\">"); excelDoc.Write(""); excelDoc.Write("</Data></Cell>"); break; default: throw (new Exception(rowType.ToString() + " not handled.")); } position = y; ProgressEventArgs pe = new ProgressEventArgs(position); OnProgressChange(pe); } excelDoc.Write("</Row>"); } excelDoc.Write("</Table>"); excelDoc.Write(" </Worksheet>"); excelDoc.Write(endExcelXML); excelDoc.Close(); }}