在c#中将dataset输出成xml内容的xls文件，解决其它输出不能在excel中显示“001”的前导0的问题

记得以前直接把gridview导出称excel，虽然很简单，但是却不能控制具体细节，尤其是字符串的“00001”到了excel中必定变为整数1,一直没找到解决办法，直到在codeproject上找到这个函数，它直接把数据写称excel可以读取的xml文档，仅仅把扩展名改为xls，但是效果却很好。


public static void DataSetExportToExcel(DataSet source, string fileName)




...{




System.IO.StreamWriter excelDoc;




excelDoc = new System.IO.StreamWriter(fileName);


const string startExcelXML = "<xml version> <Workbook " +


"xmlns="urn:schemas-microsoft-com:office:spreadsheet" " +


" xmlns:o="urn:schemas-microsoft-com:office:office" " +


"xmlns:x="urn:schemas- microsoft-com:office:" +


"excel" xmlns:ss="urn:schemas-microsoft-com:" +


"office:spreadsheet"> <Styles> " +


"<Style ss:ID="Default" ss:Name="Normal"> " +


"<Alignment ss:Vertical="Bottom"/> <Borders/>" +


" <Font/> <Interior/> <NumberFormat/>" +


" <Protection/> </Style> " +


"<Style ss:ID="BoldColumn"> <Font " +


"x:Family="Swiss" ss:Bold="1"/> </Style> " +


"<Style ss:ID="StringLiteral"> <NumberFormat" +


" ss:Format="@"/> </Style> <Style " +


"ss:ID="Decimal"> <NumberFormat " +


"ss:Format="0.0000"/> </Style> " +


"<Style ss:ID="Integer"> <NumberFormat " +


"ss:Format="0"/> </Style> <Style " +


"ss:ID="DateLiteral"> <NumberFormat " +


"ss:Format="mm/dd/yyyy;@"/> </Style> " +


"</Styles> ";


const string endExcelXML = "</Workbook>";




int rowCount = 0;


int sheetCount = 1;




/**//*


<xml version>


<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"


xmlns:o="urn:schemas-microsoft-com:office:office"


xmlns:x="urn:schemas-microsoft-com:office:excel"


xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">


<Styles>


<Style ss:ID="Default" ss:Name="Normal">


<Alignment ss:Vertical="Bottom"/>


<Borders/>


<Font/>


<Interior/>


<NumberFormat/>


<Protection/>


</Style>


<Style ss:ID="BoldColumn">


<Font x:Family="Swiss" ss:Bold="1"/>


</Style>


<Style ss:ID="StringLiteral">


<NumberFormat ss:Format="@"/>


</Style>


<Style ss:ID="Decimal">


<NumberFormat ss:Format="0.0000"/>


</Style>


<Style ss:ID="Integer">


<NumberFormat ss:Format="0"/>


</Style>


<Style ss:ID="DateLiteral">


<NumberFormat ss:Format="mm/dd/yyyy;@"/>


</Style>


</Styles>


<Worksheet ss:Name="Sheet1">


</Worksheet>


</Workbook>


*/


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++;


//if the number of rows is > 64000 create a new page to continue output


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":


//Excel has a specific Date Format of YYYY-MM-DD followed by


//the letter 'T' then hh:mm:sss.lll Example 2005-01-31T24:01:21.000


//The Following Code puts the date stored in XMLDate


//to the format above


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."));


}


}


excelDoc.Write("</Row>");


}


excelDoc.Write("</Table>");


excelDoc.Write(" </Worksheet>");


excelDoc.Write(endExcelXML);


excelDoc.Close();


}