asp.net 导出excel（xls）文件 资料 --- 之一: xml文件格式导出

1.通过xml文件格式导出：

http://www.xue5.com/itedu/200802/107215_9.html

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 " +

<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

&nb

sp;

//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();

}

原文链接： http://www.xue5.com/itedu/200802/107215_9.html