解决excel2007文件使用excel2003打开文件格式不兼容问题

public void ExportToExcel(DataSet source, string fileName)

{

System.IO.StreamWriter excelDoc;

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

const string startExcelXML = "<xml version>/r/n<Workbook " +

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

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

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

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

"office:spreadsheet/">/r/n <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;

#region -- 格式 --

/*

<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>

*/

#endregion

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>");

this.progressBar1.Value=rowCount;

}

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

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

excelDoc.Write(endExcelXML);

excelDoc.Close();

}