原例子使用vb.net写的，以下的用c#改写的代码
原文代码：
http://www.gotdotnet.com/community/usersamples/details.aspx?sampleguid=ddbaecb9-a260-4656-9f22-300b6a1ce66c
本例使用xml来创建excel文档，但在运行时不需要安装excel程序。
dataset mdsdata = new dataset();
mdsdata.tables.add("mytable");
mdsdata.tables["mytable"].columns.add("id");
mdsdata.tables["mytable"].columns.add("name");
mdsdata.tables["mytable"].columns.add("password");
for (int i = 0; i < 10; i++)
{
datarow dr = mdsdata.tables["mytable"].newrow();
dr["id"] = i;
dr["name"] = i;
dr["password"] = i;
mdsdata.tables["mytable"].rows.add(dr);
}
savefiledialog dialog1 = new savefiledialog();
dialog1.addextension = true;
dialog1.checkpathexists = true;
dialog1.filter = "excel workbooks (*.xls) | *.xls";
dialog1.overwriteprompt = true;
dialog1.title = "save excel formatted report";
if (dialog1.showdialog() == dialogresult.ok)
{
int num2 = 0;
int num3 = mdsdata.tables[0].rows.count + 1;
int num1 = mdsdata.tables[0].columns.count;
num2 = 0;
string text1 = dialog1.filename;
if (file.exists(text1))
{
file.delete(text1);
}
streamwriter writer1 = new streamwriter(text1, false);
streamwriter writer2 = writer1;
writer2.writeline("<?xml version=/"1.0/"?>");
writer2.writeline("<?mso-application progid=/"excel.sheet/"?>");
writer2.writeline("<workbook xmlns=/"urn:schemas-microsoft-com:office:spreadsheet/"");
writer2.writeline(" xmlns:o=/"urn:schemas-microsoft-com:office:office/"");
writer2.writeline(" xmlns:x=/"urn:schemas-microsoft-com:office:excel/"");
writer2.writeline(" xmlns:ss=/"urn:schemas-microsoft-com:office:spreadsheet/"");
writer2.writeline(" xmlns:html=/"http://www.w3.org/tr/rec-html40/">");
writer2.writeline(" <documentproperties xmlns=/"urn:schemas-microsoft-com:office:office/">");
writer2.writeline(" <author>automated report generator example</author>");
writer2.writeline(string.format(" <created>{0}t{1}z</created>", datetime.now.tostring("yyyy-mm-dd"), datetime.now.tostring("hh:mm:ss")));
writer2.writeline(" <company>your company here</company>");
writer2.writeline(" <version>11.6408</version>");
writer2.writeline(" </documentproperties>");
writer2.writeline(" <excelworkbook xmlns=/"urn:schemas-microsoft-com:office:excel/">");
writer2.writeline(" <windowheight>8955</windowheight>");
writer2.writeline(" <windowwidth>11355</windowwidth>");
writer2.writeline(" <windowtopx>480</windowtopx>");
writer2.writeline(" <windowtopy>15</windowtopy>");
writer2.writeline(" <protectstructure>false</protectstructure>");
writer2.writeline(" <protectwindows>false</protectwindows>");
writer2.writeline(" </excelworkbook>");
writer2.writeline(" <styles>");
writer2.writeline(" <style ss:id=/"default/" ss:name=/"normal/">");
writer2.writeline(" <alignment ss:vertical=/"bottom/"/>");
writer2.writeline(" <borders/>");
writer2.writeline(" <font/>");
writer2.writeline(" <interior/>");
writer2.writeline(" <protection/>");
writer2.writeline(" </style>");
writer2.writeline(" <style ss:id=/"s21/">");
writer2.writeline(" <alignment ss:vertical=/"bottom/" ss:wraptext=/"1/"/>");
writer2.writeline(" </style>");
writer2.writeline(" </styles>");
writer2.writeline(" <worksheet ss:name=/"myreport/">");
writer2.writeline(string.format(" <table ss:expandedcolumncount=/"{0}/" ss:expandedrowcount=/"{1}/" x:fullcolumns=/"1/"", num1.tostring(), num3.tostring()));
writer2.writeline(" x:fullrows=/"1/">");
foreach (datarow row1 in mdsdata.tables[0].rows)
{
writer2.writeline("<row>");
for (num2 = 0; num2 != num1; num2++)
{
writer2.write("<cell ss:styleid=/"s21/"><data ss:type=/"string/">");
writer2.write(row1[num2].tostring());
writer2.writeline("</data></cell>");
}
writer2.writeline("</row>");
}
writer2.writeline(" </table>");
writer2.writeline(" <worksheetoptions xmlns=/"urn:schemas-microsoft-com:office:excel/">");
writer2.writeline(" <selected/>");
writer2.writeline(" <panes>");
writer2.writeline(" <pane>");
writer2.writeline(" <number>3</number>");
writer2.writeline(" <activerow>1</activerow>");
writer2.writeline(" </pane>");
writer2.writeline(" </panes>");
writer2.writeline(" <protectobjects>false</protectobjects>");
writer2.writeline(" <protectscenarios>false</protectscenarios>");
writer2.writeline(" </worksheetoptions>");
writer2.writeline(" </worksheet>");
writer2.writeline(" <worksheet ss:name=/"sheet2/">");
writer2.writeline(" <worksheetoptions xmlns=/"urn:schemas-microsoft-com:office:excel/">");
writer2.writeline(" <protectobjects>false</protectobjects>");
writer2.writeline(" <protectscenarios>false</protectscenarios>");
writer2.writeline(" </worksheetoptions>");
writer2.writeline(" </worksheet>");
writer2.writeline(" <worksheet ss:name=/"sheet3/">");
writer2.writeline(" <worksheetoptions xmlns=/"urn:schemas-microsoft-com:office:excel/">");
writer2.writeline(" <protectobjects>false</protectobjects>");
writer2.writeline(" <protectscenarios>false</protectscenarios>");
writer2.writeline(" </worksheetoptions>");
writer2.writeline(" </worksheet>");
writer2.writeline("</workbook>");
writer2 = null;
writer1.close();
messagebox.show("report created", "success", messageboxbuttons.ok, messageboxicon.asterisk);
}
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