项目用到的一种导出excel 的方法予以记录：（具体的业务类可更具情况替换使用）
protected void Export(string filename, List<ComponentConmentDetailHelp> list)
{
string[][] cols = new string[][] {
new string[] { "Id", "主键" },
new string[] { "UserCode","员工卡号"},
new string[] { "UserName","姓名"},
new string[] { "Comment", "评论内容"},
new string[] { "AuthdorName", "作者"},
new string[] { "FileName", "文件名"},
new string[] { "Ts","时间"}
};
StringBuilder builder = new StringBuilder();
builder.Append("<html xmlns:o="urn:schemas-microsoft-com:office:office"");
builder.Append("xmlns:x="urn:schemas-microsoft-com:office:excel"");
builder.Append("xmlns="http://www.w3.org/TR/REC-html40"");
builder.Append("<head>");
builder.Append("<meta http-equiv='Content-Type' content='text/html; charset=utf-8'>");
builder.Append("<style>");
builder.Append(".xl26");
builder.Append("{mso-style-parent:style0;");
builder.Append("font-family:"Times New Roman", serif;");
builder.Append("mso-font-charset:0;");
builder.Append("mso-number-format:"@";}");
builder.Append("</style>");
builder.Append("<xml>");
builder.Append("<x:ExcelWorkbook>");
builder.Append("<x:ExcelWorksheets>");
builder.Append("<x:ExcelWorksheet>");
builder.Append("<x:Name>Sheet1</x:Name>");
builder.Append("<x:WorksheetOptions>");
builder.Append("<x:DefaultRowHeight>285</x:DefaultRowHeight>");
builder.Append("<x:Selected/>");
builder.Append("<x:Panes>");
builder.Append("<x:Pane>");
builder.Append("<x:Number>3</x:Number>");
builder.Append("<x:ActiveCol>1</x:ActiveCol>");
builder.Append("</x:Pane>");
builder.Append("</x:Panes>");
builder.Append("<x:ProtectContents>False</x:ProtectContents>");
builder.Append("<x:ProtectObjects>False</x:ProtectObjects>");
builder.Append("<x:ProtectScenarios>False</x:ProtectScenarios>");
builder.Append("</x:WorksheetOptions>");
builder.Append("</x:ExcelWorksheet>");
builder.Append("<x:WindowHeight>6750</x:WindowHeight>");
builder.Append("<x:WindowWidth>10620</x:WindowWidth>");
builder.Append("<x:WindowTopX>480</x:WindowTopX>");
builder.Append("<x:WindowTopY>75</x:WindowTopY>");
builder.Append("<x:ProtectStructure>False</x:ProtectStructure>");
builder.Append("<x:ProtectWindows>False</x:ProtectWindows>");
builder.Append("</x:ExcelWorkbook>");
builder.Append("</xml>");
builder.Append("</head>");
builder.Append("<body>");
builder.Append("<table align="center"style='border-collapse:collapse;table-layout:fixed'>");
builder.Append("<tr>");
System.IO.StringWriter writer = new System.IO.StringWriter();
foreach (string[] col in cols)
{
builder.Append("<td><b>" + col[1] + "</b></td>");
}
builder.Append("</tr>");
foreach (ComponentConmentDetailHelp item in list)
{
Type type = item.GetType();//获取类型
builder.Append("<tr>");
foreach (string[] col in cols)
{
System.Reflection.PropertyInfo propertyInfo = type.GetProperty(col[0]);
string val = Convert.ToString(propertyInfo.GetValue(item, null));
builder.Append("<td class='xl26'>" + val + "</td>");
}
builder.Append("</tr>");
}
builder.Append("</body>");
builder.Append("</html>");
WebUtility.ExportToFile(filename + ".xls", builder.ToString(), "application/ms-excel");
}