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				public void ToExcel3(string FileName)
						{		
				
							Application xlApp=new ApplicationClass();		
							Workbook xlBook=xlApp.Workbooks.Add(Missing.Value);
							Worksheet xlSheet=(Worksheet)xlBook.Sheets[1];
							xlApp.Cells[1,1]="名称";
							xlApp.Cells[1,2]="种类";			
				
							Range rng = xlApp.get_Range("B1", "B1");//B1为Excel的坐标
							
							if (rng.Comment != null ) 
							{
								rng.Comment.Delete();
							}
							rng.AddComment("Comment added " + DateTime.Now);
							
							//建立一个专门存放Excel文件的目录
							string cd="";
							cd=Page.Server.MapPath("..\\..\\")+"ExcelFolder\\";
							if(!Directory.Exists(cd))
								Directory.CreateDirectory(cd);
							//删除服务端临时文件: download.xls
							if(File.Exists(cd+"download.xls"))
								File.Delete(cd+"download.xls");
							//在服务端保存download.xls,Missing.Value 来自System.Reflection; 命名空间
							xlSheet.SaveAs(cd+"download.xls",Missing.Value,Missing.Value,Missing.Value,Missing.Value,
								Missing.Value,Missing.Value,Missing.Value,Missing.Value,Missing.Value); 
				
							//杀死Excel进程
							Process []procs=Process.GetProcessesByName("excel");
							foreach(Process proc in procs)
							{
								if(!proc.CloseMainWindow())
									proc.Kill();
							}
				
						}