[ASP.NET]两种导出网页到EXCEL的方法

第一种，将DataGrid作为参数传入，将DataGrid转成Excel

public bool ToExcel(System.Web.UI.Control ctl)
{
try
{
HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
HttpContext.Current.Response.Charset ="UTF-8";
HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
HttpContext.Current.Response.ContentType ="application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword
ctl.Page.EnableViewState =false;
System.IO.StringWriter tw = new System.IO.StringWriter() ;
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
ctl.RenderControl(hw);
HttpContext.Current.Response.Write(tw.ToString());
HttpContext.Current.Response.End();
return true;
}
catch(Exception e)
{
_errormsg = e.Message;
return false;
}
}

第二种，直接将DataSet导出成Excel

public void CreateExcel(DataSet ds,string typeid,string FileName)
{
HttpResponse resp;
resp = Page.Response;
resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);
resp.Charset ="UTF-8";

string colHeaders= "", ls_item="";
int i=0;

//定义表对象与行对像，同时用DataSet对其值进行初始化
DataTable dt=ds.Tables[0];
DataRow[] myRow=dt.Select("");
// typeid=="1"时导出为EXCEL格式文件；typeid=="2"时导出为XML格式文件
if(typeid=="1")
{

resp.ContentType ="application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword
//取得数据表各列标题，各标题之间以\t分割，最后一个列标题后加回车符
for(i=0;i<dt.Columns.Count-1;i++)
colHeaders+=dt.Columns[i].Caption.ToString()+"\t";
colHeaders +=dt.Columns[i].Caption.ToString() +"\n";
//向HTTP输出流中写入取得的数据信息
resp.Write(colHeaders);
//逐行处理数据
foreach(DataRow row in myRow)
{
//在当前行中，逐列获得数据，数据之间以\t分割，结束时加回车符\n
for(i=0;i<dt.Columns.Count-1;i++)
ls_item +=row[i].ToString().Replace("\t","") + "\t";
ls_item += row[i].ToString().Replace("\t","") +"\n";
//当前行数据写入HTTP输出流，并且置空ls_item以便下行数据
resp.Write(ls_item);
ls_item="";
}
}
else
{
if(typeid=="2")
{
//从DataSet中直接导出XML数据并且写到HTTP输出流中
resp.Write(ds.GetXml());
}
}
//写缓冲区中的数据到HTTP头文件中
resp.End();
}