public void CreateExcel1(DataSet ds, string typeid, string FileName)
{
HttpResponse resp = System.Web.HttpContext.Current.Response;
resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);
resp.Charset = "UTF-8";
//HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
resp.ContentType = "application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel
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")
{
//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
colHeaders += "<table cellspacing=\"0\" cellpadding=\"5\" rules=\"all\" border=\"1\"> <tr style=\"font-weight: bold; white-space: nowrap;\">";
for (i = 0; i < dt.Columns.Count - 1; i++)
//colHeaders+=dt.Columns[i].Caption.ToString()+"\t";
colHeaders += "<td>" + dt.Columns[i].Caption.ToString() + "</td>";
//colHeaders +=dt.Columns[i].Caption.ToString() +"\n";
colHeaders += "<td>" + dt.Columns[i].Caption.ToString() + "</td></tr>";
//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)
{
ls_item += "<tr>";
//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 += "<td style=\"vnd.ms-excel.numberformat:@\">" + row[i].ToString().Replace("\t", "") + "</td>";
ls_item += "<td>" + row[i].ToString().Replace("\t", "") + "</td></tr>";
//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();
}
//csharp/7262