SqlDataReader或DATATABLE DATASET 到EXCEL

public void GetExcel(System.Data.SqlClient.SqlDataReader dtData)

{

System.Web.UI.WebControls.GridView dgExport = null;

// 当前对话

System.Web.HttpContext curContext = System.Web.HttpContext.Current;

// IO用于导出并返回excel文件

System.IO.StringWriter strWriter = null;

System.Web.UI.HtmlTextWriter htmlWriter = null;

if (dtData != null)

{

// 设置编码和附件格式

System.Web.HttpContext.Current.Response.Clear();

System.Web.HttpContext.Current.Response.HeaderEncoding = System.Text.Encoding.GetEncoding("gb2312");

curContext.Response.ContentType = "application/vnd.ms-excel";

curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" +Session["Project_Id"]+ "项目名单.xls"); //定义输出文件和文件名

curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;

System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.Default;

curContext.Response.Charset = "";

// 导出excel文件

strWriter = new System.IO.StringWriter();

htmlWriter = new System.Web.UI.HtmlTextWriter(strWriter);

dgExport = new System.Web.UI.WebControls.GridView();

dgExport.DataSource = dtData;

dgExport.AllowPaging = false;

dgExport.DataBind();

dgExport.RenderControl(htmlWriter);

curContext.Response.Write(strWriter.ToString());

curContext.Response.End();

}

}