asp.net将控件或页面数据导出到Excel

利用Response.ContentType 属性，设置为application/vnd.ms-excel，将文本数据以microsoft excel的格式输出（Response）到客户端。

如，导出DataGrid:

//要导出的DataGrid控件

protected void Button2_Click(object sender, EventArgs e)

{

//要导出的控件

System.Web.UI.Control ctl = this.Label1;

//输出属性

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";

//输出空间内容到HtmlTextWriter

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);

//输出HtmlTextWriter

HttpContext.Current.Response.Write(tw.ToString());

HttpContext.Current.Response.End();

}

使用这种方法，可以将大部分控件的数据都导入到Excel文件中。如Literal、GridView、Repeater、Label，只要这些控件中的数据是格式良好的表格，导出的Excel格式也是以表格数据形式展现。

将上边的代码直接写入到Page_Load中，可以将整个页面下载为Excel文件.

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

Response.Clear();

Response.Buffer = true;

Response.AppendHeader("Content-Disposition", "attachment;filename=" + DateTime.Now.ToString("yyyyMMdd") + ".xls");

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

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

this.EnableViewState = false;

}

}