1、从 数据库 中 导出 excel  表格 

    定义 一个 gridview1

 

protected void Button1_Click(object sender, EventArgs e) //倒出数据

{

     if (GridView1.Rows.Count == 0)

   {

       return;

    }

   else

  {

       GridView1.AllowPaging = false;//先将数据分页取消，才能全部导出数据

      bind();

       Export("application/ms-excel", "FileName.xls", GridView1);

      GridView1.AllowPaging = true;//绑定完数据后，才重新绑定数据

      bind();

   }

   

public void Export(string fileType, string fileName, GridView gd)//数据导出函数

{

Response.Clear();

Response.Buffer = true;

HttpContext.Current.Response.Charset = "GB2312";

HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-7");

HttpContext.Current.Response.ContentType = fileType;

HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF7));

gd.Page.EnableViewState = false;

System.IO.StringWriter tw = new StringWriter();

HtmlTextWriter hw = new HtmlTextWriter(tw);

gd.RenderControl(hw);

Response.Output.Write(tw.ToString());

Response.Flush();

Response.End();

}

//如果没有下面方法会报错类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标记内

public override void VerifyRenderingInServerForm(Control control)

{

}

 

2、从excel 导入到 数据库 中