在日常工作中,经常要将gridview中的内容导出到excel报表中去,在ASP.NET 2.0中,同样可以很方便地实现将整个gridview中的内容导出到excel报表中去,下面介绍其具体做法:
首先,建立基本的页面default.aspx
<form id="form1" runat="server"> <div> <asp:GridView ID="GridView1" runat="server"> </asp:GridView> </div> <br/> <asp:Button ID="BtnExport" runat="server" OnClick="BtnExport_Click" Text="Export to Excel" /> </form> |
在default.aspx.cs中,写入如下代码:
protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { BindData(); } } private void BindData() { string query = "SELECT * FROM customers"; SqlConnection myConnection = new SqlConnection(ConnectionString); SqlDataAdapter ad = new SqlDataAdapter(query, myConnection); DataSet ds = new DataSet(); ad.Fill(ds, "customers"); GridView1.DataSource = ds; GridView1.DataBind(); } public override void VerifyRenderingInServerForm(Control control) { // Confirms that an HtmlForm control is rendered for } protected void Button1_Click(object sender, EventArgs e) { Response.Clear(); Response.AddHeader("content-disposition","attachment;filename=FileName.xls"); Response.Charset = "gb2312"; Response.ContentType = "application/vnd.xls"; System.IO.StringWriter stringWrite = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter htmlWrite =new HtmlTextWriter(stringWrite); GridView1.AllowPaging = false; BindData(); GridView1.RenderControl(htmlWrite); Response.Write(stringWrite.ToString()); Response.End(); GridView1.AllowPaging = true; BindData(); } protected void paging(object sender,GridViewPageEventArgs e) { GridView1.PageIndex = e.NewPageIndex; BindData(); } |
在上面的代码中,我们首先将gridview绑定到指定的数据源中,然后在button1的按钮(用来做导出到EXCEL的)的事件中,写入相关的代码。这里使用Response.AddHeader("content-disposition","attachment;filename=exporttoexcel.xls");中的filename来指定将要导出的excel的文件名,这里是exporttoexcel.xls。要注意的是,由于gridview的内容可能是分页显示的,因此,这里在每次导出excel时,先将gridview的allowpaging属性设置为false,然后通过页面流的方式导出当前页的gridview到excel中,最后再重新设置其allowpaging属性。另外要注意的是,要写一个空的VerifyRenderingInServerForm方法(必须写),以确认在运行时为指定的ASP.NET 服务器控件呈现HtmlForm 控件。