一、Gridview中的内容导出到Excel
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。