所以，我研究了您的网站，我的情况很独特。我有一个 Web 控件 .ascx，上面有一个 gridview，代码如下所示:
<body>
<div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" AllowPaging="true"
OnPageIndexChanging="GridView1_PageIndexChanging" PageSize="10">
<Columns>
<asp:BoundField DataField="fb_login" HeaderText="User Id" runat="server" />
<asp:BoundField DataField="fb_url" HeaderText="URL___" />
<asp:BoundField DataField="fb_response" HeaderText="Answer: Did you find what you were looking for?" />
<asp:BoundField DataField="fb_noResponse" HeaderText="No Response or Ignore" />
<asp:BoundField DataField="fb_date" HeaderText="Date" />
<asp:BoundField DataField="fb_serviceCall" HeaderText="Prevented Service Call" />
<asp:BoundField DataField="fb_partsShipment" HeaderText="Prevented Parts Shipment" />
<asp:BoundField DataField="fb_warranty" HeaderText="Under Warranty" />
<asp:BoundField DataField="fb_cancel" HeaderText="Cancelled" />
<asp:BoundField DataField="fb_none" HeaderText="None of the Above" />
</Columns>
</asp:GridView>
<asp:Button ID="download" Text=" Download to Excel " OnClick="dwnLoad" runat="server" />
</div>
我有一个执行以下代码的下载到 Excel 按钮:
protected void dwnLoad(object sender, EventArgs e)
{
Response.Clear();
Response.AddHeader("content-disposition", "attachment; filename=kbNotification.xls");
Response.Charset = "";
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.ContentType = "application/vnd.xls";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWrite);
GridView1.RenderControl(htmlWriter);
Response.End();
}
当我按下按钮时，出现以下错误:
Exception Details: System.Web.HttpException: Control 'pagecontent_0_GridView1' of type 'GridView' must be placed inside a form tag with runat=server.
Source Error:
Line 54: Response.Cache.SetCacheability(HttpCacheability.NoCache);
Line 55: Response.ContentType = "application/vnd.xls";
Line 56: System.IO.StringWriter stringWrite = new System.IO.StringWriter();
Line 57: System.Web.UI.HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWrite);
Line 58: GridView1.RenderControl(htmlWriter);
Source File: C:\Projects\MEAU\trunk\Code\MEAU.Web\Components\SupportCenter\KB_Notification_rpt.ascx.cs Line: 56
我尝试将以下方法添加到代码隐藏中:
public override void VerifyRenderingInServerForm(Control control)
{
return;
}
这是行不通的，因为这是一个 .ascx 页面，所以我也尝试将它添加到我的 default.aspx 页面中……但仍然遇到无法找到覆盖方法的错误。
如果您能发现任何不正确的地方，请提供帮助，我们将不胜感激。 问候，
最佳答案
protected void Page_Load(object sender, EventArgs e)
{
btnExcel_Click +=................
if (!IsPostBack)
{
BindGridview();
}
}
protected void BindGridview()
{
gvdetails.DataSourceID = "dsdetails";
}
public override void VerifyRenderingInServerForm(Control control)
{
/* Verifies that the control is rendered */
}
protected void btnExcel_Click(object sender, ImageClickEventArgs e)
{
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "Customers.xls"));
Response.ContentType = "application/ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
gvdetails.AllowPaging = false;
BindGridview();
//Change the Header Row back to white color
gvdetails.HeaderRow.Style.Add("background-color", "#FFFFFF");
//Applying stlye to gridview header cells
for (int i = 0; i < gvdetails.HeaderRow.Cells.Count; i++)
{
gvdetails.HeaderRow.Cells[i].Style.Add("background-color", "#df5015");
}
gvdetails.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();
}
使用此代码从 gridView 下载数据到 excel。
关于c# - 'GridView' 必须放在带有 runat=server 的表单标签内。，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17305359/