本文介绍了GridView 必须放在带有 runat=“server"的表单标签内.即使在 GridView 位于表单标签内之后的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
<form runat="server" id="f1">
<div runat="server" id="d">
grid view:
<asp:GridView runat="server" ID="g">
</asp:GridView>
</div>
<asp:TextBox runat="server" ID="t" TextMode="MultiLine" Rows="20" Columns="50"></asp:TextBox>
</form>
后面的代码:
public partial class ScriptTest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
g.DataSource = new string[] { "a", "b", "c" };
g.DataBind();
TextWriter tw = new StringWriter();
HtmlTextWriter h = new HtmlTextWriter(tw);
d.RenderControl(h);
t.Text = tw.ToString();
}
}
即使 GridView 位于带有 runat="server" 的 from 标记内,我仍然收到此错误.
Even the GridView is within a from tag with runat="server", still I am getting this error.
请问有什么线索吗?
推荐答案
您正在调用 GridView.RenderControl(htmlTextWriter)
,因此页面引发了一个异常,即 Server-Control 在形式.
You are calling GridView.RenderControl(htmlTextWriter)
, hence the page raises an exception that a Server-Control was rendered outside of a Form.
您可以通过覆盖 VerifyRenderingInServerForm 来避免这种情况
public override void VerifyRenderingInServerForm(Control control)
{
/* Confirms that an HtmlForm control is rendered for the specified ASP.NET
server control at run time. */
}
请参阅此处和这里.
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