jQuery RegisterForEventValidation 只能在 Render 期间调用
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RegisterForEventValidation can only be called during Render
提问by Amit
I have a webmethod which will be called from jquery ajax:
我有一个将从 jquery ajax 调用的 webmethod：
[WebMethod]
public string TestMethod(string param1, string param2)
{
StringBuilder b = new StringBuilder();
HtmlTextWriter h = new HtmlTextWriter(new StringWriter(b));
this.LoadControl("~/Pages/Controls/Listing.ascx").RenderControl(h);
string controlAsString = b.ToString();
return controlAsString;
}
(it's a non-static method and we are able to hit it. That's not an issue)
（这是一个非静态方法，我们能够命中它。这不是问题）
When the loadControl() method is executed, I get an error saying: RegisterForEventValidation can only be called during Render.
执行 loadControl() 方法时，我收到一条错误消息：RegisterForEventValidation 只能在渲染期间调用。
I have already included EnableEventValidation="false" for the current aspx, disabled viewstate also. but still i get the same error. Any ideas on this?
我已经为当前的 aspx 包含了 EnableEventValidation="false"，也禁用了视图状态。但我仍然遇到同样的错误。对此有何想法？
回答by Syed Mohamed
Solution is to disable the Page's Event Validation as <%@ Page ............ EnableEventValidation="false" %>
解决方案是禁用页面的事件验证作为 <%@ Page ............ EnableEventValidation="false" %>
and Override VerifyRenderingInServerForm by adding following method in your C# code behind
并通过在后面的 C# 代码中添加以下方法来覆盖 VerifyRenderingInServerForm
public override void VerifyRenderingInServerForm(Control control)
{
/* Confirms that an HtmlForm control is rendered for the specified ASP.NET
server control at run time. */
}
Refer the Below Link
http://www.codeproject.com/Questions/45450/RegisterForEventValidation-can-only-be-called-duri
请参阅以下链接
http://www.codeproject.com/Questions/45450/RegisterForEventValidation-can-only-be-called-duri
回答by KMX
As per Brian's second link, without hopping further, just do this:
根据布赖恩的第二个链接，无需进一步跳转，只需执行以下操作：
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
Html32TextWriter hw = new Html32TextWriter(sw);
Page page = new Page();
HtmlForm f = new HtmlForm();
page.Controls.Add(f);
f.Controls.Add(ctrl);
// ctrl.RenderControl(hw);
// above line will raise "RegisterForEventValidation can only be called during Render();"
HttpContext.Current.Server.Execute(page, sw, true);
Response.Write(sb);
