今天看了老赵的文章可是怎么都调试不通过。

复制代码 代码如下:
[AjaxPro.AjaxMethod]
public string gethtml()
{
UcViewHelper<UserControl> viewManager = new UcViewHelper<UserControl>();
UserControl control = viewManager.LoadViewControl("~/uc/giftoutmodel.ascx");
string s=viewManager.RenderView(control);
return s;
}
public class UcViewHelper<T> where T : UserControl
{
private MyPage m_pageHolder;
public T LoadViewControl(string path)
{
m_pageHolder = new MyPage();
return (T)m_pageHolder.LoadControl(path);
}
public string RenderView(T control)
{
StringWriter output = new StringWriter();
this.m_pageHolder.Controls.Add(control);
HttpContext.Current.Server.Execute(this.m_pageHolder, output, false);
return output.ToString();
}
}
class MyPage : Page
{
public override void VerifyRenderingInServerForm(Control control)
{
//if (control is GridView || control is UserControl)
//{
// return;
//}
//base.VerifyRenderingInServerForm(control);
}
}

测试通过。

如果：

复制代码 代码如下:
[AjaxPro.AjaxMethod]
public string gethtml()
{
string s = getString();
return s;
}
public string getString()
{
UserControl control = LoadControl("~/uc/giftoutmodel.ascx") as UserControl;
StringWriter tw = new StringWriter();
HtmlTextWriter writer = new HtmlTextWriter(tw);
control.RenderControl(writer);
return writer.InnerWriter.ToString();
}
public override void VerifyRenderingInServerForm(Control control)
{
// if (control is GridView || control is UserControl)
// {
// return;
//}
//base.VerifyRenderingInServerForm(control);
}

究其原因，原来是老赵的代码 继承了Page 然后使用VerifyRenderingInServerForm验证，二我的代码没有继承Page直接使用VerifyRenderingInServerForm 所以会造成