动态加载用户控件

Question

I'm trying to load a user control in a web service, but it doesn't execute the Load_Page().

I tried to use:

HttpContext.Current.Server.Execute(page, text, false);

But it returns a NullException. It is my code:

public string Controle(string url)
    {
        Page page = new Page();
        UserControl userControl = (UserControl)page.LoadControl(url);
        //userControl.EnableViewState = false;
        HtmlForm form = new HtmlForm();
        form.Controls.Add(userControl);
        page.Controls.Add(form);
        StringWriter text = new StringWriter();
        HtmlTextWriter htmltext = new HtmlTextWriter(text);
        userControl.RenderControl(htmltext);
        return text.ToString();
    }

Hope it is clear.

Answer 1

You need to initialize the control using a method that does something like

this.Load += Page_Load;

Please refer to this post which explains exactly what needs to be done to achieve this. Be sure to read the section stating; " One word of caution: " http://weblogs.asp.net/srkirkland/archive/2007/11/05/dynamically-render-a-web-user-control.aspx This related post will also be able to assist: Page_Load not firing in UserControl