与服务器控件的页面使用LoadControl [英] Using LoadControl on pages with server controls

问题描述

我试图创造，我可以作为邮件发送的用户控件模板。

I'm trying to create a user control template that I can send as email.

在一个工具类我有一个包含此code的方法：

In a utility class I have a method that contains this code:

StringBuilder sb = new StringBuilder();
Page p = new Page();
UserControl ctrl = (UserControl)p.LoadControl("~/EmailTemplates/OrderConfirmation.ascx");
StringWriter sw = new StringWriter(sb);
Html32TextWriter htw = new Html32TextWriter(sw);

ctrl.RenderControl(htw);

这正确写入用户控件的文字，但如果我想使用一个服务器控件，如控制页面内的一个列表视图，列表视图不会求。似乎只有直列code块进行评估。我怎样才能解决这个得到什么？

This correctly writes the user controls text, but if I want to use a server control such as a listview inside of the controls page, the listview is never evaluated. It seems that only inline code blocks are evaluated. How can I get around this?

推荐答案

您实际上应该将控件添加到一个页面，执行该页面：

You should actually add the control to a page and execute the page:

    var page = new FormlessPage();
    var ctrl = (UserControl)page.LoadControl("~/EmailTemplates/OrderConfirmation.ascx");

    page.Controls.Add(ctl);
    StringWriter writer = new StringWriter();
    HttpContext.Current.Server.Execute(page, writer, false);
    return writer.ToString();

无形页只是看起来像：

Formless page simply looks like:

public class FormlessPage : Page
{
    public override void VerifyRenderingInServerForm(Control control)
    {
    }
}

它可以让你的控制有没有输入元素的＆LT;形式的方式＆gt; 包装

此方法将调用你的页面生命周期方法，并很好地结合你的表单元素。

This method will call your page lifecycle methods and bind up your form elements nicely.

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