ASP.NET：用户控制访问到它包装的控件 [英] ASP.NET: User control with access to the controls that it wraps

问题描述

我有一堆这样的样板code的出现在我的ASP.NET项目。

I have a bunch of occurrences of this kind of boilerplate code in my ASP.NET project.

<div class="inputfield">
  <div class="tl">
    <span class="tr"><!-- --></span>
    <span class="ll"><!-- --></span>
    <div class="lr">
      <div class="cntnt">
        <asp:TextBox .../>
      </div>
    </div>
  </div>
</div>

正如你可能已经猜到了，一切都在这片段是除了最里面的文本字段纯样板。

As you may have guessed, everything in that snippet is pure boilerplate except for the innermost text field.

什么是避免这种ASP.NET样板的最好方法？在如Django的我会做一个自定义标签吧，因为这样：

What is the best way to avoid such boilerplate in ASP.NET? In e.g. Django I would make a custom tag for it, as such:

{% boiler %}
<input ... />
{% endboiler %}

我在想，也许我可以创建一个用户的控制，但我已经找到了ASP.NET的用户控件的所有教程是非常简单和自闭，即他们不知道的内容标签。我需要沿着线的东西：

I was thinking that maybe I can create a user control, but all the tutorials on ASP.NET user controls that I've found are very simplistic and "self-closing", i.e. they are not aware of the contents of the tag. I need something along the lines of:

<Hello:MyControl>
  <asp:TextBox .../>
</Hello>

所以我的问题是：什么是避免了样板的最好办法

So my question is the following: what's the best way to avoid the boilerplate?

推荐答案

您可以使用的ITemplate属性。因此，你可以注入在不同情况下不同的内容。

You can use an ITemplate property. Thus, you can inject different content in different situations.

[PersistChildren(false), ParseChildren(true, "ContentTemplate")]
public partial class WebUserControl1 : System.Web.UI.UserControl
{

    [System.ComponentModel.Browsable(false), System.Web.UI.PersistenceMode(PersistenceMode.InnerProperty)]
    public ITemplate ContentTemplate { get; set; }

    protected override void CreateChildControls()
    {
        if (this.ContentTemplate != null)
            this.ContentTemplate.InstantiateIn(this);

        base.CreateChildControls();
    }
}

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