将ASP.NET用户控件的元素公开给父级所有者 [英] Make a ASP.NET user control's element public to the parent holder

问题描述

嗨！

假设我有一个名为LabelHolder的用户控件.其中有一个像这样的标签:

Hi!

Let''s say I have a usercontrol called LabelHolder. Within that I have a label like this:

<asp:Label ID="lbCan" runat="server" Text=""></asp:Label>

在保存该用户控件的页面(请说Deafult.aspx)中，如何(不使用FindControl方法，因为效率低下)如何从Default.aspx.cs文件中设置标签文本属性

所以我希望我有这样的东西:

In a page that holds that user control (lets say Deafult.aspx) how do I (without using the FindControl method, as it is inefficient) get to set the label text property from the Default.aspx.cs file

So what I wish for i something like:

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        LabelHolder lH = new LabelHolder();
        lH.lbCan.Text = "foo"; //This is what I wish would work but it doesn't
        form1.Controls.Add(lH);

    }
}

非常感谢任何提示！

谢谢

Very greatful for any tips!

Thanks

推荐答案

您可以将访问器属性添加到LabelHolder控件中，以为您完成此操作.

You could add an accessor property to your LabelHolder control to do it for you.

public class LabelHolder
{
....

  public string Text
  {
    get
    {
      return lbCan.Text;
    }
    set
    {
      lbCan.Text = value;
    }
  }
}

这样您的代码就变成了

so your code becomes

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        LabelHolder lH = new LabelHolder();
        lh.Text = "foo"; 
        form1.Controls.Add(lH);

    }
}

在用户控件中创建属性:


公共字符串名称
{
设置{lbCan.Text = value; }
得到{return lbCan.Text; }
}


在Default.aspx页中，只需为该属性分配一个值.

ucTest.Name ="hasan";

Create a Property in the user control:


public string Name
{
set { lbCan.Text = value; }
get { return lbCan.Text; }
}


In the the Default.aspx page just assign a value to that property.

ucTest.Name = "hasan";

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