UserControl：FindControl无法找到内部控件 [英] UserControl: FindControl cannot find the inner control

问题描述

如果用户控件带有文本框。我在aspx页面上实例化这个用户控件。



现在页面加载事件如下所示：

If have a user control with a textbox. I instantiate this usercontrol on an aspx page.

Now the page load event looks like this:

protected void Page_Load(object sender, EventArgs e)
       {
           TrialControl tc = new TrialControl(); //This is my Usercontrol

           Label labelUctext = (Label)(tc.FindControl("labelText1"));
           if (labelUctext != null)
           {
               if (labelUctext.Text != String.Empty)
               {
                   labelText.Text = labelUctext.Text;
               }
           }
       }

这里labelUctext始终保持NULL。因此它无法找到内部标签。非常基本的问题，但我做错了什么？

Here labelUctext always holds NULL. thus it is not able to find the inner label. Extremely basic question, but what am I doing wrong?

推荐答案

将此方法添加到您的usercontrol.cs并调用此方法

喜欢这个

string str = usercontrol.AddProperty;

add this method into your usercontrol.cs and call this method
like this
string str=usercontrol.AddProperty;

public string AddProperty
    {
        get
        {
            return labelText1.Text;
        }
        set
        {
            labelText1.Text = value;
        }
    }

foreach（grdroomavail.Rows中的GridViewRow gr）

{

（Literal）tt =（（Literal）gr.FindControl（ltrroom）as Literal）.Text

}

foreach (GridViewRow gr in grdroomavail.Rows)
{
(Literal)tt=((Literal)gr.FindControl("ltrroom") as Literal).Text
}

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