C# 如何从用户控件访问页面控件？
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How to access page controls from user control?
提问by Anyname Donotcare
Is there a way to access page controls from user control . I have some controls in my page and i want to access these controls from the user control .
有没有办法从用户控件访问页面控件。我的页面中有一些控件，我想从用户控件访问这些控件。
采纳答案by Pankaj
YourControlType ltMetaTags = null;
Control ctl = this.Parent;
while (true)
{
ltMetaTags = (ControlType)ctl.FindControl("ControlName");
if (ltMetaTags == null)
{
ctl = ctl.Parent;
if(ctl.Parent == null)
{
return;
}
continue;
}
break;
}
Example
例子
System.Web.UI.WebControls.Literal ltMetaTags = null;
Control ctl = this.Parent;
while (true)
{
ltMetaTags = (System.Web.UI.WebControls.Literal)ctl.FindControl("ltMetaTags");
if (ltMetaTags == null)
{
if(ctl.Parent == null)
{
return;
}
ctl = ctl.Parent;
continue;
}
break;
}
回答by Kunal Shah
Parent.FindControl("hdnValue")
回答by Chris Gessler
There are actually several ways to accomplish this:
实际上有几种方法可以实现这一点：
Create a public property in your user control
在您的用户控件中创建一个公共属性
public Button PageButton { get; set; }
Then assign it in the page's OnInit or OnLoad method
然后在页面的 OnInit 或 OnLoad 方法中赋值
myUserControl.PageButton = myPageButton;
You can make the control public and unbox Page:
您可以将控件设为公开并取消装箱页面：
public Button PageButton { get { return this.myPageButton; } }
In the user control:
在用户控件中：
MyPage myPage = (MyPage)this.Page;
myPage.PageButton.Text = "Hello";
The slowest, but easiest way would be to use FindControl:
最慢但最简单的方法是使用 FindControl：
this.Page.FindControl("myPageButton");
回答by Jignesh Rajput
its work for me :
它对我的工作：
I declare Label in My .aspxpage
我在我的.aspx页面中声明标签
<asp:Label ID="lblpage" runat="server" Text="this is my page"></asp:Label>
<asp:Panel ID="pnlUC" runat="server"></asp:Panel>
In .aspx.csI have add UserControl through Panel
在.aspx.cs我通过添加 UserControlPanel
UserControl objControl = (UserControl)Page.LoadControl("~/ts1.ascx");
pnlUC.Controls.Add(objControl);
and access from in .ascxUserControl like this :
并从.ascxUserControl 中访问，如下所示：
Page page = this.Page;
Label lbl = page.FindControl("lblpage") as Label;
string textval = lbl.Text;
