查找页面中用户控件中存在的控件，包括母版页 [英] Find controls present in user control in a page, that includes master page

问题描述

我无法访问包含母版页的页面中的用户控件中的控件。



我有一个主页A.Master

我有一个包含母版页的A.aspx页面

在A.aspx中我有一个名为Save&的按钮。一些用户控件，如myusercontrol1，myusercontrol2等...



当我点击保存按钮时，我需要访问该用户控件中的控件。得到的价值。



我尝试过：



i在web.config文件中注册了这些用​​户控件。

i解除了保存按钮&的点击事件。编写以下代码

myusercontrol1 obj = new myusercontrol1（）

Gridview grvuserdetails =（Gdidview）obj.findcontrol（GridView1）。



但是价值在obj& grvuserdetails变为null。

解决方案

查找控件| ASP.NET论坛 [ ^ ]

HI Arya

如果你试图在<$ c $中找到控件 c>空对象（新实例）然后您将只获得 null 。

  myusercontrol1 obj =  new  myusercontrol1（） 

而不是，使用用户控件名称（在 aspx 文件中定义）

例如：if控件名称是 userControl1 然后代码就像

 Gridview grvuserdetails =（Gdidview）useControl1.findcontrol（   GridView1）

 ContentPlaceHolder CP =（ContentPlaceHolder） this  .Page.Master.FindControl（  ContentPlaceHolder1）; 
 UserControl userControl =（UserControl）CP.FindControl（  useControl1）; 
 Gridview grvuserdetails =（Gridview）userControl.FindControl（  GridView1）; 

I cant't access the Controls Present In A User Control In A Page Which Includes Master Page.

I Have A Masterpage A.Master
I Have A Page A.aspx which include masterpage
In A.aspx i have a button named Save & Some Usercontrols like myusercontrol1,myusercontrol2 etc...

I need that when i click the save button i want to access the controls present in that user controls & get the value present in.

What I have tried:

i registered those usercontrols in web.config file.
i fired the click event of save button & write the following code
myusercontrol1 obj = new myusercontrol1()
Gridview grvuserdetails=(Gdidview)obj.findcontrol("GridView1").

But The Value In obj & grvuserdetails becomes null.

解决方案

Finding controls | The ASP.NET Forums[^]

HI Arya
if you try to find the control in an empty object (new instance) then you will get null only.

myusercontrol1 obj = new myusercontrol1()

instead, use the user control Name (which is defined in the aspx file )
eg: if the control name is userControl1 then the code wil be like

Gridview grvuserdetails=(Gdidview)useControl1.findcontrol("GridView1")

ContentPlaceHolder CP = (ContentPlaceHolder)this.Page.Master.FindControl("ContentPlaceHolder1");
UserControl userControl= (UserControl )CP.FindControl("useControl1");
Gridview grvuserdetails= (Gridview)userControl.FindControl("GridView1");

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