How To Find Controls Inside MasterPage ContentPlaceHolder Of ASP.Net Page

In MasterPage i added a label and One ContentPlaceHolder, This is My MasterPage code snippet to demonstrate 

<form id="form1" runat="server"&gt

   <div><asp:Label ID="lblUN" runat="server"Text="Raji">asp:Label>div>

<asp:ContentPlaceHolder ID="ContentPlaceHolder1"runat="server">

      asp:ContentPlaceHolder>

</form>

»I added a TextBox inside ContentPlaceHolder of Asp.Net page that uses a master Page.

<asp:Content ID="Content1"ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server" >

    <asp:TextBox ID="txtUName" runat="server"Text="Raji">asp:TextBox>

   

&lt/asp:Content>

»To find the 'Label' controls of Master page just add the following line in CodeBehind(.cs) page

Label l = Master.FindControl("lblUN") as Label;

How To Find The Controls In a Page

»To find the controls in page just use the following code snippet

TextBox TB= Master.FindControl("ContentPlaceHolder1").FindControl("txtUName")as TextBox;

Happy Coding