Access Master Page Control - asp.net

Question

I am using a UserControl Which is present in the Master Page. I need to access a Master page control in the UserControl. I need your suggestions.
The Scenario is A label is present in the Master Page. Based upon selections in the usercontrol i need to modify the masterpage label. The UserControl is present in the Master page itself not in the content place holder.

Answer 1

Create a public method (or public property) in the master page to modify your label and in the UserControl you are able to call it, through the Page.master object:
YourMasterPageClass master = Page.master as YourMasterPageClass;
if(master != null)
{
master.YourEditMethod("hello");
}

Answer 2

Quick and Easy way is to create event in control and handle in master like this:
//Control aspx
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="TestControl.ascx.cs"
Inherits="TestControl" %>
<div style="width:300px;border:2px groove blue;">
<asp:Button ID="btn1" runat="server" Text="One" onclick="btn_Click" />
<asp:Button ID="btn2" runat="server" Text="Two" onclick="btn_Click" />
<asp:Button ID="btn3" runat="server" Text="Three" onclick="btn_Click" />
<asp:Button ID="btn4" runat="server" Text="Four" onclick="btn_Click" />
</div>
//Control C#
namespace Controls
{
public partial class TestControl : System.Web.UI.UserControl
{
public delegate void UserChoice(TestEventArgs e);
public event UserChoice OnUserChoice;
protected void btn_Click(object sender, EventArgs e)
{
if (OnUserChoice != null)
OnUserChoice(new TestEventArgs(((Button)sender).Text));
}
}
public class TestEventArgs : EventArgs
{
private string _value;
public TestEventArgs(string str)
{
_value = str;
}
public string Message
{
get { return _value; }
}
}
}
//MasterPage Code
protected void Page_Load(object sender, EventArgs e)
{
test1.OnUserChoice += new
Controls.TestControl.UserChoice(test1_OnUserChoice);
}
void test1_OnUserChoice(ROMS.Intranet.Controls.TestEventArgs e)
{
MasterLabel.Text = e.Message;
}
MasterLabel is name of the label in master page.
test1 is the control in master page.