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Hi all

I am having a 3 textbox in my webform inside the master page . when text changed of 2nd or 3rd or 1st happens one usercontrol will open which contains one button.When i click the button in user control ,the respective text changed text box should be focused. I tried the following code

In UserControl
public event EventHandler ButtonClickDemo;
C#
protected void imgPopupClose_Click(object sender, EventArgs e)
   {
       ButtonClickDemo(sender, e);
   }

In Web Page

In page
popMsg.ButtonClickDemo += new EventHandler(Demo1_ButtonClickDemo);
here popMsg is usercontrol

protected void Password_TextChanged(object sender, EventArgs e)
{
Session["s"] = "Password.ID;
popMsg.Message = "Please enter valid password";
popMsg.ShowPopUp();
}
C#
protected void Demo1_ButtonClickDemo(object sender, EventArgs e)
    {
        string s = Session["s"].ToString();
        this.FindControl(s).Focus();//here am getting error as object reference not set to instance of the object

    }
Posted

From UserControl you can find control from Page using
this.Page.FindControl("controlName")

And from master page you can find control using
C#
this.Page.Master.FindControl("controlName")
 
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This will work only when if master page is not used....


One of my friend got the solution....


protected void Demo1_ButtonClickDemo(object sender, EventArgs e)
{
string s = Session["s"].ToString();


MasterPage ctl00 = FindControl("ctl00") as MasterPage; // Get a reference to the ContentPlaceHolder
ContentPlaceHolder MainContent = ctl00.FindControl("MainContent") as ContentPlaceHolder;



MainContent.FindControl(s).Focus();

}
 
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