Finding a user control from the main parent page

Question

HI I have an aspx page ResourceCategories.aspx where in I have registered two user controls:

My problem is I have to access the user control 2)downloadPopUp in 1)ctlCategories on btn click event.

 protected void btnArrow_Click(object sender, EventArgs e) 

      {

            //lblMessages.Text = String.Empty;
            try
            {
          var userControl = FindControl("ctlPopUp") as UserControl;


            }
            catch (Exception ex)
           {
           }
      }

I'm still getting the usercontrol value as null. How it can be accessed? I'm able to access only of I register 2nd user control in first user control but not from the main aspx page.ie; Registering in ResourceCenter.ascx. I dont want to nest user control inside another user control.. is there a way ?

Answer 1

With this code you don't need to use FindControl , since you have only a single categoryPopup directly on your page, declared using runat="server" :

<downloadPopUp:categoryPopup id="ctlPopUp" runat="server"></downloadPopUp:categoryPopup>

Therefore in your code you can use ctlPopup directly to access the control.