Question

I can’t seem to find a control in a login view.

The aspx is:

<asp:LoginView ID='SuperUserLV' runat='server'>     <RoleGroups>             <asp:RoleGroup Roles='SuperUser'>                     <ContentTemplate>                                    <asp:CheckBox ID='Active' runat='server' /><br />                             <asp:CheckBox ID='RequireValidaton' runat='server' />             </ContentTemplate>         </asp:RoleGroup>     </RoleGroups> </asp:LoginView>  

And the code behind is:

if (Context.User.IsInRole('SuperUser')) {     CheckBox active = (CheckBox) SuperUserLV.FindControl('Active');     if (active != null)     {         active.Checked = this.databaseObject.Active;     }      CheckBox require = (CheckBox) SuperUserLV.FindControl('RequireValidaton');     if (require != null)     {         require.Checked = this.databaseObject.RequiresValidation;     } } 

With a user in the right role, I can see the checkboxes, but the code behind doesn’t populate them, the result of the findcontrol is null.

What am I missing? Thanks.

Edit: Looks like my issue was when I am doing the .FindControl the loginview hasn’t rendered to the screen and is returning null. Putting my code on a button and calling it after the page has rendered to the screen it works as I would expect.

Edit 2: Seems the best place to put the code was SuperUserLV_ViewChanged

Answer 1

The built-in FindControl method only searches the direct child controls. You’ll need to write a recursive version of the method to search all descendants. Following is an untested example that likely needs some optimization:

public Control RecursiveFindControl(Control parent, string idToFind) {     for each (Control child in parent.ChildControls)     {         if (child.ID == idToFind)         {             return child;         }         else         {             Control control = RecursiveFindControl(child, idToFind);             if (control != null)             {                 return control;             }         }     }     return null; }