Can't find the button....

[wsyeager]

I'm trying to get an instance of a Delete button on my webform in order to display a warning msg to the user. I've done this type of thing several times for a button inside a datagrid for a user confirm to delete a particular record. this webform has no datagrid. Simply a delete button. However, the form is set up as having multiple placeholder controls depending upon which functionality is initially selected.

 

The following is the html within my webform:

 

<asp:Button id="btnDelete" Text="Delete" runat="server" class="eppbutton"/>

 

The following info is in my code-behind:

 

ElseIf Request.QueryString.Item("iManage") = 3 Then 'Delete
           plcAddFile.Visible = False
           plcAddFolder.Visible = False
           plcDelete.Visible = True
           plcEdit.Visible = False
           plcPublish.Visible = False
           plcCustomize.Visible = False
           plcContact.Visible = False
           'Set up a delete confirmation
           Dim btnDeleteFilefolder As Button
           btnDeleteFilefolder = DirectCast(Me.FindControl("btnDelete"), Button)
           btnDeleteFilefolder.Attributes.Add("onclick", "return getdelconfirm();")

 

While debugging, I get the following instance of the Delete button from within the Auto window:

 

- btnDelete {Text = "Delete"} System.Web.UI.WebControls.Button

 

As you can see, the ID of the button is availabile.

 

I'm getting an "Object not set to an instance of an object" on the boldfaced line of code above.

 

What am I doing wrong here where I can't get an instance of this object?

Edited January 2, 2006 by PlausiblyDamp

[mark007]

You just need to declare the button:

 

Protected btnDelete as Button

 

within your code behind then refer to btnDelete. If you are using Visual Studio.Net then this will be doen automatically.

[wsyeager]

I added a recursive "FindControl" method since the butoon is inside of a placeholder control.

 

This did the trick just fine.