[Resolved] DropDownList property

Is there a porperty for the DropDownList that will allow code to be executed as soon as I select from the list without having to use a command button. I've tried using the SelectedIndexchanging and SelectedIndexChanged. Once user selects from list I need to programatically fill another DropDownList. Thank you.

Change the AutoPostBack to be true and use the SelectedIndexChanged

I have set the DropDownList property AutoPostBack = True and added

Code:

---

Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged

        ValidateInput()
        If myError = False Then
            BuildConnectString()
            OpenConnection()
            FillDropDownList()
            CloseConnection()
        End If

    End Sub

---

Program does not hit the sub unless I use and click a button.

what happens when you step through the code.. is myError set to true?

When I select from DropDownList nothing happens. If I add a Button and click the button after selecting from DropDownList, then it hits the sub.

Got it working as you said. My fault setting AutoPost = True on wrong DropDownList. Sorry, thank you for your help.

You may also want to look at the CascadingDropDown controls in ASP.NET AJAX to avoid a postback