Calling a function on change. Little help ;)

[Mesk69]

I'm having a problem with an aspx. I'm just learning how to use aspx and I can't seem to find my problem. In my page I have the following function and I call it with the statement that follows.

I'm looking at alternate ways to fix this. If the problem is obvious I'd appreciate the help.

Thanks for taking the time to read ;P

Frank



private sub DisplayCourse(sender As Object, e As System.EventArgs)
BindData("Maurice, Lafleur&quot
end sub

<asp:dropdownlist id=&quot;ddlTeacher&quot; runat=&quot;server&quot; DataTextField=&quot;name&quot; DataValueField=&quot;t_no&quot; OnSelectedIndexChanged=&quot;DisplayCourse&quot;>
</asp:dropdownlist>
<asp:datagrid id=&quot;dgCourseWorkload&quot; OnItemDataBound=&quot;dgCourseWorkload_ItemDataBound&quot; OnDeleteCommand=&quot;dgCourseWorkload_Delete&quot; OnCancelCommand=&quot;dgCourseWorkload_Cancel&quot; OnUpdateCommand=&quot;dgCourseWorkload_Update&quot; OnEditCommand=&quot;dgCourseWorkload_Edit&quot; EditItemStyle-BackColor=&quot;#eeeeee&quot; EditItemStyle-Font-Size=&quot;12px&quot; ItemStyle-Font-Size=&quot;12px&quot; HeaderStyle-Font-Size=&quot;14px&quot; HeaderStyle-Font-Bold=&quot;True&quot; HeaderStyle-HorizontalAlign=&quot;Center&quot; HeaderStyle-ForeColor=&quot;White&quot; HeaderStyle-BackColor=&quot;Black&quot; CellPadding=&quot;4&quot; AutoGenerateColumns=&quot;False&quot; DataKeyField=&quot;CourseCode&quot; Runat=&quot;server&quot;>

 

[Zarcom]

Couple questions for you.

Are you using code behind or spaggetti style coding.

If your using code behind make sure to set autopostback to true. Add the line Handles ddlTeacher.SelectedIndexChanged to the end of your sub name line (forgotten proper term) like so


private sub DisplayCourse(sender As Object, e As System.EventArgs) Handles ddlTeacher.SelectedIndexChanged



If your using spaggetti code make sure that the sub is within the server code tags <%...%>.

I do advise using code behind. There have been a few threads here you can find on the advantages and disadvantages of both methods. Conclusion is always to use code behind if at all possible. That'l do donkey, that'l do
Mark
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