asked on

autopostback does not fire when used in a usercontrol

i have a dropdownlist which has the autopostback=true. i can't get it to fire because it is in a usercontrol which goes on a master page. how can i get this to work?

<asp:DropDownList ID="categorylist" runat="server" CssClass="body-categorylist-text" AutoPostBack="true" Width="110" Height="16" />

NauticalNonsense

I just tried this on a test page... control is:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Test.ascx.cs" Inherits="Controls_Test" %>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True">
<asp:ListItem Value="1">1</asp:ListItem>
<asp:ListItem Value="2">2</asp:ListItem>
<asp:ListItem Value="3">3</asp:ListItem>
</asp:DropDownList>
Master Page is:
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs"
Inherits="MasterPages_Default_MasterPage" %>
<%@ Register TagPrefix="site" TagName="test" Src="~/Controls/Test.ascx" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
</head>
<body marginwidth="0" marginheight="0" topmargin="0" leftmargin="0" vlink="#000066"
link="#000066">
<form id="form1" runat="server">
<site:test runat="server" ID="aaa" />
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</form>
</body>
</html>

1.) are you sure it's NOT posting back? locally, it might be too quick
2.) you have the user control call inside your <form> tag?
3.) are you programmatically registering/loading this control?

NauticalNonsense

btw, on my test, it worked fine doing the postback.

kumar_jac

hi,
I checked that everything worked fine.

may be check you the Autopostback property again. And it may be modified in code to false

attipa

ASKER

i have tried everything and it doesn't work. here is my code.

usercontrol
<%@ Control Language="VB" AutoEventWireup="true" CodeFile="category-navigation.ascx.vb" Inherits="UserControls_category_navigation" %>
<asp:DropDownList ID="categorylist" runat="server" CssClass="body-categorylist-text" AutoPostBack="true" Width="110" Height="16" />

usercontrol codebehind
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
getcats()
End Sub
Public Function getcats()

Dim connection As New SqlConnection(connectionString)

Try
connection.Open()
Dim command As SqlCommand = New SqlCommand("GetCategoriesWO7", connection)
command.CommandType = CommandType.StoredProcedure
Dim adapter As SqlDataAdapter = New SqlDataAdapter(command)
adapter.Fill(CatDS, "Category")

categorylist.DataSource = CatDS
categorylist.DataTextField = "Name"
categorylist.DataValueField = "CategoryID"
categorylist.DataBind()

categorylist.Items.Insert(0, "Categories")

Catch e As Exception

Finally
connection.Close()
End Try

Return Nothing
End Function
Protected Sub categorylist_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles categorylist.SelectedIndexChanged
If Not categorylist.SelectedIndex = 0 Then
Response.Redirect("http://www.xxx.com/new_xxa/" & TextForLinks(categorylist.SelectedItem.ToString()) & "/" & categorylist.SelectedValue & ".aspx")
End If
End Sub

master page
<%@ Page Language="VB" AutoEventWireup="true" CodeFile="about.aspx.vb" Inherits="about" %>
<%@ Register Src="UserControls/category-navigation.ascx" TagName="categorynavigation" TagPrefix="uc3" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
</head>
<body class="default-body">
<uc3:categorynavigation ID="Categorynavigation1" runat="server" />
</body>
</html>

i even got this error message a few times:
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

i even put enableEventValidation=true in my web.config....still no luck.

someone please help me, i am in a huge rush to finish this project.

ASKER CERTIFIED SOLUTION

NauticalNonsense

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attipa

ASKER

setting the EnableEventValidation=True in the Page Directive did it! thanks.

NauticalNonsense

Happy to be of service :)

NauticalNonsense

By the way, for the record, do you NOT have a <FORM tag on your master page? I was thinking that it would be the form tag, ... however....

attipa

ASKER

yes i do