RadListView Ajax Button not Working When Filtered by RadComboBox

[Daniel]

hello
i have 4 main control, a radcombobox, radlistview with a asp button, and a label, i want to filter radlistview data by radcombobox selected value,( i do it without  problem), and after click on asp button in radlistview, that return datakey with button commandargument value to label, but my problem is after click on asp button, label show nothing.
RadComboBox code:
aspx:

<telerik:RadComboBox ID="CityDDL" runat="server"
     AutoPostBack="true" Label="City :" Skin="Default" />

cs:

protected void LoadCities()
{
    SqlConnection connection = new SqlConnection(
    ConfigurationManager.ConnectionStrings["SiteSqlServer1"].ConnectionString);
    SqlDataAdapter adapter = new SqlDataAdapter(@"", connection);
    DataTable dt = new DataTable();
    adapter.Fill(dt);
    CityDDL.DataTextField = "Name";
    CityDDL.DataValueField = "ID";
    CityDDL.DataSource = dt;
    CityDDL.DataBind();
    // Insert the first item.
    CityDDL.Items.Insert(0, new RadComboBoxItem("- Select City -"));
}

RadListView Code:
aspx:

<telerik:RadListView ID="RadListView1" runat="server" DataSourceID="SqlDataSource1"

    ItemPlaceholderID="ListViewContainer" AllowPaging="True" PageSize="12"

        onprerender="RadListView1_PreRender">

    <LayoutTemplate>                    

               <asp:PlaceHolder runat="server" id="ListViewContainer" />

    </LayoutTemplate>

    <ItemTemplate>

        <fieldset style="float: left; width: 266px; height: 260px;">

            <legend><b>State Name:</b>: <%#Eval("Name")%></legend>

            <div class="details">                           

                            <asp:Button ID="SelectStateID" OnClick="SelectStateID_Click"
CommandArgument='<%# Eval("ID") %>' runat="server" Text="Select State"  />

                <div class="data-container">

                    <ul>

                        <li>

                            <label>

                                State Code:

                            <%#Eval("Code")%>                          

                        </li>                       

                    </ul>                                        

                </div>

            </div>

        </fieldset>

    </ItemTemplate>

</telerik:RadListView>

cs:

protected void RadListView1_PreRender(object sender, EventArgs e)
{
    foreach (RadListViewItem item in RadListView1.Items)
    {
        Button lnk = item.FindControl("SelectStateID") as Button;
        RadAjaxManager1.AjaxSettings.AddAjaxSetting(lnk, Label1);
    }
}

ASP Button Code:
cs:

protected void SelectStateID_Click(object sender, EventArgs e)

{   


    var argument = ((Button)sender).CommandArgument;

    Label1.Text = argument.ToString();

}

RadAjaxManager Code:
aspx:

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" DefaultLoadingPanelID="RadAjaxLoadingPanel1">

         <AjaxSettings>

             <telerik:AjaxSetting AjaxControlID="CityDDL" EventName="SelectedIndexChanged">

                 <UpdatedControls>

                     <telerik:AjaxUpdatedControl ControlID="RadListView1" />

                 </UpdatedControls>

             </telerik:AjaxSetting>

         <telerik:AjaxSetting AjaxControlID="SelectStateID" EventName="SelectStateID_Click">

                 <UpdatedControls>

                     <telerik:AjaxUpdatedControl ControlID="Label1" />                                       

                 </UpdatedControls>

             </telerik:AjaxSetting>

        </AjaxSettings>

        </telerik:RadAjaxManager>

        <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">

            <asp:Image ID="Image1" runat="server" ImageUrl="~/images/WebResource.axd.gif" AlternateText="Loading..." />

        </telerik:RadAjaxLoadingPanel>

ASP Label:
aspx:

<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>


please help me.
thanks


[Andrey]

Hello,

The problem you are observing is caused by the fact that you are adding the Ajax settings too late in the page life-cycle and the RadAjaxManager could not register them.

If the Label1 control is located directly on the page you could achieve your goal by using the following Ajax settings set declaratively in mark-up:

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" DefaultLoadingPanelID="RadAjaxLoadingPanel1">
     <AjaxSettings>
         <telerik:AjaxSetting AjaxControlID="CityDDL" EventName="SelectedIndexChanged">
             <UpdatedControls>
                 <telerik:AjaxUpdatedControl ControlID="RadListView1" />
             </UpdatedControls>
         </telerik:AjaxSetting>
     <telerik:AjaxSetting AjaxControlID="SelectStateID" EventName="SelectStateID_Click">
             <UpdatedControls>
                 <telerik:AjaxUpdatedControl ControlID="Label1" />
             </UpdatedControls>
         </telerik:AjaxSetting>
         <telerik:AjaxSetting AjaxControlID="RadListView1">
             <UpdatedControls>
                 <telerik:AjaxUpdatedControl ControlID="Label1" />
                 <telerik:AjaxUpdatedControl ControlID="RadListView1" />
             </UpdatedControls>
         </telerik:AjaxSetting>
    </AjaxSettings>
</telerik:RadAjaxManager>

If the label is located somewhere else please elaborate a bit more.

Regards,
Andrey
the Telerik team