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Filtering combobox not working with ajax

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Jill asked on 29 Nov 2008, 10:37 PM
I have a combobox defined on my .aspx page as follows:

<radC:RadComboBox ID="ddlCustomers" runat="server" Height="300px" EnableLoadOnDemand="true"

HighlightTemplatedItems="true" Skin="WindowsXP" Width="300px" AutoPostBack="true" />

I load the combobox in the ItemRequested event as follows:
With ddlCustomers



'-- 1) Clear any items that already exist --






'-- 2) Set the fields, get the dataset and bind the results --



.DataTextField = strTextField


.DataValueField = strValueField

.DataSource = GetDataTable(chkActiveOnly.checked)



End With



I have a checkbox on the page that is autopostback and ajaxifies as follows:


<asp:CheckBox ID="chkActiveOnly" runat="server" Text="Active Customers Only" AutoPostBack="true" />



<radA:RadAjaxManager ID="ramManageCustomers" runat="server">


<radA:AjaxSetting AjaxControlID="chkActiveOnly">


<radA:AjaxUpdatedControl ControlID="chkActiveOnly" />

<radA:AjaxUpdatedControl ControlID="ddlCustomers" />






Here is the checkchanged event for my checkbox:



Sub chkActiveOnly_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles chkActiveOnly.CheckedChanged



New HttpCookie("ShowInactive", Not chkActiveOnly.Checked))




End Sub



When I navigate to the page, the stored procedure in the ItemRequested event pulls only records that are marked active in the DB.  If I click the checkbox to uncheck it (meaning I want to populate the combobox with all values and not just those that are marked active in the DB), the combobox fills all values just fine.  However, if I try to filter the combobox by entering a "t" in the textbox area of the combobox so that it only shows records in the combobox that start with a "t", the list reverts back to the original stored procedure used (which filters out inactive records).  I am assuming this is a problem with how the radcombobox ajaxifies, but if you have a work around, that would really help.

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answered on 02 Dec 2008, 04:24 PM
Hello Jill,

This happens because the current state of the CheckBox is unavailable in the ItemsRequested event handler - it is in its initial state - unchecked.

Please use the ClientDataString to send the state of the CheckBox from the client to the server. Please see this help article for more information about the approach.

Kind regards,
the Telerik team

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