telerik:GridTemplateColumn HeaderText="Name" UniqueName="RelType" HeaderStyle-Width="25%"

DataField="RelationType">

<FilterTemplate>

<telerik:RadComboBox ID="RadComboBoxRelatedContacts" runat="server" AutoPostBack="true" OnSelectedIndexChanged="RadComboBoxRelatedContacts_SelectedIndexChanged">

<Items>

<telerik:RadComboBoxItem Text="Family" Value="Family" />

<telerik:RadComboBoxItem Text="Business" Value="Business" />

<telerik:RadComboBoxItem Text="Personal" Value="Personal" />

</telerik:RadComboBox>

</FilterTemplate>

<ItemTemplate><asp:Label ID="Label1" runat="server" CssClass="label" Visible='<%# !Convert.IsDBNull(Eval("Relationship")) %>'><br /><b>Relationship</b>:&nbsp;</asp:Label><%# Eval("Relationship")%>

<asp:Label ID="Label2" runat="server" CssClass="label" Visible='<%# !Convert.IsDBNull(Eval("RelationType")) %>'><br /><b>Rel. Type</b>:&nbsp;</asp:Label><%# Eval("RelationType")%>

</ItemTemplate>

</telerik:GridTemplateColumn>

aspx.cs

void RadComboBoxRelatedContacts_SelectedIndexChanged(object sender, RadComboBoxSelectedIndexChangedEventArgs e)

{

RadComboBox list = (RadComboBox)sender;

string filterExpression = "([RelationType] = '" + list.SelectedValue + "')";

GridFilteringItem item = (GridFilteringItem)list.NamingContainer;

RadGrid gridKeyRel = (RadGrid)item.NamingContainer.NamingContainer.NamingContainer;

gridKeyRel.MasterTableView.FilterExpression = filterExpression;

gridKeyRel.MasterTableView.Rebind(); 

}

<telerik:RadScriptManager ID="RadScriptManager1" runat="server" />

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" OnAjaxRequest="RadAjaxManager1_AjaxRequest">

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="ddAgency" >

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="ddAgency" />

</UpdatedControls>

</telerik:AjaxSetting>

<telerik:AjaxSetting AjaxControlID="RadAjaxManager1" >

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="ddAgency" />

</UpdatedControls>

</telerik:AjaxSetting>

<telerik:AjaxSetting AjaxControlID="ddAgency">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="ddAgencyContract" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<telerik:RadAjaxPanel ID="radPanel1" runat="server">

<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server" >

<script type="text/javascript">

//<![CDATA[

function OnClientClose(oWnd, args) {

var arg = args.get_argument();

if (arg) {

var ajaxManager = $find("<%= RadAjaxManager1.ClientID %>");

if (ajaxManager) {

alert(arg)

ajaxManager.ajaxRequest(arg);

}

}

}

//]]>

</script>

</telerik:RadCodeBlock>

protected

void RadAjaxManager1_AjaxRequest(object sender, Telerik.Web.UI.AjaxRequestEventArgs e)

{

string cArgs = Convert.ToString(e.Argument);

if (cArgs.Contains(":"))

{

string[] vals = cArgs.Split(':');

string cFieldType = vals[0];

string cValue = vals[1];

switch (cFieldType)

{

case "Agency":

Utility.LoadRadComboBox("Agencies", ddAgency, "Name", "Id", "");

ddAgency.SelectedValue = cValue;

ddAgency.Text =

"Text from Code";

break;

case "Resource":

Utility.LoadRadComboBox("Resources", ddResource, "FullName", "Id", "");

ddResource.SelectedValue = cValue;

break;

case "AgencyContact":

Utility.LoadRadComboBox("AgencyContacts", ddAgencyContact, "FullName", "Id", "");

ddAgencyContact.SelectedValue = cValue;

break;

default:

break;

}

}

}