ExtJs4 - Form defined in javascript multicombo loaded at runtime - extjs

Question

When the form is initially loaded the multicombo on the form correctly reflects the data that is set up.
However, if I attempt to update the information at runtime, the list of options in the multicombo aren't updated when the form is displayed.
I have them successfully defined as form options, they have a simple 'text' only store. However, I can't seem to find the correct set of properties and method to actually update the multicombo from the C# code as needed.

Answer 1

I've noticed this as well. You can set the Ext.net.ListItems on page-load but they are fickle when it comes to setting them dynamically in code-behind. I now always use a Ext.net.Store with any Multicombo or ComboBox that needs to dynamically change.
You can use the Handler events on Focus or BeforeSelect to reload the list.
<ext:ComboBox ID="ComboBoxTransferGroupMembers" runat="server" FieldLabel="Transfer To" EmptyText="Group Members" LabelAlign="Top" DisplayField="Name" ValueField="Id" MarginSpec="0 0 5">
<Listeners>
<Focus Handler="#{ComboBoxTransferGroupMembers}.store.reload()" />
</Listeners>
<Store>
<ext:Store runat="server" OnReadData="StoreTransferGroupMember_ReadData" ID="StoreXferGroup">
<Model>
<ext:Model IDProperty="Id" runat="server">
<Fields>
<ext:ModelField Name="Name" />
<ext:ModelField Name="Id" />
</Fields>
</ext:Model>
</Model>
<Parameters>
<ext:StoreParameter Mode="Raw" Name="Group" Value="#{ComboBoxTransferGroup}.getValue()" />
</Parameters>
</ext:Store>
</Store>
<DirectEvents>
<Select OnEvent="ComboBoxTransferGroupMembers_Select">
<ExtraParams>
<ext:Parameter Mode="Raw" Name="Group" Value="#{ComboBoxTransferGroup}.getValue()" />
</ExtraParams>
</Select>
</DirectEvents>
</ext:ComboBox>