ItemsRequested interaction with other web controls doesn't get current state

[Brandon Spilove]

I have a RadComboBox I am using ItemsRequested to populate the combobox with data that is filtered by the contents of another asp:TextBox control. So it is something like this:

<asp:TextBox runat="server" id="txtFilter" />

<telerik:RadComboBox runat="server" ID="rcbPCN" AllowCustomText="true" EnableLoadOnDemand="true"
                                 OnItemsRequested="rcbPCN_ItemsRequested"
                                 AutoPostBack="True" CausesValidation="False"
                                onselectedindexchanged="rcbPCN_SelectedIndexChanged" Filter="StartsWith" />

.... code behind:

        protected void rcbPCN_ItemsRequested(object o, Telerik.Web.UI.RadComboBoxItemsRequestedEventArgs e)
        {
                var query = PlanManager.QueryPlans().Where(q => q.bin == txtFilter.Text);
                rcbPCN.DataSource = query;
                rcbPCN.DataBind();
        }

The problem is that txtFilter.Text in the ItemsRequested event is only read the first time. After I delete the text from the RadComboBox, then change the text in txtFilter, then click the arrow on the combobox again, the results it shows me are from the original value of txtFilter.Text, not the newly changed value. How can I get around this? I need the combobox to always show a list of results that match the current value of txtFilter.Text.

thanks!
Brandon

[Simon]

Hello Brandon Spilove,

During a Load On Demand request the state of all controls on the page is the initial one. That is why the TextBox' value does not reflect that on the client.

In this case you could use the Context object to send the TextBox value to the ItemsRequested event handler as shown in this help article.

I hope this helps.

All the best,
Simon
the Telerik team