Dropdown not expanding on text change

[Andy Byrne]

Hello,

I have a simple drop down:

<div style="margin: 0 0 15px 0;"><b>Available User(s):</b>
<telerik:RadComboBox ID="rcbApprovalUsers" runat="server" MarkFirstMatch="true" AllowCustomText="false"
    Filter="Contains" Width="250px" />
</div>

void rcbApprovalUsers_DataBinding(object sender, EventArgs e)
{
    List<ApproverInfo> unassignedApprovalUsers =
        CustomerFactory.ApprovalForwardingGetUnassigned(ECISite.ID, Master.ECICustomer.ID, Master.ECISession.AccountInfo.AccountNumber);

    rcbApprovalUsers.Visible = bAddApprover.Visible = (unassignedApprovalUsers.Count != 0);
    lNoApproversAvailable.Visible = (unassignedApprovalUsers.Count == 0);


    if (unassignedApprovalUsers.Count > 0)
    {
        rcbApprovalUsers.DataSource = unassignedApprovalUsers;
        rcbApprovalUsers.DataTextField = "UserInfo";
        rcbApprovalUsers.DataValueField = "CustomerID";
        rcbApprovalUsers.SelectedValue = unassignedApprovalUsers[0].CustomerID.ToString();
    }
}

If I click on this drop-down I see the following behaviors:

1) Text for selected value is highlighted.
2) Combo box expands to display values
3) On typing values the values filter to those containing the typed text

However, if I tab to this drop-down the behavior is different.  The combo box won't expand when I start typing and the only way to make this happen is to physically click on the combo box.

Is there a way to make the combo box expand when they start typing regardless of whether they tabbed or clicked to it?  Basically I would like the user to be able to see the available values containing their typed text without having to click the drop-down.

Thanks,
Andy

[Kate]

Hello Andy Byrne,

You could add the following event to your code:

<script type="text/javascript">
        function onKeyPressing(sender, eventArgs) {
            if (!sender.get_dropDownVisible())
                sender.showDropDown();
        }
    </script>

and then hook it here:

<telerik:RadComboBox ID="rcbApprovalUsers" runat="server" MarkFirstMatch="true" AllowCustomText="false" OnClientKeyPressing="onKeyPressing" Filter="Contains" Width="250px">

All the best,
Katerina
the Telerik team