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Selection out of range -not in grid or form

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ComboBox

This is a migrated thread and some comments may be shown as answers.

Patrice asked on 08 Nov 2011, 12:45 AM

I have combobox that is EnableAutomaticLoadOnDemand=true
It is not in a grid or a form, and the object and events for the combo are available via the .NET code pickboxes.
Every so often the Selection out of range Parameter name: value exception will rear it's ugly head.
I was driving three other radgrid on my page without problem. This exception will show weather the combo is part of hte ajaxmanager or not. I read that clearing the combo will solve this, but all this is set to automatic.
See combo config below:

<telerik:RadComboBox runat="server" ID="ddlEmployee" DataSourceID="dsEmployeeID"

EmptyMessage="Select an Employee"

skin="Vista"

DataTextField="txt"

DataValueField="EmpID"

Width="300px"

DropDownWidth="350px"

CausesValidation="false"

AutoPostBack="True"

EnableVirtualScrolling="true"

Filter="Contains"

EnableAutomaticLoadOnDemand="true"

HighlightTemplatedItems="true"

ShowMoreResultsBox="true"

AllowCustomText="true"

MarkFirstMatch="true"

SortCaseSensitive="False"

ItemsPerRequest="20">

<HeaderTemplate>

<table style="width: 350px; text-align: left">

<tr>

<td style="width: 110px;">Last Name</td>

<td style="width: 110px;">First Name</td>

<td style="width: 130px;">Employee ID</td>

</tr>

</table>

</HeaderTemplate>

<ItemTemplate>

<table style="width: 315px; text-align: left">

<tr>

<td style="width: 125px;">

<%#DataBinder.Eval(Container.DataItem, "LName")%>

</td>

<td style="width: 125px;">

<%#DataBinder.Eval(Container.DataItem, "FName")%>

</td>

<td style="width: 100px;">

<%#DataBinder.Eval(Container.DataItem, "EmpID")%>

</td>

</tr>

</table>

</ItemTemplate>

</telerik:RadComboBox>

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