RadComboBox Selection out of range Error

[DanR]

Hi:

I am testing a RadComboBox inside of a basic formview that is for a drop down selection of the months in a year. I want to display the months in the year in the combobox, then store the corresponding value in the database (e.g. If March is selected, then store "3").

I have set up the radcombobox as follows:

<telerik:RadComboBox ID="RadComboBox1"
                     runat="server"
                     Label="Month"
                     SelectedValue='<%# Bind("Month") %>'
                     LabelCssClass="right_Aligned_Labels"
                     MaxLength="2"
                     >
                     <Items>
                        <telerik:RadComboBoxItem runat="server" text="January" value="1" />
                        <telerik:RadComboBoxItem runat="server" text="February" value="2" />
                        <telerik:RadComboBoxItem runat="server" text="March" value="3" />
                        <telerik:RadComboBoxItem runat="server" text="April" value="4" />
                        <telerik:RadComboBoxItem runat="server" text="May" value="5" />
                        <telerik:RadComboBoxItem runat="server" text="June" value="6" />
                        <telerik:RadComboBoxItem runat="server" text="July" value="7" />
                        <telerik:RadComboBoxItem runat="server" text="August" value="8" />
                        <telerik:RadComboBoxItem runat="server" text="September" value="9" />
                        <telerik:RadComboBoxItem runat="server" text="October" value="10" />
                        <telerik:RadComboBoxItem runat="server" text="November" value="11" />
                        <telerik:RadComboBoxItem runat="server" text="December" value="12" />
                     </Items>
</telerik:RadComboBox>

My formview is set to default to edit mode. The record I am testing with has the month column value set to "9" so I know the value is in the item list. However, when I run this program I get the error:

Selection out of range
Parameter name: value

I have looked at many posts on this issue, but I still do not know why I am getting this error. The database column I am binding to definitely has a valid value in it (e.g. "9") which should cause "September" to display based on the current record. Yet, I get this error.

This seems like such a simple requirement. How can I get this working?

Thanks, Dan

Here is the stack trace:

[ArgumentOutOfRangeException: Selection out of range
Parameter name: value]
   Telerik.Web.UI.RadComboBox.PerformDataBinding(IEnumerable dataSource) +172
   Telerik.Web.UI.RadComboBox.OnDataSourceViewSelectCallback(IEnumerable data) +471
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +31
   Telerik.Web.UI.RadComboBox.OnDataBinding(EventArgs e) +1234
   Telerik.Web.UI.RadComboBox.PerformSelect() +37
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
   Telerik.Web.UI.RadComboBox.DataBind() +68
   System.Web.UI.Control.DataBindChildren() +211
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +102
   System.Web.UI.Control.DataBind() +15
   System.Web.UI.Control.DataBindChildren() +211
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +102
   System.Web.UI.Control.DataBind() +15
   System.Web.UI.Control.DataBindChildren() +211
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +102
   System.Web.UI.Control.DataBind() +15
   System.Web.UI.Control.DataBindChildren() +211
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +102
   System.Web.UI.WebControls.FormView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) +1461
   System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +57
   System.Web.UI.WebControls.FormView.PerformDataBinding(IEnumerable data) +12
   System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +114
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +31
   System.Web.UI.WebControls.DataBoundControl.PerformSelect() +142
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
   System.Web.UI.WebControls.FormView.DataBind() +4
   System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82
   System.Web.UI.WebControls.FormView.EnsureDataBound() +166
   System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +72
   System.Web.UI.Control.EnsureChildControls() +87
   System.Web.UI.WebControls.CompositeDataBoundControl.get_Controls() +15
   Telerik.Web.UI.RadFormDecorator.FindDataControls(Control parent) +80
   Telerik.Web.UI.RadFormDecorator.FindDataControls(Control parent) +437
   Telerik.Web.UI.RadFormDecorator.FindDataControls(Control parent) +437
   Telerik.Web.UI.RadFormDecorator.FindDataControls(Control parent) +437
   Telerik.Web.UI.RadFormDecorator.FindDataControls(Control parent) +437
   Telerik.Web.UI.RadFormDecorator.FindDataControls(Control parent) +437
   Telerik.Web.UI.RadFormDecorator.FindDataControls(Control parent) +437
   Telerik.Web.UI.RadFormDecorator.DecorateAspNetDataControls() +68
   Telerik.Web.UI.RadFormDecorator.ControlPreRender() +758
   Telerik.Web.UI.RadWebControl.OnPreRender(EventArgs e) +47
   System.Web.UI.Control.PreRenderRecursiveInternal() +80
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

[Simon]

Hello Dan Roth,

Can you please see the attached project in which I tried reproducing the issue you are having? Am I missing something in the setup?

All the best,
Simon
the Telerik team