[Solved] "Selection out of range" - Binding to an Enum type?

[Michael]

I'm getting the "Selection out of range" in the combobox. I have set values:

<telerik:RadComboBox width="150px" runat="server" ID="ddlProjectType" AppendDataBoundItems="true" OnI SelectedValue='<%# Bind("ProjectType") %>'>
                        <Items>
                            <telerik:RadComboBoxItem Text="Select a Value..." Value="" />
                            <telerik:RadComboBoxItem Text="Interstate" Value="0" />
                            <telerik:RadComboBoxItem Text="Intrastate" Value="1" />
                        </Items>
                    </telerik:RadComboBox>

I've tried with and without AppendDataBoundItems. I've not tried the clear method because I'm not sure where that would go (which event?). I have a sneaking suspicion this is being caused by the fact that the "ProjectType" property in my business entity is of a type of enum.
My enum:

public enum enProjectType
    {
        Interstate = 0,
        Intrastate
    }

My Bound object property:

public enProjectType ProjectType { get; set; }

If this is the problem, is there a way to cast to an int or something to make this work?

Here is a copy of the full stacktrace:
[ArgumentOutOfRangeException: Selection out of range
Parameter name: value]
   Telerik.Web.UI.RadComboBox.PerformDataBinding(IEnumerable dataSource) +259
   Telerik.Web.UI.RadComboBox.OnDataSourceViewSelectCallback(IEnumerable data) +10
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +31
   Telerik.Web.UI.RadComboBox.OnDataBinding(EventArgs e) +83
   Telerik.Web.UI.RadComboBox.PerformSelect() +34
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
   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.Control.PreRenderRecursiveInternal() +44
   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.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.WebControls.WebParts.WebPart.PreRenderRecursiveInternal() +42
   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.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842


Thank in advance!

[Michael]

Got it! I changed my control's SelectedItem property to this:

SelectedValue='<%# Bind("ProjectType", "{0:d}") %>'