DropDownList and Edit/Insert mode URGENT!!

[Tim]

I have tried all the demos and examples and nothing has worked!
Markup:

<telerik:RadGrid ID="grvUsers"
                     runat="server"
                     AutoGenerateColumns="False"
                     GridLines="None"
                     Skin="Office2007"
                     OnNeedDataSource="grvUsers_NeedDataSource"
                     OnUpdateCommand="grvUsers_UpdateCommand"
                     AllowPaging="True"
                     AllowSorting="True"
                     ShowGroupPanel="True" OnItemCommand="grvUsers_ItemCommand" OnEditCommand="grvUsers_EditCommand">
        <MasterTableView AllowAutomaticInserts="True" CommandItemDisplay="Top">
            <RowIndicatorColumn Visible="False">
                <HeaderStyle Width="20px" />
            </RowIndicatorColumn>
            <ExpandCollapseColumn Resizable="False" Visible="False">
                <HeaderStyle Width="20px" />
            </ExpandCollapseColumn>
            <Columns>
                <telerik:GridEditCommandColumn>
                </telerik:GridEditCommandColumn>
                <telerik:GridBoundColumn DataField="LastName" HeaderText="Last Name" UniqueName="LastName">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="FirstName" HeaderText="First Name" UniqueName="FirstName">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="UserLevel" HeaderText="User Rights" UniqueName="Rights">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="Enabled" HeaderText="Enabled" UniqueName="Enabled">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="UserInfoUID" UniqueName="UserInfoUID" Visible="False">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="UserName" UniqueName="UserName" Visible="False">
                </telerik:GridBoundColumn>
            </Columns>
            <EditFormSettings EditFormType="Template" CaptionFormatString="Edit the information for &lt;%# Bind('FirstName') %&gt; &lt;%# Bind('LastName') %&gt;" >
                <EditColumn UniqueName="EditCommandColumn1"></EditColumn>
                <FormTemplate>
                    <table style="width: 568px">
                        <tr>
                            <td style="width: 131px">
                                Last Name</td>
                            <td style="width: 160px">
                                <telerik:RadTextBox ID="txtEdit_LastName" runat="server" MaxLength="50" Text="<%# Bind('LastName') %>">
                                </telerik:RadTextBox></td>
                            <td>
                                <asp:RequiredFieldValidator ID="rfvEdit_LastName" runat="server" ControlToValidate="txtEdit_LastName"
                                    ErrorMessage="Please enter the users last name" ValidationGroup="Edit">*</asp:RequiredFieldValidator>
                            </td>
                            <td style="width: 174px">
                                First Name</td>
                            <td style="width: 156px">
                                <telerik:RadTextBox ID="txtEdit_FirstName" runat="server" MaxLength="50" Text="<%# Bind('FirstName') %>">
                                </telerik:RadTextBox></td>
                            <td>
                                <asp:RequiredFieldValidator ID="rfvEdit_FirstName" runat="server" ControlToValidate="txtEdit_FirstName"
                                    ErrorMessage="Please enter the users first name" ValidationGroup="Edit">*</asp:RequiredFieldValidator></td>
                        </tr>
                        <tr>
                            <td style="width: 131px">
                                Username</td>
                            <td style="width: 160px">
                                <telerik:RadTextBox ID="txtEdit_Username" runat="server" Text="<%# Bind('Username') %>">
                                </telerik:RadTextBox></td>
                            <td>
                                <asp:RequiredFieldValidator ID="rfvEdit_UserName" runat="server" ControlToValidate="txtEdit_Username"
                                    ErrorMessage="Please enter the users 'Username'" ValidationGroup="Edit">*</asp:RequiredFieldValidator></td>
                            <td style="width: 174px">
                            </td>
                            <td style="width: 156px">
                            </td>
                            <td>
                            </td>
                        </tr>
                        <tr>
                            <td style="width: 131px; height: 27px">
                                Password</td>
                            <td style="width: 160px; height: 27px">
                                <telerik:RadTextBox ID="txtEdit_Password" runat="server" InvalidStyleDuration="100" Text="<%# Bind('Password') %>" Width="125px" EmptyMessage="************" MaxLength="20" TextMode="Password">
                                </telerik:RadTextBox></td>
                            <td style="height: 27px">
                            </td>
                            <td style="width: 174px; height: 27px">
                                Password</td>
                            <td style="height: 27px; width: 156px;">
                                <telerik:RadTextBox ID="txtEdit_ConfirmPassword" runat="server" InvalidStyleDuration="100" Text="<%# Bind('Password') %>" TextMode="Password" Width="125px" EmptyMessage="***********" MaxLength="20">
                                </telerik:RadTextBox>
                            </td>
                            <td style="height: 27px">
                            </td>
                        </tr>
                        <tr>
                            <td>
                                Rights</td>
                            <td>
                                <asp:DropDownList ID="cmbEdit_Rights" runat="server" Width="119px" SelectedValue='<%# Bind("UserLevel") %>'>
                                    <asp:ListItem>User</asp:ListItem>
                                    <asp:ListItem>Admin</asp:ListItem>
                                </asp:DropDownList></td>
                            <td>
                            </td>
                            <td>
                                Enabled</td>
                            <td>
                                <asp:DropDownList ID="cmbEdit_Enabled" runat="server" Width="119px" SelectedValue='<%# Bind("Enabled") %>'>
                                    <asp:ListItem Value="True">Yes</asp:ListItem>
                                    <asp:ListItem Value="False">No</asp:ListItem>
                                </asp:DropDownList></td>
                            <td>
                            </td>
                        </tr>
                        <tr>
                            <td colspan="6">
                            </td>
                        </tr>
                        <tr>
                            <td align="right" colspan="6">
                                <asp:LinkButton ID="lnkEdit_Cancel" runat="server" CausesValidation="False" CommandName="Cancel" Text='<%# (Container is GridEditFormInsertItem) ? "Done" : "Cancel" %>' >Cancel</asp:LinkButton>&nbsp;
                                &nbsp;<asp:LinkButton ID="lnkEdit_Done" runat="server" CommandName='<%# (Container is GridEditFormInsertItem) ? "PerformInsert" : "Update" %>' Text='<%# (Container is GridEditFormInsertItem) ? "Save" : "Save Changes" %>'></asp:LinkButton>
                                &nbsp;
                            </td>
                        </tr>
                        <tr>
                            <td align="center" colspan="6">
                                <asp:Label ID="lblUID" runat="server" Text="<%# Bind('UserInfoUID') %>" Visible="False"></asp:Label>
                                <asp:Label ID="lblEdit_Message" runat="server"></asp:Label>
                            </td>
                        </tr>
                        <tr>
                            <td align="center" colspan="6" style="height: 21px">
                                <asp:ValidationSummary ID="vsEdit" runat="server" ValidationGroup="Edit" />
                            </td>
                        </tr>
                    </table>
                </FormTemplate>
                <PopUpSettings ScrollBars="None" />
            </EditFormSettings>
            <CommandItemSettings AddNewRecordText="Add new user" />
            <PagerStyle AlwaysVisible="True" HorizontalAlign="Left" Mode="Slider" />
        </MasterTableView>
        <ClientSettings AllowColumnsReorder="True" ReorderColumnsOnClient="True" AllowDragToGroup="True">
            <Selecting AllowRowSelect="True" />
        </ClientSettings>
    </telerik:RadGrid>

Now, heres where it works and doesn't. If I have this line (similar for the second drop down):

 <asp:DropDownList ID="cmbEdit_Enabled" runat="server" Width="119px" SelectedValue='<%# Bind("Enabled") %>'>
                                    <asp:ListItem Value="True">Yes</asp:ListItem>
                                    <asp:ListItem Value="False">No</asp:ListItem>
                                </asp:DropDownList>

when I go into edit mode, the drop downs are populated with the current values which is a project requirement.  But when I click the 'Add new user', I get this error:

'cmbEdit_Rights' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value

If I leave out the <%# Bind("UserLevel") %> I can insert and update, but I loose the requirement of displaying the current value which I need.


Please help asap!

[Shinu]

Hi Tim,

The reason for this error is that your grid instance can not bind a value for the newly inserted item through the Eval()/Bind() syntax you hard-coded (as you may have seen from the stack trace of the error). Go through the following help article to get details on fixing this error.

'DropDownList' has a SelectedValue which is invalid because it does not exist in the list of items


Thanks
Shinu.

[Allan]

Shinu,

I have this exact came issue, unfortunately your link no longer works. Does the article still exist?

[Shinu]

Hello Allan,

Check the following link.
'DropDownList' has a SelectedValue which is invalid because it does not exist in the list of items

-Shinu.