I'm trying to get a RadComboBox to work in RadGrid FormTemplate.I'm getting this error:
Line: 15
Error: Sys.WebForms.PageRequestManagerServerErrorException: Selection out of range
Parameter name: value
.aspx
 
.cs
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                Line: 15
Error: Sys.WebForms.PageRequestManagerServerErrorException: Selection out of range
Parameter name: value
.aspx
<telerik:RadGrid ID="RadGrid1" runat="server"                AllowFilteringByColumn="True"                AllowPaging="True"                AllowSorting="True"                AutoGenerateColumns="False"                DataSourceID="SqlDataSource1"                OnItemDeleted="RadGrid1_ItemDeleted"                OnItemInserted="RadGrid1_ItemInserted"                OnItemUpdated="RadGrid1_ItemUpdated"                GridLines="None"                AllowAutomaticDeletes="True"                AllowAutomaticInserts="True"                AllowAutomaticUpdates="True">                <GroupingSettings CaseSensitive="False"></GroupingSettings>                <ClientSettings AllowColumnsReorder="True">                    <Selecting AllowRowSelect="True" />                    <Selecting AllowRowSelect="True"></Selecting>                </ClientSettings>                <GroupingSettings CaseSensitive="false" />            <MasterTableView autogeneratecolumns="False" DataKeyNames="id" DataSourceID="SqlDataSource1">                    <Columns>                        <telerik:GridEditCommandColumn ButtonType="PushButton">                        </telerik:GridEditCommandColumn>                        <telerik:GridBoundColumn DataField="s_page" DefaultInsertValue="" HeaderText="s_page" UniqueName="s_page" SortExpression="s_page">                        </telerik:GridBoundColumn>                        <telerik:GridBoundColumn DataField="s_doc_title" DefaultInsertValue="" HeaderText="s_doc_title" UniqueName="s_doc_title" SortExpression="s_doc_title">                        </telerik:GridBoundColumn>                        <telerik:GridBoundColumn DataField="s_doc_url" DefaultInsertValue="" HeaderText="s_doc_url" SortExpression="s_doc_url" UniqueName="s_doc_url">                        </telerik:GridBoundColumn>                        <telerik:GridBoundColumn DataField="d_date_uploaded" DataType="System.DateTime" DefaultInsertValue="" HeaderText="d_date_uploaded" SortExpression="d_date_uploaded" UniqueName="d_date_uploaded">                        </telerik:GridBoundColumn>                        <telerik:GridBoundColumn DataField="d_date_displayed" DataType="System.DateTime" DefaultInsertValue="" HeaderText="d_date_displayed" SortExpression="d_date_displayed" UniqueName="d_date_displayed">                        </telerik:GridBoundColumn>                        <telerik:GridCheckBoxColumn DataField="b_visible" DefaultInsertValue="" HeaderText="b_visible" UniqueName="b_visible" DataType="System.Boolean" SortExpression="b_visible">                        </telerik:GridCheckBoxColumn>                    </Columns>                    <EditFormSettings ColumnNumber="3" CaptionFormatString="Edit details for {0}" CaptionDataField="id" EditColumn-ButtonType="PushButton" EditFormType="Template">                    <FormTableItemStyle Wrap="False"></FormTableItemStyle>                    <FormTableStyle CellPadding="2" CellSpacing="0" GridLines="Horizontal" CssClass="module" Height="110px" Width="100%"></FormTableStyle>                    <FormMainTableStyle CellPadding="3" CellSpacing="0" Width="100%"></FormMainTableStyle>                    <FormCaptionStyle CssClass="EditFormHeader"></FormCaptionStyle>                    <FormMainTableStyle GridLines="None" CellSpacing="0" CellPadding="3" Width="100%" />                    <FormTableStyle GridLines="Horizontal" CellSpacing="0" CellPadding="2" CssClass="module" Height="110px" Width="100%" />                    <FormTableAlternatingItemStyle Wrap="False"></FormTableAlternatingItemStyle>                    <FormStyle Width="100%" BackColor="#eef2ea"></FormStyle>                    <EditColumn UpdateText="Update record" UniqueName="EditCommandColumn1" CancelText="Cancel edit" ButtonType="PushButton">                    </EditColumn>                    <FormTableButtonRowStyle HorizontalAlign="Left" CssClass="EditFormButtonRow"></FormTableButtonRowStyle>                    <FormTemplate>                        <table cellspacing="0" cellpadding="0" border="0">                            <tr>                                <td width="400">                                    <table cellspacing="0" cellpadding="0" border="0">                                        <tr>                                            <td width="5">                                            </td>                                            <td width="375" valign="top">                                                ID:                                            </td>                                            <td>                                                <asp:Label ID="lbl_id" runat="server" Text='<%# Bind("id") %>'></asp:Label>                                            </td>                                        </tr>                                        <tr>                                            <td width="5">                                            </td>                                            <td width="375" valign="top">                                                Page:                                            </td>                                            <td>                                                <telerik:RadComboBox ID="RadComboBox1" runat="server"                                                    DataSourceID="SqlDataSource3"                                                     DataTextField="MenuText"                                                     DataValueField="MenuId"                                                     SelectedValue='<%# Bind("s_page") %>'                                                     Skin="Vista" AutoPostBack="True">                                                </telerik:RadComboBox>                                            </td>                                        </tr>                                        <tr>                                            <td width="5">                                            </td>                                            <td width="375" valign="top">                                                Doc. Title:                                            </td>                                            <td>                                                <asp:TextBox Width="240px" ID="txtbx_title" runat="server" Text='<%# Bind("s_doc_title") %>'></asp:TextBox>                                            </td>                                        </tr>                                        <tr>                                            <td width="5">                                            </td>                                            <td width="375" valign="top">                                                Date Uploaded:                                            </td>                                            <td>                                                <asp:TextBox Width="240px" ID="TextBox3" runat="server" Text='<%# Bind("d_date_uploaded") %>'></asp:TextBox>                                            </td>                                        </tr>                                        <tr>                                            <td width="5">                                            </td>                                            <td width="375" valign="top">                                                Date Displayed:                                            </td>                                            <td>                                                <asp:TextBox Width="240px" ID="TextBox4" runat="server" Text='<%# Bind("d_date_displayed") %>'></asp:TextBox>                                            </td>                                        </tr>                                    </table>                                </td>                                <td width="400">                                    <table>                                        <tr>                                            <td width="5">                                            </td>                                            <td width="90" valign="top">                                                PDF File Name:                                            </td>                                            <td>                                                <asp:TextBox Width="240px" ID="TextBox2" runat="server" Text='<%# Bind("s_doc_url") %>'></asp:TextBox>                                                <asp:Button ID="btn_pdf_upload" runat="server" Text="Upload PDF File" onclick="btn_pdf_upload_Click" />                                            </td>                                        </tr>                                    </table>                                    </td>                            </tr>                            <tr>                                <td colspan="2" align="center">                                    <asp:Button ID="btnUpdate" Text='<%# (Container is GridEditFormInsertItem) ? "Insert" : "Update" %>' runat="server" CommandName='<%# (Container is GridEditFormInsertItem) ? "PerformInsert" : "Update" %>'>                                    </asp:Button>                                    <asp:Button ID="Button2" runat="server" Text="Cancel" CausesValidation="false" CommandName="Cancel"></asp:Button>                                </td>                            </tr>                        </table>                        </FormTemplate>                    </EditFormSettings>                                 <PagerStyle Position="TopAndBottom" />                </MasterTableView>            </telerik:RadGrid>                <asp:SqlDataSource ID="SqlDataSource3" runat="server" ConnectionString="<%$ ConnectionStrings:SugarSandsConnectionString %>"                                SelectCommand="SELECT [MenuId], [MenuText] FROM [tbl_menu] ORDER BY [MenuText]"></asp:SqlDataSource>                                 <br />                <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:SugarSandsConnectionString %>"                 SelectCommand="SELECT * FROM [tbl_pdf_docs] ORDER BY [s_page]" DeleteCommand="DELETE FROM [tbl_pdf_docs] WHERE [id] = @id"                 InsertCommand="INSERT INTO [tbl_pdf_docs] ([s_page], [s_doc_title], [s_link_title], [s_doc_url], [d_date_uploaded], [d_date_displayed], [b_visible]) VALUES (@s_page, @s_doc_title, @s_link_title, @s_doc_url, @d_date_uploaded, @d_date_displayed, @b_visible)"                                  UpdateCommand="UPDATE [tbl_pdf_docs] SET [s_page] = @s_page, [s_doc_title] = @s_doc_title, [s_doc_url] = @s_doc_url, [d_date_uploaded] = @d_date_uploaded, [d_date_displayed] = @d_date_displayed, [b_visible] = @b_visible WHERE [id] = @id">                <DeleteParameters>                    <asp:Parameter Name="id" Type="Int32" />                </DeleteParameters>                <InsertParameters>                    <asp:Parameter Name="s_page" Type="String" />                    <asp:Parameter Name="s_doc_title" Type="String" />                    <asp:Parameter Name="s_doc_url" Type="String" />                    <asp:Parameter Name="d_date_uploaded" Type="DateTime" />                    <asp:Parameter Name="d_date_displayed" Type="DateTime" />                    <asp:Parameter Name="b_visible" Type="Boolean" />                </InsertParameters>                <UpdateParameters>                    <asp:Parameter Name="s_page" Type="String" />                    <asp:Parameter Name="s_doc_title" Type="String" />                    <asp:Parameter Name="s_doc_url" Type="String" />                    <asp:Parameter Name="d_date_uploaded" Type="DateTime" />                    <asp:Parameter Name="d_date_displayed" Type="DateTime" />                    <asp:Parameter Name="b_visible" Type="Boolean" />                    <asp:Parameter Name="id" Type="Int32" />                </UpdateParameters>            </asp:SqlDataSource>                     </td>    </tr>    <telerik:RadAjaxManager runat="server">        <AjaxSettings>            <telerik:AjaxSetting AjaxControlID="RadGrid1">            </telerik:AjaxSetting>            <telerik:AjaxSetting AjaxControlID="SqlDataSource1">                <UpdatedControls>                    <telerik:AjaxUpdatedControl ControlID="RadGrid1" />                    <telerik:AjaxUpdatedControl ControlID="SqlDataSource1" />                </UpdatedControls>            </telerik:AjaxSetting>        </AjaxSettings>    </telerik:RadAjaxManager>protected void RadGrid1_ItemUpdated(object source, Telerik.Web.UI.GridUpdatedEventArgs e)    {        if (e.Exception != null)        {            e.KeepInEditMode = true;            e.ExceptionHandled = true;            DisplayMessage(true, "Title " + e.Item.OwnerTableView.DataKeyValues[e.Item.ItemIndex]["s_doc_title"] + " cannot be updated. Reason: " + e.Exception.Message);        }        else        {            DisplayMessage(false, "Title " + e.Item.OwnerTableView.DataKeyValues[e.Item.ItemIndex]["s_doc_title"] + " updated");        }    }    protected void RadGrid1_ItemInserted(object source, GridInsertedEventArgs e)    {        if (e.Exception != null)        {            e.ExceptionHandled = true;            e.KeepInInsertMode = true;            DisplayMessage(true, "Title cannot be inserted. Reason: " + e.Exception.Message);        }        else        {            DisplayMessage(false, "Title inserted");        }    }    protected void RadGrid1_ItemDeleted(object source, GridDeletedEventArgs e)    {        if (e.Exception != null)        {            e.ExceptionHandled = true;            DisplayMessage(true, "Title " + e.Item.OwnerTableView.DataKeyValues[e.Item.ItemIndex]["s_doc_title"] + " cannot be deleted. Reason: " + e.Exception.Message);        }        else        {            DisplayMessage(false, "Title " + e.Item.OwnerTableView.DataKeyValues[e.Item.ItemIndex]["s_doc_title"] + " deleted");        }    }    private void DisplayMessage(bool isError, string text)    {        Label label = (isError) ? this.Label1 : this.Label2;        label.Text = text;    }    private static DataTable tblData = new DataTable();    protected void Page_Load(object sender, System.EventArgs e)    {             }    //protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)    //{    //    if (e.CommandName == "Update")    //    {    //        GridEditFormItem gridEditFormItem = (GridEditFormItem)e.Item;    //        Label label = (Label)gridEditFormItem.FindControl("lbl_id");    //        TextBox textboxPage = (TextBox)gridEditFormItem.FindControl("s_page");    //        TextBox textboxDocTitle = (TextBox)gridEditFormItem.FindControl("s_doc_title");    //        TextBox textboxLinkTitle = (TextBox)gridEditFormItem.FindControl("s_link_title");    //        TextBox textboxDocUrl = (TextBox)gridEditFormItem.FindControl("s_doc_url");    //        TextBox textboxDateUp = (TextBox)gridEditFormItem.FindControl("d_date_uploaded");    //        TextBox textboxDateDisplay = (TextBox)gridEditFormItem.FindControl("d_date_displayed");    //        SqlDataSource1.UpdateCommand = "UPDATE [tbl_pdf_docs] SET [s_page] = @s_page, [s_doc_title] = @s_doc_title, [s_doc_url] = @s_doc_url, [d_date_uploaded] = @d_date_uploaded, [d_date_displayed] = @d_date_displayed WHERE id= @lbl_id";    //        SqlDataSource1.Update();    //    }     //    if (e.CommandName == RadGrid.InitInsertCommandName) //"Add new" button clicked    //    {    //        GridEditCommandColumn editColumn = (GridEditCommandColumn)RadGrid1.MasterTableView.GetColumn("EditCommandColumn");    //        editColumn.Visible = false;    //        e.Canceled = true;    //        e.Item.OwnerTableView.InsertItem();    //        GridEditableItem insertedItem = e.Item.OwnerTableView.GetInsertItem();    //        TextBox box = insertedItem.FindControl("txt_company_id") as TextBox;    //        box.Text = Request.QueryString["id"].ToString();    //    }    //    else if (e.CommandName == RadGrid.RebindGridCommandName && e.Item.OwnerTableView.IsItemInserted)    //    {    //        e.Canceled = true;    //    }    //    else    //    {    //        GridEditCommandColumn editColumn = (GridEditCommandColumn)RadGrid1.MasterTableView.GetColumn("EditCommandColumn");    //        if (!editColumn.Visible)    //            editColumn.Visible = true;    //    }    //}         protected void btn_pdf_upload_Click(object sender, EventArgs e)    {                 Response.Redirect("pdf_file_upload.aspx");    }    protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)    {        //if (e.Item is GridEditFormItem && e.Item.IsInEditMode)        //{        //    GridEditFormItem editform = (GridEditFormItem)e.Item;        //    RadComboBox ddl_menu_items = (RadComboBox)editform.FindControl("RadComboBox1");        //    //Populate the dropdownlist         //    SqlCommand cmd = new SqlCommand("SELECT [MenuId], [MenuText] FROM [tbl_menu] ORDER BY [MenuText]", new SqlConnection(ConfigurationManager.AppSettings["SugarSandsConnectionString"]));        //    cmd.Connection.Open();        //    SqlDataReader ddlValues;        //    ddlValues = cmd.ExecuteReader();        //    ddl_menu_items.DataSource = ddlValues;        //    ddl_menu_items.DataValueField = "MenuId";        //    ddl_menu_items.DataTextField = "MenuText";        //    ddl_menu_items.DataBind();        //    cmd.Connection.Close();        //    cmd.Connection.Dispose();        //}    }