How To Use RadWindow As A Dialog For GridEditing Using A DetailsView

[jgill]

Hello,
I am having some trouble getting a details view with a RadCombobox to work in a RadWindow that functions an an Edit Dialog for a Radgrid.  I am using the following example as a base: http://demos.telerik.com/aspnet-ajax/controls/examples/integration/gridandwindow/defaultcs.aspx?product=window

Essentially I am trying to do the same thing as the example, but my DetailsView contains a RadCombobox as one of the fields in the edit dialog.  I am having a problem with a combobox (aka drop down list) retaining the selected item in a scenario where the details view is wrapped as a user control then loaded onto the page.   The problem seems to be with using the RadCombobox in the DetailsView while also allowing the user to change the value.

-      I have two user controls that each contains a DetailsView with a dropdownlist as a template field in the DetailsView
     o      The dropdown triggers a postback which raises an event that the page then uses to determine which user control to load depending on the value selected in the dropdown.
-      I load one of the two different user controls onto the page depending on the value of the selected item in the dropdownlist.
     o      This seems to be working correctly as the correct user control loads depending on which value is selected in the dropdownlist within the user control
-      Problem: However, after loading a different usercontrol/DetailsView the selected item of the drop down list is not retained (E.g. even though the correct user control/details view loaded the dropdownlist is not remembering the previously selected value).  So while the correct user control loads the selected value in the dropdown is not retained.

Any help would be appreciated.

ASPX Markup

<%@ Control Language="VB" AutoEventWireup="false" CodeFile="ItemBuilderSimpleItem.ascx.vb" Inherits="admin_UserControls_App_ItemBuilderSimpleItem" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False"

DataKeyNames="ItemID" DataSourceID="SqlDataSource1" BorderWidth="0" CellPadding="0" CellSpacing="7">

<Fields>

<asp:TemplateField HeaderText="<%$Resources: Config, ItemType %>" SortExpression="ItemTypeID">

<EditItemTemplate>

<telerik:RadComboBox ID="cboItemTypesDropdown" OnSelectedIndexChanged="ItemType_SelectedIndexChanged" runat="server" DataSourceID="SqlDataSource2"

DataTextField="Alias"

DataValueField="ItemTypeID"

SelectedValue='<%#Bind("ItemTypeID") %>' AutoPostBack="true" Width="350px">

</telerik:RadComboBox>

</EditItemTemplate>

<ItemTemplate>

<asp:Label Runat="server" Text='<%# Bind("ItemTypeID") %>' ID="lblItemTypeID"></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField DataField="Alias" HeaderText="<%$Resources: Config, Alias %>" SortExpression="Alias" ControlStyle-Width="350px" />

<asp:CheckBoxField DataField="IsActive" HeaderText="<%$Resources: Config, IsActive %>" SortExpression="IsActive" />

<asp:CommandField ShowEditButton="True" EditText="<%$Resources: Config, Update %>"/>

<asp:CommandField ShowInsertButton="True" InsertText="<%$Resources: Config, Add %>"/>

<asp:CommandField ShowDeleteButton="True" DeleteText="<%$Resources: Config, Delete %>" />

</Fields>

</asp:DetailsView>

<br />

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:connApp_PRD %>"  DeleteCommand="proc_ConfigItems_Delete"  DeleteCommandType="StoredProcedure"  InsertCommand="proc_ConfigItems_Add"  InsertCommandType="StoredProcedure"  SelectCommand="proc_ConfigItems_GetItemByItemID"  SelectCommandType="StoredProcedure"  UpdateCommand="proc_ConfigItems_Update"  UpdateCommandType="StoredProcedure">

<DeleteParameters>

<asp:Parameter Name="ItemID" Type="Int64" />

</DeleteParameters>

<UpdateParameters>

<asp:Parameter Name="ItemID" Type="Int64" />

<asp:Parameter Name="ItemTypeID" Type="Int64" />

<asp:Parameter Name="Alias" Type="String" />

<asp:Parameter Name="IsActive" Type="Boolean" />

</UpdateParameters>

<InsertParameters>

<asp:Parameter Name="ItemTypeID" Type="Int64" />

<asp:Parameter Name="Alias" Type="String" />

<asp:Parameter Name="IsActive" Type="Boolean" />

</InsertParameters>

<SelectParameters>

<asp:QueryStringParameter Name="ItemID" QueryStringField="ItemID" Type="Int64" />

</SelectParameters>

</asp:SqlDataSource>

<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:connApp_PRD %>"

SelectCommand="proc_ItemTypes_GetAllItemTypes" SelectCommandType="StoredProcedure">

</asp:SqlDataSource>

VB.NET Codebehind

Imports System
Imports System.Data
Imports System.Collections
Imports System.Web.UI
Imports Telerik.Web.UI

Imports Microsoft.ApplicationBlocks.Data
Imports System.Configuration
Imports System.Data.SqlClient
Imports JG.App.Core

Partial Class admin_UserControls_App_ItemBuilderSimpleItem
    Inherits System.Web.UI.UserControl
    Implements IItemBuilder

    Private _ItemType As Integer

    'Moved delegate to interface definition
    'Public Delegate Sub ItemTypeChangedHandler(ByVal sender As Object, ByVal e As ItemTypeChangedEventArgs)
    Public Event ItemTypeChanged(ByVal sender As Object, ByVal e As ItemTypeChangedEventArgs) Implements IItemBuilder.ItemTypeChanged

        Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
        If Page.Request.QueryString("ItemID") Is Nothing Then
            DetailsView1.DefaultMode = DetailsViewMode.Insert
        Else
            DetailsView1.DefaultMode = DetailsViewMode.Edit
        End If

    End Sub

    'Add a method that resembles default methods to handle the Item type changing
    Protected Sub ItemType_SelectedIndexChanged(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs)
        Dim control As RadComboBox = ControlUtility.Instance.FindControlRecursive("cboItemTypesDropdown")

        If Not IsNothing(control) Then
            ItemType = control.SelectedValue
        End If
    End Sub


    Public Property ItemType() As Integer Implements IItemBuilder.ItemType
        Get
            Dim control As RadComboBox = ControlUtility.Instance.FindControlRecursive("cboItemTypesDropdown")
            If Not IsNothing(control) Then
                If control.SelectedItem.Value = String.Empty Then
                    control.SelectedIndex = -1
                    _ItemType = Nothing
                    MsgBox("Nothing")
                Else
                    _ItemType = control.SelectedItem.Value
                    MsgBox("2 selected item: " & _ItemType.ToString)
                End If

                MsgBox("3 selected item: " & _ItemType.ToString)

                Return _ItemType
            End If

        End Get
        Set(ByVal Value As Integer)
            Dim control As RadComboBox = ControlUtility.Instance.FindControlRecursive("cboItemTypesDropdown")
            If Not IsNothing(control) Then
                If Not IsNothing(control.Items.FindItemByValue(Value)) Then
                    control.Items.FindItemByValue(Value).Selected = True
                    _ItemType = Value
                    MsgBox("Do I ever get here?" & _ItemType)
                    OnItemTypeChanged()
                End If
            End If
        End Set
    End Property


    Protected Sub OnItemTypeChanged()
        RaiseEvent ItemTypeChanged(Me, New ItemTypeChangedEventArgs(_ItemType))
    End Sub

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim control As RadComboBox = ControlUtility.Instance.FindControlRecursive("cboItemTypesDropdown")
        If Not IsNothing(control) Then
            If Not IsNothing(control.Items.FindItemByValue(ItemType)) Then
                control.Items.FindItemByValue(ItemType).Selected = True
            End If
        End If
    End Sub
End Class

[Fiko]

Hello Jonathan,

I am afraid that the provided information is not enough for me to determine what might be the reason for the problem. I am not quite sure what control is returned by the ControlUtility.Instance.FindControlRecursive method. Also the code bellow should throw an exception when it is executed:

ItemType = control.SelectedValue

because the ItemType property is of type Integer, but the control.SelectedValue returns a string.
Could you please open a new support ticket and send me a runnable project that shows your setup, including detailed explanation of the expected behavior? I will check it and do my best to provide a working solution.

Greetings,
Fiko
the Telerik team

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