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POTrouble binding SelectedItem in ViewModel - MVVM Light Silverlight 4
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  1. POTrouble binding SelectedItem in ViewModel - MVVM Light Silverlight 4
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    copied!<p>I am using SL4 with MVVM-Light Toolkit. I'm not sure what's going on here. I can't seem to find anything on the web that resolves this issue.. I have a user control that I incorporate into my MainPage.xaml using standard xmlns:local="clr-namespace:WorkOrder.Views" syntax, with a call to local:ListWorkOrdersView further down my page. Using a RelayCommand, I animate in that ListWorkOrdersView window when I click a "List Work Orders" button.</p> <p>I have bound the data on ListWorkOrdersView to an ObservableCollection of test data (for blendibility). What I want to do is bind the SelectedItem of that RadGridView to a property in my ViewModel. If I place a breakpoint on the getter of the SelectedWO property, it fires when I load the control, but the breakpoint is NOT hit if I move it to the setter. Relevant code: </p> <p>ListWorkOrdersView.xaml</p> <pre><code>&lt;UserControl xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="WorkOrder.Views.ListWorkOrdersView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" xmlns:GalaSoft_MvvmLight_Command="clr-namespace:GalaSoft.MvvmLight.Command; assembly=GalaSoft.MvvmLight.Extras.SL4" xmlns:System="clr-namespace:System;assembly=mscorlib" xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions" mc:Ignorable="d" DataContext="{Binding ListWorkOrders, Source={StaticResource Locator}}"&gt; &lt;Grid x:Name="master" DataContext="{Binding ListWorkOrders, Source={StaticResource Locator}}"&gt; &lt;telerik:RadGridView x:Name="gvListWO" IsReadOnly="True" AutoGenerateColumns="False" DataContext="{Binding wo}" SelectedItem="{Binding ElementName=master, Path=DataContext.SelectedWO, Mode=TwoWay}" Grid.ColumnSpan="2" Width="440" Height="330" ItemsSource="{Binding}"&gt; &lt;telerik:RadGridView.Columns&gt; &lt;telerik:GridViewDataColumn DataMemberBinding="{Binding WORK_ORDER_NUMBER}" Header="Work Order Number"/&gt; &lt;telerik:GridViewDataColumn DataMemberBinding="{Binding PROPOSED_BY}" Header="Proposed By"/&gt; &lt;telerik:GridViewDataColumn DataMemberBinding="{Binding DATE_PROPOSED}" Header="Date Proposed"/&gt; &lt;/telerik:RadGridView.Columns&gt; &lt;/telerik:RadGridView&gt; &lt;/Grid&gt; &lt;/UserControl&gt; </code></pre> <p>Relevant ListWorkOrdersViewModel.cs(removed code for databinding the gridview itself)</p> <pre><code>using GalaSoft.MvvmLight; using GalaSoft.MvvmLight.Command; using GalaSoft.MvvmLight.Messaging; using WorkOrder.Model; using System.Collections.ObjectModel; using System.Collections.Generic; using System; namespace WorkOrder.ViewModel { public class ListWorkOrdersViewModel : ViewModelBase { public const string SelectedWOPropertyName = "SelectedWO"; private ObservableCollection&lt;BWorkOrder&gt; _selectedWO; public ObservableCollection&lt;BWorkOrder&gt; SelectedWO { get { return _selectedWO; } set { if (_selectedWO == value) return; _selectedWO = value; RaisePropertyChanged(SelectedWOPropertyName); } } } } </code></pre> <p>Any ideas on why this isn't binding properly? I'm totally at a loss!</p>
 

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