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POUpdate source in datagrid via selection from combo box
 

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    <p>I am new to WPF and the MVVM design pattern. Consequently, everything I try to do seems to take a long time. </p> <p>Currently I am using a combobox to select a list. I want to populate a gridview with all the contacts that are in that list and to refresh that gridview every time the combobox selection changes. </p> <p>The XAML for the view follows. How can I get the gridview to listen for a change in the combobox selection? I need the combobox selection to set it's property so that I can query the db to return those records associated with the list so my first thought was to add a button to fire the command but it never fires. I have read on google where it says the gridview should listen for the propertyupdated but no sample on just how to do that.</p> <p>I tried this in the gridview but throws an exception and yes my viewmodel does implement INotifyProperyChanged</p> <p>PropertyChanged="{Binding Path=SelectedListNameContactView}</p> <p>Your help is appreciated. </p> <pre><code> &lt;UserControl x:Name="manageLists" x:Class="Five9ContactManagement.ManageListsView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" xmlns:my="clr-namespace:Five9ContactManagement.Controls;assembly=Five9ContactManagement.Controls" mc:Ignorable="d" d:DesignHeight="400" d:DesignWidth="400" xmlns:local="clr-namespace:Five9ContactManagement" &gt; &lt;Grid &gt; &lt;Grid HorizontalAlignment="Center" VerticalAlignment="Top" Margin="20"&gt; &lt;Grid.ColumnDefinitions&gt; &lt;ColumnDefinition /&gt; &lt;ColumnDefinition /&gt; &lt;ColumnDefinition /&gt; &lt;/Grid.ColumnDefinitions&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition /&gt; &lt;RowDefinition/&gt; &lt;RowDefinition /&gt; &lt;/Grid.RowDefinitions&gt; &lt;TextBlock Grid.Column="0" Grid.Row="2" Text="Select List " VerticalAlignment="Center" Margin="5" /&gt; &lt;ComboBox Grid.Column="1" Grid.Row="2" ItemsSource="{Binding GetLists, Mode=OneWay}" VerticalAlignment="Center" SelectedIndex="-1" SelectedItem="{Binding Path=SelectedListNameContactView /&gt; &lt;Button Grid.Row="2" Grid.Column="2" Content="View Contacts" VerticalAlignment="Center" Margin="5" Width="100" Command="{Binding Path=ShowContactsCommand}" CommandParameter="{Binding SelectedListNameContactView}"/&gt; &lt;/Grid&gt; &lt;Grid HorizontalAlignment="Center" VerticalAlignment="Center" Margin="20" RenderTransformOrigin="1.25,2.662"&gt; &lt;telerik:RadGridView x:Name="contactsGrid" GroupRenderMode="Flat" ItemsSource="{Binding Contacts}" PropertyChanged="{Binding Path=SelectedListNameContactView} AutoGenerateColumns="False" CanUserFreezeColumns="False" RowIndicatorVisibility="Collapsed" CanUserResizeColumns="True" Margin="5,5,5,5" IsReadOnly="True" &gt; &lt;telerik:RadGridView.Columns&gt; &lt;telerik:GridViewDataColumn Header="First Name" DataMemberBinding="{Binding FirstName}" Width="100" /&gt; &lt;telerik:GridViewDataColumn Header="Last Name" DataMemberBinding="{Binding LastName}" Width="100"/&gt; &lt;telerik:GridViewDataColumn Header="Address" DataMemberBinding="{Binding Address}" Width="200"/&gt; &lt;telerik:GridViewDataColumn Header="Address2" DataMemberBinding="{Binding Address2}" Width="75"/&gt; &lt;telerik:GridViewDataColumn Header="City" DataMemberBinding="{Binding City}" Width="75"/&gt; &lt;telerik:GridViewDataColumn Header="State" DataMemberBinding="{Binding State}" /&gt; &lt;telerik:GridViewDataColumn Header="Zip" DataMemberBinding="{Binding ZipCode}" Width="75"/&gt; &lt;telerik:GridViewDataColumn Header="Phone" DataMemberBinding="{Binding PhoneNumber}" Width="75"/&gt; &lt;telerik:GridViewDataColumn Header="Media Group" DataMemberBinding="{Binding MediaGroup}" Width="100"/&gt; &lt;telerik:GridViewDataColumn Header="Brochure Date" DataMemberBinding="{Binding BrochureDate}" Width="100"/&gt; &lt;/telerik:RadGridView.Columns&gt; &lt;/telerik:RadGridView&gt; &lt;/Grid&gt; &lt;/Grid&gt; </code></pre> <p></p>
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