DatagridTemplateColumn with triggers failed to bind - wpf

Question

I have a datagrid that contain of the 2 columns and I would like to show some of cells in column#2 to be:
ComboBox
TextBox
based on property
code :
Solution #1 :
<Window.Resources>
<DataTemplate x:Key="DropDownTemplate">
<StackPanel>
<ComboBox SelectedValuePath="Id" DisplayMemberPath="Name" ItemsSource="{Binding MarketConfigurationLOVs, UpdateSourceTrigger=PropertyChanged}"/>
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="TextBoxTemplate">
<StackPanel>
<TextBox Text="{Binding ConfigurationValue, UpdateSourceTrigger=PropertyChanged}" />
</StackPanel>
</DataTemplate>
</Window.Resources>
Here the datagrid tags :
<DataGrid ItemsSource="{Binding Path= MarketConfigurationValues,Mode=TwoWay}" HeadersVisibility="None" AutoGenerateColumns="False" CanUserAddRows="False">
<DataGrid.Columns>
<DataGridTextColumn Width="120" Binding="{Binding Path= ConfigurationName}" />
<DataGridTemplateColumn>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ContentControl Content="{Binding}" >
<ContentControl.Style>
<Style TargetType="ContentControl">
<Style.Triggers>
<DataTrigger Binding="{Binding HasLOV}" Value="true">
<Setter Property="ContentTemplate" Value="{StaticResource DropDownTemplate}" />
</DataTrigger>
<DataTrigger Binding="{Binding HasLOV}" Value="false">
<Setter Property="ContentTemplate" Value="{StaticResource TextBoxTemplate}" />
</DataTrigger>
<!-- and so on -->
</Style.Triggers>
</Style>
</ContentControl.Style>
</ContentControl>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
this failed to show actual value as it show the name of property and always show cell in dropdown and when I swapped the TextBoxContentTemplate with ComboBoxContentTemplate it show all cells as textBox so it seem it ignore the trigger however when I debug I found the HasLOV some items contain true and some contain false
Solution #2 : (also failed) Reference : Jon solution from the following post WPF MVVM Creating Dynamic controls
<DataGridTemplateColumn>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ContentControl x:Name="MyContentControl" Content="{Binding}" />
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding HasLOV}" Value="false">
<Setter TargetName="MyContentControl" Property="ContentTemplate" Value="{StaticResource TextBoxTemplate}" />
</DataTrigger>
<DataTrigger Binding="{Binding HasLOV}" Value="true">
<Setter TargetName="MyContentControl" Property="ContentTemplate" Value="{StaticResource DropDownTemplate}" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
ViewModel is big class but I pulled here the main parts related to my problem . In constructor I created list of MarketConfigurationValue and I filled values inside MarketConfigurationLOVs in case if I set HasLov=true and I filled value in configurationValue in case if I set HasLov=false and I run the application and in debug mode I found the main object List contain what I said correctly but it failed to show comboBox in case HasLov=true and textBox in case HasLov=false :
public class MarketConfigurationValue
{
public string ConfigurationName { get; set; }
public string ConfigurationValue { get; set; }
public int ConfigurationValueId { get; set; }
public List<Market_Config_Lov> MarketConfigurationLOVs {get;set;}
public bool HasLov { get; set; }
}
public class Market_Config_Lov
{
public virtual string Name { get; set; }
public virtual int Sequence { get; set; }
}
Can you please help ?

Answer 1

Here's how you implement the INotifyPropertyChanged Interface. With this the binding updates itself when the setter of HasLOV is called.
public class MarketConfigurationValue:INotifyPropertyChanged
{
private bool _hasLOV;
public bool HasLOV
{
get {return _hasLOV;}
set {_hasLOV = value; OnPropertyChanged("HasLOV");}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
VerifyPropertyName(propertyName);
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
var e = new PropertyChangedEventArgs(propertyName);
handler(this, e);
}
}
}
Hope this helps.
====>The property name is typo as the property in class called : HasLov and in XAML called HasLOV .