Lack of event handling in DataGrid

Question

I have a 2 DataGrids. The first column of each datagrid is the name of a person. I have defined the column as such :

                                    <DataGridTemplateColumn  Header="Name">
                                        <DataGridTemplateColumn.CellTemplate>
                                            <DataTemplate>
                                                <TextBlock Text="{Binding Name}">
                                                    <TextBlock.ContextMenu>
                                                        <ContextMenu>
                                                            <MenuItem Header="Go to Player" Click="LetsGoToPlayer"></MenuItem>
                                                        </ContextMenu>
                                                    </TextBlock.ContextMenu>
                                                </TextBlock>
                                            </DataTemplate>
                                        </DataGridTemplateColumn.CellTemplate>
                                    </DataGridTemplateColumn>

This works (I will tell the problem after I show the second definition).

The second definition is :

                                            <DataGridTemplateColumn Header="Name">
                                                <DataGridTemplateColumn.CellTemplate>
                                                    <DataTemplate>
                                                        <Button Click="SampleClick">
                                                            <Button.Content>
                                                                <TextBlock Text="{Binding Name}">
                                                                    <TextBlock.ContextMenu>
                                                                        <ContextMenu>
                                                                            <MenuItem Header="Go to Player" Click="doti"></MenuItem>
                                                                        </ContextMenu>
                                                                    </TextBlock.ContextMenu>
                                                                </TextBlock>
                                                            </Button.Content>
                                                        </Button>
                                                        <!--<TextBlock Text="{Binding Name}">
                                                            <TextBlock.ContextMenu>
                                                                <ContextMenu>
                                                                    <MenuItem Header="Go to Player" Click="doti"></MenuItem>
                                                                </ContextMenu>
                                                            </TextBlock.ContextMenu>
                                                        </TextBlock>-->
                                                    </DataTemplate>
                                                </DataGridTemplateColumn.CellTemplate>
                                            </DataGridTemplateColumn>

As you can see the second one (which doesn't work) had just a textblock and was changed to a button just for testing.

The problem is that the first one works in that the context menu on the textblock is called. The second one does not work. The context menu when the column is defined just as a textblock is not called. When I changed it to a button the click event is never called.

Now the first one (working) displays the context menu right away when right clicked but the second one does not. To get the context menu to even show you need to select an item from the datagrid and then another and back to the one you want before the context menu will even show up.

The definition of the datagrid (working) is:

                            <DataGrid Grid.Row="1" ItemsSource="{Binding SkaterStats,NotifyOnSourceUpdated=True ,NotifyOnTargetUpdated=True}"
                                            CanUserAddRows="False" IsReadOnly="True" FrozenColumnCount="1" 
                                          AutoGenerateColumns="False" Margin="0,0,0,20" Sorting="DataGrid_Sorting" TargetUpdated="DataGrid_TargetUpdated">

The defintion of the datagrid that has problems is :

                                    <DataGrid ItemsSource="{Binding SkaterStats,NotifyOnSourceUpdated=True ,NotifyOnTargetUpdated=True}"
                                        CanUserAddRows="False" IsReadOnly="True" FrozenColumnCount="2" ScrollViewer.CanContentScroll="False" 
                                        AutoGenerateColumns="False" Margin="0,0,0,20" 
                                        Sorting="DataGrid_Sorting" TargetUpdated="DataGrid_TargetUpdated" LoadingRow="theLoadingRow">

Any ideas what might be causing the problem?

Answer 1

I used your code to make a demo, and both of DataGrid work well.
Code for Xaml:

<Window.DataContext>  
        <local:viewModel></local:viewModel>  
    </Window.DataContext>  
    <Grid>  
        <Grid.RowDefinitions>  
            <RowDefinition/>  
            <RowDefinition/>  
        </Grid.RowDefinitions>  
        <DataGrid  Grid.Row="0" ItemsSource="{Binding SkaterStats,NotifyOnSourceUpdated=True ,NotifyOnTargetUpdated=True}"  
                                             CanUserAddRows="False" IsReadOnly="True" FrozenColumnCount="1"   
                                           AutoGenerateColumns="False" Margin="0,0,0,20" Sorting="DataGrid_Sorting" TargetUpdated="DataGrid_TargetUpdated">  
            <DataGrid.Columns>  
                <DataGridTemplateColumn  Header="Name">  
                    <DataGridTemplateColumn.CellTemplate>  
                        <DataTemplate>  
                            <TextBlock Text="{Binding Name}">  
                                <TextBlock.ContextMenu>  
                                    <ContextMenu>  
                                        <MenuItem Header="Go to Player" Click="LetsGoToPlayer"></MenuItem>  
                                    </ContextMenu>  
                                </TextBlock.ContextMenu></TextBlock>  
                        </DataTemplate>  
                    </DataGridTemplateColumn.CellTemplate>  
                </DataGridTemplateColumn>  
            </DataGrid.Columns>  
        </DataGrid>  
        <DataGrid Grid.Row="1" ItemsSource="{Binding SkaterStats,NotifyOnSourceUpdated=True ,NotifyOnTargetUpdated=True}"  
                                         CanUserAddRows="False" IsReadOnly="True" FrozenColumnCount="2" ScrollViewer.CanContentScroll="False"   
                                         AutoGenerateColumns="False" Margin="0,0,0,20"   
                                         Sorting="DataGrid_Sorting" TargetUpdated="DataGrid_TargetUpdated" LoadingRow="theLoadingRow">  
  
                <DataGrid.Columns>  
                <DataGridTemplateColumn Header="Name">  
                    <DataGridTemplateColumn.CellTemplate>  
                        <DataTemplate>  
                            <Button>  
                                <Button.Content>  
                                    <TextBlock Text="{Binding Name}">  
                                        <TextBlock.ContextMenu>  
                                            <ContextMenu>  
                                                <MenuItem Header="Go to Player" Click="doti"></MenuItem>  
                                            </ContextMenu>  
                                        </TextBlock.ContextMenu>  
                                    </TextBlock>  
                                </Button.Content>  
                            </Button>  
                        </DataTemplate>  
                    </DataGridTemplateColumn.CellTemplate>  
                </DataGridTemplateColumn>  
            </DataGrid.Columns>  
        </DataGrid>  
    </Grid>  

The cs code is:

 public class viewModel  
    {  
        public ObservableCollection<SkaterState> SkaterStats { get; set; } = new ObservableCollection<SkaterState>();  
  
        public viewModel()  
        {  
            SkaterStats = new ObservableCollection<SkaterState>();  
            SkaterStats.Add(new SkaterState() { ID = 1, Name = "a", State = "0" });  
            SkaterStats.Add(new SkaterState() { ID = 2, Name = "aa", State = "1" });  
        }  
    }  
    public class SkaterState  
    {  
        public SkaterState() { }  
        public int ID { get; set; }  
        public string Name { get; set; }  
        public string State { get; set; }  
  
    }  

The result picture is:

Does my demo work for you? If it doesn't, did I miss any step or code to reproduce your error?

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