Home/ Questions/Q 8108369
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-06T01:05:20+00:00

Here’s the XAML structure. You’ll see below that I’m subscribing to the Loaded event

  • 0

Here’s the XAML structure. You’ll see below that I’m subscribing to the Loaded event of the grid. But when the even fires, this.selectionGrid is still null – even in consequent layout updates it is still null, even though I can see the grid all populated.

I do use MEFedMVVM and MvvmLight, but I don’t see how it relates to this situation.

Any ideas why?

<Grid x:Name="LayoutRoot" Margin="2">
    <toolkit:BusyIndicator IsBusy="{Binding IsBusy}">
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition />
                <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>
            <ContentPresenter
                    Visibility="{Binding Path=CurrentStep,Converter={StaticResource IntToVisibilityConverter}, ConverterParameter=1}">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto" />
                        <RowDefinition />
                    </Grid.RowDefinitions>
                    <TextBlock Text="Select Equipment" Style="{StaticResource HeaderBlockStyle}" /> 
                    <ScrollViewer Grid.Row="1">
                        <sdk:DataGrid x:Name="selectionGrid" GridLinesVisibility="All" AlternatingRowBackground="White" ItemsSource="{Binding Path=AvailableEquipmentView}" AreRowDetailsFrozen="True" 
                                AutoGenerateColumns="False" SelectionMode="Extended" RowDetailsVisibilityMode="Visible" LayoutUpdated="selectionGrid_LayoutUpdated" Loaded="selectionGrid_Loaded" LoadingRowGroup="selectionGrid_LoadingRowGroup">
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    You should remove the ContentPresenter. ContentPresenter are intended to display their Content property and not “manual” children.

    I would also mention that you do not need to place controls into the BusyIndicator. The BusyIndicator will fill all available space so place it at the “bottom” of the Grid (below all other controls in xaml)

    <Grid x:Name="LayoutRoot" Margin="2">
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <Grid Visibility="{Binding Path=CurrentStep,Converter={StaticResource IntToVisibilityConverter}, ConverterParameter=1}">
        <Grid.RowDefinitions>
             <RowDefinition Height="Auto" />
              <RowDefinition />
        </Grid.RowDefinitions>
        <TextBlock Text="Select Equipment" Style="{StaticResource HeaderBlockStyle}" /> 
        <ScrollViewer Grid.Row="1">
            <sdk:DataGrid x:Name="selectionGrid" GridLinesVisibility="All" AlternatingRowBackground="White" 
                          ItemsSource="{Binding Path=AvailableEquipmentView}" AreRowDetailsFrozen="True" 
                          AutoGenerateColumns="False" SelectionMode="Extended" RowDetailsVisibilityMode="Visible" 
                          LayoutUpdated="selectionGrid_LayoutUpdated" Loaded="selectionGrid_Loaded" 
                          LoadingRowGroup="selectionGrid_LoadingRowGroup">
    <! -- Other controls -->
    <toolkit:BusyIndicator IsBusy="{Binding IsBusy}">
</Grid>
    • 0