Lots of errors occurs when sliding the datagrid scrollbar.

[Sade686]

Bug explanation

Lots of errors occurs when sliding the datagrid scrollbar. *like： 14:45:19:102 System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.DataGridRow', AncestorLevel='1''. BindingExpression:Path=Foreground; DataItem=null; target element is 'DataGridCell' (Name=''); target property is 'Foreground' (type 'Brush') 14:45:19:102 System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.DataGrid', AncestorLevel='1''. BindingExpression:Path=HorizontalGridLinesBrush; DataItem=null; target element is 'DataGridRowHeader' (Name=''); target property is 'BorderBrush' (type 'Brush') 14:45:19:102 System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.DataGrid', AncestorLevel='1''. BindingExpression:Path=GridLinesVisibility; DataItem=null; target element is 'DataGridRowHeader' (Name=''); target property is 'BorderThickness' (type 'Thickness') *follow is my xaml <UserControl x:Class="VPro.Views.Dock.LogView" 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:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" d:DesignHeight="450" d:DesignWidth="800" mc:Ignorable="d"> <UserControl.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <materialDesign:BundledTheme BaseTheme="Light" PrimaryColor="DeepPurple" SecondaryColor="Lime" /> <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesign3.Defaults.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </UserControl.Resources> <Grid> <Grid.RowDefinitions> <RowDefinition Height="auto" /> <RowDefinition /> </Grid.RowDefinitions> <!--<StackPanel Margin="0,2,0,2" Orientation="Horizontal">

        <RadioButton
            Margin="4"
            BorderBrush="{DynamicResource PrimaryBrush}"
            IsChecked="{Binding InfoFilter}"
            Style="{StaticResource MaterialDesignTabRadioButton}">
            <StackPanel Orientation="Horizontal">
                <Image
                    Width="16"
                    Height="16"
                    Source="/Assets/Images/Info.png" />
                <TextBlock
                    Margin="5,0"
                    VerticalAlignment="Center"
                    Foreground="Black">
                    <Run Text="Info" />
                    <Run Text="{Binding InfoCount}" />
                </TextBlock>
            </StackPanel>
        </RadioButton>

        <RadioButton
            Margin="4"
            BorderBrush="{DynamicResource PrimaryBrush}"
            IsChecked="{Binding WarnFilter}"
            Style="{StaticResource MaterialDesignTabRadioButton}">
            <StackPanel Orientation="Horizontal">
                <Image
                    Width="16"
                    Height="16"
                    Source="/Assets/Images/Warn.png" />
                <TextBlock
                    Margin="5,0"
                    VerticalAlignment="Center"
                    Foreground="Black">
                    <Run Text="Warn" />
                    <Run Text="{Binding WarnCount}" />
                </TextBlock>
            </StackPanel>
        </RadioButton>
        <RadioButton
            Margin="4"
            BorderBrush="{DynamicResource PrimaryBrush}"
            IsChecked="{Binding ErrorFilter}"
            Style="{StaticResource MaterialDesignTabRadioButton}">
            <StackPanel Orientation="Horizontal">
                <Image
                    Width="16"
                    Height="16"
                    Source="/Assets/Images/Error.png" />
                <TextBlock
                    Margin="5,0"
                    VerticalAlignment="Center"
                    Foreground="Black">
                    <Run Text="Error" />
                    <Run Text="{Binding ErrorCount}" />
                </TextBlock>
            </StackPanel>
        </RadioButton>
        <RadioButton
            Margin="4"
            BorderBrush="{DynamicResource PrimaryBrush}"
            IsChecked="{Binding AlarmFilter}"
            Style="{StaticResource MaterialDesignTabRadioButton}">
            <StackPanel Orientation="Horizontal">
                <Image
                    Width="16"
                    Height="16"
                    Source="/Assets/Images/Alarm.png" />
                <TextBlock
                    Margin="5,0"
                    VerticalAlignment="Center"
                    Foreground="Black">
                    <Run Text="Alarm" />
                    <Run Text="{Binding AlarmCount}" />
                </TextBlock>
            </StackPanel>
        </RadioButton>
    </StackPanel>-->
    <!--<StackPanel
        Margin="2"
        HorizontalAlignment="Right"
        Orientation="Horizontal">
        <Button
            Width="26"
            Height="26"
            Margin="0,0,0,0"
            HorizontalAlignment="Center"
            Click="btnScrollIntoTop_Click"
            Style="{StaticResource MaterialDesignFloatingActionMiniLightButton}">
            <materialDesign:PackIcon Kind="TransferUp" />
        </Button>
        <Button
            Width="26"
            Height="26"
            Margin="2,0,0,0"
            Click="btnScrollIntoEnd_Click"
            Style="{StaticResource MaterialDesignFloatingActionMiniLightButton}">
            <Button.Content>
                <materialDesign:PackIcon Kind="TransferDown" />
            </Button.Content>
        </Button>
    </StackPanel>-->
    <DataGrid
        x:Name="dg"
        Grid.Row="1"
        AutoGenerateColumns="False"
        CanUserAddRows="False"
        EnableColumnVirtualization="True"
        EnableRowVirtualization="True"
        FontSize="10"
        GridLinesVisibility="All"
        HeadersVisibility="Column"
        IsReadOnly="True"
        ItemsSource="{Binding DisplayLogCollection}"
        RowHeaderWidth="20"
        SelectionUnit="FullRow"
        VirtualizingPanel.IsVirtualizing="True">
        <!--<DataGrid.Resources>
            <Style TargetType="DataGridRowHeader">
                <Setter Property="BorderThickness" Value="1"/>
            </Style>
        </DataGrid.Resources>-->
        <!--<DataGrid.RowStyle>
            <Style TargetType="DataGridCell">
                <Setter Property="Foreground" Value="AliceBlue"/>
            </Style>
        </DataGrid.RowStyle>-->
        <DataGrid.ContextMenu>
            <ContextMenu StaysOpen="True">
                <MenuItem Click="ClearAlarm" Header="ClearAlarm" />
            </ContextMenu>
        </DataGrid.ContextMenu>
        <DataGrid.Columns>
            <DataGridTemplateColumn
                Width="150"
                Header="Time"
                IsReadOnly="True">
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <TextBlock HorizontalAlignment="Left" Text="{Binding CreateTime, StringFormat=\{0:yyyy/MM/dd HH:mm:ss fff\}}" />
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
            <DataGridTemplateColumn
                Width="80"
                Header="_Type"
                IsReadOnly="True">
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <TextBlock HorizontalAlignment="Left" Text="{Binding LogType}" />
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
            <DataGridTemplateColumn
                Width="*"
                Header="_Content"
                IsReadOnly="True">
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <TextBlock
                            HorizontalAlignment="Left"
                            Foreground="{Binding LogColor}"
                            Text="{Binding Content}" />
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
        </DataGrid.Columns>
    </DataGrid>

</Grid>

and my .cs public partial class LogView : UserControl { #region Singleton

private static readonly LogView _instance = new LogView();

private LogView()
{
    InitializeComponent();
    this.DataContext = LogViewModel.Ins;
    DispatcherTimer dispatcherTimer = new DispatcherTimer();
    dispatcherTimer.Interval = TimeSpan.FromMilliseconds(100);
    dispatcherTimer.Tick += UpdateUI;
    dispatcherTimer.Start();
}

public static LogView Ins
{
    get { return _instance; }
}

#endregion Singleton

#region Prop

private const int MaxCountDisplayLogCollection = 1999;
private const int MaxCountAllLogCollection = 1999;
private const int MaxCountInfoCollection = 1999;
private const int MaxCountWarnCollection = 1999;
private const int MaxCountErrorCollection = 1999;
private const int MaxCountAlarmCollection = 1999;

#endregion Prop

#region Method

private void UpdateUI(object sender, EventArgs e)
{
    //return;
    while (Logger.LogInfos.Count > 0)
    {
        LogModel logModel = new LogModel();
        if (Logger.LogInfos.TryDequeue(out logModel))
        {
            if (LogViewModel.Ins.DisplayLogCollection.Count >= MaxCountDisplayLogCollection)
            {
                LogViewModel.Ins.DisplayLogCollection.RemoveAt(0);
            }
            if (LogViewModel.Ins.AllLogCollection.Count >= MaxCountAllLogCollection)
            {
                LogViewModel.Ins.AllLogCollection.RemoveAt(0);
            }
            if (LogViewModel.Ins.InfoCollection.Count >= MaxCountInfoCollection)
            {
                LogViewModel.Ins.InfoCollection.RemoveAt(0);
            }
            if (LogViewModel.Ins.WarnCollection.Count >= MaxCountWarnCollection)
            {
                LogViewModel.Ins.WarnCollection.RemoveAt(0);
            }
            if (LogViewModel.Ins.ErrorCollection.Count >= MaxCountErrorCollection)
            {
                LogViewModel.Ins.ErrorCollection.RemoveAt(0);
            }
            if (LogViewModel.Ins.AlarmCollection.Count >= MaxCountAlarmCollection)
            {
                LogViewModel.Ins.AlarmCollection.RemoveAt(0);
            }
            switch (logModel.LogType)
            {
                case MsgType.Success:
                case MsgType.Info:
                    logModel.LogColor = Brushes.Black;
                   
                    break;

                case MsgType.Warn:
                    logModel.LogColor = Brushes.Black;
                   
                    break;

                case MsgType.Error:
                    logModel.LogColor = Brushes.Red;
                    
                    break;

                case MsgType.Alarm:
                    logModel.LogColor = Brushes.Red;
                    break;
            }
            
            LogViewModel.Ins.DisplayLogCollection.Add(logModel);
            
            LogViewModel.Ins.AllLogCollection.Add(logModel);
            LogViewModel.Ins.InfoCount = LogViewModel.Ins.InfoCollection.Count;
            LogViewModel.Ins.WarnCount = LogViewModel.Ins.WarnCollection.Count;
            LogViewModel.Ins.ErrorCount = LogViewModel.Ins.ErrorCollection.Count;
            LogViewModel.Ins.AlarmCount = LogViewModel.Ins.AlarmCollection.Count;
        }
        if (Logger.LogInfos.Count == 0)
        {
            ScrollIntoEnd();
        }
    }
}

private void btnScrollIntoTop_Click(object sender, RoutedEventArgs e)
{
    //if (dg.Items.Count > 0)
    //{
    //    dg.ScrollIntoView(dg.Items[0]);
    //}
}

private void btnScrollIntoEnd_Click(object sender, RoutedEventArgs e)
{
    //if (dg.Items.Count > 0)
    //{
    //    dg.Items.Refresh();
    //    //dataGrid.ScrollIntoView(targetItem);

    //    dg.ScrollIntoView(dg.Items[dg.Items.Count - 1]);
    //}
}

private void ScrollIntoEnd()
{
    return;
    //if (dg.Items.Count > 0)
    //{
    //    Dispatcher.BeginInvoke(() =>
    //    {
    //        dg.ScrollIntoView(dg.Items[dg.Items.Count - 1]);
    //    });
        
    //}
}

private void ClearAlarm(object sender, RoutedEventArgs e)
{
    LogViewModel.Ins.AlarmCollection.Clear();
    LogViewModel.Ins.AlarmCount = LogViewModel.Ins.AlarmCollection.Count;
   
}

#endregion Method

}

Version

5.1.1

[corvinsz]

@Sade686 is it possible you provide either a repo, or a different, more to the point example? With the code you provided above I have to change alot of things to even get it compiled, and I feel like it contains alot of other code which is not part of the problem you are trying to report. This makes it hard to reproduce and thus pinpoint the issue.