Question

I am facing an issue. In my view I have a DataGrid whose Horizontal Scroll Bar’s Visibility is set to Auto. Problem I am facing is that the scroll bar is appearing all the time even if there is enough space for DataGrid to expand and completely display itself. I have tried almost everything but couldn’t figure out whats is wrong.

I have uploaded a sample application to demonstrate the problem here. Hoping anyone will point out mistake I am making.

Answer 1

I did following changes/workarounds to solve the issue. It might not be the perfect solution but works for me.

I added two more columns in the Grid, one in the start and one at the end.

<Grid.ColumnDefinitions>
    <ColumnDefinition Width="{Binding ElementName=m_DataGrid, Path=RowHeaderWidth}" />
    <ColumnDefinition Width="{Binding ElementName=col1, Path=ActualWidth}" />
    <ColumnDefinition Width="{Binding ElementName=col2, Path=ActualWidth}" />
    <ColumnDefinition Width="{Binding ElementName=col3, Path=ActualWidth}" />
    <ColumnDefinition Width="{Binding ElementName=col4, Path=ActualWidth}" />
    <ColumnDefinition x:Name="specialCol" />
</Grid.ColumnDefinitions>

Then I increased the ColumnSpan of DataGrid

...Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="6" ....

Then I added this line in Constrcutor of Window

specialCol.Width = new GridLength (2);

and changed UpdateGrid method to this

 void UpdateGrid()
 {
     ScrollViewer scrollview = FindVisualChild<ScrollViewer>(m_DataGrid);
     Visibility verticalVisibility = scrollview.ComputedVerticalScrollBarVisibility;

     if (verticalVisibility == System.Windows.Visibility.Visible)
     {
       specialCol.Width = new GridLength(20);
       m_Border.Width = m_DataGrid.ActualWidth - m_DataGrid.RowHeaderWidth - 17;
     }
     else
     {
        specialCol.Width = new GridLength(2);
        m_Border.Width = m_DataGrid.ActualWidth - m_DataGrid.RowHeaderWidth;
     }
}

I don’t see any HorizontalScrollBar now until it is required