WPF DataGridCheckBoxColumn Control question

Question

Hello, I need modify DataGridCheckBoxColumn Control inside checkbox size, but i don't find a way to modify it, Who can tell me ? Thanks

Answer 1

CheckBoxes can be changed by setting the ElementStyle property.

<DataGrid DataContext="ABC" ItemsSource="{Binding}" >
    <DataGrid.Columns >

        <DataGridCheckBoxColumn  Header="CheckBox">
            <DataGridCheckBoxColumn.ElementStyle>
                <Style TargetType="{x:Type CheckBox}">
                    <Setter Property="LayoutTransform">
                        <Setter.Value>
                            <ScaleTransform ScaleX="2" ScaleY="2" />
                        </Setter.Value>
                    </Setter>
                </Style>
            </DataGridCheckBoxColumn.ElementStyle>
        </DataGridCheckBoxColumn>

    </DataGrid.Columns>
</DataGrid>

Answer 2

Hi, try this MVVM demo to add column by code. Include System.Windows.Interactivity from Nuget.

<Window x:Class="WpfApp1.Window49"  
        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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  
        xmlns:local="clr-namespace:WpfApp49"  
        xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"  
        mc:Ignorable="d"  
        Title="Window49" Height="450" Width="800">  
  <Window.DataContext>  
    <local:ViewModel/>  
  </Window.DataContext>  
    <Grid>  
    <DataGrid ItemsSource="{Binding View}" AutoGenerateColumns="False">  
      <i:Interaction.Behaviors>  
        <local:DataGridBehavior/>  
      </i:Interaction.Behaviors>  
    </DataGrid>  
    </Grid>  
</Window>  

--------------------------------------------------------

using System.Collections.Generic;  
using System.Windows;  
using System.Windows.Controls;  
using System.Windows.Data;  
using System.Windows.Interactivity;  
using System.Windows.Media;  
  
namespace WpfApp49  
{  
  public class ViewModel  
  {  
    public List<Data> View { get => GetData(); }  
    private List<Data> GetData()  
    {  
      var l = new List<Data>();  
      for (int i = 0; i < 10; i++) l.Add(new Data() { ID = i });  
      return l;  
    }  
  
    public class Data  
    {  
      public int ID { get; set; }  
      public bool Switch { get; set; } = true;  
    }  
  }  
  public class DataGridBehavior : Behavior<DataGrid>  
  {  
    protected override void OnAttached()  
    {  
      AssociatedObject.Columns.Add(new DataGridTextColumn() { Header = "ID", Binding = new Binding("ID") });  
      var dgcbc = new DataGridCheckBoxColumn() { Header = "Switch", Binding = new Binding("Switch") };  
      AssociatedObject.Columns.Add(dgcbc);  
      var st = new Style() { TargetType = typeof(DataGridCell) };  
      st.Setters.Add(new Setter() { Property = DataGridCell.LayoutTransformProperty, Value = new ScaleTransform() { ScaleX = 2, ScaleY = 2 } });  
      dgcbc.CellStyle = st;  
    }  
  }  
}