How do we show a checkbox column in the DataGrid for a Boolean property ?

To show a checkbox column for a Boolean property in a DataGrid, you typically bind the column to a bool property. Below are the most common cases used in .NET / WPF / WinForms, which are often asked in interviews.

✅ WPF DataGrid (Most Common Interview Answer)

Use DataGridCheckBoxColumn.

🔹 Example Model

public class User
{
    public string Name { get; set; }
    public bool IsActive { get; set; }
}

🔹 XAML DataGrid

<DataGrid ItemsSource="{Binding Users}" AutoGenerateColumns="False">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Name" Binding="{Binding Name}" />
        <DataGridCheckBoxColumn Header="Active"
                                Binding="{Binding IsActive}" />
    </DataGrid.Columns>
</DataGrid>

✔ Automatically displays a checkbox
✔ Two-way binding by default
✔ Works for bool property

✅ Editable Checkbox (Template Column – Advanced)

Use this when you need custom behavior.

<DataGridTemplateColumn Header="Active">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <CheckBox IsChecked="{Binding IsActive}" />
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

✅ WinForms DataGridView

Use DataGridViewCheckBoxColumn.

DataGridViewCheckBoxColumn chk = new DataGridViewCheckBoxColumn();
chk.HeaderText = "Active";
chk.DataPropertyName = "IsActive";

dataGridView1.Columns.Add(chk);

✅ ASP.NET MVC Grid (Interview Bonus)

@Html.CheckBoxFor(model => model.IsActive)

Or inside a Grid:

@Html.CheckBox("IsActive", item.IsActive)

🔑 Interview One-Line Answer

To show a checkbox column in a DataGrid for a Boolean property, use DataGridCheckBoxColumn and bind it to the Boolean field.