Expression Column

Updated on Sep 23, 2026

GridViewExpressionColumn derives from the GridViewColumn class and allows you to display various calculations in RadGridView itself. The GridViewExpressionColumn can be sorted and grouped like any other type of column.

For the purposes of this example, we will use the objects and viewmodel defined in examples 1 and 2.

Example 1: The Product class

C#

public class Product
{
    public int ProductID { get; set; }
    public string ProductName { get; set; }
    public int UnitPrice { get; set; }
    public int UnitsInStock { get; set; }
}

VB.NET

Public Class Product
	Public Property ProductID() As Integer
	Public Property ProductName() As String
	Public Property UnitPrice() As Integer
	Public Property UnitsInStock() As Integer
End Class

Example 2: The viewmodel

C#

public class MainViewModel : ViewModelBase
{
    private ObservableCollection<Product> products;

    public ObservableCollection<Product> Products
    {
        get
        {
            if (this.products == null)
            {
                this.products = new ObservableCollection<Product>();
                for (int i = 1; i <= 5; i++)
                {
                    this.products.Add(new Product() { ProductID = i, ProductName = "Product " + i, UnitPrice = i * 10, UnitsInStock = i });
                }
            }

            return this.products;
        }
    }
}

VB.NET

Public Class MainViewModel
	Inherits ViewModelBase

	Private _products_ As ObservableCollection(Of Product)

	Public ReadOnly Property Products() As ObservableCollection(Of Product)
		Get
			If Me._products_ Is Nothing Then
				Me._products_ = New ObservableCollection(Of Product)()
				For i As Integer = 1 To 5
					Me._products_.Add(New Product() With {
						.ProductID = i,
						.ProductName = "Product " & i,
						.UnitPrice = i * 10,
						.UnitsInStock = i
					})
				Next i
			End If

			Return Me._products_
		End Get
	End Property
End Class

With this data setup, we can bind the GridViewExpressionColumn as shown in Example 3.

Example 3: Define GridViewExpressionColumn in XAML

XAML

<telerik:RadGridView x:Name="GridView" ItemsSource="{Binding Products}" AutoGenerateColumns="False" ColumnWidth="*">
    <telerik:RadGridView.Columns>
        <telerik:GridViewDataColumn Header="Product ID" DataMemberBinding="{Binding ProductID}" />
        <telerik:GridViewDataColumn Header="Product name" DataMemberBinding="{Binding ProductName}" />
        <telerik:GridViewDataColumn Header="Unit price" DataMemberBinding="{Binding UnitPrice}" DataFormatString="{}{0:C}" />
        <telerik:GridViewDataColumn Header="Units in stock" DataMemberBinding="{Binding UnitsInStock}" />
        <telerik:GridViewExpressionColumn Header="Total value in stock" Expression="UnitPrice * UnitsInStock" DataFormatString="{}{0:C}" />
    </telerik:RadGridView.Columns>
</telerik:RadGridView>

The most important property to be set is the Expression property. It can also be set in code-behind, for example, if the expression is too complex to be translated in XAML.

Example 4: Set Expression for GridViewExpressionColumn in code.

C#

Expression<Func<Product, double>> expression = prod => prod.UnitPrice * prod.UnitsInStock;
GridViewExpressionColumn column = this.GridView.Columns.OfType<GridViewExpressionColumn>().First();
column.Expression = expression;

VB.NET

Dim expression As Expression(Of Func(Of Product, Double)) = Function(prod) prod.UnitPrice * prod.UnitsInStock
Dim column As GridViewExpressionColumn = Me.GridView.Columns.OfType(Of GridViewExpressionColumn)().First()
column.Expression = expression

The values displayed in GridViewExpressionColumn will be updated automatically when a concerned property on the data item changes.

More information about expressions could be found here.