CardViewSettings.CustomUnboundColumnData Property

Enables data to be supplied to unbound columns.

Namespace: DevExpress.Web.Mvc

Assembly: DevExpress.Web.Mvc5.v20.2.dll


public ASPxCardViewColumnDataEventHandler CustomUnboundColumnData { get; set; }
Public Property CustomUnboundColumnData As ASPxCardViewColumnDataEventHandler

Property Value

Type Description

A ASPxCardViewColumnDataEventHandler delegate method allowing you to implement custom processing.


To provide unbound columns with data using a delegate method, assign this delegate method to the CustomUnboundColumnData property. The delegate method assigned to this property will be called for unbound columns only.

The code sample below demonstrates how to add an unbound column that retrieves data using a delegate method.

Partial View code:

@Html.DevExpress().CardView(settings => {
    settings.Name = "CardView";
    settings.CallbackRouteValues = new { Controller = "Home", Action = "CardViewPartial" };
    // ...
    // Add columns bound to model fields.
    settings.Columns.Add(column => {
        // "FieldName" contains a unique value that does not refer to any field in the CardView's data model. 
        column.FieldName = "FullName";
        // The column contains string values.
        column.UnboundType = DevExpress.Data.UnboundColumnType.String;
    // A delegate method that allows you to generate data for an unbound column.
    settings.CustomUnboundColumnData = (s, e) => {
        if (e.Column.FieldName == "FullName") {
            string firstName = (e.GetListSourceFieldValue("FirstName")).ToString();
            string lastName = (e.GetListSourceFieldValue("LastName")).ToString();
            e.Value = firstName + " " + lastName;

When the CardView extension is bound to a data source in Database Server Mode, you can only enable sorting, filtering and summary calculation for unbound columns that are populated with unbound expressions.

See Also