Data Columns

• Feb 02, 2023
• 4 minutes to read

Data columns are used to display and edit data. CardView supports both bound and unbound data columns.

• Bound data columns represent fields in CardView ‘s data source. Their CardViewColumn.FieldName properties refer to valid fields in a data source.
• Unbound columns are not bound to any field in a data source. These columns must be populated manually. For information, see Unbound Columns.

There are fifteen types of server data columns.

You can define the column type using the MVCxCardViewColumn.ColumnType property, which receives one of the MVCxCardViewColumnType enumeration values. The table below lists the CardView column types, and the default editors used to edit and display values in these column types.

On the client, data columns are represented by ASPxClientCardViewColumn objects.

Behavior

Since different types of data columns present different types of data, they provide their own editors. For example, boolean values are edited using a check box editor, while DateTime values are edited using a DateTime editor. To access and customize the column editor’s settings, use the CardViewColumn.PropertiesEdit property.

Data columns provide a set of boolean properties that enable you to specify which elements of a column’s functionality (sorting, filtering, etc.) are available to end-users. These options can be accessed using the CardViewColumn.Settings property.

To make a column read-only, set its CardViewColumn.ReadOnly property to true.

The code sample below demonstrates how to add a read-only data column, change columns settings, and change the built-in data editor settings.

• C#

@Html.DevExpress().CardView(settings => {
    settings.Name = "CardView";
    settings.CallbackRouteValues = new { Controller = "Home", Action = "CardViewPartial" };
    // ... 
    // Add a read-only data column. 
    settings.Columns.Add("FullName").ReadOnly = true;
    // Add a data column bound to the "Quantity" field. 
    settings.Columns.Add(c =>
    {
        // Define column settings. 
        // Define the name of the field to which the column is bound. 
        c.FieldName = "Quantity";
        // End-users will be able to edit column values using the SpinEdit extension. 
        c.ColumnType = MVCxCardViewColumnType.SpinEdit;
        // Define SpinEdit settings. 
        var spinSettings = (SpinEditProperties)c.PropertiesEdit;
        spinSettings.LargeIncrement = 10;
        spinSettings.SpinButtons.ShowLargeIncrementButtons = true;
    });
    // ... 
}).Bind(Model).GetHtml();

Visibility

The column’s visibility is specified by its WebColumnBase.Visible property. Its position among other visible columns is specified by its WebColumnBase.VisibleIndex property.