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.NET Framework 4.5.2+

AppearanceAttribute(String) Constructor

Creates a new instance of the AppearanceAttribute class.

Namespace: DevExpress.ExpressApp.ConditionalAppearance

Assembly: DevExpress.Persistent.Base.v22.2.dll


public AppearanceAttribute(
    string id


Name Type Description
id String

A string that is the unique identifier for the appearance rule created using the current attribute instance.


This constructor sets the following attribute properties:

The remaining properties can be specified using the constructor’s named parameters.

To learn how to define a rule using the Appearance attribute, refer to the Declare Conditional Appearance Rules in Code topic.


According to the rule demonstrated in the example below, the Category property in List Views will be displayed in Blue font color when its value is “Seafood”.

using DevExpress.ExpressApp.ConditionalAppearance;
[Appearance("CategoryColoredInListView", AppearanceItemType = "ViewItem", TargetItems = "Category",
 Criteria = "Category = 'Seafood'", Context = "ListView", FontColor = "Blue", Priority = 1)]
public class Product : BaseObject {
    public virtual Category Category { get; set; }

public class Category : BaseObject {
    public virtual string Name { get; set; }

// Make sure that you use options.UseChangeTrackingProxies() in your DbContext settings.

The following code snippets (auto-collected from DevExpress Examples) contain references to the AppearanceAttribute(String) constructor.


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See Also