AppearanceAttribute(String, String) Constructor

Creates a new instance of the AppearanceAttribute using the specified parameters.

Namespace: DevExpress.ExpressApp.ConditionalAppearance

Assembly: DevExpress.Persistent.Base.v18.2.dll

Declaration

C#

public AppearanceAttribute(
    string id,
    string criteria
)

VB.NET

Public Sub New(
    id As String,
    criteria As String
)

Parameters

Name	Type	Description
id	String	A string that is the unique identifier for the appearance rule created using the current attribute instance.
criteria	String	A string that is the criterion for activation of the rule created using the current attribute instance.

Remarks

This constructor sets the following attribute properties:

• AppearanceAttribute.Id is set to the value passed as the id parameter;
• AppearanceAttribute.Criteria is set to the value passed as the criteria parameter;
• AppearanceAttribute.Context is set to Any (a default value);
• AppearanceAttribute.AppearanceItemType is set to ViewItem (a default value).

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.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the AppearanceAttribute(String, String) constructor.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

XAF_initiate-a-delayed-long-running-operation-and-process-it-on-the-server-without-blocking-e4228/CS/LongRunningOperations.Module/BusinessObjects/Object1.cs#L9

[DefaultClassOptions]
[Appearance("IsInProcessing", "[IsInProcessing]='True'", Enabled = false, TargetItems="*")]
public class Object1 : BaseObject {

VB.NET

XAF_initiate-a-delayed-long-running-operation-and-process-it-on-the-server-without-blocking-e4228/VB/LongRunningOperations.Module/BusinessObjects/Object1.vb#L9

<DefaultClassOptions>
<Appearance("IsInProcessing", "[IsInProcessing]='True'", Enabled := False, TargetItems:="*")>
Public Class Object1