CurrentUserDisplayImageAttribute Class

Applied to business classes that implement a Security System user. Specifies the name of a property that stores the current user photo or avatar icon. Has effect in the ASP.NET Core Blazor UI and New Web UI only.

Namespace: DevExpress.Persistent.Base

Assembly: DevExpress.ExpressApp.v23.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface)]
public class CurrentUserDisplayImageAttribute :
    Attribute

VB.NET

<AttributeUsage(AttributeTargets.Class Or AttributeTargets.Interface)>
Public Class CurrentUserDisplayImageAttribute
    Inherits Attribute

Remarks

You can pass the name of a property that stores a user image to the CurrentUserDisplayImage attribute to display this image in the application toolbar.

Follow the steps below to extend a user class with a property that stores a user image:

1. In a user business class, declare a property of the MediaDataObject (XPO/EF Core), Image, or byte[] type.

2. Apply CurrentUserDisplayImageAttribute to the user class and pass the new property name as its parameter.

   XPO

   C#

   using DevExpress.Persistent.Base;
   using DevExpress.Persistent.BaseImpl;
   // ...
   [CurrentUserDisplayImage(nameof(Photo))]
   public class MyAppUser : PermissionPolicyUser, IObjectSpaceLink, ISecurityUserWithLoginInfo {
       // ...
       private MediaDataObject photo;
       public MediaDataObject Photo {
           get { return photo; }
           set { SetPropertyValue(nameof(Photo), ref photo, value); }
       }
   }
   

   VB.NET

   Imports DevExpress.Persistent.Base
   Imports DevExpress.Persistent.BaseImpl
   ' ...
   <CurrentUserDisplayImage(nameof(Photo))>
   Public Class MyAppUser
       Inherits PermissionPolicyUser
       Implements IObjectSpaceLink, ISecurityUserWithLoginInfo
       ' ...
       Private _photo As MediaDataObject
       Public Property Photo() As MediaDataObject
           Get
               Return _photo
           End Get
           Set(ByVal value As MediaDataObject)
               SetPropertyValue(NameOf(Photo), _photo, value)
           End Set
       End Property
   End Class
   

   EF Core

   C#

   using DevExpress.Persistent.Base;
   using DevExpress.Persistent.BaseImpl;
   // ...
   [CurrentUserDisplayImage(nameof(Photo))]
   public class MyAppUser : PermissionPolicyUser, IObjectSpaceLink, ISecurityUserWithLoginInfo {
       // ...
       private MediaDataObject photo;
       public virtual MediaDataObject Photo {
           get { return photo; }
           set { SetReferencePropertyValue(ref photo, value); }
       }
   }
   

3. In ASP.NET Web Forms applications, invoke the Model Editor, navigate to the Application node, and set the CurrentUserDisplayMode property to CaptionAndImage or Image.

   

The result is demonstrated in the images below:

ASP.NET Core Blazor

ASP.NET Web Forms

Inheritance

Object

Attribute

CurrentUserDisplayImageAttribute