AppearanceAttribute.BackColor Property

Specifies the background color of UI elements affected by the conditional appearance rule generated from this attribute instance.

Namespace: DevExpress.ExpressApp.ConditionalAppearance

Assembly: DevExpress.Persistent.Base.v24.1.dll

NuGet Package: DevExpress.Persistent.Base

Declaration

C#

public string BackColor { get; set; }

VB.NET

Public Property BackColor As String

Property Value

Type	Description
String	A string specifying the background color of UI elements affected by the conditional appearance rule. A value should be recognizable by the System.Drawing.ColorConverter class.

Remarks

The following UI elements can change their background color:

• Data cells in a GridListEditor, ASPxGridListEditor and DxGridListEditor
• Nodes in a TreeListEditor and ASPxTreeListEditor
• Property Editors that are inherited from the DXPropertyEditor, WebPropertyEditor and BlazorPropertyEditorBase types
• StaticText

Note

It is not recommended to apply the same background color for all business class properties. This setting changes the background color of selected rows in the GridControl, so the selection will be invisible when rows with the modified background color are selected. Additionally, note that the font color depends on the current skin (see IModelApplicationOptionsSkin.Skin). So, ensure that the specified background color does not make the text unreadable in certain skins.

According to the rule demonstrated in the example below, the Product objects whose Price is more than 50 will be displayed in Red background using Maroon font color in List Views.

C# (EF Core)

using DevExpress.ExpressApp.ConditionalAppearance;
//...
[Appearance("RedPriceObject", AppearanceItemType = "ViewItem", TargetItems = "*",
    Criteria = "Price>50", Context = "ListView", BackColor = "Red",
        FontColor = "Maroon", Priority = 2)]
public class Product : BaseObject {
    public virtual string Name { get; set; }
    public virtual decimal Price { get; set; }
    public virtual ProductStatus Status { get; set; }
    public virtual Category Category { get; set; }
}

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

C# (XPO)

using DevExpress.ExpressApp.ConditionalAppearance;
//...
[Appearance("RedPriceObject", AppearanceItemType = "ViewItem", TargetItems = "*",
    Criteria = "Price>50", Context = "ListView", BackColor = "Red",
        FontColor = "Maroon", Priority = 2)]
public class Product : BaseObject {
    public Product(Session session) : base(session) { }
    public string Name {
        //...
    }
    public decimal Price {
        //...
    }
    public ProductStatus Status {
        //...
    }
    public Category Category {
        //...
    }
}

VB.NET (XPO)

Imports DevExpress.ExpressApp.ConditionalAppearance
'...
<Appearance("RedPriceObject", AppearanceItemType := "ViewItem", TargetItems := "*", _
Criteria := "Price>50", Context := "ListView", BackColor := "Red", _
FontColor := "Maroon", Priority := 2)> _
Public Class Product
        Inherits BaseObject
    Public Sub New(ByVal session As Session)
        MyBase.New(session)
    End Sub
    Public ReadOnly Property Name() As String
        '...
    End Property
    Public ReadOnly Property Price() As Decimal
        '...
    End Property
    Public ReadOnly Property Status() As ProductStatus
        '...
    End Property
    Public ReadOnly Property Category() As Category
        '...
    End Property
End Class

You will find many examples demonstrated in the FeatureCenter demo installed with XAF. This demo is located in the %PUBLIC%\Documents\DevExpress Demos 24.1\Components\XAF\FeatureCenter.NETFramework.XPO folder, by default.