How to display disabled buttons for particular cells within a ButtonEdit column

Description:
I want to display disabled buttons in a ButtonEdit column for a particular cell depending upon some condition. How can I do this?

Answer:
There are three ways to implement this task:

1. Create two ButtonEdit repository items. One with the enabled button and another with the disabled button. Then handle the GridView.CustomRowCellEdit event and pass the necessary repository item to the e.RepositoryItem parameter according to a specific condition. Please see the Assigning Editors to Individual Cells help topic for additional information.
   2. Create a custom button editor. (Custom editor creation is described in the Custom Editors article.) Then, implement a custom ViewInfo class and override the OnBeginPaint()  method as shown below.

C#
public class CustomButtonEditViewInfo : ButtonEditViewInfo {  
    protected override void OnBeginPaint() {  
        base.OnBeginPaint();  
        ApplyState();  
    }  
    public void ApplyState() {  
        ButtonStateEventArgs e = new ButtonStateEventArgs(Tag);  
        (this.Item as RepositoryItemCustomButtonEdit).RaiseButtonStateEvent(e);  
        if (!e.IsEnable && this.RightButtons.Count > 0) {  
            this.RightButtons[0].State = DevExpress.Utils.Drawing.ObjectState.Disabled;  
        }  
    }  
    public CustomButtonEditViewInfo(RepositoryItem item)  
        : base(item) {  
    }  
}  

Visual Basic
Public Class CustomButtonEditViewInfo  
        Inherits ButtonEditViewInfo  
        Protected Overrides Sub OnBeginPaint()  
            MyBase.OnBeginPaint()  
            ApplyState()  
        End Sub  
        Public Sub ApplyState()  
            Dim e As New ButtonStateEventArgs(Tag)  
            TryCast(Me.Item, RepositoryItemCustomButtonEdit).RaiseButtonStateEvent(e)  
            If (Not e.IsEnable) AndAlso Me.RightButtons.Count > 0 Then  
                Me.RightButtons(0).State = DevExpress.Utils.Drawing.ObjectState.Disabled  
            End If  
        End Sub  
        Public Sub New(ByVal item As RepositoryItem)  
            MyBase.New(item)  
        End Sub  
    End Class  

Additionally, implement the GetButtonState event in a custom RepositoryItem class. Handle it to pass any custom condition to the editor.
Please see the How to display disabled buttons for particular cells within a ButtonEdit column example (or attached example) to get a detailed solution.
See Also:
How to Conditionally Prevent Editing for Individual Grid Cells
How to customize the Look-And-Feel of my grid cells
How to make my grid columns read-only
How to change the editor's button text depending upon the grid row