IExternalCommandAvailability Interface

public interface IExternalCommandAvailability

Public Interface IExternalCommandAvailability

public interface class IExternalCommandAvailability

type IExternalCommandAvailability = interface end

public class SampleAccessibilityCheck : IExternalCommandAvailability
{
    public bool IsCommandAvailable(Autodesk.Revit.UI.UIApplication applicationData, 
        CategorySet selectedCategories)
    {
        // Allow button click if there is no active selection
        if (selectedCategories.IsEmpty)
            return true;
        // Allow button click if there is at least one wall selected
        foreach (Category c in selectedCategories)
        {
            if (c.BuiltInCategory == BuiltInCategory.OST_Walls)
                return true;
        }
        return false;
    }
}

Public Class SampleAccessibilityCheck
    Implements IExternalCommandAvailability
    Public Function IsCommandAvailable(applicationData As Autodesk.Revit.UI.UIApplication, selectedCategories As CategorySet) As Boolean Implements IExternalCommandAvailability.IsCommandAvailable
        ' Allow button click if there is no active selection
        If selectedCategories.IsEmpty Then
            Return True
        End If
        ' Allow button click if there is at least one wall selected
        For Each c As Category In selectedCategories
            If c.BuiltInCategory = BuiltInCategory.OST_Walls Then
                Return True
            End If
        Next
        Return False
    End Function
End Class

No code example is currently available or this language may not be supported.

No code example is currently available or this language may not be supported.