ValueChanged Event

In This Topic

This event is raised whenever the property's value changed. It can be used to update the enabled state of other dependent properties.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Event ValueChanged As EventHandler(Of EventArgs)

public event EventHandler<EventArgs> ValueChanged

public:
event EventHandler<EventArgs^>^ ValueChanged

Example

void MapProperty_ValueChanged(object sender, EventArgs e)
{
    switch (obj.CoordinateEvaluationType)
    {
        case CoordinateEvaluation.Coordinates:
            {
                obj.DesignerProperties["City"].Enabled = false;
                obj.DesignerProperties["Latitude"].Enabled = true;
                obj.DesignerProperties["Longitude"].Enabled = true;
            }
            break;
        case CoordinateEvaluation.GeoCoder:
            {
                obj.DesignerProperties["City"].Enabled = true;
                obj.DesignerProperties["Latitude"].Enabled = false;
                obj.DesignerProperties["Longitude"].Enabled = false;
            }
            break;
        default:
            break;
    } 
}

VB.NET

Private Sub MapProperty_ValueChanged(sender As Object, e As EventArgs)
	Select Case obj.CoordinateEvaluationType
		Case CoordinateEvaluation.Coordinates
			If True Then
				obj.DesignerProperties("City").Enabled = False
				obj.DesignerProperties("Latitude").Enabled = True
				obj.DesignerProperties("Longitude").Enabled = True
			End If
			Exit Select
		Case CoordinateEvaluation.GeoCoder
			If True Then
				obj.DesignerProperties("City").Enabled = True
				obj.DesignerProperties("Latitude").Enabled = False
				obj.DesignerProperties("Longitude").Enabled = False
			End If
			Exit Select
		Case Else
			Exit Select
	End Select
End Sub

Requirements

Platforms: Windows 10 (Version 21H2 - 23H2), Windows 11 (21H2 - 22H2), Windows Server 2016 - 2022
.NET: .NET Framework 4.8, .NET 6, .NET 7, .NET 8

Reference

DesignerProperty Class
DesignerProperty Members

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