ValueChanged Event

In This Topic

Syntax
Example
Requirements
See Also

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

Syntax

public event EventHandler<EventArgs> ValueChanged

public:
event EventHandler<EventArgs^>^ ValueChanged

'Declaration
 
Public Event ValueChanged As EventHandler(Of EventArgs)

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 8, .NET 9

Reference

DesignerProperty Class
DesignerProperty Members

Send Feedback