windowsforms-devexpress-dot-xtraeditors-dot-repository-dot-repositoryitemcheckedit-3e1139bd.md
Fires after the CheckEdit.Checked property has been changed.
Namespace : DevExpress.XtraEditors.Repository
Assembly : DevExpress.XtraEditors.v25.2.dll
NuGet Package : DevExpress.Win.Navigation
[DXCategory("Events")]
public event EventHandler CheckedChanged
<DXCategory("Events")>
Public Event CheckedChanged As EventHandler
The CheckedChanged event's data class is EventArgs.
This example demonstrates how to programmatically create two check editors, initialize their properties and assign the same handler for their CheckEdit.CheckedChanged events. The created check editors will be used to control the visibility and availability of a standard button control. The example implies that the button is already placed onto a form.
Changing the check state of the first check editor affects both the button’s visibility and the second check editor’s availability. The second check editor specifies the availability of the button for end-users.
The image below displays the example application.
using DevExpress.XtraEditors;
using DevExpress.Utils;
private void CreateCheckEditors() {
// creating and initializing the first check editor
CheckEdit chEdit1 = new CheckEdit();
chEdit1.Properties.Caption = "Hide Button";
chEdit1.Name = "chEdit1";
chEdit1.Location = new System.Drawing.Point(6, 35);
chEdit1.Width = 100;
// setting the editor's check state depending upon the button's visibility
if (!(button1.Visible)) chEdit1.Checked = true;
// assigning a handler for the CheckChanged event of the first check editor
chEdit1.CheckedChanged += new EventHandler(CheckedChanged);
this.Controls.Add((Control)chEdit1);
// creating and initializing the second check editor
CheckEdit chEdit2 = new CheckEdit();
chEdit2.Properties.Caption = "Disable Button";
chEdit2.Name = "chEdit2";
chEdit2.Location = new System.Drawing.Point(6, 55);
chEdit2.Width = 100;
// setting the editor's check state depending upon the button's availability
if (!(button1.Enabled)) chEdit2.Checked = true;
if (!(button1.Visible)) chEdit2.Enabled = false;
// assigning a handler for the CheckChanged event of the second check editor
chEdit2.CheckedChanged += new EventHandler(CheckedChanged);
this.Controls.Add((Control)chEdit2);
}
private void CheckedChanged(object sender, System.EventArgs e) {
CheckEdit edit = sender as CheckEdit;
switch (edit.Checked) {
case true:
if (edit == GetCheckEdit("chEdit1")){
// hiding the button
button1.Visible = false;
// disabling the second check editor
GetCheckEdit("chEdit2").Enabled = false;
}
else if (edit == GetCheckEdit("chEdit2")){
// enabling the button
button1.Enabled = false;
}
break;
case false:
if (edit == GetCheckEdit("chEdit1")){
// showing the button
button1.Visible = true;
// enabling the second check editor
GetCheckEdit("chEdit2").Enabled = true;
}
else if (edit == GetCheckEdit("chEdit2")){
// disabling the button
button1.Enabled = true;
}
break;
}
}
private CheckEdit GetCheckEdit(string editName){
foreach(Control control in this.Controls){
if ((control is CheckEdit) && (control.Name == editName))
return control as CheckEdit;
}
return null;
}
Imports DevExpress.XtraEditors
Imports DevExpress.Utils
Private Sub CreateCheckEditors()
' creating and initializing the first check editor
Dim ChEdit1 As New CheckEdit()
ChEdit1.Properties.Caption = "Hide Button"
ChEdit1.Name = "ChEdit1"
ChEdit1.Location = New System.Drawing.Point(6, 35)
ChEdit1.Width = 100
' setting the editor's check state depending upon the button's visibility
If Not Button1.Visible Then ChEdit1.Checked = True
' assigning a handler for the CheckChanged event of the first check editor
AddHandler ChEdit1.CheckedChanged, AddressOf CheckedChanged
Me.Controls.Add(CType(ChEdit1, Control))
' creating and initializing the second check editor
Dim ChEdit2 As New CheckEdit()
ChEdit2.Properties.Caption = "Disable Button"
ChEdit2.Name = "ChEdit2"
ChEdit2.Location = New System.Drawing.Point(6, 55)
ChEdit2.Width = 100
' setting the editor's check state depending upon the button's availability
If Not Button1.Enabled Then ChEdit2.Checked = True
If Not Button1.Visible Then ChEdit2.Enabled = False
' assigning a handler for the CheckChanged event of the second check editor
AddHandler ChEdit2.CheckedChanged, AddressOf CheckedChanged
Me.Controls.Add(CType(ChEdit2, Control))
End Sub
Private Sub CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim Edit As CheckEdit = CType(sender, CheckEdit)
Select Case Edit.Checked
Case True
If Edit Is GetCheckEdit("ChEdit1") Then
' hiding the button
Button1.Visible = False
' disabling the second check editor
GetCheckEdit("ChEdit2").Enabled = False
ElseIf Edit Is GetCheckEdit("ChEdit2") Then
' enabling the button
Button1.Enabled = False
End If
Case False
If Edit Is GetCheckEdit("ChEdit1") Then
' showing the button
Button1.Visible = True
' enabling the second check editor
GetCheckEdit("ChEdit2").Enabled = True
ElseIf Edit Is GetCheckEdit("chEdit2") Then
' disabling the button
Button1.Enabled = True
End If
End Select
End Sub
Private Function GetCheckEdit(ByVal editName As String) As CheckEdit
Dim Control As Control
For Each Control In Me.Controls
If TypeOf Control Is CheckEdit And Control.Name = editName Then
Return CType(Control, CheckEdit)
EndIf
Next
Return Nothing
End Function
See Also