Spread Windows Forms 10.0 Product Documentation
CheckStateChanged Event
Example 


FarPoint.Win Assembly > FarPoint.Win Namespace > FpCheckBox Class : CheckStateChanged Event
Occurs when the check state of the control is changing.
Syntax
'Declaration
 
Public Event CheckStateChanged As EventHandler
'Usage
 
Dim instance As FpCheckBox
Dim handler As EventHandler
 
AddHandler instance.CheckStateChanged, handler
public event EventHandler CheckStateChanged
Remarks

Change the check box state by setting either the Checked or the CheckState properties, or by clicking the check box.

The check states are the settings for the CheckState enumeration. For more information, see the CheckState enumeration in the Microsoft .NET Framework Reference.

Example
private void Form1_Load(object sender, System.EventArgs e)
{
     control.CheckState = CheckState.Unchecked;
     control.PictureAlignH=FarPoint.Win.HorizontalAlignment.Center;
     control.PictureAlignV = FarPoint.Win.VerticalAlignment.Center;
     control.BackgroundImage = new FarPoint.Win.Picture(Image.FromFile("d:\\mail16a.ico", true), FarPoint.Win.RenderStyle.Normal);
}
private void control_CheckChanged(object sender, System.EventArgs e)
    {
    if (control.CheckState == CheckState.Checked)
    { 
        control.BackgroundImage = new FarPoint.Win.Picture(Image.FromFile("d:\\mail16a.ico", true), FarPoint.Win.RenderStyle.Normal);
        control.PictureAlignH = FarPoint.Win.HorizontalAlignment.Center;
        control.PictureAlignV = FarPoint.Win.VerticalAlignment.Center;
        control.TextTrue = "Mail's been checked";
    }
   else if (control.CheckState == CheckState.Unchecked) 
   {
        control.BackgroundImage = new FarPoint.Win.Picture(Image.FromFile("d:\\mail16b.ico", true), FarPoint.Win.RenderStyle.Normal);
        control.PictureAlignH = FarPoint.Win.HorizontalAlignment.Center;
        control.PictureAlignV = FarPoint.Win.VerticalAlignment.Center;
        control.TextFalse = "Mail needs to be checked";
    }
    else
    {
        control.CheckState = CheckState.Indeterminate;
        control.TextIndeterminate = "No mail today";
    }
} 
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
     control.Checked = False
     control.BackgroundImage = New FarPoint.Win.Picture(Image.FromFile("d:\\mail16a.ico", True), FarPoint.Win.RenderStyle.Normal)
End Sub

Private Sub control_CheckChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles control.CheckChanged
     If control.CheckState = CheckState.Checked Then
          control.BackgroundImage = New FarPoint.Win.Picture(Image.FromFile("d:\\mail16a.ico", True), FarPoint.Win.RenderStyle.Normal)
          control.PictureAlignH = FarPoint.Win.HorizontalAlignment.Center
          control.PictureAlignV = FarPoint.Win.VerticalAlignment.Center
          control.TextTrue = "Mail's been checked"
     ElseIf control.CheckState = CheckState.Unchecked Then
          control.BackgroundImage = New FarPoint.Win.Picture(Image.FromFile("d:\\mail16b.ico", True), FarPoint.Win.RenderStyle.Normal)
          control.PictureAlignH = FarPoint.Win.HorizontalAlignment.Center
          control.PictureAlignV = FarPoint.Win.VerticalAlignment.Center
          control.TextFalse = "Mail needs to be checked"
     Else
          control.CheckState = CheckState.Indeterminate
          control.TextIndeterminate = "No mail today"
     End If
 End Sub
Requirements

Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows Server 2012 R2, Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10

See Also

Reference

FpCheckBox Class
FpCheckBox Members
Checked Property
CheckState enumeration

 

 

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