CheckChanged Event | Spread Windows Forms 13.0 Product Documentation

CheckChanged Event

In This Topic

Occurs when the check state of the control has changed.

Syntax

Visual Basic
C#

'Declaration
 
Public Event CheckChanged As EventHandler

'Usage
 
Dim instance As FpCheckBox
Dim handler As EventHandler
 
AddHandler instance.CheckChanged, handler

public event EventHandler CheckChanged

Remarks

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

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";
    }
}

Visual Basic

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

Reference

FpCheckBox Class
FpCheckBox Members
Checked Property
CheckState Property

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