Public Class Form1
Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents c1 As System.Windows.Forms.CheckBox
Friend WithEvents txt1 As System.Windows.Forms.TextBox
Friend WithEvents Button1 As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.c1 = New System.Windows.Forms.CheckBox
Me.txt1 = New System.Windows.Forms.TextBox
Me.Button1 = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'c1
'
Me.c1.Font = New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
Me.c1.Location = New System.Drawing.Point(88, 96)
Me.c1.Name = "c1"
Me.c1.TabIndex = 0
Me.c1.Text = "box1"
'
'txt1
'
Me.txt1.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
Me.txt1.Location = New System.Drawing.Point(40, 32)
Me.txt1.Name = "txt1"
Me.txt1.Size = New System.Drawing.Size(192, 26)
Me.txt1.TabIndex = 2
Me.txt1.Text = "0.00"
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(72, 168)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(136, 32)
Me.Button1.TabIndex = 3
Me.Button1.Text = "Reset"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.txt1)
Me.Controls.Add(Me.c1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub c1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles c1.CheckedChanged
If c1.Checked = True Then
txt1.Text = 10
Else
txt1.Text = 0
End If
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
c1.Checked = False
End Sub
End Class
In here I have used a textbox = txt1, a checkbox = c1and a button = button1.
The purpose of the button1 is to reset the value of the check box to it’s default state thus the linked textbox txt1 will show 0.an incident happens when we click the button right after loading the application. There we don’t change the status (unchecked) to checked. At this moment when we click the button, the initial value of the textbox 0.00 stays as it is it doesn’t change to 0. But this situation changes if we change the status of the check box by clicking and change to “Checked” and then we press button the value in the textbox is set to 0 instead of 0.00. Why is this happening, please explain? Further more
“c1.Checked = False” in the “button1_Click“event handler procedure is an assignment operation or a comparison operation?
Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents c1 As System.Windows.Forms.CheckBox
Friend WithEvents txt1 As System.Windows.Forms.TextBox
Friend WithEvents Button1 As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.c1 = New System.Windows.Forms.CheckBox
Me.txt1 = New System.Windows.Forms.TextBox
Me.Button1 = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'c1
'
Me.c1.Font = New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
Me.c1.Location = New System.Drawing.Point(88, 96)
Me.c1.Name = "c1"
Me.c1.TabIndex = 0
Me.c1.Text = "box1"
'
'txt1
'
Me.txt1.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
Me.txt1.Location = New System.Drawing.Point(40, 32)
Me.txt1.Name = "txt1"
Me.txt1.Size = New System.Drawing.Size(192, 26)
Me.txt1.TabIndex = 2
Me.txt1.Text = "0.00"
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(72, 168)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(136, 32)
Me.Button1.TabIndex = 3
Me.Button1.Text = "Reset"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.txt1)
Me.Controls.Add(Me.c1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub c1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles c1.CheckedChanged
If c1.Checked = True Then
txt1.Text = 10
Else
txt1.Text = 0
End If
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
c1.Checked = False
End Sub
End Class
In here I have used a textbox = txt1, a checkbox = c1and a button = button1.
The purpose of the button1 is to reset the value of the check box to it’s default state thus the linked textbox txt1 will show 0.an incident happens when we click the button right after loading the application. There we don’t change the status (unchecked) to checked. At this moment when we click the button, the initial value of the textbox 0.00 stays as it is it doesn’t change to 0. But this situation changes if we change the status of the check box by clicking and change to “Checked” and then we press button the value in the textbox is set to 0 instead of 0.00. Why is this happening, please explain? Further more
“c1.Checked = False” in the “button1_Click“event handler procedure is an assignment operation or a comparison operation?