Write a project in visual basic to do the Mathematical
operation (+,-,*, /, \ , mod, ^ ) and adding (print, Exit) to the
project by using (Button , RadioButton ,Checkbox) as shown
in figure below ?
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button1.Click
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a+b
TextBox3.Text = c.ToString
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button2.Click
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a-b
TextBox3.Text = c.ToString
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button3.Click
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a*b
TextBox3.Text = c.ToString
End Sub
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button4.Click
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a/b
TextBox3.Text = c.ToString
End Sub
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button5.Click
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a\b
TextBox3.Text = c.ToString
End Sub
Private Sub Button6_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button6.Click
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c = a Mod b
TextBox3.Text = c.ToString
End Sub
Private Sub Button7_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button7.Click
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a^b
TextBox3.Text = c.ToString
End Sub
Private Sub Button8_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button8.Click
PrintForm1.PrintAction = Printing.PrintAction.PrintToPreview
PrintForm1.Print()
End Sub
Private Sub Button9_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button9.Click
End
End Sub
Private Sub RadioButton1_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton1.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a+b
TextBox3.Text = c.ToString
End Sub
Private Sub RadioButton2_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton2.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a-b
TextBox3.Text = c.ToString
End Sub
Private Sub RadioButton3_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton3.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a*b
TextBox3.Text = c.ToString
End Sub
Private Sub RadioButton4_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton4.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a/b
TextBox3.Text = c.ToString
End Sub
Private Sub RadioButton5_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton5.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a\b
TextBox3.Text = c.ToString
End Sub
Private Sub RadioButton6_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton6.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c = a Mod b
TextBox3.Text = c.ToString
End Sub
Private Sub RadioButton7_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton7.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a^b
TextBox3.Text = c.ToString
End Sub
Private Sub RadioButton9_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton9.CheckedChanged
PrintForm1.PrintAction = Printing.PrintAction.PrintToPreview
PrintForm1.Print()
End Sub
Private Sub RadioButton8_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton8.CheckedChanged
End
End Sub
Private Sub CheckBox1_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox1.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a+b
TextBox3.Text = c.ToString
End Sub
Private Sub CheckBox2_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox2.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a-b
TextBox3.Text = c.ToString
End Sub
Private Sub CheckBox3_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox3.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a*b
TextBox3.Text = c.ToString
End Sub
Private Sub CheckBox4_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox4.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a/b
TextBox3.Text = c.ToString
End Sub
Private Sub CheckBox5_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox5.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a\b
TextBox3.Text = c.ToString
End Sub
Private Sub CheckBox6_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox6.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c = a Mod b
TextBox3.Text = c.ToString
End Sub
Private Sub CheckBox7_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox7.CheckedChanged
Dim a, b, c As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox2.Text)
c=a^b
TextBox3.Text = c.ToString
End Sub
Private Sub CheckBox8_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox8.CheckedChanged
PrintForm1.PrintAction = Printing.PrintAction.PrintToPreview
PrintForm1.Print()
End Sub
Private Sub CheckBox9_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox9.CheckedChanged
End
End Sub
End Class
Note :
1. We use the statements (dim) declares the variables and
their data types
Vb data type Use for
Boolean
True or false value
Byte
0 to 255 binary data
Char
Single Unicode charcter
Date
1/1/0001 to 12/31/9999
Decimal
Decimal fraction such as dollars and
cents
Single
Single
–precision
floating
point
numbers
Double
Double –precision floating point
numbers with 14 digits of accuracy
Short
Small integer in rang - 32,768 to 32,768
Integer
Whole number in range -2,147,483.648
to 2,147,483.648
Long
Larger whole numbers
String
Alphanumeric data,letters,digits and
other Characters
Objects
Any type of data
2.we use Parse Method to convert the textbox contents to
numeric and places the value into the variable
A= integer.parse(textbox1.text)
B=decimal.parse(textbox2.text)
3. we use Tostring Method to convert any of the numeric
data types to a string value.
Textbox3.text=C.Tostring()
Write a project in visual basic to input sales information for
book (Quantity, Title,Price) for Calculation the extended
price and discount for a sale when discount values is 15%
and adding (clear sales , print, Exit) to the project by using
(Button , RadioButton ,Checkbox) as shown in figure below?
Public Class Form1
Const Z As Decimal = 0.15D
Private Sub Button1_Click(ByVal sender As System.Object, ByVal
e As System.EventArgs) Handles Button1.Click
Dim a, b, c, f, h As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox3.Text)
c=a*b
f = Decimal.Round((c * Z), 2)
h=c-f
TextBox4.Text = c.ToString
TextBox5.Text = f.ToString
TextBox6.Text = h.ToString
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal
e As System.EventArgs) Handles Button2.Click
With TextBox1
.Clear()
.Focus()
End With
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
TextBox5.Clear()
TextBox6.Clear()
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal
e As System.EventArgs) Handles Button3.Click
PrintForm1.PrintAction = Printing.PrintAction.PrintToPreview
PrintForm1.Print()
End Sub
Private Sub Button4_Click(ByVal sender As System.Object, ByVal
e As System.EventArgs) Handles Button4.Click
End
End Sub
Private Sub RadioButton1_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton1.CheckedChanged
Dim a, b, c, f, h As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox3.Text)
c=a*b
f = Decimal.Round((c * Z), 2)
h=c-f
TextBox4.Text = c.ToString
TextBox5.Text = f.ToString
TextBox6.Text = h.ToString
End Sub
Private Sub RadioButton2_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton2.CheckedChanged
With TextBox1
.Clear()
.Focus()
End With
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
TextBox5.Clear()
TextBox6.Clear()
End Sub
Private Sub RadioButton3_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton3.CheckedChanged
PrintForm1.PrintAction = Printing.PrintAction.PrintToPreview
PrintForm1.Print()
End Sub
Private Sub RadioButton4_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
RadioButton4.CheckedChanged
End
End Sub
Private Sub CheckBox1_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox1.CheckedChanged
Dim a, b, c, f, h As Decimal
a = Decimal.Parse(TextBox1.Text)
b = Decimal.Parse(TextBox3.Text)
c=a*b
f = Decimal.Round((c * z), 2)
h=c-f
TextBox4.Text = c.ToString
TextBox5.Text = f.ToString
TextBox6.Text = h.ToString
End Sub
Private Sub CheckBox2_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox2.CheckedChanged
With TextBox1
.Clear()
.Focus()
End With
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
TextBox5.Clear()
TextBox6.Clear()
End Sub
Private Sub CheckBox3_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox3.CheckedChanged
PrintForm1.PrintAction = Printing.PrintAction.PrintToPreview
PrintForm1.Print()
End Sub
Private Sub CheckBox4_CheckedChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CheckBox4.CheckedChanged
End
End Sub
End Class
Note :
1. We use the statements (Const) declares the Constant
,as shown in project above .and use the variable in
project when need for it.
Const Z as decimal=0.15D
Where d at the end used to define the type of data.
2. The Decimal.Round method returns a decimal result to
the specified number of decimal positions,which can be
an integer in the range 0-28
f = Decimal.Round((c * Z), 2)
3. You can clear out the contents of a textbox or label by
setting the property to empty string use ""(no space
between the two quotation marks).this empty string is
also called a null string or zero-length string.you can
also clear out a textbox using the clear method or
setting the text property to string.empty note that the
clear method works for text boxes but not for labels.
Textbox1.text="" or
Textbox1.clear()
Label1.text=""
or
Label1.text=string.Empty
4. As your program runs,you want the insertion point to
appear in the textbox where the user is expected to type
. the focus should therefore begin in the first textbox .
if you clear the form textbox you should reset the focus
to the first textbox .the Focus method handles the
situation.
Textbox1.focus()
5. You specify an object name in the With statement.all
subsequent statements until the end with relate to the
object.
With textbox1
.visible=true
.forecolor=color.white
.focus()
End with