It's more fun to create simple application in VB.Net with less amount of code. Just simply drag and drop controls. Since, Visual Basic.Net provides features where you can create quickapplication in a minute. In this tutorial, I’ll show you how to create simple calculator in Visual Basic.Net. Unfortunately, it only covers very simple calculation with four arithmetic operators such as Addition, Subtraction, Multiplication, and Division.
Here is the sample screenshot.
Here is the sample screenshot.
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| Simple Calculator in Visual Basic.Net |
Source code:
Option Explicit On
Public Class frmcalculator
Dim number1 As Single
Dim number2 As Single
Dim answer As Single
Dim arithmeticoperator As String
Private Sub btn1_Click(sender As System.Object, e As System.EventArgs) Handlesbtn1.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "1"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "1"
End If
End Sub
Private Sub btn2_Click(sender As System.Object, e As System.EventArgs) Handlesbtn2.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "2"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "2"
End If
End Sub
Private Sub btn3_Click(sender As System.Object, e As System.EventArgs) Handlesbtn3.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "3"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "3"
End If
End Sub
Private Sub btn4_Click(sender As System.Object, e As System.EventArgs) Handlesbtn4.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "4"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "4"
End If
End Sub
Private Sub btn5_Click(sender As System.Object, e As System.EventArgs) Handlesbtn5.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "5"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "5"
End If
End Sub
Private Sub btn6_Click(sender As System.Object, e As System.EventArgs) Handlesbtn6.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "6"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "6"
End If
End Sub
Private Sub btn7_Click(sender As System.Object, e As System.EventArgs) Handlesbtn7.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "7"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "7"
End If
End Sub
Private Sub btn8_Click(sender As System.Object, e As System.EventArgs) Handlesbtn8.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "8"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "8"
End If
End Sub
Private Sub btn9_Click(sender As System.Object, e As System.EventArgs) Handlesbtn9.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "9"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "9"
End If
End Sub
Private Sub btn0_Click(sender As System.Object, e As System.EventArgs) Handlesbtn0.Click
If txtdisplaynumber.Text = "0" Then
txtdisplaynumber.Text = "0"
Else
txtdisplaynumber.Text = txtdisplaynumber.Text & "0"
End If
End Sub
Private Sub Button14_Click(sender As System.Object, e As System.EventArgs) HandlesButton14.Click
txtdisplaynumber.Text = txtdisplaynumber.Text & "."
End Sub
Private Sub btnplus_Click(sender As System.Object, e As System.EventArgs) Handlesbtnplus.Click
number1 = Val(txtdisplaynumber.Text)
txtdisplaynumber.Text = "0"
arithmeticoperator = "+"
End Sub
Private Sub btnx_Click(sender As System.Object, e As System.EventArgs) Handlesbtnx.Click
number1 = Val(txtdisplaynumber.Text)
txtdisplaynumber.Text = "0"
arithmeticoperator = "x"
End Sub
Private Sub btndivide_Click(sender As System.Object, e As System.EventArgs) Handlesbtndivide.Click
number1 = Val(txtdisplaynumber.Text)
txtdisplaynumber.Text = "0"
arithmeticoperator = "/"
End Sub
Private Sub btnminus_Click(sender As System.Object, e As System.EventArgs) Handlesbtnminus.Click
number1 = Val(txtdisplaynumber.Text)
txtdisplaynumber.Text = "0"
arithmeticoperator = "-"
End Sub
Private Sub btnequals_Click(sender As System.Object, e As System.EventArgs) Handlesbtnequals.Click
number2 = Val(txtdisplaynumber.Text)
'Addition
If arithmeticoperator = "+" Then
answer = number1 + number2
End If
'Subtraction
If arithmeticoperator = "-" Then
answer = number1 - number2
End If
'Multiplication
If arithmeticoperator = "x" Then
answer = number1 * number2
End If
'Division
If arithmeticoperator = "/" Then
answer = number1 / number2
End If
'Result
txtdisplaynumber.Text = answer
End Sub
Private Sub btnclear_Click(sender As System.Object, e As System.EventArgs) Handlesbtnclear.Click
txtdisplaynumber.Text = "0" 'Enable to clear
End Sub
Private Sub ExitToolStripMenuItem_Click(sender As System.Object, e AsSystem.EventArgs) Handles ExitToolStripMenuItem.Click
Me.Close()
End Sub
End Class
+++++++++++
Source:
solve Multiple expressions in one line . Here is a calculator for that . Download with source code from here :-
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