STUDENT MARKS CALCULATOR

Student Marks Caculator Source Code
Imports System.Text
Public Class Form1
    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        Application.Exit()
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        If validateform() Then
            If (chkfailinpaper() > 0) Then

            Else
                getresult()

            End If

        End If
    End Sub
    Public Function validateform() As Boolean
        Dim flag As Boolean = True
        If txtroll.Text.Length = 0 Then
            MsgBox("Enter Roll Number", MsgBoxStyle.Critical, "Alert Message")
            flag = False
            txtroll.Focus()
        ElseIf txtname.Text.Length = 0
            MsgBox("Enter Student Name", MsgBoxStyle.Critical, "Alert Message")
            flag = False
            txtname.Focus()
        ElseIf txtengmarks.Text.Length = 0
            MsgBox("Enter English Mars", MsgBoxStyle.Critical, "Alert Message")
            flag = False
            txtengmarks.Focus()
        ElseIf txthndmarks.Text.Length = 0
            MsgBox("Enter Hindi Marks", MsgBoxStyle.Critical, "Alert Message")
            flag = False
            txthndmarks.Focus()
        ElseIf txtmatmarks.Text.Length = 0
            MsgBox("Enter Math Marks", MsgBoxStyle.Critical, "Alert Message")
            flag = False
            txtmatmarks.Focus()
        ElseIf txtscimarks.Text.Length = 0
            MsgBox("Enter Science Marks", MsgBoxStyle.Critical, "Alert Message")
            flag = False
            txtscimarks.Focus()
        ElseIf txtsst.Text.Length = 0
            MsgBox("Enter S.St Marks", MsgBoxStyle.Critical, "Alert Message")
            flag = False
            txtsst.Focus()
        ElseIf Not (IsNumeric(txtengmarks.Text))
            MsgBox("Enter Only Numeric Value", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txtengmarks.Clear()
            txtengmarks.Focus()
        ElseIf Not (IsNumeric(txthndmarks.Text))
            MsgBox("Enter Only Numeric Value", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txthndmarks.Clear()
            txthndmarks.Focus()
        ElseIf Not (IsNumeric(txtmatmarks.Text))
            MsgBox("Enter Only Numeric Value", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txtmatmarks.Clear()
            txtmatmarks.Focus()
        ElseIf Not (IsNumeric(txtscimarks.Text))
            MsgBox("Enter Only Numeric Value", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txtscimarks.Clear()
            txtscimarks.Focus()
        ElseIf Not (IsNumeric(txtsst.Text))
            MsgBox("Enter Only Numeric Value", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txtsst.Clear()
            txtsst.Focus()
        ElseIf Integer.Parse(txtengmarks.Text) < 0 Or Integer.Parse(txtengmarks.Text) > 100
            MsgBox("Enter Value Between 0 to 100", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txtengmarks.Clear()
            txtengmarks.Focus()
        ElseIf Integer.Parse(txthndmarks.Text) < 0 Or Integer.Parse(txthndmarks.Text) > 100
            MsgBox("Enter Value Between 0 to 100", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txthndmarks.Clear()
            txthndmarks.Focus()
        ElseIf Integer.Parse(txtmatmarks.Text) < 0 Or Integer.Parse(txtmatmarks.Text) > 100
            MsgBox("Enter Value Between 0 to 100", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txtmatmarks.Clear()
            txtmatmarks.Focus()
        ElseIf Integer.Parse(txtscimarks.Text) < 0 Or Integer.Parse(txtscimarks.Text) > 100
            MsgBox("Enter Value Between 0 to 100", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txtscimarks.Clear()
            txtscimarks.Focus()
        ElseIf Integer.Parse(txtsst.Text) < 0 Or Integer.Parse(txtsst.Text) > 100
            MsgBox("Enter Value Between 0 to 100", MsgBoxStyle.Information, "Alert Message")
            flag = False
            txtsst.Clear()
            txtsst.Focus()
        End If
        Return flag
    End Function
    Public Sub getresult()
        Dim subject(5) As Double
        Dim tmarks, per As Double
        Dim grade As String = String.Empty
        subject(0) = Double.Parse(txtengmarks.Text)
        subject(1) = Double.Parse(txthndmarks.Text)
        subject(2) = Double.Parse(txtmatmarks.Text)
        subject(3) = Double.Parse(txtscimarks.Text)
        subject(4) = Double.Parse(txtsst.Text)

        For counter As Integer = 0 To 4
            tmarks = tmarks + subject(counter)
        Next

        per = tmarks / 5

        If per >= 60 Then
            grade = "A"c
        ElseIf per >= 45
            grade = "B"c
        ElseIf per >= 30
            grade = "C"c
        End If

        txtgrade.Text = grade
        txtper.Text = per.ToString
        totalmarks.Text = tmarks.ToString

    End Sub
    Public Function chkfailinpaper() As Integer
        Dim subject(5) As Double
        Dim strfailpaper As New StringBuilder
        Dim subname() As String = {"English", "Hindi", "Math", "Science", "S.St"}
        Dim countfailpaper As Integer = 0
        subject(0) = Double.Parse(txtengmarks.Text)
        subject(1) = Double.Parse(txthndmarks.Text)
        subject(2) = Double.Parse(txtmatmarks.Text)
        subject(3) = Double.Parse(txtscimarks.Text)
        subject(4) = Double.Parse(txtsst.Text)

        For counter As Integer = 0 To 4
            If subject(counter) < 30 Then
                strfailpaper.Append(subname(counter) & ",")
                countfailpaper = countfailpaper + 1
            End If
        Next
        If (countfailpaper > 0) Then
            clrres()
            MsgBox(strfailpaper.ToString, MsgBoxStyle.Critical, "Fail")
        End If
        Return countfailpaper
    End Function
    Public Sub clrres()
        txtgrade.Clear()
        txtper.Clear()
        totalmarks.Clear()
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        clearall()
    End Sub
    Public Sub clearall()
        txtroll.Clear()
        txtname.Clear()
        txtengmarks.Clear()
        txthndmarks.Clear()
        txtmatmarks.Clear()
        txtscimarks.Clear()
        txtsst.Clear()
        txtgrade.Clear()
        txtper.Clear()
        totalmarks.Clear()
        txtroll.Focus()
    End Sub

    Private Sub txtroll_TextChanged(sender As Object, e As EventArgs) Handles txtroll.TextChanged

    End Sub

    Private Sub txtroll_MouseHover(sender As Object, e As EventArgs) Handles txtroll.MouseHover
        ToolTip1.SetToolTip(txtroll, "Enter Roll Number")
    End Sub
    Private Sub txtname_MouseHover(sender As Object, e As EventArgs) Handles txtname.MouseHover
        ToolTip1.SetToolTip(txtname, "Enter Student Name")
    End Sub

    Private Sub dtpdob_MouseHover(sender As Object, e As EventArgs) Handles dtpdob.MouseHover
        ToolTip1.SetToolTip(dtpdob, "Select Date Of Birth")
    End Sub
    Private Sub txtengmarks_MouseHover(sender As Object, e As EventArgs) Handles txtengmarks.MouseHover
        ToolTip1.SetToolTip(txtengmarks, "Enter English Marks")
    End Sub
    Private Sub txthndmarks_MouseHover(sender As Object, e As EventArgs) Handles txthndmarks.MouseHover
        ToolTip1.SetToolTip(txthndmarks, "Enter Hindi Marks")
    End Sub
    Private Sub txtmatmarks_MouseHover(sender As Object, e As EventArgs) Handles txtmatmarks.MouseHover
        ToolTip1.SetToolTip(txtmatmarks, "Enter Math Marks")
    End Sub
    Private Sub txtscimarks_MouseHover(sender As Object, e As EventArgs) Handles txtscimarks.MouseHover
        ToolTip1.SetToolTip(txtscimarks, "Enter Science Marks")
    End Sub
    Private Sub txtsst_MouseHover(sender As Object, e As EventArgs) Handles txtsst.MouseHover
        ToolTip1.SetToolTip(txtsst, "Enter Social Science Marks")
    End Sub
End Class

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Click Here To Download Student Marks Calculator Application

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Calculate Rupee Program In Vb.Net

Calculate Rupee Program Source Code
Public Class frmcalrupess
    Private Sub btncalrup_Click(sender As Object, e As EventArgs) Handles btncalrup.Click
        If txtrupess.Text.Length = 0 Then
            MsgBox("Enter Rupess", MsgBoxStyle.Critical, "Alert Message")
            txtrupess.Focus()
            reini()
            rmvhighlight()
            Return
        ElseIf Not IsNumeric(txtrupess.Text) Then
            MsgBox("Enter Only Numeric Value", MsgBoxStyle.Critical, "Alert Message")
            txtrupess.Clear()
            txtrupess.Focus()
            reini()
            rmvhighlight()
            Return
        ElseIf Integer.Parse(txtrupess.Text) = 0 Then
            MsgBox("Enter Rupees is greater than zero", MsgBoxStyle.Critical, "Alert Message")
            txtrupess.Clear()
            txtrupess.Focus()
            reini()
            rmvhighlight()
            Return
        ElseIf Integer.Parse(txtrupess.Text) < 0 Then
            MsgBox("Enter only postive value", MsgBoxStyle.Critical, "Alert Message")
            txtrupess.Clear()
            txtrupess.Focus()
            reini()
            rmvhighlight()
            Return
        End If
        calrup()
    End Sub
    Public Sub calrup()
        Try
            Dim non() As Integer = {1000, 500, 100, 50, 20, 10, 5, 2, 1}

            Dim min, strresrup, tnon As Double
            tnon = 0
            strresrup = Math.Round(Double.Parse(txtrupess.Text), 0)
            txtrupess.Text = strresrup.ToString
            min = strresrup
            While strresrup <> 0
                For counter As Integer = 0 To non.Length - 1
                    If (non(counter) <= min) Then
                        strresrup = strresrup - non(counter)
                        tnon = tnon + 1
                        Exit For
                    End If
                Next
                min = strresrup
            End While


            Dim strnon(tnon - 1) As Integer

            tnon = 0
            strresrup = Math.Round(Double.Parse(txtrupess.Text), 0)

            min = strresrup
            While strresrup <> 0
                For counter As Integer = 0 To non.Length - 1
                    If (non(counter) <= min) Then
                        strnon(tnon) = non(counter)
                        strresrup = strresrup - non(counter)
                        tnon = tnon + 1
                        Exit For
                    End If
                Next
                min = strresrup
            End While

            reini()
            For counter As Integer = 0 To tnon - 1
                If (strnon(counter) = 1000) Then
                    txtthousand.Text = Integer.Parse(txtthousand.Text) + 1
                ElseIf (strnon(counter) = 500) Then
                    txtfhun.Text = Integer.Parse(txtfhun.Text) + 1
                ElseIf (strnon(counter) = 100) Then
                    txthun.Text = Integer.Parse(txthun.Text) + 1
                ElseIf (strnon(counter) = 50) Then
                    txtfifty.Text = Integer.Parse(txtfifty.Text) + 1
                ElseIf (strnon(counter) = 20) Then
                    txttwenty.Text = Integer.Parse(txttwenty.Text) + 1
                ElseIf (strnon(counter) = 10) Then
                    txtten.Text = Integer.Parse(txtten.Text) + 1
                ElseIf (strnon(counter) = 5) Then
                    txtfive.Text = Integer.Parse(txtfive.Text) + 1
                ElseIf (strnon(counter) = 2) Then
                    txttwo.Text = Integer.Parse(txttwo.Text) + 1
                ElseIf (strnon(counter) = 1) Then
                    txtone.Text = Integer.Parse(txtone.Text) + 1
                End If
            Next
            highlight()
        Catch ex As Exception

        End Try
    End Sub
    Public Sub reini()
        txtthousand.Text = "0"
        txtfhun.Text = "0"
        txthun.Text = "0"
        txtfifty.Text = "0"
        txttwenty.Text = "0"
        txtten.Text = "0"
        txtfive.Text = "0"
        txttwo.Text = "0"
        txtone.Text = "0"
    End Sub
    Public Sub highlight()
        If Integer.Parse(txtthousand.Text) > 0 Then
            txtthousand.BackColor = Color.Blue
            txtthousand.ForeColor = Color.White
        Else
            txtthousand.BackColor = Color.White
        End If
        If Integer.Parse(txtfhun.Text) > 0 Then
            txtfhun.BackColor = Color.Blue
            txtfhun.ForeColor = Color.White
        Else
            txtfhun.BackColor = Color.White
        End If
        If Integer.Parse(txthun.Text) > 0 Then
            txthun.BackColor = Color.Blue
            txthun.ForeColor = Color.White
        Else
            txthun.BackColor = Color.White
        End If
        If Integer.Parse(txtfifty.Text) > 0 Then
            txtfifty.BackColor = Color.Blue
            txtfifty.ForeColor = Color.White
        Else
            txtfifty.BackColor = Color.White
        End If
        If Integer.Parse(txttwenty.Text) > 0 Then
            txttwenty.BackColor = Color.Blue
            txttwenty.ForeColor = Color.White
        Else
            txttwenty.BackColor = Color.White
        End If
        If Integer.Parse(txtten.Text) > 0 Then
            txtten.BackColor = Color.Blue
            txtten.ForeColor = Color.White
        Else
            txtten.BackColor = Color.White
        End If
        If Integer.Parse(txtfive.Text) > 0 Then
            txtfive.BackColor = Color.Blue
            txtfive.ForeColor = Color.White
        Else
            txtfive.BackColor = Color.White
        End If
        If Integer.Parse(txttwo.Text) > 0 Then
            txttwo.BackColor = Color.Blue
            txttwo.ForeColor = Color.White
        Else
            txttwo.BackColor = Color.White
        End If
        If Integer.Parse(txtone.Text) > 0 Then
            txtone.BackColor = Color.Blue
            txtone.ForeColor = Color.White
        Else
            txtone.BackColor = Color.White
        End If
    End Sub
    Public Sub rmvhighlight()

        txtthousand.BackColor = Color.White
        txtthousand.ForeColor = Color.Black


        txtfhun.BackColor = Color.White
        txtfhun.ForeColor = Color.Black



        txthun.BackColor = Color.White
        txthun.ForeColor = Color.Black


        txtfifty.BackColor = Color.White
        txtfifty.ForeColor = Color.Black
       

        txttwenty.BackColor = Color.White
        txttwenty.ForeColor = Color.Black
       

        txtten.BackColor = Color.White
        txtten.ForeColor = Color.Black
       

        txtfive.BackColor = Color.White
        txtfive.ForeColor = Color.Black
       

        txttwo.BackColor = Color.White
        txttwo.ForeColor = Color.Black
       

        txtone.BackColor = Color.White
        txtone.ForeColor = Color.Black
       
    End Sub

    Private Sub frmcalrupess_Load(sender As Object, e As EventArgs) Handles MyBase.Load

    End Sub
End Class

Click Here To Download Output File For Calculate Rupee Program

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MINI CALCULATOR PROGRAM IN VB.NET

Source code
Public Class frmCalculator
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

    End Sub

    Private Sub btnresult_Click(sender As Object, e As EventArgs) Handles btnresult.Click
        If frmvaildate() Then
            Dim fnum, snum, result As Double
            Dim opt As String

            fnum = Double.Parse(txtfnumber.Text)
            snum = Double.Parse(txtsnum.Text)
            opt = txtopt.Text

            Select Case (opt)
                Case "+"
                    result = fnum + snum
                Case "-"
                    result = fnum - snum
                Case "*"
                    result = fnum * snum
                Case "/"
                    If snum = 0 Then
                        MessageBox.Show("No is not  div by zero")
                        Return
                    Else
                        result = fnum / snum
                    End If
                Case Else
                    MessageBox.Show("Invalid Operation")
                    txtopt.Clear()
                    txtopt.Focus()
                    Return
            End Select
            txtresult.Text = result.ToString()
        End If

    End Sub
    Public Function frmvaildate() As Boolean
        Dim flag As Boolean = True
        If (txtfnumber.Text.Length = 0) Then
            MessageBox.Show("Enter First Number")
            txtfnumber.Focus()
            flag = False
        ElseIf Not (IsNumeric(txtfnumber.Text))
            MessageBox.Show("Enter only numeric value")
            txtfnumber.Clear()
            txtfnumber.Focus()
            flag = False
        ElseIf txtsnum.Text.Length = 0
            MessageBox.Show("Enter Second Number")
            txtsnum.Focus()
            flag = False
        ElseIf Not (IsNumeric(txtsnum.Text))
            MessageBox.Show("Enter only numeric value")
            txtsnum.Clear()
            txtsnum.Focus()
            flag = False
        ElseIf txtopt.Text.Length = 0
            MessageBox.Show("Enter Operator")
            txtopt.Focus()
            flag = False
        End If
        Return flag
    End Function
    Private Sub txtfnumber_KeyDown(sender As Object, e As KeyEventArgs) Handles txtfnumber.KeyDown
        If (Integer.Parse(e.KeyCode()) = 13) Then
            txtsnum.Focus()
        End If
    End Sub
    Private Sub txtsnum_KeyDown(sender As Object, e As KeyEventArgs) Handles txtsnum.KeyDown
        If (Integer.Parse(e.KeyCode()) = 13) Then
            txtopt.Focus()
        End If
    End Sub
    Private Sub txtopt_KeyDown(sender As Object, e As KeyEventArgs) Handles txtopt.KeyDown
        If (Integer.Parse(e.KeyCode()) = 13) Then
            btnresult.Focus()
        End If
    End Sub

    Private Sub btnclear_Click(sender As Object, e As EventArgs) Handles btnclear.Click
        clear()
    End Sub
    Public Sub clear()
        txtfnumber.Clear()
        txtsnum.Clear()
        txtopt.Clear()
        txtresult.Clear()
        txtfnumber.Focus()
    End Sub
End Class

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Attendance Management System Program Using Array in Vb.net

Module Module1

    Sub Main()
        Dim studname() As String = {"Rakesh", "Mukesh", "Suresh", "Anil", "Vijay", "Prince"}
        Dim rollno() As Integer = {1001, 1002, 1003, 1004, 1005, 1006}
        Dim attendance(6) As Integer
        Dim counter As Integer = 0
        Dim attenstatus As String
        Dim attencounter As Integer = 0
        Dim totalstudent As Integer = 1
        Dim totabs, totpre As Integer
        totabs = 0
        totpre = 0
        While (totalstudent <= 6)
            Console.Write("Enter Studnet Roll No:-")
            Dim studroll As Integer = Integer.Parse(Console.ReadLine())
            Console.Write(counter)
            For Each studrollno As Integer In rollno
                If studrollno = studroll Then
                    Console.Write("Studnet Name:-" & studname(counter) & vbNewLine)
                    Console.Write("Enter P for Present and A for Absent:-")
                    attenstatus = Console.ReadLine()
                    If (attenstatus = "P") Then
                        attendance(attencounter) = 1
                        attencounter = attencounter + 1
                    ElseIf (attenstatus = "A")
                        attendance(attencounter) = 0
                        attencounter = attencounter + 1
                    End If
                End If
                counter = counter + 1
            Next
            counter = 0
            totalstudent = totalstudent + 1
        End While

        Console.Write("Student Name" & vbTab & "Attendance" & vbNewLine)
        For attendcounter As Integer = 0 To 5
            If attendance(attendcounter) = 0 Then
                totabs = totabs + 1
            ElseIf attendance(attendcounter) = 1
                totpre = totpre + 1
            End If
            Console.Write(studname(attendcounter) & vbTab & vbTab & attendance(attendcounter) & vbNewLine)
        Next
        Console.Write("Total Present Student=" & totpre & vbNewLine & "Total Absent Student=" & totabs)
    End Sub

End Module

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Download Bitwise Operator Presentation File 

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