Untitled

Public Class frmTaxComputation
    Dim annualTax As Double
    Dim isTrue As Boolean


    Private Sub cboPos_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cboPos.SelectedIndexChanged
        Dim pos As String
        pos = cboPos.Text

        Select Case pos
            Case "Administrative Assistant", "Business Analyst", "Liaison Officer", "Secretary"
                checkIfEmpty()
                If isTrue = True Then
                    clearAtMr()
                Else
                    txtMonthlyRate.Text = Format(30000, "##,###.00")
                    computeAnnualTax(30000)
                End If
            Case "Project Manager"
                checkIfEmpty()
                If isTrue = True Then
                    clearAtMr()
                Else
                    txtMonthlyRate.Text = Format(45000, "##,###.00")
                    computeAnnualTax(45000)
                End If
            Case "Software Developer"
                If isTrue = True Then
                    clearAtMr()
                Else
                    txtMonthlyRate.Text = Format(35000, "##,###.00")
                    computeAnnualTax(35000)
                End If
            Case "Human Resource Officer"
                If isTrue = True Then
                    clearAtMr()
                Else
                    txtMonthlyRate.Text = Format(40000, "##,###.00")
                    computeAnnualTax(40000)
                End If
            Case "Chief Executive Officer"
                If isTrue = True Then
                    clearAtMr()
                Else
                    txtMonthlyRate.Text = Format(100000, "###,###.00")
                    computeAnnualTax(100000)
                End If
            Case "Chief Operating Officer"
                If isTrue = True Then
                    clearAtMr()
                Else
                    txtMonthlyRate.Text = Format(85000, "##,###.00")
                    computeAnnualTax(85000)
                End If
        End Select

    End Sub

    Private Sub computeAnnualTax(monthlyRate As Integer)
        Dim annualRate As Double
        annualRate = monthlyRate * 12

        If annualRate < 250000 Then
            annualTax = 0
        ElseIf annualRate > 250000 And annualRate < 400000 Then
            annualTax = (annualRate - 250000) * 0.2
            txtAnnualTax.Text = Format(annualTax, "##,###.00")
        ElseIf annualRate > 400000 And annualRate < 800000 Then
            annualTax = 30000 + ((annualRate - 400000) * 0.25)
            txtAnnualTax.Text = Format(annualTax, "##,###.00")
        ElseIf annualRate > 80000 And annualRate < 2000000 Then
            annualTax = 130000 + ((annualRate - 800000) * 0.3)
            txtAnnualTax.Text = Format(annualTax, "###,###.00")
        ElseIf annualRate > 2000000 And annualRate < 8000000 Then
            annualTax = 490000 + ((annualRate - 2000000) * 0.32)
            txtAnnualTax.Text = Format(annualTax, "###,###.00")
        ElseIf annualRate > 8000000 Then
            annualTax = 2410000 + ((annualRate - 8000000) * 0.35)
            txtAnnualTax.Text = Format(annualTax, "#,###,###.00")
        End If
    End Sub

    Private Sub checkIfEmpty() 'Checks whether employee name or employee no text box is empty
        If txtEmployeeNo.Text = "" Or txtEmployeeName.Text = "" Then
            isTrue = True
        Else
            isTrue = False
        End If
    End Sub

    Private Sub clearAtMr() 'Clears annual tax & monthly rate
        txtAnnualTax.Text = ""
        txtMonthlyRate.Text = ""
        MsgBox("Please enter the correct Employee No.")
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Dim idFound As Boolean
        Dim employeeRecord(,) As String = New String(,) {
            {"1211", "Jose dela Cruz"},
            {"1111", "Sally Martinez"},
            {"1201", "Miesha Reyes"},
            {"1113", "Ramon Sy"},
            {"1212", "Joselito Silay"}
        }
        For i As Integer = 0 To employeeRecord.GetLength(0) - 1
            For j As Integer = 0 To employeeRecord.GetLength(1) - 1
                checkIfEmpty()
                If employeeRecord(i, j) = txtEmployeeNo.Text Then
                    idFound = True
                    txtEmployeeName.Text = employeeRecord(i, j + 1)
                ElseIf idFound = False Then
                    MsgBox("Employee No. not found.")
                    Exit For
                End If
            Next
            Exit For
        Next
    End Sub
End Class