Answer to Question #182269 in Visual Basic for Martha

Question

In correspondence to the flowchart shown in Figure 1.1, develop an application that will store the salesperson’s code, which is to be entered in the codeTextBox, in an Integer variable named code. The application will need to store the sales amount, which is to be entered in the salesTextBox, in a decimal variable named sales. Display the result of the calculation, or the error message, in the messageLabel. Name your Program SalesAccount.

Answer 1

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class mainForm
    Inherits System.Windows.Forms.Form


    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        Try
            If disposing AndAlso components IsNot Nothing Then
                components.Dispose()
            End If
        Finally
            MyBase.Dispose(disposing)
        End Try
    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.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.codeTextBox = New System.Windows.Forms.TextBox()
        Me.Label2 = New System.Windows.Forms.Label()
        Me.salesTextBox = New System.Windows.Forms.TextBox()
        Me.btnCalculate = New System.Windows.Forms.Button()
        Me.messageLabel = New System.Windows.Forms.Label()
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(24, 40)
        Me.Label1.Margin = New System.Windows.Forms.Padding(5, 0, 5, 0)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(219, 20)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Enter the salesperson’s code:"
        '
        'codeTextBox
        '
        Me.codeTextBox.Location = New System.Drawing.Point(279, 35)
        Me.codeTextBox.Margin = New System.Windows.Forms.Padding(5)
        Me.codeTextBox.Name = "codeTextBox"
        Me.codeTextBox.Size = New System.Drawing.Size(103, 26)
        Me.codeTextBox.TabIndex = 1
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(68, 80)
        Me.Label2.Margin = New System.Windows.Forms.Padding(5, 0, 5, 0)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(178, 20)
        Me.Label2.TabIndex = 0
        Me.Label2.Text = "Enter the sales amount:"
        '
        'salesTextBox
        '
        Me.salesTextBox.Location = New System.Drawing.Point(279, 75)
        Me.salesTextBox.Margin = New System.Windows.Forms.Padding(5)
        Me.salesTextBox.Name = "salesTextBox"
        Me.salesTextBox.Size = New System.Drawing.Size(103, 26)
        Me.salesTextBox.TabIndex = 2
        '
        'btnCalculate
        '
        Me.btnCalculate.Location = New System.Drawing.Point(279, 125)
        Me.btnCalculate.Margin = New System.Windows.Forms.Padding(5)
        Me.btnCalculate.Name = "btnCalculate"
        Me.btnCalculate.Size = New System.Drawing.Size(103, 35)
        Me.btnCalculate.TabIndex = 3
        Me.btnCalculate.Text = "Calculate"
        Me.btnCalculate.UseVisualStyleBackColor = True
        '
        'messageLabel
        '
        Me.messageLabel.AutoSize = True
        Me.messageLabel.Location = New System.Drawing.Point(154, 171)
        Me.messageLabel.Margin = New System.Windows.Forms.Padding(5, 0, 5, 0)
        Me.messageLabel.Name = "messageLabel"
        Me.messageLabel.Size = New System.Drawing.Size(0, 20)
        Me.messageLabel.TabIndex = 0
        '
        'mainForm
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(9.0!, 20.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(421, 215)
        Me.Controls.Add(Me.btnCalculate)
        Me.Controls.Add(Me.salesTextBox)
        Me.Controls.Add(Me.messageLabel)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.codeTextBox)
        Me.Controls.Add(Me.Label1)
        Me.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(204, Byte))
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.Margin = New System.Windows.Forms.Padding(5)
        Me.MaximizeBox = False
        Me.Name = "mainForm"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "Sales Account"
        Me.ResumeLayout(False)
        Me.PerformLayout()


    End Sub
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents codeTextBox As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents salesTextBox As System.Windows.Forms.TextBox
    Friend WithEvents btnCalculate As System.Windows.Forms.Button
    Friend WithEvents messageLabel As System.Windows.Forms.Label


End Class

Main form

Public Class mainForm


    Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click

        Dim code As Integer = 0
        Dim sales As Decimal = 0
        If Integer.TryParse(codeTextBox.Text, code) = False Then
            messageLabel.Text = "Enter a correct code."
            Return
        End If
        If Decimal.TryParse(salesTextBox.Text, sales) = False Then
            messageLabel.Text = "Enter a correct sales."
        End If
        messageLabel.Text = "The total sales: " + sales.ToString("C")
    End Sub
End Class