Question

Create an application that tracks electric motors in a manufacturing plant. The application should have a Motor class with the following properties:

MotorId: Five digit string, such as "02340"

Description: String

RPM: Double, values in the range 10 to 10000

Voltage: Double, values in the range 1 to 500

Status: String, three characters

The Status values are:

ON: Motor is online and running

OFF: Motor is online but not running

MNT: Motor is undergoing maintenance and cleaning

NA: Motor isn't available

The application should be able to store Motor class objects in the List collection. Create an input Form in the application that allows users to input new motor records to be added to the List. Create another form that displays all the motors in the List in a list box.

When the application ends, it should save the contents of the List collection to a sequential text file. When the application starts up, it should load the data from the file into the collection. Be sure to write the appropriate error handlers.

Need Written in C#, Thanks

Answer 1

Answer:

Motor Class Application:
Step 1: Create a new Windows Forms Application project named Motor class.

Step 2: Set up the application’s form as shown in figures.

  

  

Step 3: Perform the following steps to add a new class to the project:
1. Click Project on the menu bar, and then click Add Class.

2. In the Add New Item dialog box, make sure Class is selected in the Templates pane. In the Name text box, type Motor.vb

3. Click the Add button.

Step 4: A new class file is created and opened in the Code window. The contents of the class appear as follows:
Public class address

End class

Step 5: Complete the class by entering the following code shown in bold.

Public Class motor

Member variables for Id, Description, RPM, Voltage, Status.

Private id As String

Private Description As String

Private RPM As Double

Private Voltage As Double

Private Status As String

'Constructor to initialize member variables.

Public Sub New()

id = 101

Description = "weel"

RPM = 100

Voltage = 200

Status = "ON"

End Sub

'MotorId Property.

Public Property MotorId() As String

Get

Return id

End Get

Set(ByVal value As String)

id = value

End Set

End Property

'Description Property.

Public Property Desc() As String

Get

Return Description

End Get

Set(ByVal value As String)

id = Description

End Set

End Property

'RPM Property

Public Property MotorRPM() As String

Get

Return RPM

End Get

Set(ByVal value As String)

id = RPM

End Set

End Property

'Voltage Property

Public Property MotorVoltage() As String

Get

Return Voltage

End Get

Set(ByVal value As String)

id = Voltage

End Set

End Property

'Status Property

Public Property MotorStatus() As String

Get

Return Status

End Get

Set(ByVal value As String)

id = Status

End Set

End Property

'Overrides ToString Method

Public Overrides Function ToString() As String

Dim str As String

str = "MitorId:" & id & "," & "Description:" & Description & "," & "RPM:" & RPM & "," & "Voltage:" & Voltage & "," & "Status:" & Status

Return str

End Function

End Class

Step 6: Add a module named MotorModule.vb to the project. Complete the module by entering the following code, shown in bold.

Module MotorModule

'Collection for motor list

Public motorCollection As New Collection

'The addMotor procedure adds a motor object to the collection and uses the Id property as the key

Public Sub addMotor(ByVal objmotor As motor)

Try

motorCollection.Add(objmotor, objmotor.MotorId)

Catch ex As Exception

MessageBox.Show(ex.Message)

End Try

End Sub

End Module

Step 7: Now write the procedures and event handlers for the MainForm form, shown in below. To create the code template, simply open MainForm in the Designer window and double-click and write following Code

Public Class Form1

'The Get Data procedure assigns values from the form to a motor object's properties

Private Sub getData(ByVal objMotor As motor)

Try

'Get all information

objMotor.MotorId = txtId.Text

objMotor.Desc = txtDesc.Text

objMotor.MotorRPM = txtRpm.Text

objMotor.MotorVoltage = txtVoltage.Text

objMotor.MotorStatus = txtStatus.Text

Catch ex As Exception

'Error Message

MessageBox.Show("Enter proper values for all entries")

End Try

End Sub

'The ClearForm procedure claers the form

Private Sub clearForm()

txtDesc.Clear()

txtId.Clear()

txtRpm.Clear()

txtStatus.Clear()

txtVoltage.Clear()

'Set the focus

txtId.Focus()

End Sub

Private Sub btnExit_Click(ByVal sender As System. Object, ByVal e As System.EventArgs) Handles btnExit.Click

'Close the form

Me. Close()

End Sub

Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click

'Create an instance of the motor class.

Dim objmotor As New motor

'Get data from the form.

getData(objmotor)

'Add the motor object to the collection

addMotor(objmotor)

'Display a confirmation message.

MessageBox.Show("Motor record added successfully")

End Sub

Private Sub btnDisplay_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplay.Click

'Create an instance of the display form

Dim frmDisplay As New disp

'Display the form

frmDisplay.showDialog()

End Sub

End Class

Step 8: write the procedures and event handlers for the addMotor form, shown in below. To create the code template, simply open addMotor Form in the Designer window and double-click and write the following code.

Public Class disp

Private Sub disp_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

‘Declare an object variable that can reference a motor object

Dim objmotor As motor

'Get each object in the collection and add its data to the list box

For Each objmotor In motorCollection

lstOut.Items.Add(objmotor.ToString())

Next

End Sub Private Sub btnClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClose.Click
'Close the form

Me. Close()

End Sub

End Class

Step 9: Save the project and run application. On the main form, add data for motor list, and then click add button.Repeate this for at least 10 motor lists. Click the display button to see a list of motors you have added.