Tuesday, May 10, 2011

Methods 2.0

Grab the code below and try to arrange the code into logical groups of code.  Here are some pointers:
1. Create a single method that will be responsible for creating the place holder for each of the dice numbers.
 a. You will likely need to pass the label in as an attribute in the method call
2. Create a single method that will be responsible for adding the button and 3 stats text boxes
3. Add a method who's job is just to roll the dice.
4. Add a method who's job is to collect the stats of how many there are of each number
5. Add a method who's job is to update the stats textboxes
6. Add comments to the code blocks to explain what is going on.

 Public Class Form1
  
   'Declare all variables
  
   Dim lblDice1, lblDice2, lblDice3, lblDice4, lblDice5 As New Label
  
   Dim WithEvents butRoll As New Button
  
   Dim nYatzee, nFourOfAKind, nThreeOfAKind As New Integer
  
   Dim lblYatzee, lblFourOfAKind, lblThreeOfAKind As New TextBox
  
   Dim rnd As New Random
  
   Private Sub addDice(ByRef lbl As Label, ByVal x As Integer, ByVal y As Integer)
  
     'Code labels for dice roll
  
     lbl.Text = 0
  
     lbl.Location = New Point(x, y)
  
     lbl.Font = New Drawing.Font("Microsoft Sans Serif", 28.0F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point)
  
     lbl.Height = 40
  
     lbl.Width = 40
  
     Me.Controls.Add(lbl)
  
   End Sub
  
   Private Sub addCounts(ByRef ctxt As TextBox, ByVal c As Integer, ByVal d As Integer, ByVal e As String)
  
     'Code for counters
  
     ctxt.Text = e
  
     ctxt.Location = New Point(c, d)
  
     ctxt.Width = 150
  
     Me.Controls.Add(ctxt)
  
   End Sub
  
   Private Sub addRoll(ByRef butr As Button, ByVal s As String, ByVal t As Integer, ByVal u As Integer)
  
     'Button coding
  
     butRoll.Text = s
  
     butRoll.Location = New Point(t, u)
  
     Me.Controls.Add(butRoll)
  
   End Sub
  
   Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
  
     'Dice rolls
  
     addDice(lblDice1, 10, 20)
  
     addDice(lblDice2, 70, 20)
  
     addDice(lblDice3, 130, 20)
  
     addDice(lblDice4, 190, 20)
  
     addDice(lblDice5, 250, 20)
  
     'Adding counters
  
     addCounts(lblYatzee, 20, 140, "Yatzees: 0")
  
     addCounts(lblFourOfAKind, 20, 180, "Four Of A Kind: 0")
  
     addCounts(lblThreeOfAKind, 20, 220, "Three Of A Kind: 0")
  
     'Add button
  
     addRoll(butRoll, "Roll", 100, 90)
  
   End Sub
  
   Private Sub codeDice(ByRef codelbl As Label)
  
     'Dice code
  
     codelbl.Text = rnd.Next(1, 7)
  
   End Sub
  
   Private Sub getTotal()
  
     'Declare variable for total
  
     Dim arrNumbers() As Integer = {0, 0, 0, 0, 0, 0}
  
     For Each lbl As Label In Me.Controls.OfType(Of Label)()
  
       arrNumbers(lbl.Text - 1) += 1
  
     Next
  
     'Completes 3-of-a-kind, 4-of-a-king, and yahtzee!
  
     For Each i As Integer In arrNumbers
  
       If i = 5 Then
  
         nYatzee += 1
  
       ElseIf i = 4 Then
  
         nFourOfAKind += 1
  
       ElseIf i = 3 Then
  
         nThreeOfAKind += 1
  
       End If
  
     Next
  
   End Sub
  
   Private Sub nameLabel()
  
     'Displays total for 3-of-a-kind, 4-of-a-king, and yahtzee
  
     lblYatzee.Text = "Yatzees: " & nYatzee
  
     lblFourOfAKind.Text = "Four Of A Kind: " & nFourOfAKind
  
     lblThreeOfAKind.Text = "Three Of A Kind: " & nThreeOfAKind
  
   End Sub
  
   Private Sub RollDice() Handles butRoll.Click
  
     'Call dice roll to form
  
     codeDice(lblDice1)
  
     codeDice(lblDice2)
  
     codeDice(lblDice3)
  
     codeDice(lblDice4)
  
     codeDice(lblDice5)
  
     'Call total to form
  
     getTotal()
  
     'Call display to form
  
     nameLabel()
  
   End Sub
  
 End Class  

Practice 6: Methods

Create the program
that you see on the right. The program
will allow long text to inputted into it through a textbox. When the user clicks "Analyze", it
will do 4 things:
  1. Count the total characters
  2. Count the words
  3. Count the sentences
  1. Count the spaces

I want each of these
counts to be calculated in their own functions. Name these functions according to what is happening inside of it.

You should also have
a sub who's job is to update the text boxes with the proper counts.

You will have to do
some googling to figure out how to do word and sentence counts. Spaces and total chars should be pretty
straight forward.

 Public Class Form1
  
   Public Function SentenceSetup(ByVal InputString As String) As Integer
  
     Dim period, qm, ex As Integer
  
     period = InputString.Split(".").Length
  
     qm = InputString.Split("?").Length
  
     ex = InputString.Split("!").Length
  
     Return (period + qm + ex) / 2
  
   End Function
  
   Private Sub btnAnalyze_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAnalyze.Click
  
     'Count characters
  
     txtChar.Text = AnalyzeText.Text.Length.ToString
  
     'Count words
  
     Dim str As String = AnalyzeText.Text
  
     Dim strA() As String = str.Split(" ")
  
     Dim TChrs As Int32
  
     Dim i As Int32
  
     For i = strA.Length - 1 To 0 Step -1
  
       TChrs += strA(i).Length
  
     Next
  
     txtWords.Text = strA.Length
  
     'Count spaces
  
     Dim Spaces As Integer = 0
  
     For Each s As String In AnalyzeText.Text
  
       If s = " " Then
  
         Spaces += 1
  
       End If
  
     Next
  
     txtSpace.Text = Spaces
  
     'Count Sentences
  
     txtSentence.Text = SentenceSetup(AnalyzeText.Text)
  
   End Sub
  
 End Class  

Arrays Assignment

1. Create a string array that
will store the days of the week. The array should fill when the form loads. Add a button (you can drag it on the
form). When the button is clicked,
loop through the array and pop up a message box for each day of the
week.

  Private Sub Button1_Click(ByVal sender As System.Object,
  
  ByVal e As System.EventArgs) Handles Button1.Click
  
     Dim week As New Hashtable
  
     Dim daysofweek As DictionaryEntry
  
     week.Add("1", "Sunday")
  
     week.Add("2", "Monday")
  
     week.Add("3", "Tuesday")
  
     week.Add("4", "Wednesday")
  
     week.Add("5", "Thursday")
  
     week.Add("6", "Friday")
  
     week.Add("7", "Saturday")
  
     For Each daysofweek In week
  
       MsgBox("" & daysofweek.Value)
  
     Next
  
   End Sub
  
 End Class  


2. Create a form with textboxes
for the following:
 - first name
 - last name
 - email.
Add labels to describe each box.
Add a button for adding the user. The add user button click event will do the following:
 - add the user information
into a hashtable
 - clear the text from the
text boxes

We want to add the information into the hashtable using three keys:
FirstName, LastName, Email.

Add First Name, Last Name, and Email buttons to the bottom of the
form. Each of these buttons is
going to fire off a message box that will show the information that was
just added in.


 Public Class Form1
  
   Dim adduser As New Hashtable
  
   Private Sub btFirst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btFirst.Click
  
     MessageBox.Show(txtFirst.Text)
  
   End Sub
  
   Private Sub btnLast_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLast.Click
  
     MessageBox.Show(txtLast.Text)
  
   End Sub
  
   Private Sub btnEmail_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEmail.Click
  
     MessageBox.Show(txtEmail.Text)
  
   End Sub
  
   Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
  
     adduser.Clear()
  
     adduser.Add("txtFirst", txtFirst.Text)
  
     adduser.Add("txtLast", txtLast.Text)
  
     adduser.Add("txtEmail", txtEmail.Text)
  
     txtFirst.Clear()
  
     txtLast.Clear()
  
     txtEmail.Clear()
  
   End Sub
  
 End Class  



  1. Create a form that will work
    as a printer queue. This form will
    have the following inputs:
    1. Title of the
      document
    2. Pages to be printed

When
submitted the click event will do the following:
  1. Add the title and pages to a
    hashtable
  2. Add the hashtable to a queue
    which is a class variable
  3. Clear the title and set the
    pages back to one
  4. Refresh the queue list.

The
Clear Current button will:
  1.  remove the next item in the queue
  2. Refresh the queue list
    box 
 Public Class Printer
  
   Dim jobs As New Queue
  
   Private Sub btnSendJob_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSendJob.Click
  
     Dim qlist As New Hashtable
  
     jobs.Enqueue(qlist)
  
     qlist.Add("Title", txtTitle.Text)
  
     qlist.Add("Pages", NumericUpDown1.Value)
  
     refreshalljobs()
  
     NumericUpDown1.Value = 1
  
     txtTitle.Text = ""
  
   End Sub
  
   Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
  
     If jobs.Count > 0 Then
  
       jobs.Dequeue()
  
     End If
  
     refreshalljobs()
  
   End Sub
  
   Private Sub refreshalljobs()
  
     qlist.Items.Clear()
  
     For Each hash As Hashtable In jobs
  
       qlist.Items.Add(hash.Item("Title") & "(" & hash.Item("Pages") & ")")
  
     Next
  
   End Sub
  
 End Class