Я новичок в VB.NET. Я создал простую программу-калькулятор с помощью VS Express Studio 2010. Все арифметические операции работают правильно, но я не могу отображать символы оператора в текстовом поле. Пожалуйста, проверьте мой код и предложите мне некоторые модификации.
Форма публичного класса1
Dim Value1, Value2 As Double
Dim Value3, Value4 As Double
Dim Value5, Value6 As Double
Dim Valuex, Valuey As Double
Dim Symbol As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Text = TextBox1.Text & "1"
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
TextBox1.Text = TextBox1.Text & "2"
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
TextBox1.Text = TextBox1.Text & "3"
End Sub
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
TextBox1.Text = TextBox1.Text & "4"
End Sub
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
TextBox1.Text = TextBox1.Text & "5"
End Sub
Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
TextBox1.Text = TextBox1.Text & "6"
End Sub
Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click
TextBox1.Text = TextBox1.Text & "7"
End Sub
Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button8.Click
TextBox1.Text = TextBox1.Text & "8"
End Sub
Private Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click
TextBox1.Text = TextBox1.Text & "9"
End Sub
Private Sub Button10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button10.Click
TextBox1.Text = TextBox1.Text & "0"
End Sub
Private Sub Button11_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click
TextBox1.Text = TextBox1.Text & "."
End Sub
Private Sub Button12_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bclear.Click
TextBox1.Clear()
End Sub
Private Sub Button13_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Badd.Click
Value1 = Val(TextBox1.Text)
Symbol = "+"
TextBox1.Text = ""
End Sub
Private Sub Button14_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bsub.Click
Value1 = Val(TextBox1.Text)
Symbol = "-"
TextBox1.Text = ""
End Sub
Private Sub Button15_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bmul.Click
Value1 = Val(TextBox1.Text)
Symbol = "*"
TextBox1.Text = ""
End Sub
Public Sub Button16_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bdiv.Click
Value1 = Val(TextBox1.Text)
Symbol = "/"
If Symbol = "/" Then
Value4 = Value1 'To calculate the % we assign Value1 to Value4
End If
TextBox1.Text = ""
End Sub
Private Sub Button17_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bpercent.Click
Value5 = Val(TextBox1.Text)
Value6 = (Value4 / Value5) * 100
TextBox1.Text = Value6 'This will display the % when two numbers are divided & the % button is clicked
'---------------------------------------------------------------------------------------------------------------------------------
If Symbol = "%" Then
Valuey = Valuex * 100
TextBox1.Text = Valuey
'This will display the Value of the percentage when % button is clicked
' when two values are divided & the result is displayed
'then after pressing % button will display the % value
End If
End Sub
Private Sub Button18_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bequal.Click
Value2 = Val(TextBox1.Text)
If Symbol = "+" Then
Value3 = Value1 + Value2
End If
If Symbol = "-" Then
Value3 = Value1 - Value2
End If
If Symbol = "*" Then
Value3 = Value1 * Value2
End If
If Symbol = "/" Then
Value3 = Value1 / Value2
End If
TextBox1.Text = " = " & Value3
Valuex = Value3
Symbol = "%"
End Sub
Конец класса
