Download - Cla 245526 Gui
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GUI Lab Window programs
VB application to illustrate button events
Public Class Form1
Dim NW As New Form2
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Text = “Welcome”
End Sub
Private Sub Button1_MouseEnter(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MouseEnter
me.BackClor=Color.red
End Sub
Private Sub Button1_MouseLeave(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MouseLeave
Button1.BackClor=Color.blue
End Sub
End Class
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VB application to cut and copy using button event
Public Class Form1
Dim NW As New Form2
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox2.Text = TextBox1.Text
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox2.Text = TextBox1.Text
TextBox1.Text = “ “
End Sub
End Class
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VB application to create button at runtime
Public Class Form1
Dim WithEvents Button2 As Button
Dim WithEvents Button3 As Button
Dim WithEvents Button4 As Button
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If (Button2 Is Nothing) Then
Button2 = New Button
Button2.Size = New Size(80, 30)
Button2.Location = New Point(115, 20)
Button2.Text = "Button2"
Button2.BackColor = Color.Blue
Controls.Add(Button2)
AddHandler Button2.Click, AddressOf Button_Click
End If
If (Button3 Is Nothing) Then
Button3 = New Button
Button3.Size = New Size(80, 30)
Button3.Location = New Point(115, 60)
Button3.Text = "Button3"
Button3.BackColor = Color.Red
Controls.Add(Button3)
AddHandler Button3.Click, AddressOf Button_Click
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End If
If (Button4 Is Nothing) Then
Button4 = New Button
Button4.Size = New Size(80, 30)
Button4.Location = New Point(115, 100)
Button4.Text = "Button4"
Button4.BackColor = Color.Green
Controls.Add(Button4)
AddHandler Button4.Click, AddressOf Button_Click
End If
End Sub
Private Sub Button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
If sender Is Button2 Then
TextBox1.Text = "you clicked Button:2"
End If
If sender Is Button3 Then
TextBox1.Text = "you clicked Button:3"
End If
If sender Is Button4 Then
TextBox1.Text = "you clicked Button:4"
End If
End Sub
End Class
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/* Window application for Message Box */
Public Class Form1
Dim r As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim res As Integer
res = MsgBox("This is a message box!", MsgBoxStyle.OkCancel)
If (res = MsgBoxResult.Ok) Then
TextBox1.Text = "you Clicked on OK"
End If
End Sub
End Class
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VB application to communicate with two different forms
‘form-1 creation
Public Class Form1
Dim NW As New Form2
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Text = NW.TextBox1.Text
End Sub
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
NW.Show()
End Sub
End Class
‘Form-2 creation
Public Class Form2
End Class
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VB application to illustrate check box with button event
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If (CheckBox1.Checked = True And CheckBox2.Checked = True And CheckBox3.Checked = True) Then
TextBox1.Text = "You check mark_1&2&3 is checked"
ElseIf (CheckBox1.Checked = True And CheckBox2.Checked = True) Then
TextBox1.Text = "You check mark_1&2 is checked"
ElseIf(CheckBox1.Checked = True And CheckBox3.Checked = True) Then
TextBox1.Text = "You check mark_1&3 is checked"
ElseIf (CheckBox2.Checked = True And CheckBox3.Checked = True) Then
TextBox1.Text = "You check mark_2&3 is checked"
ElseIf (CheckBox1.Checked = True) Then
TextBox1.Text = "You check mark_1 is checked"
ElseIf (CheckBox2.Checked = True) Then
TextBox1.Text = "You check mark_1 is checked"
ElseIf (CheckBox3.Checked = True) Then
TextBox1.Text = "You check mark_1 is checked"
End If
End Sub
End Class
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VB application to illustrate radio button
Public Class Form1
Private Sub RadioButton1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged
TextBox1.Text = "You are Male Student"
End Sub
Private Sub RadioButton2_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton2.CheckedChanged
TextBox1.Text = "You are Female Student"
End Sub
Private Sub RadioButton3_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton3.CheckedChanged
TextBox2.Text = "I-Year Student"
End Sub
Private Sub RadioButton4_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton4.CheckedChanged
TextBox2.Text = "II-Year Student"
End Sub
Private Sub RadioButton5_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton5.CheckedChanged
TextBox2.Text = "III-Year Student"
End Sub
Private Sub RadioButton6_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton6.CheckedChanged
TextBox2.Text = "IV-Year Student"
End Sub End Class
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VB application to illustrate Combo Box
Public Class Form1
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
TextBox1.Text = ComboBox1.SelectedItem
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ComboBox1.Items.Add("Govt Emp")
ComboBox1.Items.Add("Business")
ComboBox1.Items.Add("Farmer")
ComboBox1.Items.Add("Private Emp")
ComboBox1.Text = "Profession"
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
ComboBox1.Items.Clear()
End Sub
End Class
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VB application to illustrate List Box
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Arr() = {"Wgl", "Kmm", "Krm", "Adb"}
ListBox1.BeginUpdate()
ListBox1.Items.Add("One")
ListBox1.Items.Add("Two")
ListBox1.Items.Add("Three")
ListBox1.Items.Add("Four")
ListBox1.Items.Add("Five")
ListBox1.Items.AddRange(Arr)
ListBox1.SetSelected(1, True)
ListBox1.EndUpdate()
End Sub
Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
TextBox1.Text = ListBox1.SelectedItem
End Sub
End Class
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VB application to illustrate Checked List Box
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
CheckedListBox1.BeginUpdate()
CheckedListBox1.Items.Add("SSC", True)
CheckedListBox1.Items.Add("Inter", True)
CheckedListBox1.Items.Add("B.Tech", True)
CheckedListBox1.Items.Add("M.Tech", False)
CheckedListBox1.Items.Add("Phd", False)
CheckedListBox1.EndUpdate()
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
For Ind = 0 To CheckedListBox1.Items.Count - 1
CheckedListBox1.SetItemChecked(Ind, True)
Next
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
For Ind = 0 To CheckedListBox1.Items.Count - 1
If CheckedListBox1.GetItemChecked(Ind) = True Then
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TextBox1.Text &= CheckedListBox1.Items(Ind)
End If
Next
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
For Ind = 0 To CheckedListBox1.Items.Count - 1
CheckedListBox1.SetItemChecked(Ind, False)
Next
End Sub
End Class
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VB application to illustrate date and time picker
Public Class Form1
Private Sub DateTimePicker1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DateTimePicker1.ValueChanged
TextBox1.Text = "Date Selected" & DateTimePicker1.Text
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'DateTimePicker1.Format = DateTimePickerFormat.Custom
'DateTimePicker1.CustomFormat = "MMMM dd yyyy hh:mm:ss tt"
End Sub
End Class
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/* Window application for Picture box */
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If (OpenFileDialog1.ShowDialog() <> DialogResult.Cancel) Then
PictureBox1.Image = Image.FromFile(OpenFileDialog1.FileName)
End If
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
PictureBox1.ClientSize = New Size(300, 300)
End Sub
Private Sub PictureBox1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseDown
TextBox1.Text = "You clicked at" & e.X & "," & e.Y
End Sub
End Class
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/* Window application for Scroll Bars */
Public Class Form1
Private Sub HScrollBar1_Scroll(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ScrollEventArgs) Handles HScrollBar1.Scroll
TextBox1.Text = "H-Pos: " & e.NewValue
End Sub
Private Sub VScrollBar1_Scroll(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ScrollEventArgs) Handles VScrollBar1.Scroll
TextBox1.Text = "V-Pos: " & e.NewValue
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
HScrollBar1.Minimum = 10
HScrollBar1.Maximum = 100
HScrollBar1.Value = 20
End Sub
End Class
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Window program to create and display file
Imports System.IO
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim fs As New System.IO.FileStream("D:\Testfile.txt", FileMode.Create, FileAccess.Write)
Dim w As New StreamWriter(fs)
w.BaseStream.Seek(0, SeekOrigin.End)
w.WriteLine("This is a sample file")
w.WriteLine("Test Line")
w.Flush()
w.Close()
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim fs As New System.IO.FileStream("D:\Testfile.txt", FileMode.Open, FileAccess.Read)
Dim r As New StreamReader(fs)
r.BaseStream.Seek(0, SeekOrigin.Begin)
While r.Peek() > -1
TextBox1.Text &= r.ReadLine()
End While
r.Close()
End Sub
End Class
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Window program to create dictionary and copy file into that dictionary
Imports System.IO
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try
Directory.CreateDirectory(TextBox1.Text)
Catch ex As Exception
MessageBox.Show("Dirctroy not Created" & ex.ToString)
Exit Sub
End Try
MessageBox.Show("Dirctroy Created")
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
If OpenFileDialog1.ShowDialog <> DialogResult.Cancel Then
File.Copy(OpenFileDialog1.FileName, TextBox1.Text & "\" & OpenFileDialog1.FileName.Substring(OpenFileDialog1.FileName.LastIndexOf("\")))
' MessageBox.Show("" & OpenFileDialog1.FileName.Substring(OpenFileDialog1.FileName.LastIndexOf("\")))
End If
Catch ex As Exception
MessageBox.Show("Not Copied" & ex.ToString)
End Try
MessageBox.Show("File succesfully copied")
End Sub
End Class
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Window program to display Graphics shapes
Public Class Form1
Dim g As Graphics
Dim down As Point
Dim up As Point
Dim r As Rectangle
Dim ch As Char
Private Sub ToolStripLabel1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripLabel1.Click
ch = "R"
End Sub
Private Sub ToolStripLabel2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripLabel2.Click
ch = "E"
End Sub
Private Sub ToolStripLabel3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripLabel3.Click
ch = "L"
End Sub
Private Sub ToolStripLabel4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripLabel4.Click
ch = "B"
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
g = Me.CreateGraphics()
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End Sub
Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDown
down = New Point(e.X, e.Y)
End Sub
Private Sub Form1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseUp
up = New Point(e.X, e.Y)
r = New Rectangle(Math.Min(up.X, down.X), Math.Min(up.Y, down.Y), Math.Abs(up.X - down.X), Math.Abs(up.Y - down.Y))
Select Case ch
Case "R"
g.DrawRectangle(Pens.YellowGreen, r)
Case "E"
g.DrawEllipse(Pens.YellowGreen, r)
Case "L"
g.DrawLine(Pens.YellowGreen, up, down)
Case "B"
g.FillEllipse(Brushes.Blue, r)
End Select
End Sub
End Class
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/* ADO application for Select Query*/
Imports System.Data.OleDb
Public Class Form1
Dim cn As OleDbConnection
Dim cmd As OleDbCommand
Dim dr As OleDbDataReader
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try
cn = New OleDbConnection("Data Source=C:\Users\Raghura.B.Naik\Desktop\VB_ADO\EMP_2013.mdb; Provider=Microsoft.Jet.OLEDB.4.0")
cn.Open()
cmd = New OleDbCommand("select Ename,Job from Emp1", cn)
dr = cmd.ExecuteReader()
While (dr.Read())
TextBox2.Text = dr(0)
TextBox3.Text = dr(1)
End While
Catch ex As Exception
MessageBox.Show(ex.ToString)
End Try
dr.Close()
cn.Close()
End Sub
End Class
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/* ADO application for Insert Query*/
Imports System.Data.OleDbPublic Class Form1 Dim cn As OleDbConnection Dim cmd As OleDbCommandPrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Try cn = New OleDbConnection("Data Source=C:\Users\Raghura.B.Naik\Desktop\VB_ADO\EMP_2013.mdb; Provider=Microsoft.Jet.OLEDB.4.0") cmd = New OleDb.OleDbCommand("insert into Emp1 values(?,?,?,?)", cn) cmd.Parameters.Add(New OleDb.OleDbParameter("@Sno", CInt(TextBox1.Text.Trim))) cmd.Parameters.Add(New OleDb.OleDbParameter("@Sname", TextBox2.Text.Trim)) cmd.Parameters.Add(New OleDb.OleDbParameter("@Scollege", TextBox3.Text.Trim)) cmd.Parameters.Add(New OleDb.OleDbParameter("@Sno", CInt(TextBox4.Text.Trim))) cmd.Connection.Open() Dim n As Integer n = cmd.ExecuteNonQuery() If n = 1 Then MessageBox.Show("inserted successfully") Else MessageBox.Show("insertion failed") End If cmd.Connection.Close() Catch ex As OleDb.OleDbException MessageBox.Show(ex.ToString) End Try cn.Close() End SubEnd Class
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/* ADO application for Update Query*/
Imports System.Data.OleDbPublic Class Form1 Dim cn As OleDbConnection Dim cmd As OleDbCommand Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Try cn = New OleDbConnection("Data Source=C:\Users\Raghura.B.Naik\Desktop\VB_ADO\EMP_2013.mdb; Provider=Microsoft.Jet.OLEDB.4.0") cmd = New OleDb.OleDbCommand("update Emp1 set sal = sal + " & Val(TextBox1.Text), cn) cmd.Connection.Open()
Dim n As Integer n = cmd.ExecuteNonQuery() If n > 1 Then MessageBox.Show("Update successful") Else MessageBox.Show("Update failed") End If cmd.Connection.Close()
Catch ex As OleDb.OleDbException MessageBox.Show(ex.ToString) End Try cn.Close() End SubEnd Class
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/* ADO application for Delete Query*/
Imports System.Data.OleDbPublic Class Form1 Dim cn As OleDbConnection Dim cmd As OleDbCommand Dim dr As OleDbDataReader Dim i As Integer Dim str As String Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Trycn = New OleDbConnection("Data Source=C:\Users\Raghura.B.Naik\Desktop\VB_ADO\EMP_2013.mdb; Provider=Microsoft.Jet.OLEDB.4.0") cmd = New OleDb.OleDbCommand("delete from emp1 where Eno = " & Val(TextBox1.Text), cn) cmd.Connection.Open()
Dim n As Integer n = cmd.ExecuteNonQuery() If n = 1 Then MessageBox.Show("Deleted successfully") Else MessageBox.Show("Deletion failed") End If cmd.Connection.Close()
Catch ex As OleDb.OleDbException MessageBox.Show(ex.ToString) End Try cn.Close() End SubEnd Class
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