cla 245526 gui

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

VB application to cut and copy using button event

Public Class Form1

Dim NW As New Form2


TextBox2.Text = TextBox1.Text

End Sub


TextBox2.Text = TextBox1.Text

TextBox1.Text = “ “

End Sub

End Class

VB application to create button at runtime

Public Class Form1

Dim WithEvents Button2 As Button




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






Button3.BackColor = Color.Red



End If






Button4.BackColor = Color.Green



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



End If



End If

End Sub

End Class

/* Window application for Message Box */

Public Class Form1

Dim r As Integer


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

VB application to communicate with two different forms

‘form-1 creation

Public Class Form1

Dim NW As New Form2


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

VB application to illustrate check box with button event

Public Class Form1


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


ElseIf (CheckBox2.Checked = True And CheckBox3.Checked = True) Then


ElseIf (CheckBox1.Checked = True) Then

TextBox1.Text = "You check mark_1 is checked"





End If

End Sub

End Class

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


TextBox1.Text = "You are Female Student"

End Sub


TextBox2.Text = "I-Year Student"

End Sub


TextBox2.Text = "II-Year Student"

End Sub


TextBox2.Text = "III-Year Student"

End Sub


TextBox2.Text = "IV-Year Student"

End Sub End Class

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


ComboBox1.Items.Clear()

End Sub

End Class

VB application to illustrate List Box

Public Class Form1


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

VB application to illustrate Checked List Box

Public Class Form1


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


For Ind = 0 To CheckedListBox1.Items.Count - 1

CheckedListBox1.SetItemChecked(Ind, True)

Next

End Sub



If CheckedListBox1.GetItemChecked(Ind) = True Then

TextBox1.Text &= CheckedListBox1.Items(Ind)

End If

Next

End Sub



CheckedListBox1.SetItemChecked(Ind, False)

Next

End Sub

End Class

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


'DateTimePicker1.Format = DateTimePickerFormat.Custom

'DateTimePicker1.CustomFormat = "MMMM dd yyyy hh:mm:ss tt"

End Sub

End Class

/* Window application for Picture box */

Public Class Form1


If (OpenFileDialog1.ShowDialog() <> DialogResult.Cancel) Then

PictureBox1.Image = Image.FromFile(OpenFileDialog1.FileName)

End If

End Sub


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

/* 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


HScrollBar1.Minimum = 10

HScrollBar1.Maximum = 100

HScrollBar1.Value = 20

End Sub

End Class

Window program to create and display file

Imports System.IO

Public Class Form1


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


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

Window program to create dictionary and copy file into that dictionary

Imports System.IO

Public Class Form1


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


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


MessageBox.Show("Not Copied" & ex.ToString)

End Try

MessageBox.Show("File succesfully copied")

End Sub

End Class

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


ch = "E"

End Sub


ch = "L"

End Sub


ch = "B"

End Sub


g = Me.CreateGraphics()

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

/* ADO application for Select Query*/

Imports System.Data.OleDb

Public Class Form1

Dim cn As OleDbConnection

Dim cmd As OleDbCommand

Dim dr As OleDbDataReader


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


MessageBox.Show(ex.ToString)

End Try

dr.Close()

cn.Close()

End Sub

End Class

/* 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

/* 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

/* 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

cla 245526 gui

Documents

end sub private sub

button private sub button1

new button button2

new button button3

new button button4

text end sub private

text textbox1

eventargs handles button1