VB.Net/GUI/MessageBox

Материал из VB Эксперт
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MessageBox: Abort, Retry and Ignore

Imports System
Imports System.Collections
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Resources
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.IO
Imports System.Drawing.Printing

Public Class MainClass
    Shared Sub Main()
        Dim intResult As DialogResult
        "Get the results of the button clicked
        intResult = MessageBox.Show("The A drive is not ready." & _
            ControlChars.CrLf & ControlChars.CrLf & _
            "Please insert a diskette into the drive.", "Device Not Ready", _
            MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Error, _
            MessageBoxDefaultButton.Button2)
        "Process the results of the button clicked
        Select Case intResult
            Case DialogResult.Abort
                "Do abort processing here...
                System.Console.WriteLine("Abort Clicked")
            Case DialogResult.Retry
                "Do retry processing here...
                System.Console.WriteLine("Retry Clicked")
            Case DialogResult.Ignore
                "Do ignore processing here...
                System.Console.WriteLine("Ignore Clicked")
        End Select
    End Sub
End Class


Message Box: Abort Retry Ignore

Imports System
Imports System.Drawing
Imports System.Data
Imports System.IO
Imports System.Collections
Imports System.Windows.Forms
Imports System.Drawing.Printing
Public Class MainClass
    Shared Sub Main()
        Dim intResult As Integer
        intResult = MessageBox.Show("The A drive is not ready." & _
           vbCrLf & vbCrLf & _
           "Please insert a diskette into the drive.", _
           "Device Not Ready", _
           MessageBoxButtons.AbortRetryIgnore, _
           MessageBoxIcon.Error, _
           MessageBoxDefaultButton.Button2)
        If intResult = DialogResult.Abort Then
            " Do abort processing here...
            Console.WriteLine( "Abort Clicked")
        ElseIf intResult = DialogResult.Retry Then
            " Do retry processing here...
            Console.WriteLine("Retry Clicked")
        Else "It has to be ignore
            " Do ignore processing here...
            Console.WriteLine("Ignore Clicked")
        End If
    End Sub
End Class


Message box Demo

Imports System
Imports System.Windows.Forms
Class MyFirstForm
    Inherits Form
    Private WithEvents mybutton As Button
    Public Sub New()
        Me.Text = "Hello, WinForms!"
        mybutton = New Button()
        mybutton.Text = "Click Me!"
        Me.Controls.Add(mybutton)
    End Sub
    Public Sub mybutton_Click(sender As Object, e As EventArgs) Handles mybutton.Click
        MessageBox.Show("Message")
    End Sub
    Shared Sub Main()
        Dim myform As Form = New MyFirstForm()
        Application.Run(myform)
    End Sub
End Class


MessageBox: OK or Cancel

Imports System
Imports System.Collections
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Resources
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.IO
Imports System.Drawing.Printing

Public Class MainClass
    Shared Sub Main()
        
        If MessageBox.Show("Info Text.","Title", MessageBoxButtons.OKCancel, _
            Nothing, MessageBoxDefaultButton.Button1) = DialogResult.OK Then
            System.Console.WriteLine("OK Clicked")
        Else
            System.Console.WriteLine("Cancel Clicked")
        End If
    End Sub
End Class