VB.Net Tutorial/GUI/Password Field — различия между версиями

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Текущая версия на 15:57, 26 мая 2010

Get input from a password field

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class PasswordFieldMatch

  public Shared Sub Main
       Application.Run(New Form1)
  End Sub

End class

Public Class Form1

   Inherits System.Windows.Forms.Form
   Public Sub New()
       MyBase.New()
       InitializeComponent()
   End Sub
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       End If
       MyBase.Dispose(disposing)
   End Sub
   Private components As System.ruponentModel.IContainer
   Friend WithEvents Label1 As System.Windows.Forms.Label
   Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
   Friend WithEvents Button1 As System.Windows.Forms.Button
   Friend WithEvents Button2 As System.Windows.Forms.Button
   Friend WithEvents Button3 As System.Windows.Forms.Button
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       Me.Label1 = New System.Windows.Forms.Label
       Me.TextBox1 = New System.Windows.Forms.TextBox
       Me.Button1 = New System.Windows.Forms.Button
       Me.Button2 = New System.Windows.Forms.Button
       Me.Button3 = New System.Windows.Forms.Button
       Me.SuspendLayout()
       "
       "Label1
       "
       Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", 15.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
       Me.Label1.Location = New System.Drawing.Point(16, 16)
       Me.Label1.Name = "Label1"
       Me.Label1.Size = New System.Drawing.Size(152, 32)
       Me.Label1.TabIndex = 0
       Me.Label1.Text = "Password"
       "
       "TextBox1
       "
       Me.TextBox1.Location = New System.Drawing.Point(40, 64)
       Me.TextBox1.Name = "TextBox1"
       Me.TextBox1.PasswordChar = Microsoft.VisualBasic.ChrW(42)
       Me.TextBox1.Size = New System.Drawing.Size(160, 20)
       Me.TextBox1.TabIndex = 1
       Me.TextBox1.Text = ""
       "
       "Button1
       "
       Me.Button1.Location = New System.Drawing.Point(80, 96)
       Me.Button1.Name = "Button1"
       Me.Button1.Size = New System.Drawing.Size(80, 24)
       Me.Button1.TabIndex = 2
       Me.Button1.Text = "Input"
       "
       "Button2
       "
       Me.Button2.Location = New System.Drawing.Point(80, 136)
       Me.Button2.Name = "Button2"
       Me.Button2.Size = New System.Drawing.Size(80, 24)
       Me.Button2.TabIndex = 3
       Me.Button2.Text = "Check"
       "
       "Button3
       "
       Me.Button3.Location = New System.Drawing.Point(80, 176)
       Me.Button3.Name = "Button3"
       Me.Button3.Size = New System.Drawing.Size(80, 24)
       Me.Button3.TabIndex = 4
       Me.Button3.Text = "Exit"
       "
       "Form1
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(256, 222)
       Me.Controls.Add(Me.Button3)
       Me.Controls.Add(Me.Button2)
       Me.Controls.Add(Me.Button1)
       Me.Controls.Add(Me.TextBox1)
       Me.Controls.Add(Me.Label1)
       Me.ResumeLayout(False)
   End Sub
   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       TextBox1.Text = ""
       TextBox1.Focus()
   End Sub
   Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
       Dim answer As Object
       Dim caption As String
       Dim pwd As String
       pwd = "Visual Basic"
       caption = "Password"
       If TextBox1.Text = pwd Then
           answer = MsgBox("Match", 1, caption)
       Else
           answer = MsgBox("Does not Match", 1, caption)
       End If
   End Sub
   Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
       End
   End Sub

End Class</source>

Using a textbox, label and button to display the hidden text in a password box.

<source lang="vbnet">Imports System.Windows.Forms public class GetTextPasswordField

  public Shared Sub Main
       Application.Run(New FrmButtonTest)
  End Sub

End class

Public Class FrmButtonTest

  Inherits System.Windows.Forms.Form
  1. Region " Windows Form Designer generated code "
  Public Sub New()
     MyBase.New()
     "This call is required by the Windows Form Designer.
     InitializeComponent()
     "Add any initialization after the InitializeComponent() call
  End Sub
  "Form overrides dispose to clean up the component list.
  Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
     If disposing Then
        If Not (components Is Nothing) Then
           components.Dispose()
        End If
     End If
     MyBase.Dispose(disposing)
  End Sub
  Friend WithEvents lblOutput As System.Windows.Forms.Label
  Friend WithEvents txtInput As System.Windows.Forms.TextBox
  Friend WithEvents cmdShow As System.Windows.Forms.Button
  "Required by the Windows Form Designer
  Private components As System.ruponentModel.Container
  "NOTE: The following procedure is required by the Windows Form Designer
  "It can be modified using the Windows Form Designer.  
  "Do not modify it using the code editor.
  <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
     Me.cmdShow = New System.Windows.Forms.Button()
     Me.txtInput = New System.Windows.Forms.TextBox()
     Me.lblOutput = New System.Windows.Forms.Label()
     Me.SuspendLayout()
     "
     "cmdShow
     "
     Me.cmdShow.Font = New System.Drawing.Font("Microsoft Sans Serif", 11.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
     Me.cmdShow.Location = New System.Drawing.Point(88, 88)
     Me.cmdShow.Name = "cmdShow"
     Me.cmdShow.Size = New System.Drawing.Size(96, 40)
     Me.cmdShow.TabIndex = 2
     Me.cmdShow.Text = "Show Me"
     "
     "txtInput
     "
     Me.txtInput.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
     Me.txtInput.Location = New System.Drawing.Point(16, 16)
     Me.txtInput.Name = "txtInput"
     Me.txtInput.PasswordChar = Microsoft.VisualBasic.ChrW(42)
     Me.txtInput.Size = New System.Drawing.Size(232, 22)
     Me.txtInput.TabIndex = 0
     Me.txtInput.Text = ""
     "
     "lblOutput
     "
     Me.lblOutput.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
     Me.lblOutput.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
     Me.lblOutput.Location = New System.Drawing.Point(16, 56)
     Me.lblOutput.Name = "lblOutput"
     Me.lblOutput.Size = New System.Drawing.Size(232, 23)
     Me.lblOutput.TabIndex = 1
     "
     "FrmButtonTest
     "
     Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
     Me.ClientSize = New System.Drawing.Size(264, 141)
     Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.cmdShow, Me.lblOutput, Me.txtInput})
     Me.Name = "FrmButtonTest"
     Me.Text = "LabelTextBoxButtonExample"
     Me.ResumeLayout(False)
  End Sub
  1. End Region
  Private Sub cmdShow_Click(ByVal sender As System.Object, _
     ByVal e As System.EventArgs) Handles cmdShow.Click
     lblOutput.Text = txtInput.Text
  End Sub

End Class</source>