frmlogin.vb

Visual Basic管理信息系统开发 学生考试系统(源代码)

Option Strict Off
Option Explicit On
Friend Class frmLogin
	Inherits System.Windows.Forms.Form
#Region "Windows 窗体设计器生成的代码"
	Public Sub New()
		MyBase.New()
		If m_vb6FormDefInstance Is Nothing Then
			If m_InitializingDefInstance Then
				m_vb6FormDefInstance = Me
			Else
				Try 
					'对于启动窗体，所创建的第一个实例为默认实例。
					If System.Reflection.Assembly.GetExecutingAssembly.EntryPoint.DeclaringType Is Me.GetType Then
						m_vb6FormDefInstance = Me
					End If
				Catch
				End Try
			End If
		End If
		'此调用是 Windows 窗体设计器所必需的。
		InitializeComponent()
	End Sub
	'窗体重写处置，以清理组件列表。
	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
	'Windows 窗体设计器所必需的
	Private components As System.ComponentModel.IContainer
	Public ToolTip1 As System.Windows.Forms.ToolTip
	Public WithEvents cmdCancel As System.Windows.Forms.Button
	Public WithEvents cmdOK As System.Windows.Forms.Button
	Public WithEvents UTypes As System.Windows.Forms.ComboBox
	Public WithEvents txtPassword As System.Windows.Forms.TextBox
	Public WithEvents txtUserName As System.Windows.Forms.TextBox
	Public WithEvents _lblLabels_2 As System.Windows.Forms.Label
	Public WithEvents _lblLabels_1 As System.Windows.Forms.Label
	Public WithEvents _lblLabels_0 As System.Windows.Forms.Label
	Public WithEvents FrameLog As System.Windows.Forms.GroupBox
	Public WithEvents lblLabels As Microsoft.VisualBasic.Compatibility.VB6.LabelArray
	'注意: 以下过程是 Windows 窗体设计器所必需的
	'可以使用 Windows 窗体设计器来修改它。
	'不要使用代码编辑器修改它。
	<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
		Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(frmLogin))
		Me.components = New System.ComponentModel.Container()
		Me.ToolTip1 = New System.Windows.Forms.ToolTip(components)
		Me.ToolTip1.Active = True
		Me.cmdCancel = New System.Windows.Forms.Button
		Me.cmdOK = New System.Windows.Forms.Button
		Me.FrameLog = New System.Windows.Forms.GroupBox
		Me.UTypes = New System.Windows.Forms.ComboBox
		Me.txtPassword = New System.Windows.Forms.TextBox
		Me.txtUserName = New System.Windows.Forms.TextBox
		Me._lblLabels_2 = New System.Windows.Forms.Label
		Me._lblLabels_1 = New System.Windows.Forms.Label
		Me._lblLabels_0 = New System.Windows.Forms.Label
		Me.lblLabels = New Microsoft.VisualBasic.Compatibility.VB6.LabelArray(components)
		CType(Me.lblLabels, System.ComponentModel.ISupportInitialize).BeginInit()
		Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None
		Me.Text = "人员登录"
		Me.ClientSize = New System.Drawing.Size(345, 140)
		Me.Location = New System.Drawing.Point(186, 203)
		Me.ControlBox = False
		Me.MaximizeBox = False
		Me.MinimizeBox = False
		Me.ShowInTaskbar = False
		Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
		Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
		Me.BackColor = System.Drawing.SystemColors.Control
		Me.Enabled = True
		Me.KeyPreview = False
		Me.Cursor = System.Windows.Forms.Cursors.Default
		Me.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.HelpButton = False
		Me.WindowState = System.Windows.Forms.FormWindowState.Normal
		Me.Name = "frmLogin"
		Me.cmdCancel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.CancelButton = Me.cmdCancel
		Me.cmdCancel.Text = "取消"
		Me.cmdCancel.Size = New System.Drawing.Size(76, 26)
		Me.cmdCancel.Location = New System.Drawing.Point(256, 64)
		Me.cmdCancel.TabIndex = 6
		Me.cmdCancel.BackColor = System.Drawing.SystemColors.Control
		Me.cmdCancel.CausesValidation = True
		Me.cmdCancel.Enabled = True
		Me.cmdCancel.ForeColor = System.Drawing.SystemColors.ControlText
		Me.cmdCancel.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdCancel.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdCancel.TabStop = True
		Me.cmdCancel.Name = "cmdCancel"
		Me.cmdOK.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
		Me.cmdOK.Text = "确定"
		Me.AcceptButton = Me.cmdOK
		Me.cmdOK.Size = New System.Drawing.Size(76, 26)
		Me.cmdOK.Location = New System.Drawing.Point(256, 24)
		Me.cmdOK.TabIndex = 5
		Me.cmdOK.BackColor = System.Drawing.SystemColors.Control
		Me.cmdOK.CausesValidation = True
		Me.cmdOK.Enabled = True
		Me.cmdOK.ForeColor = System.Drawing.SystemColors.ControlText
		Me.cmdOK.Cursor = System.Windows.Forms.Cursors.Default
		Me.cmdOK.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.cmdOK.TabStop = True
		Me.cmdOK.Name = "cmdOK"
		Me.FrameLog.Size = New System.Drawing.Size(225, 121)
		Me.FrameLog.Location = New System.Drawing.Point(16, 8)
		Me.FrameLog.TabIndex = 0
		Me.FrameLog.BackColor = System.Drawing.SystemColors.Control
		Me.FrameLog.Enabled = True
		Me.FrameLog.ForeColor = System.Drawing.SystemColors.ControlText
		Me.FrameLog.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.FrameLog.Visible = True
		Me.FrameLog.Name = "FrameLog"
		Me.UTypes.Size = New System.Drawing.Size(97, 21)
		Me.UTypes.Location = New System.Drawing.Point(104, 80)
		Me.UTypes.Items.AddRange(New Object(){"学生", "教师", "管理人员"})
		Me.UTypes.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList
		Me.UTypes.TabIndex = 8
		Me.UTypes.BackColor = System.Drawing.SystemColors.Window
		Me.UTypes.CausesValidation = True
		Me.UTypes.Enabled = True
		Me.UTypes.ForeColor = System.Drawing.SystemColors.WindowText
		Me.UTypes.IntegralHeight = True
		Me.UTypes.Cursor = System.Windows.Forms.Cursors.Default
		Me.UTypes.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.UTypes.Sorted = False
		Me.UTypes.TabStop = True
		Me.UTypes.Visible = True
		Me.UTypes.Name = "UTypes"
		Me.txtPassword.AutoSize = False
		Me.txtPassword.Size = New System.Drawing.Size(115, 19)
		Me.txtPassword.IMEMode = System.Windows.Forms.ImeMode.Disable
		Me.txtPassword.Location = New System.Drawing.Point(80, 48)
		Me.txtPassword.PasswordChar = ChrW(42)
		Me.txtPassword.TabIndex = 4
		Me.txtPassword.AcceptsReturn = True
		Me.txtPassword.TextAlign = System.Windows.Forms.HorizontalAlignment.Left
		Me.txtPassword.BackColor = System.Drawing.SystemColors.Window
		Me.txtPassword.CausesValidation = True
		Me.txtPassword.Enabled = True
		Me.txtPassword.ForeColor = System.Drawing.SystemColors.WindowText
		Me.txtPassword.HideSelection = True
		Me.txtPassword.ReadOnly = False
		Me.txtPassword.Maxlength = 0
		Me.txtPassword.Cursor = System.Windows.Forms.Cursors.IBeam
		Me.txtPassword.MultiLine = False
		Me.txtPassword.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.txtPassword.ScrollBars = System.Windows.Forms.ScrollBars.None
		Me.txtPassword.TabStop = True
		Me.txtPassword.Visible = True
		Me.txtPassword.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
		Me.txtPassword.Name = "txtPassword"
		Me.txtUserName.AutoSize = False
		Me.txtUserName.Size = New System.Drawing.Size(115, 19)
		Me.txtUserName.Location = New System.Drawing.Point(80, 16)
		Me.txtUserName.TabIndex = 3
		Me.txtUserName.AcceptsReturn = True
		Me.txtUserName.TextAlign = System.Windows.Forms.HorizontalAlignment.Left
		Me.txtUserName.BackColor = System.Drawing.SystemColors.Window
		Me.txtUserName.CausesValidation = True
		Me.txtUserName.Enabled = True
		Me.txtUserName.ForeColor = System.Drawing.SystemColors.WindowText
		Me.txtUserName.HideSelection = True
		Me.txtUserName.ReadOnly = False
		Me.txtUserName.Maxlength = 0
		Me.txtUserName.Cursor = System.Windows.Forms.Cursors.IBeam
		Me.txtUserName.MultiLine = False
		Me.txtUserName.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me.txtUserName.ScrollBars = System.Windows.Forms.ScrollBars.None
		Me.txtUserName.TabStop = True
		Me.txtUserName.Visible = True
		Me.txtUserName.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
		Me.txtUserName.Name = "txtUserName"
		Me._lblLabels_2.Text = "人员类型"
		Me._lblLabels_2.Size = New System.Drawing.Size(72, 18)
		Me._lblLabels_2.Location = New System.Drawing.Point(24, 80)
		Me._lblLabels_2.TabIndex = 7
		Me._lblLabels_2.TextAlign = System.Drawing.ContentAlignment.TopLeft
		Me._lblLabels_2.BackColor = System.Drawing.SystemColors.Control
		Me._lblLabels_2.Enabled = True
		Me._lblLabels_2.ForeColor = System.Drawing.SystemColors.ControlText
		Me._lblLabels_2.Cursor = System.Windows.Forms.Cursors.Default
		Me._lblLabels_2.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me._lblLabels_2.UseMnemonic = True
		Me._lblLabels_2.Visible = True
		Me._lblLabels_2.AutoSize = False
		Me._lblLabels_2.BorderStyle = System.Windows.Forms.BorderStyle.None
		Me._lblLabels_2.Name = "_lblLabels_2"
		Me._lblLabels_1.Text = "口令"
		Me._lblLabels_1.Size = New System.Drawing.Size(48, 18)
		Me._lblLabels_1.Location = New System.Drawing.Point(24, 48)
		Me._lblLabels_1.TabIndex = 2
		Me._lblLabels_1.TextAlign = System.Drawing.ContentAlignment.TopLeft
		Me._lblLabels_1.BackColor = System.Drawing.SystemColors.Control
		Me._lblLabels_1.Enabled = True
		Me._lblLabels_1.ForeColor = System.Drawing.SystemColors.ControlText
		Me._lblLabels_1.Cursor = System.Windows.Forms.Cursors.Default
		Me._lblLabels_1.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me._lblLabels_1.UseMnemonic = True
		Me._lblLabels_1.Visible = True
		Me._lblLabels_1.AutoSize = False
		Me._lblLabels_1.BorderStyle = System.Windows.Forms.BorderStyle.None
		Me._lblLabels_1.Name = "_lblLabels_1"
		Me._lblLabels_0.Text = "姓名"
		Me._lblLabels_0.Size = New System.Drawing.Size(56, 18)
		Me._lblLabels_0.Location = New System.Drawing.Point(24, 16)
		Me._lblLabels_0.TabIndex = 1
		Me._lblLabels_0.TextAlign = System.Drawing.ContentAlignment.TopLeft
		Me._lblLabels_0.BackColor = System.Drawing.SystemColors.Control
		Me._lblLabels_0.Enabled = True
		Me._lblLabels_0.ForeColor = System.Drawing.SystemColors.ControlText
		Me._lblLabels_0.Cursor = System.Windows.Forms.Cursors.Default
		Me._lblLabels_0.RightToLeft = System.Windows.Forms.RightToLeft.No
		Me._lblLabels_0.UseMnemonic = True
		Me._lblLabels_0.Visible = True
		Me._lblLabels_0.AutoSize = False
		Me._lblLabels_0.BorderStyle = System.Windows.Forms.BorderStyle.None
		Me._lblLabels_0.Name = "_lblLabels_0"
		Me.Controls.Add(cmdCancel)
		Me.Controls.Add(cmdOK)
		Me.Controls.Add(FrameLog)
		Me.FrameLog.Controls.Add(UTypes)
		Me.FrameLog.Controls.Add(txtPassword)
		Me.FrameLog.Controls.Add(txtUserName)
		Me.FrameLog.Controls.Add(_lblLabels_2)
		Me.FrameLog.Controls.Add(_lblLabels_1)
		Me.FrameLog.Controls.Add(_lblLabels_0)
		Me.lblLabels.SetIndex(_lblLabels_2, CType(2, Short))
		Me.lblLabels.SetIndex(_lblLabels_1, CType(1, Short))
		Me.lblLabels.SetIndex(_lblLabels_0, CType(0, Short))
		CType(Me.lblLabels, System.ComponentModel.ISupportInitialize).EndInit()
	End Sub
#End Region 
#Region "升级支持"
	Private Shared m_vb6FormDefInstance As frmLogin
	Private Shared m_InitializingDefInstance As Boolean
	Public Shared Property DefInstance() As frmLogin
		Get
			If m_vb6FormDefInstance Is Nothing OrElse m_vb6FormDefInstance.IsDisposed Then
				m_InitializingDefInstance = True
				m_vb6FormDefInstance = New frmLogin()
				m_InitializingDefInstance = False
			End If
			DefInstance = m_vb6FormDefInstance
		End Get
		Set
			m_vb6FormDefInstance = Value
		End Set
	End Property
#End Region 
	
	
	Private Sub cmdCancel_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles cmdCancel.Click '单击“取消”按钮后退出
		Me.Close()
	End Sub
	
	Private Sub cmdOK_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles cmdOK.Click '单击“确定”按钮后进行登录
		If txtUserName.Text = "" Then '如果输入项为空，则提示重新输入
			MsgBox("请输入姓名", MsgBoxStyle.Critical, "登录失败")
			txtUserName.Focus()
			Exit Sub
		End If
		If txtPassword.Text = "" Then
			MsgBox("请输入口令", MsgBoxStyle.Critical, "登录失败")
			txtPassword.Focus()
			Exit Sub
		End If
		
		Select Case UTypes.SelectedIndex '根据用户在组合框中不同的选择来登录不同的用户
			Case 0
				TestUser.Log(txtUserName.Text, txtPassword.Text, MainModule.LogType.student)
			Case 1
				TestUser.Log(txtUserName.Text, txtPassword.Text, MainModule.LogType.teacher)
			Case 2
				TestUser.Log(txtUserName.Text, txtPassword.Text, MainModule.LogType.administrator)
		End Select
		
		If Not TestUser.LogFail Then '如果登录成功则从该窗体中退出
			Me.Close()
		Else
			MsgBox("无法登录, 请重试!", MsgBoxStyle.Critical, "用户登录")
			txtUserName.Focus()
			System.Windows.Forms.SendKeys.Send("{Home}+{End}")
		End If
	End Sub
	
	Private Sub frmLogin_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load '在窗体加载时组合框中第1个选项
		UTypes.SelectedIndex = 0
	End Sub
End Class