login.vb

一个基于SQL架构的管理系统

Imports System
Imports System.Data
Imports System.Data.SqlClient

Public Class Form1
    Inherits System.Windows.Forms.Form
    'Dim frm1 As New Form1
    Dim frm As New Form2

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写 dispose 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

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox
    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents PictureBox2 As System.Windows.Forms.PictureBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1))
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Label1 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Label2 = New System.Windows.Forms.Label
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.Button3 = New System.Windows.Forms.Button
        Me.Label4 = New System.Windows.Forms.Label
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.PictureBox2 = New System.Windows.Forms.PictureBox
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(56, 272)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 4
        Me.Button1.Text = "登陆"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(144, 272)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 5
        Me.Button2.Text = "重填"
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(96, 80)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(64, 23)
        Me.Label1.TabIndex = 3
        Me.Label1.Text = "用户名"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(184, 80)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.TabIndex = 1
        Me.TextBox1.Text = ""
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(96, 120)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(56, 23)
        Me.Label2.TabIndex = 5
        Me.Label2.Text = "密码"
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(184, 120)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox2.TabIndex = 2
        Me.TextBox2.Text = ""
        '
        'Label3
        '
        Me.Label3.Font = New System.Drawing.Font("楷体_GB2312", 15.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label3.Location = New System.Drawing.Point(56, 32)
        Me.Label3.Name = "Label3"
        Me.Label3.RightToLeft = System.Windows.Forms.RightToLeft.No
        Me.Label3.Size = New System.Drawing.Size(240, 23)
        Me.Label3.TabIndex = 7
        Me.Label3.Text = "安徽建筑工业学院"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(240, 272)
        Me.Button3.Name = "Button3"
        Me.Button3.TabIndex = 6
        Me.Button3.Text = "退出"
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(96, 160)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(64, 23)
        Me.Label4.TabIndex = 9
        Me.Label4.Text = "用户权限"
        '
        'ComboBox1
        '
        Me.ComboBox1.Items.AddRange(New Object() {"admin", "student", "teacher"})
        Me.ComboBox1.Location = New System.Drawing.Point(184, 160)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(104, 20)
        Me.ComboBox1.TabIndex = 3
        '
        'PictureBox1
        '
        Me.PictureBox1.Image = CType(resources.GetObject("PictureBox1.Image"), System.Drawing.Image)
        Me.PictureBox1.Location = New System.Drawing.Point(56, 80)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(24, 24)
        Me.PictureBox1.TabIndex = 10
        Me.PictureBox1.TabStop = False
        '
        'PictureBox2
        '
        Me.PictureBox2.Image = CType(resources.GetObject("PictureBox2.Image"), System.Drawing.Image)
        Me.PictureBox2.Location = New System.Drawing.Point(56, 160)
        Me.PictureBox2.Name = "PictureBox2"
        Me.PictureBox2.Size = New System.Drawing.Size(24, 24)
        Me.PictureBox2.TabIndex = 11
        Me.PictureBox2.TabStop = False
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.SystemColors.Info
        Me.ClientSize = New System.Drawing.Size(360, 341)
        Me.Controls.Add(Me.PictureBox2)
        Me.Controls.Add(Me.PictureBox1)
        Me.Controls.Add(Me.ComboBox1)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.ForeColor = System.Drawing.Color.Blue
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "学生信息管理系统"
        Me.ResumeLayout(False)

    End Sub

#End Region

    ' Public txb1 As String

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        'Dim frm2 As New Form2
        'Dim frm1 As New Form1
        ' frm1.Visible = False

        'frm2.Show()
        checkFormat()



    End Sub
    Sub checkFormat()
        If TextBox1.Text = "" Or TextBox2.Text = "" Then
            MsgBox("用户名和密码不能为空")
        ElseIf ComboBox1.Text = "" Then
            MsgBox("请选择登陆用户权限")
        Else
            checkLoginName()
        End If
    End Sub
    Sub checkLoginName()
        'Dim radiobtn As String   
        Dim str As String
        'Dim frmName As String = "欢迎您"
        str = "Data Source=localhost;Initial Catalog = Student;integrated Security=true"
        Dim con As New SqlConnection(str)
        con.Open()
        Dim sql As String = "select * from user_Info where user_ID='" & TextBox1.Text.ToString().Trim() & "' and user_PWD='" & TextBox2.Text.ToString().Trim() & " ' and user_Des='" & ComboBox1.Text.ToString.Trim() & "' "
        'and user_Des='" & sMenuText & "'
        Dim cmd As New SqlCommand(sql, con)
        Dim reader As SqlDataReader
        reader = cmd.ExecuteReader
        
        If reader.Read() = True Then
            Me.Hide()
            frm.Label1.Text = Me.ComboBox1.Text.ToString.Trim

            'txb1 = ComboBox1.Text.ToString.Trim()
            frm.Show()
            'frm1.Close()

            frm.Text = "安徽建筑工业学院欢迎您---" & TextBox1.Text & "--" & ComboBox1.Text

        Else
            MsgBox("登陆失败，请检查你用户名，密码，以及权限是否正确")
        End If

    End Sub
    ' Sub checkLoginName()
    'Dim mySQL As String
    'Dim form2 As New Form2
    'Dim radiobutton As New RadioButton

    'Dim iCount As Integer

    ' mySQL = "select count(*) from login where " _
    ' & " yhm='" & TextBox1.Text & " ' " _
    ' & " and password='" & TextBox2.Text & "'" & " and sf='" & RadioButton.Text & "'"
    ' cmd.CommandText = mySQL


    ' dc1.Open()

    ' iCount = cmd.ExecuteScalar()

    'dc1.Close()
    ' If iCount = 1 Then
    ' form2.Show()
    ' Me.Hide()

    'MsgBox("成功登录！", MsgBoxStyle.Information)
    'Me.Close()
    ' Else
    ' MsgBox("用户名或密码错误！", MsgBoxStyle.Exclamation)
    '  TextBox1.Focus()
    ' TextBox1.SelectAll()
    'End If
    ' End Sub
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        Me.Close()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click


        TextBox1.Text = ""
        TextBox2.Text = ""



    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ' Timer1.Enabled = True
        TextBox1.Focus()
    End Sub

 
End Class