form3.vb

VB与ACCESS数据库制作的的注册登陆查询系统

Public Class Form3
    Inherits System.Windows.Forms.Form

#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 Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents OleDbDataAdapter1 As System.Data.OleDb.OleDbDataAdapter
    Friend WithEvents OleDbSelectCommand1 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbInsertCommand1 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbUpdateCommand1 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbDeleteCommand1 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbConnection1 As System.Data.OleDb.OleDbConnection
    Friend WithEvents DataSet11 As WindowsApplication1.DataSet1
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.OleDbDataAdapter1 = New System.Data.OleDb.OleDbDataAdapter
        Me.OleDbSelectCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbInsertCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbUpdateCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbDeleteCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbConnection1 = New System.Data.OleDb.OleDbConnection
        Me.DataSet11 = New WindowsApplication1.DataSet1
        CType(Me.DataSet11, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(16, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(96, 48)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "用户名"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(8, 88)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(112, 56)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "密码"
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(8, 160)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(112, 64)
        Me.Label3.TabIndex = 2
        Me.Label3.Text = "确认密码"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(184, 304)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(104, 64)
        Me.Button1.TabIndex = 3
        Me.Button1.Text = "确定注册"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(152, 24)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(144, 21)
        Me.TextBox1.TabIndex = 4
        Me.TextBox1.Text = ""
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(144, 88)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox2.Size = New System.Drawing.Size(144, 21)
        Me.TextBox2.TabIndex = 5
        Me.TextBox2.Text = ""
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(144, 160)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox3.Size = New System.Drawing.Size(168, 21)
        Me.TextBox3.TabIndex = 6
        Me.TextBox3.Text = ""
        '
        'OleDbDataAdapter1
        '
        Me.OleDbDataAdapter1.DeleteCommand = Me.OleDbDeleteCommand1
        Me.OleDbDataAdapter1.InsertCommand = Me.OleDbInsertCommand1
        Me.OleDbDataAdapter1.SelectCommand = Me.OleDbSelectCommand1
        Me.OleDbDataAdapter1.TableMappings.AddRange(New System.Data.Common.DataTableMapping() {New System.Data.Common.DataTableMapping("Table", "yonghu", New System.Data.Common.DataColumnMapping() {New System.Data.Common.DataColumnMapping("name", "name"), New System.Data.Common.DataColumnMapping("pass", "pass")})})
        Me.OleDbDataAdapter1.UpdateCommand = Me.OleDbUpdateCommand1
        '
        'OleDbSelectCommand1
        '
        Me.OleDbSelectCommand1.CommandText = "SELECT name, pass FROM yonghu"
        Me.OleDbSelectCommand1.Connection = Me.OleDbConnection1
        '
        'OleDbInsertCommand1
        '
        Me.OleDbInsertCommand1.CommandText = "INSERT INTO yonghu(name, pass) VALUES (?, ?)"
        Me.OleDbInsertCommand1.Connection = Me.OleDbConnection1
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("name", System.Data.OleDb.OleDbType.VarWChar, 50, "name"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("pass", System.Data.OleDb.OleDbType.VarWChar, 50, "pass"))
        '
        'OleDbUpdateCommand1
        '
        Me.OleDbUpdateCommand1.CommandText = "UPDATE yonghu SET name = ?, pass = ? WHERE (name = ?) AND (pass = ? OR ? IS NULL " & _
        "AND pass IS NULL)"
        Me.OleDbUpdateCommand1.Connection = Me.OleDbConnection1
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("name", System.Data.OleDb.OleDbType.VarWChar, 50, "name"))
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("pass", System.Data.OleDb.OleDbType.VarWChar, 50, "pass"))
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("Original_name", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "name", System.Data.DataRowVersion.Original, Nothing))
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("Original_pass", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "pass", System.Data.DataRowVersion.Original, Nothing))
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("Original_pass1", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "pass", System.Data.DataRowVersion.Original, Nothing))
        '
        'OleDbDeleteCommand1
        '
        Me.OleDbDeleteCommand1.CommandText = "DELETE FROM yonghu WHERE (name = ?) AND (pass = ? OR ? IS NULL AND pass IS NULL)"
        Me.OleDbDeleteCommand1.Connection = Me.OleDbConnection1
        Me.OleDbDeleteCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("Original_name", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "name", System.Data.DataRowVersion.Original, Nothing))
        Me.OleDbDeleteCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("Original_pass", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "pass", System.Data.DataRowVersion.Original, Nothing))
        Me.OleDbDeleteCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("Original_pass1", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "pass", System.Data.DataRowVersion.Original, Nothing))
        '
        'OleDbConnection1
        '
        Me.OleDbConnection1.ConnectionString = "Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Registry Path=;Jet OLEDB:Database L" & _
        "ocking Mode=1;Data Source=""D:\yonghu.mdb"";Jet OLEDB:Engine Type=5;Provider=""Micr" & _
        "osoft.Jet.OLEDB.4.0"";Jet OLEDB:System database=;Jet OLEDB:SFP=False;persist secu" & _
        "rity info=False;Extended Properties=;Mode=Share Deny None;Jet OLEDB:Encrypt Data" & _
        "base=False;Jet OLEDB:Create System Database=False;Jet OLEDB:Don't Copy Locale on" & _
        " Compact=False;Jet OLEDB:Compact Without Replica Repair=False;User ID=Admin;Jet " & _
        "OLEDB:Global Bulk Transactions=1"
        '
        'DataSet11
        '
        Me.DataSet11.DataSetName = "DataSet1"
        Me.DataSet11.Locale = New System.Globalization.CultureInfo("zh-CN")
        '
        'Form3
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(456, 405)
        Me.Controls.Add(Me.TextBox3)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form3"
        Me.Text = "Form3"
        CType(Me.DataSet11, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If TextBox1.Text = "" Then
            MessageBox.Show("用户名不能为空")
            Exit Sub
        End If
        If TextBox2.Text = "" And TextBox3.Text = "" Then
            MessageBox.Show("密码不能为空")
            Exit Sub
        End If
        If TextBox2.Text <> TextBox3.Text Then
            MessageBox.Show("输入的密码不同")
            Exit Sub

        End If
        Dim s1 As String = "select * from yonghu"
        Dim cmd1 As New OleDb.OleDbCommand(s1, OleDbConnection1)
        Dim dr As OleDb.OleDbDataReader
        OleDbConnection1.Open()
        dr = cmd1.ExecuteReader
        While dr.Read
            If dr.GetValue(0) = TextBox1.Text Then
                MessageBox.Show("该用户已经注册！")
                OleDbConnection1.Close()
                Exit Sub
            End If
        End While
        dr.Close()
        '    OleDbConnection1.close()
        Dim s As String = "insert into yonghu(name,pass) values('" + TextBox1.Text + "','" + TextBox2.Text + "')"
        Dim cmd As New OleDb.OleDbCommand(s, OleDbConnection1)
        Try
            'OleDbConnection1.Open()
            cmd.ExecuteNonQuery()
            MessageBox.Show("注册成功!")

            Dim f1 As New Form1
            Me.Hide()
            f1.Show()
        Catch ex As Exception
            MessageBox.Show(ex.ToString)
        End Try
        OleDbConnection1.Close()
    End Sub




End Class