form1.vb

VB与ACCESS数据库制作的的注册登陆查询系统

Imports System.Data.SqlClient
Public Class Form1
    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 TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents SqlDataAdapter1 As System.Data.SqlClient.SqlDataAdapter
    Friend WithEvents SqlSelectCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlInsertCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlUpdateCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlDeleteCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlConnection1 As System.Data.SqlClient.SqlConnection
    Friend WithEvents DataSet11 As WindowsApplication2.DataSet1
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents TextBox4 As System.Windows.Forms.TextBox
    Friend WithEvents Button2 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.SqlDataAdapter1 = New System.Data.SqlClient.SqlDataAdapter
        Me.SqlDeleteCommand1 = New System.Data.SqlClient.SqlCommand
        Me.SqlConnection1 = New System.Data.SqlClient.SqlConnection
        Me.SqlInsertCommand1 = New System.Data.SqlClient.SqlCommand
        Me.SqlSelectCommand1 = New System.Data.SqlClient.SqlCommand
        Me.SqlUpdateCommand1 = New System.Data.SqlClient.SqlCommand
        Me.DataSet11 = New WindowsApplication2.DataSet1
        Me.Label3 = New System.Windows.Forms.Label
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.TextBox4 = New System.Windows.Forms.TextBox
        Me.Button2 = New System.Windows.Forms.Button
        CType(Me.DataSet11, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("宋体", 18.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label1.ForeColor = System.Drawing.Color.Red
        Me.Label1.Location = New System.Drawing.Point(16, 16)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(72, 32)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "用户名"
        '
        'Label2
        '
        Me.Label2.Font = New System.Drawing.Font("宋体", 18.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label2.ForeColor = System.Drawing.Color.Red
        Me.Label2.Location = New System.Drawing.Point(16, 72)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(80, 24)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "密码"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(128, 16)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(144, 21)
        Me.TextBox1.TabIndex = 2
        Me.TextBox1.Text = ""
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(128, 72)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(144, 21)
        Me.TextBox2.TabIndex = 3
        Me.TextBox2.Text = ""
        '
        'Button1
        '
        Me.Button1.ForeColor = System.Drawing.Color.Red
        Me.Button1.Location = New System.Drawing.Point(224, 240)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(104, 56)
        Me.Button1.TabIndex = 4
        Me.Button1.Text = "注册"
        '
        'SqlDataAdapter1
        '
        Me.SqlDataAdapter1.DeleteCommand = Me.SqlDeleteCommand1
        Me.SqlDataAdapter1.InsertCommand = Me.SqlInsertCommand1
        Me.SqlDataAdapter1.SelectCommand = Me.SqlSelectCommand1
        Me.SqlDataAdapter1.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.SqlDataAdapter1.UpdateCommand = Me.SqlUpdateCommand1
        '
        'SqlDeleteCommand1
        '
        Me.SqlDeleteCommand1.CommandText = "DELETE FROM yonghu WHERE (name = @Original_name) AND (pass = @Original_pass)"
        Me.SqlDeleteCommand1.Connection = Me.SqlConnection1
        Me.SqlDeleteCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Original_name", System.Data.SqlDbType.VarChar, 10, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "name", System.Data.DataRowVersion.Original, Nothing))
        Me.SqlDeleteCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Original_pass", System.Data.SqlDbType.VarChar, 10, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "pass", System.Data.DataRowVersion.Original, Nothing))
        '
        'SqlConnection1
        '
        Me.SqlConnection1.ConnectionString = "workstation id=LX241;packet size=4096;integrated security=SSPI;initial catalog=06" & _
        "3441;persist security info=False"
        '
        'SqlInsertCommand1
        '
        Me.SqlInsertCommand1.CommandText = "INSERT INTO yonghu(name, pass) VALUES (@name, @pass); SELECT name, pass FROM yong" & _
        "hu WHERE (name = @name)"
        Me.SqlInsertCommand1.Connection = Me.SqlConnection1
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@name", System.Data.SqlDbType.VarChar, 10, "name"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@pass", System.Data.SqlDbType.VarChar, 10, "pass"))
        '
        'SqlSelectCommand1
        '
        Me.SqlSelectCommand1.CommandText = "SELECT name, pass FROM yonghu"
        Me.SqlSelectCommand1.Connection = Me.SqlConnection1
        '
        'SqlUpdateCommand1
        '
        Me.SqlUpdateCommand1.CommandText = "UPDATE yonghu SET name = @name, pass = @pass WHERE (name = @Original_name) AND (p" & _
        "ass = @Original_pass); SELECT name, pass FROM yonghu WHERE (name = @name)"
        Me.SqlUpdateCommand1.Connection = Me.SqlConnection1
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@name", System.Data.SqlDbType.VarChar, 10, "name"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@pass", System.Data.SqlDbType.VarChar, 10, "pass"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Original_name", System.Data.SqlDbType.VarChar, 10, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "name", System.Data.DataRowVersion.Original, Nothing))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Original_pass", System.Data.SqlDbType.VarChar, 10, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "pass", System.Data.DataRowVersion.Original, Nothing))
        '
        'DataSet11
        '
        Me.DataSet11.DataSetName = "DataSet1"
        Me.DataSet11.Locale = New System.Globalization.CultureInfo("zh-CN")
        '
        'Label3
        '
        Me.Label3.Font = New System.Drawing.Font("宋体", 18.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label3.ForeColor = System.Drawing.Color.Red
        Me.Label3.Location = New System.Drawing.Point(8, 128)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(72, 32)
        Me.Label3.TabIndex = 5
        Me.Label3.Text = "EMAIL"
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(128, 128)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.Size = New System.Drawing.Size(144, 21)
        Me.TextBox3.TabIndex = 6
        Me.TextBox3.Text = ""
        '
        'Label4
        '
        Me.Label4.Font = New System.Drawing.Font("宋体", 15.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label4.ForeColor = System.Drawing.Color.Red
        Me.Label4.Location = New System.Drawing.Point(8, 184)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(80, 32)
        Me.Label4.TabIndex = 7
        Me.Label4.Text = "adress"
        '
        'TextBox4
        '
        Me.TextBox4.Location = New System.Drawing.Point(128, 184)
        Me.TextBox4.Name = "TextBox4"
        Me.TextBox4.Size = New System.Drawing.Size(144, 21)
        Me.TextBox4.TabIndex = 8
        Me.TextBox4.Text = ""
        '
        'Button2
        '
        Me.Button2.ForeColor = System.Drawing.Color.Red
        Me.Button2.Location = New System.Drawing.Point(40, 240)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(96, 56)
        Me.Button2.TabIndex = 9
        Me.Button2.Text = "登陆"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.Color.Violet
        Me.ClientSize = New System.Drawing.Size(384, 317)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.TextBox4)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.TextBox3)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "登陆注册"
        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 Trim(TextBox1.Text) = "" Then
            MessageBox.Show("用户不能为空")
            Exit Sub
        End If
        If Trim(TextBox2.Text) = "" Then
            MessageBox.Show("密码不能为空")
            Exit Sub
        End If
        Try
            SqlConnection1.Open()
            Dim cmd As New SqlCommand
            cmd = SqlConnection1.CreateCommand
            cmd.CommandText = "select name from yonghu where name='" + Trim(TextBox1.Text) + "'"
            Dim dr As SqlDataReader
            dr = cmd.ExecuteReader
            If dr.Read = -1 Then
                MessageBox.Show("该用户已经注册")
                dr.Close()
                TextBox1.Text = ""
                SqlConnection1.Close()
                Exit Sub
            End If
            dr.Close()
            SqlConnection1.Close()
        Catch ex As Exception
            MessageBox.Show(ex.tostring)
            Exit Sub
        End Try
        Try
            SqlConnection1.Open()
            Dim cmd As New SqlCommand
            cmd = SqlConnection1.CreateCommand
            cmd.CommandText = "insert into yonghu(name,pass) values('" + Trim(TextBox1.Text) + "','" + Trim(TextBox2.Text) + "')"
            cmd.ExecuteNonQuery()
            MessageBox.Show("注册成功")
            SqlConnection1.Close()
        Catch ex As Exception
            MessageBox.Show(ex.ToString)
        End Try
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        If Trim(TextBox1.Text) = "" Then
            MessageBox.Show("用户不能为空")
            Exit Sub
        End If
        If Trim(TextBox2.Text) = "" Then
            MessageBox.Show("密码不能为空")
            Exit Sub
        End If
        Try

        
        SqlConnection1.Open()
        Dim cmd As New SqlCommand
        cmd = SqlConnection1.CreateCommand
            cmd.CommandText = "select name,pass from yonghu where name='" + Trim(TextBox1.Text) + "' and pass='" + Trim(TextBox2.Text) + "'"
            Dim dr As SqlDataReader
            dr = cmd.ExecuteReader
            If dr.Read = -1 Then
                MessageBox.Show("登陆成功")
            Else
                MessageBox.Show("登陆失败")
            End If
            dr.Close()

            SqlConnection1.Close()


        Catch ex As Exception
            MessageBox.Show(ex.ToString)
        End Try



    End Sub
End Class