您所在位置：主题：[原创]求助 哪位高人给改改程序啊 ！~！~
sunnyasa
[专家分：0] 发布于 2007-04-22 15:36:00
我最近做了一个VB.NET+ACCESS的登录窗口的程序。。。
可老是弄不正确。。。请高人帮忙~！~
Public Class Form1
Inherits System.Windows.Forms.Form
Public row As DataRow
Private Sub ExecuteSQL(ByVal SQL As String)
Dim strCnn As String
Dim ds As New DataSet
Dim table As New DataTable
strCnn = "PROVIDER=Mircrosoft.Jet.OLEDB.4.0;Data Source=D:\TestDB.mdb"
Dim DataAdapter1 As New OleDb.OleDbDataAdapter(SQL, strCnn)
DataAdapter1.Fill(ds, "用户表")
table = ds.Tables.Item(0)
row = table.Rows.Item(0)
End Sub
#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 Label3 As System.Windows.Forms.Label
Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
Friend WithEvents Button1 As System.Windows.Forms.Button
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.Label3 = New System.Windows.Forms.Label
Me.TextBox2 = New System.Windows.Forms.TextBox
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'Label1
'
Me.Label1.Font = New System.Drawing.Font("宋体", 24.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
Me.Label1.Location = New System.Drawing.Point(40, 32)
Me.Label1.Name = "Label1"
Me.Label1.Size = New System.Drawing.Size(216, 40)
Me.Label1.TabIndex = 0
Me.Label1.Text = "酒店管理系统"
'
'Label2
'
Me.Label2.Location = New System.Drawing.Point(32, 104)
Me.Label2.Name = "Label2"
Me.Label2.Size = New System.Drawing.Size(48, 16)
Me.Label2.TabIndex = 1
Me.Label2.Text = "用户名"
'
'TextBox1
'
Me.TextBox1.Location = New System.Drawing.Point(112, 96)
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.Size = New System.Drawing.Size(136, 21)
Me.TextBox1.TabIndex = 2
Me.TextBox1.Text = ""
'
'Label3
'
Me.Label3.Location = New System.Drawing.Point(32, 144)
Me.Label3.Name = "Label3"
Me.Label3.Size = New System.Drawing.Size(48, 24)
Me.Label3.TabIndex = 3
Me.Label3.Text = "密码"
'
'TextBox2
'
Me.TextBox2.Location = New System.Drawing.Point(112, 144)
Me.TextBox2.Name = "TextBox2"
Me.TextBox2.Size = New System.Drawing.Size(136, 21)
Me.TextBox2.TabIndex = 4
Me.TextBox2.Text = ""
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(48, 208)
Me.Button1.Name = "Button1"
Me.Button1.TabIndex = 5
Me.Button1.Text = "登录"
'
'Button2
'
Me.Button2.Location = New System.Drawing.Point(176, 208)
Me.Button2.Name = "Button2"
Me.Button2.TabIndex = 6
Me.Button2.Text = "取消"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
Me.ClientSize = New System.Drawing.Size(304, 253)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.TextBox2)
Me.Controls.Add(Me.Label3)
Me.Controls.Add(Me.TextBox1)
Me.Controls.Add(Me.Label2)
Me.Controls.Add(Me.Label1)
Me.Name = "Form1"
Me.Text = "Login"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Label3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label3.Click
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim UserName, UserPwd, SQL As String
UserName = TextBox1.Text
UserPwd = TextBox2.Text
SQL = "SELECT 用户名，密码 FROM 用户表 WHERE(用户名='" & UserName & "')"
Try
ExecuteSQL(SQL)
If row.Item(1) = UserPwd Then
Dim f As New Form2
f.Show()
Me.Hide()
Else
MessageBox.Show("您输入的密码不正确", "信息", MessageBoxButtons.OK, MessageBoxIcon.Information)
Exit Sub
End If
Catch
MessageBox.Show("用户信息不存在", "信息", MessageBoxButtons.OK, MessageBoxIcon.Information)
End Try
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
End
End Sub
End Class
可老是弄不正确。。。请高人帮忙~！~
Public Class Form1
Inherits System.Windows.Forms.Form
Public row As DataRow
Private Sub ExecuteSQL(ByVal SQL As String)
Dim strCnn As String
Dim ds As New DataSet
Dim table As New DataTable
strCnn = "PROVIDER=Mircrosoft.Jet.OLEDB.4.0;Data Source=D:\TestDB.mdb"
Dim DataAdapter1 As New OleDb.OleDbDataAdapter(SQL, strCnn)
DataAdapter1.Fill(ds, "用户表")
table = ds.Tables.Item(0)
row = table.Rows.Item(0)
End Sub
#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 Label3 As System.Windows.Forms.Label
Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
Friend WithEvents Button1 As System.Windows.Forms.Button
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.Label3 = New System.Windows.Forms.Label
Me.TextBox2 = New System.Windows.Forms.TextBox
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'Label1
'
Me.Label1.Font = New System.Drawing.Font("宋体", 24.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
Me.Label1.Location = New System.Drawing.Point(40, 32)
Me.Label1.Name = "Label1"
Me.Label1.Size = New System.Drawing.Size(216, 40)
Me.Label1.TabIndex = 0
Me.Label1.Text = "酒店管理系统"
'
'Label2
'
Me.Label2.Location = New System.Drawing.Point(32, 104)
Me.Label2.Name = "Label2"
Me.Label2.Size = New System.Drawing.Size(48, 16)
Me.Label2.TabIndex = 1
Me.Label2.Text = "用户名"
'
'TextBox1
'
Me.TextBox1.Location = New System.Drawing.Point(112, 96)
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.Size = New System.Drawing.Size(136, 21)
Me.TextBox1.TabIndex = 2
Me.TextBox1.Text = ""
'
'Label3
'
Me.Label3.Location = New System.Drawing.Point(32, 144)
Me.Label3.Name = "Label3"
Me.Label3.Size = New System.Drawing.Size(48, 24)
Me.Label3.TabIndex = 3
Me.Label3.Text = "密码"
'
'TextBox2
'
Me.TextBox2.Location = New System.Drawing.Point(112, 144)
Me.TextBox2.Name = "TextBox2"
Me.TextBox2.Size = New System.Drawing.Size(136, 21)
Me.TextBox2.TabIndex = 4
Me.TextBox2.Text = ""
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(48, 208)
Me.Button1.Name = "Button1"
Me.Button1.TabIndex = 5
Me.Button1.Text = "登录"
'
'Button2
'
Me.Button2.Location = New System.Drawing.Point(176, 208)
Me.Button2.Name = "Button2"
Me.Button2.TabIndex = 6
Me.Button2.Text = "取消"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
Me.ClientSize = New System.Drawing.Size(304, 253)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.TextBox2)
Me.Controls.Add(Me.Label3)
Me.Controls.Add(Me.TextBox1)
Me.Controls.Add(Me.Label2)
Me.Controls.Add(Me.Label1)
Me.Name = "Form1"
Me.Text = "Login"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Label3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label3.Click
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim UserName, UserPwd, SQL As String
UserName = TextBox1.Text
UserPwd = TextBox2.Text
SQL = "SELECT 用户名，密码 FROM 用户表 WHERE(用户名='" & UserName & "')"
Try
ExecuteSQL(SQL)
If row.Item(1) = UserPwd Then
Dim f As New Form2
f.Show()
Me.Hide()
Else
MessageBox.Show("您输入的密码不正确", "信息", MessageBoxButtons.OK, MessageBoxIcon.Information)
Exit Sub
End If
Catch
MessageBox.Show("用户信息不存在", "信息", MessageBoxButtons.OK, MessageBoxIcon.Information)
End Try
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
End
End Sub
End Class