login.frm

用VB实现SQL数据库编程

VERSION 5.00
Object = "{67397AA1-7FB1-11D0-B148-00A0C922E820}#6.0#0"; "MSADODC.OCX"
Begin VB.Form loginfrm 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "合同管理系统登录"
   ClientHeight    =   4125
   ClientLeft      =   45
   ClientTop       =   435
   ClientWidth     =   5610
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   Picture         =   "login.frx":0000
   ScaleHeight     =   4125
   ScaleWidth      =   5610
   StartUpPosition =   2  'CenterScreen
   Begin VB.ComboBox Combo1 
      Height          =   315
      ItemData        =   "login.frx":C7C3
      Left            =   1320
      List            =   "login.frx":C7D0
      TabIndex        =   6
      Text            =   "普通用户"
      Top             =   1800
      Width           =   1935
   End
   Begin VB.TextBox passtext 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      IMEMode         =   3  'DISABLE
      Left            =   2520
      PasswordChar    =   "*"
      TabIndex        =   3
      Top             =   1080
      Width           =   1215
   End
   Begin VB.TextBox nametext 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   2520
      TabIndex        =   2
      Top             =   240
      Width           =   1215
   End
   Begin VB.CommandButton cancel 
      Caption         =   "取消"
      Height          =   495
      Left            =   2400
      TabIndex        =   1
      Top             =   2520
      Width           =   1215
   End
   Begin VB.CommandButton login 
      Caption         =   "登录"
      Height          =   495
      Left            =   840
      TabIndex        =   0
      Top             =   2520
      Width           =   1215
   End
   Begin MSAdodcLib.Adodc Adodc1 
      Height          =   375
      Left            =   1560
      Top             =   3360
      Visible         =   0   'False
      Width           =   1575
      _ExtentX        =   2778
      _ExtentY        =   661
      ConnectMode     =   0
      CursorLocation  =   3
      IsolationLevel  =   -1
      ConnectionTimeout=   15
      CommandTimeout  =   30
      CursorType      =   3
      LockType        =   3
      CommandType     =   1
      CursorOptions   =   0
      CacheSize       =   50
      MaxRecords      =   0
      BOFAction       =   0
      EOFAction       =   0
      ConnectStringType=   1
      Appearance      =   1
      BackColor       =   -2147483643
      ForeColor       =   -2147483640
      Orientation     =   0
      Enabled         =   -1
      Connect         =   "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=cms;Data Source=E10"
      OLEDBString     =   "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=cms;Data Source=E10"
      OLEDBFile       =   ""
      DataSourceName  =   ""
      OtherAttributes =   ""
      UserName        =   ""
      Password        =   ""
      RecordSource    =   "select * from userinfo"
      Caption         =   "Adodc1"
      BeginProperty Font {0BE35203-8F91-11CE-9DE3-00AA004BB851} 
         Name            =   "宋体"
         Size            =   9
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      _Version        =   393216
   End
   Begin VB.Label passlabel 
      BackStyle       =   0  'Transparent
      Caption         =   "密码："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   840
      TabIndex        =   5
      Top             =   1200
      Width           =   1215
   End
   Begin VB.Label namelabel 
      BackStyle       =   0  'Transparent
      Caption         =   "用户名："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   840
      TabIndex        =   4
      Top             =   360
      Width           =   1215
   End
End
Attribute VB_Name = "loginfrm"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub cancel_Click()
  Unload Me
End Sub

Private Sub login_Click()
  Static Count As Integer
  Dim sqlstr As String
  sqlstr = "select * from userinfo where [user]='" & nametext & "'"
  Adodc1.RecordSource = sqlstr
  Adodc1.Refresh
  If Adodc1.Recordset.BOF Then
    MsgBox "用户名错误，重新输入", vbExclamation, "警告"
    nametext.Text = ""
    nametext.SetFocus
  Else
    If Trim(Adodc1.Recordset.Fields("pass")) = Trim(passtext) Then
      mainMDIfrm.Show
      Me.Hide
    Else
      MsgBox "密码错误，重新输入", vbExclamation, "警告"
      passtext.Text = ""
      passtext.SetFocus
    End If
  End If
  Count = Count + 1
  If Count = 3 Then Unload Me
End Sub