form2.frm

visual basic 6 与sql连接的几个例子

VERSION 5.00
Object = "{67397AA1-7FB1-11D0-B148-00A0C922E820}#6.0#0"; "MSADODC.OCX"
Object = "{CDE57A40-8B86-11D0-B3C6-00A0C90AEA82}#1.0#0"; "MSDATGRD.OCX"
Begin VB.Form Form2 
   Caption         =   "Form2"
   ClientHeight    =   3225
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5565
   LinkTopic       =   "Form2"
   ScaleHeight     =   3225
   ScaleWidth      =   5565
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton CmdReturn 
      Caption         =   "返回"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   4320
      TabIndex        =   1
      Top             =   2520
      Width           =   855
   End
   Begin MSAdodcLib.Adodc AdodcGrid 
      Height          =   495
      Left            =   360
      Top             =   2520
      Width           =   2535
      _ExtentX        =   4471
      _ExtentY        =   873
      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;Persist Security Info=False;User ID=sa;Initial Catalog=学生管理数据库;Data Source=(local)"
      OLEDBString     =   "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=学生管理数据库;Data Source=(local)"
      OLEDBFile       =   ""
      DataSourceName  =   ""
      OtherAttributes =   ""
      UserName        =   "sa"
      Password        =   ""
      RecordSource    =   ""
      Caption         =   "AdodcGrid"
      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 MSDataGridLib.DataGrid DtgCond 
      Height          =   2055
      Left            =   240
      TabIndex        =   0
      Top             =   240
      Width           =   5055
      _ExtentX        =   8916
      _ExtentY        =   3625
      _Version        =   393216
      HeadLines       =   1
      RowHeight       =   18
      BeginProperty HeadFont {0BE35203-8F91-11CE-9DE3-00AA004BB851} 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      BeginProperty Font {0BE35203-8F91-11CE-9DE3-00AA004BB851} 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ColumnCount     =   2
      BeginProperty Column00 
         DataField       =   ""
         Caption         =   ""
         BeginProperty DataFormat {6D835690-900B-11D0-9484-00A0C91110ED} 
            Type            =   0
            Format          =   ""
            HaveTrueFalseNull=   0
            FirstDayOfWeek  =   0
            FirstWeekOfYear =   0
            LCID            =   2052
            SubFormatType   =   0
         EndProperty
      EndProperty
      BeginProperty Column01 
         DataField       =   ""
         Caption         =   ""
         BeginProperty DataFormat {6D835690-900B-11D0-9484-00A0C91110ED} 
            Type            =   0
            Format          =   ""
            HaveTrueFalseNull=   0
            FirstDayOfWeek  =   0
            FirstWeekOfYear =   0
            LCID            =   2052
            SubFormatType   =   0
         EndProperty
      EndProperty
      SplitCount      =   1
      BeginProperty Split0 
         BeginProperty Column00 
         EndProperty
         BeginProperty Column01 
         EndProperty
      EndProperty
   End
End
Attribute VB_Name = "Form2"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub CmdReturn_Click()     ' “返回”按钮
  Unload Me
End Sub

Private Sub Form_Load()
  Dim strSno As String
  Dim strSelect As String
  
  '得到form1窗体上当前显示的记录的学号
  strSno = Trim(Form1.TxtSno.Text)
  '编写满足要求的查询语句，查找学号值等于给定值的学生的姓名、修的课程名、学分和成绩
  strSelect = "select Sname, Cname,Ccredit,Grade from student s join sc " _
            & "on s.sno = sc.sno join course c on c.cno = sc.cno where " _
            & "sc.sno = '" & strSno & "'"
  
  '设置ADO数据控件相应的属性
  AdodcGrid.CommandType = adCmdText
  AdodcGrid.RecordSource = strSelect
  '使ADO数据控件的新属性生效
  AdodcGrid.Refresh
  
  '设置DataGrid控件的数据源为ADO数据控件的结果集
  Set DtgCond.DataSource = AdodcGrid
  '调用DtgCond控件的初始化过程
  Call InitGrid
    
End Sub

Private Sub InitGrid()           '初始化dtgCond控件
  With DtgCond
    '设置DtgCond的列标题
    .Columns(0).Caption = "学号"
    .Columns(1).Caption = "课程名"
    .Columns(2).Caption = "学分"
    .Columns(3).Caption = "成绩"
        
    '设置DtgCond的列宽
    .Columns(0).Width = 1000
    .Columns(1).Width = 2000
    .Columns(2).Width = 800
    .Columns(3).Width = 800
  End With
End Sub