frmquery.frm

实现学生成绩管理一个很好的vb实例可用作课程设计

VERSION 5.00
Begin VB.Form frmQuery 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "查询"
   ClientHeight    =   2550
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   3585
   Icon            =   "frmQuery.frx":0000
   LinkTopic       =   "Form2"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2550
   ScaleWidth      =   3585
   ShowInTaskbar   =   0   'False
   StartUpPosition =   1  '所有者中心
   Begin VB.CommandButton Command2 
      Caption         =   "取消"
      Height          =   375
      Left            =   2040
      TabIndex        =   7
      Top             =   2040
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确定"
      Height          =   375
      Left            =   360
      TabIndex        =   6
      Top             =   2040
      Width           =   1215
   End
   Begin VB.ComboBox comYear 
      Height          =   300
      Left            =   960
      Style           =   2  'Dropdown List
      TabIndex        =   5
      Top             =   1200
      Width           =   1335
   End
   Begin VB.ComboBox comMajor 
      Height          =   300
      Left            =   960
      Style           =   2  'Dropdown List
      TabIndex        =   3
      Top             =   720
      Width           =   1815
   End
   Begin VB.ComboBox comSchool 
      Height          =   300
      Left            =   960
      Style           =   2  'Dropdown List
      TabIndex        =   1
      Top             =   240
      Width           =   1815
   End
   Begin VB.Label Label4 
      Caption         =   "年级"
      Height          =   255
      Left            =   360
      TabIndex        =   4
      Top             =   1320
      Width           =   495
   End
   Begin VB.Label Label3 
      Caption         =   "专业"
      Height          =   255
      Left            =   360
      TabIndex        =   2
      Top             =   840
      Width           =   495
   End
   Begin VB.Label Label2 
      Caption         =   "院系"
      Height          =   255
      Left            =   360
      TabIndex        =   0
      Top             =   360
      Width           =   495
   End
End
Attribute VB_Name = "frmQuery"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub Command1_Click()
    Dim i As Integer
    Dim s As String
   
    recset.Close        '关闭记录集
    s = "Select * from 成绩 Where True  "
    If comSchool.ListIndex > -1 Then
        s = s & " And 院系 = " & comSchool.ListIndex + 1
    End If
    If comMajor.ListIndex > -1 Then
        s = s & " And 专业 = " & GetMajorNum(comMajor.Text, comSchool.ListIndex + 1)
    End If
    If comYear.ListIndex > -1 Then
        s = s & " And 年级 = " & comYear.Text
    End If
    Set recset = db.OpenRecordset(s)   '打开记录集
    
    frmMain.Grid.FormatString = "^序号|<姓　名|<　　院　　系　　|<　　专　　业　　|>年级|>高等数学|>大学英语|>普通物理|>电子技术"
    
    frmMain.Grid.Rows = 1
    
    For i = 1 To frmMain.Grid.Rows - 1
           frmMain.Grid.TextMatrix(i, 0) = i
    Next
    i = 0
    With recset
        Do While Not .EOF
           i = i + 1
           frmMain.Grid.Rows = frmMain.Grid.Rows + 1
           frmMain.Grid.TextMatrix(i, 1) = !姓名
           frmMain.Grid.TextMatrix(i, 2) = GetSchool(!院系)
           frmMain.Grid.TextMatrix(i, 3) = GetMajor(!专业, !院系)
           frmMain.Grid.TextMatrix(i, 4) = !年级
           frmMain.Grid.TextMatrix(i, 5) = !高等数学
           frmMain.Grid.TextMatrix(i, 6) = !大学英语
           frmMain.Grid.TextMatrix(i, 7) = !普通物理
           frmMain.Grid.TextMatrix(i, 8) = !电子技术
           .MoveNext
        Loop
    End With
    
    Unload Me

End Sub

Private Sub Command2_Click()
    Unload Me
End Sub

Private Sub comSchool_click()
    comMajor.Clear
    recmajor.MoveFirst
    Do While Not recmajor.EOF
        If recmajor!院系 = comSchool.ListIndex + 1 Then
            comMajor.AddItem recmajor!名称
        End If
        recmajor.MoveNext
    Loop

End Sub

Private Sub Form_Load()
    Dim i As Integer
    recschool.MoveFirst
    Do While Not recschool.EOF
        comSchool.AddItem recschool!名称
        recschool.MoveNext
    Loop
    For i = 1 To 20
        comYear.AddItem i + 2000
    Next
End Sub