frmdel_score.frm

用VB开发的一个学生管理系统

VERSION 5.00
Begin VB.Form Frmdel_score 
   Caption         =   "成绩管理-删改"
   ClientHeight    =   4770
   ClientLeft      =   60
   ClientTop       =   420
   ClientWidth     =   8280
   LinkTopic       =   "Form1"
   ScaleHeight     =   4770
   ScaleWidth      =   8280
   StartUpPosition =   2  '屏幕中心
   Begin VB.CommandButton cmd_cancel 
      Caption         =   "返回"
      Height          =   375
      Left            =   4920
      TabIndex        =   15
      Top             =   4200
      Width           =   1095
   End
   Begin VB.CommandButton cmd_del 
      Caption         =   "删除"
      Height          =   375
      Left            =   3240
      TabIndex        =   14
      Top             =   4200
      Width           =   1095
   End
   Begin VB.CommandButton cmd_modify 
      Caption         =   "修改"
      Height          =   375
      Left            =   1560
      TabIndex        =   13
      Top             =   4200
      Width           =   1095
   End
   Begin VB.Frame Frame2 
      Caption         =   "课程基本信息"
      Height          =   1935
      Left            =   480
      TabIndex        =   1
      Top             =   2040
      Width           =   7335
      Begin VB.TextBox score 
         Height          =   375
         Left            =   5160
         TabIndex        =   12
         Top             =   720
         Width           =   735
      End
      Begin VB.TextBox course_name 
         Height          =   375
         Left            =   1920
         TabIndex        =   10
         Top             =   1320
         Width           =   1575
      End
      Begin VB.TextBox stu_name 
         Height          =   375
         Left            =   1920
         TabIndex        =   9
         Top             =   480
         Width           =   1575
      End
      Begin VB.Label Label5 
         Caption         =   "课程成绩："
         Height          =   255
         Left            =   3960
         TabIndex        =   11
         Top             =   840
         Width           =   1095
      End
      Begin VB.Label Label4 
         Caption         =   "课程名称："
         Height          =   255
         Left            =   720
         TabIndex        =   8
         Top             =   1320
         Width           =   975
      End
      Begin VB.Label Label3 
         Caption         =   "学生姓名："
         Height          =   255
         Left            =   720
         TabIndex        =   7
         Top             =   600
         Width           =   975
      End
   End
   Begin VB.Frame Frame1 
      Caption         =   "查询"
      Height          =   1335
      Left            =   480
      TabIndex        =   0
      Top             =   240
      Width           =   7215
      Begin VB.CommandButton cmd_query 
         Caption         =   "查询"
         Height          =   375
         Left            =   5040
         TabIndex        =   6
         Top             =   480
         Width           =   1215
      End
      Begin VB.ComboBox course_no 
         Height          =   300
         Left            =   2040
         TabIndex        =   5
         Top             =   840
         Width           =   1695
      End
      Begin VB.ComboBox stu_no 
         Height          =   300
         Left            =   2040
         TabIndex        =   4
         Top             =   240
         Width           =   1695
      End
      Begin VB.Label Label2 
         Caption         =   "课程编号："
         Height          =   255
         Left            =   840
         TabIndex        =   3
         Top             =   840
         Width           =   1095
      End
      Begin VB.Label Label1 
         Caption         =   "学生学号："
         Height          =   255
         Left            =   840
         TabIndex        =   2
         Top             =   360
         Width           =   975
      End
   End
End
Attribute VB_Name = "Frmdel_score"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Sub initcourse_no()
Dim rstcourse As ADODB.Recordset
sqlStr = "select Course_no from courses "
Set rstcourse = executesql(sqlStr, msgText)
course_no.Clear
If Not rstcourse.EOF Then
Do While Not rstcourse.EOF
   course_no.AddItem Trim(rstcourse.Fields(0))
   rstcourse.MoveNext
Loop
course_no.ListIndex = 0
Else
MsgBox "请添加课程编号", vbOKOnly + vbExclamation, "警告"
Exit Sub
End If
rstcourse.Close
End Sub
Sub initstu_no()
Dim rststudent As ADODB.Recordset
sqlStr = "select stu_no from students "
Set rststudent = executesql(sqlStr, msgText)
stu_no.Clear
If Not rststudent.EOF Then
Do While Not rststudent.EOF
   stu_no.AddItem Trim(rststudent.Fields(0))
   rststudent.MoveNext
Loop
stu_no.ListIndex = 0
Else
MsgBox "请添加学生编号", vbOKOnly + vbExclamation, "警告"
Exit Sub
End If
rststudent.Close
End Sub
Private Sub cmd_cancel_Click()
Unload Me
End Sub

Private Sub cmd_del_Click()
Dim conn As ADODB.Connection
sqlStr = "delete from score  where stu_no='" & stu_no.Text & "'and course_no='" & course_no.Text & "'"
On Error GoTo exitsub
Set conn = New ADODB.Connection
conn.Open connStr
conn.Execute sqlStr
MsgBox "修改数据成功！"

exitsub:
conn.Close
initform

End Sub

Private Sub cmd_modify_Click()
Dim conn As ADODB.Connection
sqlStr = "update score set [score]='" & score.Text & "' where stu_no='" & stu_no.Text & "' and course_no='" & course_no.Text & "'"
On Error GoTo exitsub
Set conn = New ADODB.Connection
conn.Open connStr
conn.Execute sqlStr
MsgBox "修改数据成功！"

exitsub:
conn.Close

initform



End Sub

Private Sub cmd_query_Click()
Dim rs As ADODB.Recordset
sqlStr = "select Score from score where Course_no ='" & course_no.Text & "' and stu_no='" & stu_no.Text & "'"
Set rs = executesql(sqlStr, msgText)
If Not rs.EOF Then
score.Text = rs.Fields(0)
rs.Close
Else
MsgBox "你查找的信息不存在！", vbOKOnly + vbExclamation, "警告"
Exit Sub
End If
End Sub

Private Sub Form_Load()
initcourse_no
initstu_no
initform
End Sub
Sub initform()
course_no.Text = ""
course_name.Text = ""
stu_no.Text = ""
stu_name.Text = ""
score.Text = ""
End Sub
Private Sub stu_no_click()
Dim rststudent As ADODB.Recordset
sqlStr = "select name from students where stu_no='" & stu_no.Text & "'"
Set rststudent = executesql(sqlStr, msgText)
If Not rststudent.EOF Then
stu_name.Text = rststudent.Fields(0)
rststudent.Close
End If
End Sub
Private Sub course_no_click()
Dim rstcourse As ADODB.Recordset
sqlStr = "select Course_name from courses where Course_no='" & course_no.Text & "'"
Set rstcourse = executesql(sqlStr, msgText)
If Not rstcourse.EOF Then
course_name.Text = rstcourse.Fields(0)
rstcourse.Close
End If
End Sub