VB实训报告,学生成绩管理系统
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附录：
一、设计的系统界面示意图
二、涉及的代码清单
简易计算器代码：
Dim v As Boolean
Dim s As String
Dim x As Double
Dim y As Double
Private Sub Command1_Click(Index As Integer) If Form.Tag = "T" Then
If Index = 10 Then
Text1.Text = "0."
Else
Text1.Text = command1(Index).Caption
End If
Form1.Tag = ""
Else
a = Text1.Text
Text1.Text = a & Command1(Index).Caption End If
End Sub
Private Sub Command2_Click(Index As Integer) Form1.Tag = "T"
If v Then
x = Text1.Text: v = Not v
Else
y = Text1.Text
Select Case s
Case 0
Text1.Text = x + y
Case 1
Text1.Text = x - y
Case 2
Text1.Text = x * y
Case 3
If y <> 0 Then
Text1.Text = x / y
Else
MsgBox ("不能以0为除数") Text1.Text = x
v = False
End If
End Select
x = Text1.Text
End If
s = Index
End Sub
Private Sub Command3_Click() Form1.Tag = "t": y = Text1.Text Select Case s
Case 0
Text1.Text = x + y
Case 1
Text1.Text = x - y
Case 2
Text1.Text = x * y
Case 3
If y <> 0 Then
Text1.Text = x / y
Else
MsgBox ("不能以0为除数")
Text1.Text = x
End If
End Select
x = Text1.Text: y = 0: v = False: s = 5
End Sub
学生成绩查询代码：
Private Sub Form_Load() '初始化开的课程,在这里所有的班级都开设了这九门课程!
Combo1.AddItem "数学"
Combo1.AddItem "语文"
Combo1.AddItem "英语"
Combo1.AddItem "生物"
Combo1.AddItem "化学"
Combo1.AddItem "物理"
Combo1.AddItem "政治"
Combo1.AddItem "历史"
Combo1.AddItem "地理"
End Sub
Private Sub command4_Click()
Dim a As Single
Dim b As Integer
Dim c As String
If Combo1.Text = "数学" Then
Adodc1.Recordset("数学成绩") = Text3.Text
Adodc1.Recordset.Update
End If
If Combo1.Text = "语文" Then
Adodc1.Recordset("语文成绩") = Text3.Text
Adodc1.Recordset.Update
End If
If Combo1.Text = "英语" Then
Adodc1.Recordset("英语成绩") = Text3.Text
Adodc1.Recordset.Update
End If
If Combo1.Text = "生物" Then
Adodc1.Recordset("生物成绩") = Text3.Text
Adodc1.Recordset.Update
End If
If Combo1.Text = "化学" Then
Adodc1.Recordset("化学成绩") = Text3.Text
Adodc1.Recordset.Update
End If
If Combo1.Text = "物理" Then
Adodc1.Recordset("物理成绩") = Text3.Text
Adodc1.Recordset.Update
End If
If Combo1.Text = "政治" Then
Adodc1.Recordset("政治成绩") = Text3.Text
Adodc1.Recordset.Update
End If
If Combo1.Text = "历史" Then
Adodc1.Recordset("历史成绩") = Text3.Text
Adodc1.Recordset.Update
End If
If Combo1.Text = "地理" Then
Adodc1.Recordset("地理成绩") = Text3.Text
Adodc1.Recordset.Update
End If
Adodc1.Recordset("学生总分") = Val(Adodc1.Recordset("数学成绩")) + Val(Adodc1.Recordset("语文成绩")) + Val(Adodc1.Recordset("英语成绩")) + Val(Adodc1.Recordset("化学成绩")) + Val(Adodc1.Recordset("生物成绩")) +