frmborrow1.frm

一个用VB和SQL Server写的图书管理系统

        ElseIf Index = 6 Then
            cboItem(5).Clear
            txtSQL = "select distinct readername from readers where readertype = '" & Trim(cboItem(6)) & "'"
            Set mrcc = ExecuteSQL(txtSQL, MsgText)
            
            If Not mrcc.EOF Then
                Do While Not mrcc.EOF
                    cboItem(5).AddItem mrcc.Fields(0)
                    mrcc.MoveNext
                Loop
            End If
            cboItem(5).ListIndex = 0
            mrcc.Close
        ElseIf Index = 5 Then
            txtSQL = "select * from readers where readername = '" & Trim(cboItem(5)) & "'"
            Set mrcc = ExecuteSQL(txtSQL, MsgText)
            
            If Not mrcc.EOF Then
                cboItem(4).Clear
                cboItem(4).AddItem mrcc!readerno
                cboItem(4).ListIndex = 0
            End If
            
            mrcc.Close
        End If
    End If
End Sub

Private Sub cboItem_KeyDown(Index As Integer, KeyCode As Integer, Shift As Integer)
    EnterToTab KeyCode
    
End Sub

Private Sub cmdExit_Click()
    If mblChange And cmdSave.Enabled Then
        If MsgBox("保存当前记录的变化吗？", vbOKCancel + vbExclamation, "警告") = vbOK Then
            '保存
            Call cmdSave_Click
        End If
    End If
    Unload Me
End Sub

Private Sub cmdSave_Click()
    Dim intCount As Integer
    Dim sMeg As String
    Dim mrcc As ADODB.Recordset
    Dim MsgText As String
    
    For intCount = 0 To 5 Step 5
        If Trim(cboItem(intCount) & " ") = "" Then
            Select Case intCount
                Case 0
                    sMeg = "书籍名称"
                Case 5
                    sMeg = "读者姓名"
                
            End Select
            sMeg = sMeg & "不能为空！"
            MsgBox sMeg, vbOKOnly + vbExclamation, "警告"
            txtItem(intCount).SetFocus
        
            Exit Sub
        End If
    Next intCount
    
    If Trim(txtItem(0)) = "" Then
          MsgBox "借书日期不能为空！", vbOKOnly + vbExclamation, "警告"
          txtItem(0).SetFocus
          Exit Sub
    End If
    
   
    If IsDate(txtItem(0)) Then
        txtItem(0) = Format(txtItem(0), "yyyy-mm-dd")
    Else
        MsgBox "入库时间应输入日期（yyyy-mm-dd）！", vbOKOnly + vbExclamation, "警告"
        txtItem(0).SetFocus
        Exit Sub
    End If
    
    
    If gintBOmode = 2 Then
        txtSQL = "delete from borrowinfo where borrowno = '" & Trim(txtNo) & "'"
        Set mrcc = ExecuteSQL(txtSQL, MsgText)
    End If
    
    txtSQL = "select * from readertype where typename = '" & Trim(cboItem(6)) & "'"
    Set mrcc = ExecuteSQL(txtSQL, MsgText)
    If Not mrcc.EOF Then
        bookNUM = mrcc.Fields(2)
    End If
    mrcc.Close
    
    txtSQL = "select * from borrowinfo where readername = '" & Trim(cboItem(5)) & "' and returndate is null "
    Set mrcc = ExecuteSQL(txtSQL, MsgText)
    If Not mrcc.EOF Then
        Do While Not mrcc.EOF
            bookNUM = bookNUM - 1
            mrcc.MoveNext
        Loop
    End If
    mrcc.Close
    
    If bookNUM <= 0 Then
        MsgBox "借书数量已经到达极限，不能再借！", vbOKOnly + vbExclamation, "警告"
        Exit Sub
    End If
        
    
    
    txtSQL = "select * from books where bookid = '" & Trim(Text1) & "' and putup <> 'y'"
    Set mrcc = ExecuteSQL(txtSQL, MsgText)
    If mrcc.EOF Then
        MsgBox "这本书已经借出！", vbOKOnly + vbExclamation, "警告"
        Exit Sub
    End If
    
    txtSQL = "select * from borrowinfo"
    Set mrcc = ExecuteSQL(txtSQL, MsgText)
    mrcc.AddNew
    mrcc.Fields(0) = Trim(txtNo)
    For intCount = 0 To 1
        mrcc.Fields(intCount + 1) = Trim(cboItem(intCount + 4))
    Next intCount
    
    mrcc!BookID = Trim(Text1)
    mrcc!bookname = Trim(cboItem(0))
    mrcc!borrowdate = Trim(txtItem(0))
    mrcc.Fields(7) = Trim(txtItem(1))
    
    mrcc.Update
    mrcc.Close
    
    txtSQL = "select * from books where bookid = '" & Trim(Text1) & "'"
    Set mrcc = ExecuteSQL(txtSQL, MsgText)
    If Not mrcc.EOF Then
        mrcc!putup = "y"
    End If
    mrcc.Update
    mrcc.Close
        
    
    If gintBOmode = 1 Then
        MsgBox "添加借书信息成功!", vbOKOnly + vbExclamation, "添加借书消息"
        Unload Me
        If flagBOedit Then
            Unload frmBorrow
        End If
        frmBorrow.txtSQL = "select borrowno,readerid,readername,bookid,bookname,borrowdate,memo from borrowinfo where returndate is null"
        frmBorrow.Show
    Else
        MsgBox "修改借书信息成功!", vbOKOnly + vbExclamation, "修改借书消息"
        Unload Me
        If flagBOedit Then
            Unload frmBorrow
        End If
        frmBorrow.txtSQL = "select borrowno,readerid,readername,bookid,bookname,borrowdate,memo from borrowinfo where returndate is null"
        frmBorrow.Show
    End If
    
        
    
    
    
    
End Sub

Private Sub Form_Load()
    Dim sSql As String
    Dim intCount As Integer
    Dim MsgText As String
    
    
    
        If gintBOmode = 1 Then
            Me.Caption = Me.Caption & "添加"
        
        '初始化客房信息
            txtSQL = "select DISTINCT booktype from books "
            Set mrc = ExecuteSQL(txtSQL, MsgText)
        
            If Not mrc.EOF Then
                
                    Do While Not mrc.EOF
                        cboItem(1).AddItem Trim(mrc.Fields(0))
                        mrc.MoveNext
                    Loop
            Else
                MsgBox "请先进行书籍登记！", vbOKOnly + vbExclamation, "警告"
                cmdSave.Enabled = False
                Exit Sub
            End If
            mrc.Close
            
            txtSQL = "select DISTINCT readertype from readers "
            Set mrc = ExecuteSQL(txtSQL, MsgText)
        
            If Not mrc.EOF Then
                
                    Do While Not mrc.EOF
                        cboItem(6).AddItem Trim(mrc.Fields(0))
                        mrc.MoveNext
                    Loop
            Else
                MsgBox "请先进行读者登记！", vbOKOnly + vbExclamation, "警告"
                cmdSave.Enabled = False
                Exit Sub
            End If
            mrc.Close
            
        
            txtNo = GetRkno
                
        ElseIf gintBOmode = 2 Then
            Me.Caption = Me.Caption & "修改"
            
            Set mrc = ExecuteSQL(txtSQL, MsgText)
            If Not mrc.EOF Then
                txtNo = mrc!borrowno
                cboItem(4).Clear
                cboItem(4).AddItem mrc!readerid
                cboItem(4).ListIndex = 0
                
                cboItem(5).Clear
                cboItem(5).AddItem mrc!readername
                cboItem(5).ListIndex = 0
            
                Text1 = Trim(mrc!BookID)
                cboItem(0).Clear
                cboItem(0).AddItem mrc!bookname
                cboItem(0).ListIndex = 0
                
                txtItem(0) = mrc!borrowdate
                txtItem(1) = mrc.Fields(6)
            End If
            mrc.Close
            
            txtSQL = "select distinct readertype from readers where readerno = '" & Trim(cboItem(4)) & "'"
            Set mrc = ExecuteSQL(txtSQL, MsgText)
            
            If Not mrc.EOF Then
                cboItem(6).Clear
                cboItem(6).AddItem mrc.Fields(0)
                cboItem(6).ListIndex = 0
            End If
            mrc.Close
            
            txtSQL = "select * from books where bookid = '" & Trim(Text1) & "'"
            Set mrc = ExecuteSQL(txtSQL, MsgText)
            
            If Not mrc.EOF Then
                cboItem(1).Clear
                cboItem(1).AddItem mrc!booktype
                cboItem(1).ListIndex = 0
                
                cboItem(2).Clear
                cboItem(2).AddItem mrc!bookauthor
                cboItem(2).ListIndex = 0
                
                cboItem(3).Clear
                cboItem(3).AddItem mrc!bookpub
                cboItem(3).ListIndex = 0
                
                txtItem(5) = mrc!bookmemo
                mrc!putup = " "
                mrc.Update
            End If
            
            mrc.Close
                
        End If
    
        mblChange = False
        
    
    
End Sub

Private Sub Form_Unload(Cancel As Integer)
    gintBOmode = 0
End Sub





Private Sub txtItem_Change(Index As Integer)
    '有变化设置gblchange
    mblChange = True
    
End Sub

Private Sub txtItem_GotFocus(Index As Integer)
    txtItem(Index).SelStart = 0
    txtItem(Index).SelLength = Len(txtItem(Index))
    
End Sub

Private Sub txtItem_KeyDown(Index As Integer, KeyCode As Integer, Shift As Integer)
        EnterToTab KeyCode

End Sub


Private Function GetRkno() As String
    GetRkno = Format(Now, "yymmddhhmmss")
    Randomize
    GetRkno = GetRkno & Int((99 - 10 + 1) * Rnd + 10)
End Function