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来自「vb模拟 图书管理系统」· 代码 · 共 217 行

VERSION 5.00
Begin VB.Form 图书归还 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "还书处理"
   ClientHeight    =   4335
   ClientLeft      =   45
   ClientTop       =   435
   ClientWidth     =   3990
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   4335
   ScaleWidth      =   3990
   StartUpPosition =   2  '屏幕中心
   Begin VB.CommandButton Command3 
      Caption         =   "返回"
      Height          =   375
      Left            =   2160
      TabIndex        =   10
      Top             =   3600
      Width           =   1455
   End
   Begin VB.CommandButton Command2 
      Caption         =   "列罚款单"
      Height          =   375
      Left            =   360
      TabIndex        =   9
      Top             =   3600
      Width           =   1335
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确定"
      Height          =   255
      Left            =   2520
      TabIndex        =   3
      Top             =   600
      Width           =   735
   End
   Begin VB.Frame Frame2 
      Caption         =   "还书人信息"
      Height          =   2055
      Left            =   360
      TabIndex        =   1
      Top             =   1440
      Width           =   3255
      Begin VB.TextBox Text6 
         Height          =   270
         Left            =   960
         TabIndex        =   8
         Top             =   1680
         Width           =   615
      End
      Begin VB.TextBox Text5 
         Height          =   270
         Left            =   2400
         TabIndex        =   7
         Top             =   1320
         Width           =   615
      End
      Begin VB.TextBox Text4 
         Height          =   270
         Left            =   960
         TabIndex        =   6
         Top             =   1320
         Width           =   615
      End
      Begin VB.TextBox Text3 
         Height          =   270
         Left            =   960
         TabIndex        =   5
         Top             =   840
         Width           =   1455
      End
      Begin VB.TextBox Text2 
         Height          =   270
         Left            =   960
         TabIndex        =   4
         Top             =   360
         Width           =   1455
      End
      Begin VB.Label Label5 
         Caption         =   "罚    金"
         Height          =   255
         Left            =   120
         TabIndex        =   15
         Top             =   1680
         Width           =   735
      End
      Begin VB.Label Label4 
         Caption         =   "可借书数"
         Height          =   255
         Left            =   1680
         TabIndex        =   14
         Top             =   1320
         Width           =   735
      End
      Begin VB.Label Label3 
         Caption         =   "已借书数"
         Height          =   255
         Left            =   120
         TabIndex        =   13
         Top             =   1320
         Width           =   735
      End
      Begin VB.Label Label2 
         Caption         =   "姓    名"
         Height          =   255
         Left            =   120
         TabIndex        =   12
         Top             =   840
         Width           =   735
      End
      Begin VB.Label Label1 
         Caption         =   "借书证号"
         Height          =   255
         Left            =   120
         TabIndex        =   11
         Top             =   360
         Width           =   735
      End
   End
   Begin VB.Frame Frame1 
      Caption         =   "输入图书编号"
      Height          =   855
      Left            =   360
      TabIndex        =   0
      Top             =   240
      Width           =   3255
      Begin VB.TextBox Text1 
         Height          =   270
         Left            =   240
         TabIndex        =   2
         Top             =   360
         Width           =   1575
      End
   End
End
Attribute VB_Name = "图书归还"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public rno As String
Public bno As String

Private Sub Command1_Click()
bno = Trim(Text1.Text)
If bno <> "" Then
Dim sqltxt As String
sqltxt = "select * from borrow where 图书编号='" + bno + "'"
Set brs = exesql(sqltxt)
If brs.RecordCount = 0 Then
MsgBox "该书不是从本图书馆所借的，不能归还！", vbOKOnly, "信息提示"
Else
If Trim(brs.Fields("借书证号")) <> rno Then
If rno <> " " Then
dstr = "罚款单" + Chr(10) + Chr(13)
dstr = dstr & "姓名：" & Trim(Text3.Text) + "(" + rno + ")罚款总数：" & Trim(Text6.Text) & "元"
MsgBox dstr, vbOKOnly, "列罚款单"
End If
rno = Trim(brs.Fields("借书证号"))
sqltxt = "select *from book where 图书编号='" + bno + "'"
Set bs = exesql(sqltxt)
bs.Fields("借否") = "否"
bs.Update
sqltxt = "select * from reader where  借书证号='" + rno + "'"
Set rs = exesql(sqltxt)
rs.Fields("已借书数") = rs.Fields("已借书数") - 1
rs.Update
Text2.Text = rno
Text3.Text = rs.Fields("姓名")
Text4.Text = rs.Fields("已借书数")
Text5.Text = rs.Fields("借书总数") - rs.Fields("已借书数")
If (Date - brs.Fields("借书日期") < rs.Fields("借书天数")) Then
Text6.Text = 0
Else
Text6.Text = (Date - brs.Fields("借书日期") - rs.Fields("借书天数")) * rs.Fields("过期罚款")
End If
MsgBox "过期罚款：" + Str(rs.Fields("过期罚款"))
Else
rno = Trim(brs.Fields("借书证号"))
sqltxt = "select *from book where 图书编号='" + bno + "'"
Set bs = exesql(sqltxt)
bs.Fields("借否") = "否"
bs.Update
sqltxt = "select *from reader where 图书编号='" + rno + "'"
Set bs = exesql(sqltxt)
rs.Fields("已借书数") = rs.Fields("已借书数") - 1
rs.Update
If (Date - brs.Fields("借书日期") > rs.Fields("借书天数")) Then
Text6.Text = Val(Text6.Text) + (Date - brs.Fields("借书日期") - rs.Fields("借书天数")) * rs.Fields("过期罚款")
End If
End If
brs.Delete
brs.Update
End If
Else
MsgBox "图书编号不能为空", vbOKOnly, "信息提示"
End If
End Sub

Private Sub Command2_Click()
Dim dstr As String
dstr = "罚款单" + Chr(10) + Chr(13)
dstr = dstr & "姓名：" & Trim(Text3.Text) + "(" + Trim(Text2.Text) _
+ ")罚款总额：" & Trim(Text6.Text) & "元"
MsgBox dstr, vbOKOnly, "列罚款单"
End Sub

Private Sub Command3_Click()
Unload Me
End Sub

Private Sub Form_Load()
rno = ""
End Sub