frmsrchissue.frm

该压缩包包含有很多关于数据库原理与应用的课件以及课程设计

VERSION 5.00
Begin VB.Form frmSrchIssue 
   Caption         =   "外借图书查询"
   ClientHeight    =   5640
   ClientLeft      =   120
   ClientTop       =   420
   ClientWidth     =   6840
   LinkTopic       =   "Form2"
   MDIChild        =   -1  'True
   ScaleHeight     =   5640
   ScaleWidth      =   6840
   WindowState     =   2  'Maximized
   Begin VB.CommandButton cmdMemberOpen 
      Caption         =   "..."
      Height          =   255
      Left            =   4320
      TabIndex        =   12
      Top             =   2640
      Width           =   975
   End
   Begin VB.TextBox txtFineAmt 
      Height          =   495
      Left            =   2520
      TabIndex        =   11
      Text            =   "Text1"
      Top             =   4080
      Width           =   1815
   End
   Begin VB.TextBox txtDaysUsed 
      Height          =   495
      Left            =   2520
      TabIndex        =   9
      Text            =   "Text1"
      Top             =   3280
      Width           =   1815
   End
   Begin VB.TextBox txtLibraryId 
      Height          =   495
      Left            =   2520
      TabIndex        =   7
      Text            =   "Text1"
      Top             =   2480
      Width           =   1815
   End
   Begin VB.TextBox txtIssueDate 
      Height          =   495
      Left            =   2520
      TabIndex        =   4
      Text            =   "Text1"
      Top             =   1680
      Width           =   1815
   End
   Begin VB.Frame Frame1 
      Caption         =   "输入图书编号后回车"
      Height          =   975
      Left            =   360
      TabIndex        =   0
      Top             =   360
      Width           =   5535
      Begin VB.CommandButton cmdBookOpen 
         Caption         =   "..."
         Height          =   255
         Left            =   4080
         TabIndex        =   3
         Top             =   480
         Width           =   855
      End
      Begin VB.TextBox txtBookId 
         Height          =   495
         Left            =   2160
         TabIndex        =   2
         Text            =   "Text1"
         Top             =   360
         Width           =   1815
      End
      Begin VB.Label Label1 
         Caption         =   "图书编号"
         BeginProperty Font 
            Name            =   "微软雅黑"
            Size            =   14.25
            Charset         =   134
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         Height          =   615
         Left            =   120
         TabIndex        =   1
         Top             =   360
         Width           =   1335
      End
   End
   Begin VB.Label Label5 
      Caption         =   "罚款金额"
      BeginProperty Font 
         Name            =   "微软雅黑"
         Size            =   14.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   480
      TabIndex        =   10
      Top             =   4080
      Width           =   1695
   End
   Begin VB.Label Label4 
      Caption         =   "用户使用天数"
      BeginProperty Font 
         Name            =   "微软雅黑"
         Size            =   14.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   480
      TabIndex        =   8
      Top             =   3360
      Width           =   1815
   End
   Begin VB.Label Label3 
      Caption         =   "图书馆编号"
      BeginProperty Font 
         Name            =   "微软雅黑"
         Size            =   14.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   480
      TabIndex        =   6
      Top             =   2520
      Width           =   1455
   End
   Begin VB.Label Label2 
      Caption         =   "借书日期"
      BeginProperty Font 
         Name            =   "微软雅黑"
         Size            =   14.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   615
      Left            =   480
      TabIndex        =   5
      Top             =   1680
      Width           =   1335
   End
End
Attribute VB_Name = "frmSrchIssue"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Txtbookid_KeyPress(KeyAscii As Integer)
Dim BookNo As String
Dim issueDate As Date
Dim currDate As Date
Dim totalDaysUsed As Integer
Dim totalFineAmt As Integer
'获取图书编号
BookNo = txtBookId.Text
'若用户按回车键，则自动产生记录
If KeyAscii = 13 Then
    clear
    If Not IsNumeric(BookNo) Then
        MsgBox "Invalid search key entered", vbCritical, "Search error"
        Call clear
        Exit Sub
    End If
    
    rsIssueInfo.MoveFirst
    For i = 0 To rsIssueInfo.RecordCount
        If rsIssueInfo.EOF = True Then
            Exit For
        End If
        '返回相关图书信息
        If rsIssueInfo(0) = Val(Trim$(BookNo)) Then
            txtLibraryId.Text = rsIssueInfo(2)
            txtReturnDate.Text = Format(Now, "mm/dd/yy")    '获取当前日期
            txtIssueDate.Text = rsIssueInfo(1)
            issueDate = CDate(txtIssueDate.Text)
            currDate = CDate(Format(Now, "mm/dd/yy"))
            totalDaysUsed = DateDiff("d", issueDate, currDate)
            If totalDaysUsed > maxDays Then         '判断学生还书是否过期
                txtFineAmt.Visible = True
                lblFineAmt.Visible = True
               
                totalDaysUsed = totalDaysUsed - maxDays
                totalFineAmt = fineAmt * totalDaysUsed
                
                txtDaysUsed.ForeColor = vbRed
                txtFineAmt.ForeColor = vbRed
                txtDaysUsed.Text = totalDaysUsed & "Days Beyond Limit"
                txtFineAmt.Text = "$" & totalFineAmt    '返回总天数
            Else
                txtDaysUsed.ForeColor = vbBlack
                txtFineAmt.Visible = False
                lblFineAmt.Visible = False
                txtDaysUsed.Text = totalDaysUsed
            End If
            Exit For
        End If
        rsIssueInfo.MoveNext
        Next
        
        If txtLibraryId.Text = "" Then
            MsgBox "Book Not Issued", vbInformation, "Search Not Found"
            'cmdSave.Enabled = False
            clear
        End If
    End If
End Sub