frmquerybook.frm

中小型图书馆管理系统开发

VERSION 5.00
Object = "{5E9E78A0-531B-11CF-91F6-C2863C385E30}#1.0#0"; "Msflxgrd.ocx"
Begin VB.Form frmQueryBook 
   Caption         =   "图书查询"
   ClientHeight    =   4785
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   9255
   LinkTopic       =   "Form1"
   ScaleHeight     =   4785
   ScaleWidth      =   9255
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton cmdBack 
      Caption         =   "返回(&B)"
      Height          =   375
      Left            =   4920
      TabIndex        =   12
      Top             =   1800
      Width           =   1575
   End
   Begin VB.Frame Frame2 
      Caption         =   "查询条件"
      Height          =   1455
      Left            =   5880
      TabIndex        =   8
      Top             =   120
      Width           =   3255
      Begin VB.TextBox txtKeywords 
         Height          =   375
         Left            =   960
         TabIndex        =   9
         Top             =   720
         Width           =   1455
      End
      Begin VB.Label Label1 
         Caption         =   "请输入查询条件："
         Height          =   255
         Left            =   480
         TabIndex        =   10
         Top             =   360
         Width           =   1575
      End
   End
   Begin VB.Frame Frame1 
      Caption         =   "选择查询方式"
      Height          =   1455
      Left            =   120
      TabIndex        =   2
      Top             =   120
      Width           =   5655
      Begin VB.OptionButton optQuery 
         Caption         =   "按作者查询"
         Height          =   255
         Index           =   5
         Left            =   3120
         TabIndex        =   11
         Top             =   1080
         Width           =   1575
      End
      Begin VB.OptionButton optQuery 
         Caption         =   "按ISBN查询"
         Height          =   255
         Index           =   4
         Left            =   3120
         TabIndex        =   7
         Top             =   720
         Width           =   1575
      End
      Begin VB.OptionButton optQuery 
         Caption         =   "按出版社查询"
         Height          =   255
         Index           =   3
         Left            =   3120
         TabIndex        =   6
         Top             =   360
         Width           =   1575
      End
      Begin VB.OptionButton optQuery 
         Caption         =   "按书名查询"
         Height          =   255
         Index           =   2
         Left            =   360
         TabIndex        =   5
         Top             =   1080
         Width           =   1575
      End
      Begin VB.OptionButton optQuery 
         Caption         =   "查询全部"
         Height          =   255
         Index           =   0
         Left            =   360
         TabIndex        =   4
         Top             =   360
         Width           =   1575
      End
      Begin VB.OptionButton optQuery 
         Caption         =   "按图书编号查询"
         Height          =   495
         Index           =   1
         Left            =   360
         TabIndex        =   3
         Top             =   600
         Width           =   1815
      End
   End
   Begin MSFlexGridLib.MSFlexGrid fgBook 
      Height          =   2055
      Left            =   120
      TabIndex        =   1
      Top             =   2640
      Width           =   9015
      _ExtentX        =   15901
      _ExtentY        =   3625
      _Version        =   393216
   End
   Begin VB.CommandButton cmdQuery 
      Caption         =   "查询(&Q)"
      Height          =   375
      Left            =   2160
      TabIndex        =   0
      Top             =   1800
      Width           =   1575
   End
End
Attribute VB_Name = "frmQueryBook"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim conn As New ADODB.Connection
Dim cmd As New ADODB.Command
Dim rs As New ADODB.Recordset
Dim sql As String

Private Sub cmdBack_Click()
Unload Me

End Sub

Private Sub cmdQuery_Click()

Dim i As Integer
Dim j As Integer

fgBook.Visible = False

If optQuery(0).Value <> True And txtKeywords.Text = "" Then
    frmQueryBook.Height = 2800
    MsgBox "查询条件不能为空，请重新输入查询条件！！", vbExclamation, "错误提示"
    txtKeywords.SetFocus
    Exit Sub
End If


For i = 0 To 5
    If (optQuery(i).Value) Then
       Select Case i
          Case 0
             sql = "SELECT * FROM book"
          Case 1
             sql = "SELECT * FROM book where bookid='" & txtKeywords.Text & "'"
          Case 2
             sql = "SELECT * FROM book where bookname like '%" & txtKeywords.Text & "%'"
          Case 3
             sql = "SELECT * FROM book where publisher like '%" & txtKeywords.Text & "%'"
          Case 4
             sql = "SELECT * FROM book where ISBN='" & txtKeywords.Text & "'"
          Case 5
             sql = "SELECT * FROM book where author like '%" & txtKeywords.Text & "%'"

       End Select
        
    End If
Next i

'设置具体的SQL语句
cmd.CommandText = sql

'执行SQL语句，建立打开记录集
rs.Open cmd, , adOpenKeyset

'先将记录集移到首记录，然后显示记录内容
'rs.MoveLast
If rs.RecordCount = 0 Then

    frmQueryBook.Height = 2800

    MsgBox "没有查找满足条件的数据！", vbExclamation, "提示"
   
Else
    fgBook.Rows = rs.RecordCount + 1
    
    fgBook.Cols = 8
    
    'Print fgBook.Rows
    
    '设定行高
    For i = 0 To fgBook.Rows - 1
       fgBook.RowHeight(i) = 280
    Next i
    
    '设定列的属性
    fgBook.Row = 0
    
    For i = 0 To fgBook.Cols - 1
       fgBook.Col = i  '指定当前列为第i列
       fgBook.FixedAlignment(i) = 4  '每列内容居中显示
       Select Case i
           Case 0
              fgBook.ColWidth(i) = 620  '设定列宽
              fgBook.Text = "序号"
           Case 1
              fgBook.ColWidth(i) = 920  '设定列宽
              fgBook.Text = "图书编号"
           Case 2
              fgBook.ColWidth(i) = 2500  '设定列宽
              fgBook.Text = "书名"
           Case 3
              fgBook.ColWidth(i) = 2000  '设定列宽
              fgBook.Text = "作者"
           Case 4
              fgBook.ColWidth(i) = 1000  '设定列宽
              fgBook.Text = "价格"
           Case 5
              fgBook.ColWidth(i) = 2000  '设定列宽
              fgBook.Text = "出版社"
           Case 6
              fgBook.ColWidth(i) = 1000  '设定列宽
              fgBook.Text = "图书类别"
           Case 7
              fgBook.ColWidth(i) = 1500  '设定列宽
              fgBook.Text = "ISBN"
        End Select
           
    Next i
       
       
    'rs.MoveFirst
    
    i = 1
    
    While (Not rs.EOF)
    
       fgBook.Row = i
       For j = 0 To fgBook.Cols - 1
       
        fgBook.Col = j '设置当前为列为第j列
        fgBook.CellAlignment = 4  '每列内容居中显示
    
        
        Select Case j
            Case 0
               fgBook.Text = "" & i
            Case 1
               fgBook.Text = rs.Fields("bookid")
            Case 2
               fgBook.Text = rs.Fields("bookname")
            Case 3
               fgBook.Text = rs.Fields("author")
            Case 4
               fgBook.Text = rs.Fields("bookprice")
            Case 5
               fgBook.Text = rs.Fields("publisher")
            Case 6
               fgBook.Text = rs.Fields("booktype")
            Case 7
               fgBook.Text = rs.Fields("ISBN")
        End Select
      Next j
    
        'Print rs.Fields("bookid"), rs.Fields("bookname")
        rs.MoveNext
        i = i + 1
    Wend
    fgBook.Visible = True
    frmQueryBook.Height = 5190

End If

rs.Close




End Sub

Private Sub Form_Load()

'窗体居中显示

Me.Top = (Screen.Height - Me.Height) \ 2
Me.Left = (Screen.Width - Me.Width) \ 2


'使用Connection对象与具体的数据库文件相连接
conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\db\library.mdb"

'每个Command必须与一个Connection对象连接
Set cmd.ActiveConnection = conn

'设置命令的类型是使用SQL语句
cmd.CommandType = adCmdText

optQuery(0).Value = True

frmQueryBook.Height = 2800


End Sub

Private Sub Form_Unload(Cancel As Integer)
conn.Close
End Sub

Private Sub optQuery_Click(Index As Integer)
    If Index = 0 Then
        txtKeywords.Enabled = False
    Else
        txtKeywords.Enabled = True
    End If
End Sub