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Option Explicit '定义查询字段的窗体级变量 '定义查询的字段窗体变量 Dim sfield As String '查询的关键词 Dim seachtext As String '查询函数定义 '1、桉书号查询则采用具体查询办法 '2、按书名查询则采用模糊查询办法 Function open_seach(table_name As String, sfield As String, seachtext As String) As Integer Dim sqlstr As String Dim str As String '建立数据库连接 Set con = New ADODB.Connection Set rst = New ADODB.Recordset con.CursorLocation = adUseClient sqlstr = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + App.Path + "\data\ComputerBookmanage.mdb" + ";Persist Security Info=False" con.Open sqlstr ' 查询办法选择 If Option1.Value = True Then str = "select * from " & table_name & " where " & sfield & "='" & seachtext & "'" Else str = "select * from " & table_name & " where " & sfield & " like '" & Trim(" %" & Text1.Text & "%") & "'" End If If Option3.Value = True Then str = "select * from " & table_name & " where " & sfield & "='" & seachtext & "'" Else str = "select * from " & table_name & " where " & sfield & " like '" & Trim(" %" & Text1.Text & "%") & "'" End If rst.Open str, con, adOpenDynamic, adLockOptimistic rst.Requery If rst.RecordCount > 0 Then open_seach = 1 '返回一个值1,代表有查询结果 Else open_seach = 0 '返回一个值0,代表没有查询结果 End If End Function Private Sub Check4_Click() '选择查询的字段 Select Case TabStrip1.SelectedItem Case "图书信息浏览": sfield = "[出版社]" End Select End Sub Private Sub Command1_Click() If rst.BOF = True Then frmMsg.Show frmMsg.info.Visible = True frmMsg.Text1.Text = "已经到达第一条记录了！" Exit Sub Else rst.MovePrevious End If End Sub Private Sub Command2_Click() '后一记录 If rst.EOF = True Then frmMsg.Show frmMsg.info.Visible = True frmMsg.Text1.Text = "已经到达最后一条记录了！" Exit Sub Else rst.MoveNext End If End Sub Private Sub DataGrid2_Click() Call connect_db open_connection ("book") '连接book表 tablename = "book" If privilege = 1 Then '如果只是普通用户,无法查询员工信息 frmMsg.Show frmMsg.error.Visible = True frmMsg.Text1.Text = "对不起，您没有查阅的权限！" Exit Sub End If open_connection ("worker") '连接worker表 tablename = "worker" open_connection ("record") '连接record表 tablename = "record" Set DataGrid1.DataSource = rst End Sub Private Sub Command4_Click() Dim ret As Integer If Command4.Caption = "查 询" Then Command4.Caption = "确 定" Else If Option1.Value = False And Option2.Value = False And Option3.Value = False And Option4.Value = False Then frmMsg.Show frmMsg.notice.Visible = True frmMsg.Text1.Text = "请选择查询项!" Exit Sub End If If Text1.Text = "" Then frmMsg.Show frmMsg.notice.Visible = True frmMsg.Text1.Text = "请输入查询内容！" Text1.SetFocus Exit Sub End If seachtext = Trim(Text1.Text) ret = open_seach(tablename, sfield, seachtext) If ret = 0 Then frmMsg.Show frmMsg.error.Visible = True frmMsg.Text1.Text = "对不起，没有你要的记录!" Option1.Value = False Option2.Value = False Text1.Text = "" rst.Close Set rst = Nothing Set DataGrid1.DataSource = rst Command1.Enabled = False '上一条,下一条按钮为灰 Command2.Enabled = False Command4.Caption = "查 询" Exit Sub End If Command1.Enabled = True Command2.Enabled = True Set DataGrid1.DataSource = rst Text1.Text = "" Option1.Value = False Option2.Value = False Command4.Caption = "查 询" End If End Sub Private Sub DataGrid1_Click() Call connect_db open_connection ("book") '连接book表 tablename = "book" If privilege = 1 Then '如果只是普通用户,无法查询员工信息 frmMsg.Show frmMsg.error.Visible = True frmMsg.Text1.Text = "对不起，您没有查阅的权限！" Exit Sub End If open_connection ("worker") '连接worker表 tablename = "worker" open_connection ("record") '连接record表 tablename = "record" Set DataGrid1.DataSource = rst End Sub Private Sub Form_Load() Option1.Caption = "书号" Option2.Caption = "书名" Option3.Caption = "出版社" Option4.Caption = "作者" Label2.Caption = frmLogin.Text1.Text Timer1.Interval = 1000 tablename = "book" Call connect_db open_connection ("book") Set DataGrid1.DataSource = rst TabStrip1.Tabs.Item(1) = "图书信息浏览" TabStrip1.Tabs.Item(2) = "员工信息浏览" TabStrip1.Tabs.Item(3) = "图书借阅情况浏览" Text1.Text = "" open_connection ("book") Set DataGrid1.DataSource = rst frmLogin.Show End Sub Private Sub Image1_Click() End Sub Private Sub Option1_Click() Select Case TabStrip1.SelectedItem Case "图书信息浏览": sfield = "[图书编码]" Case "员工信息浏览": sfield = "[工号]" Case "图书借阅情况浏览": sfield = "[图书编码]" End Select End Sub Private Sub Option2_Click() '选择查询的字段 Select Case TabStrip1.SelectedItem Case "图书信息浏览": sfield = "[图书名称]" Case "员工信息浏览": sfield = "[姓名]" Case "图书借阅情况浏览": sfield = "[工号]" End Select End Sub Private Sub Option3_Click() '选择查询的字段 Select Case TabStrip1.SelectedItem Case "图书信息浏览": sfield = "[出版社]" End Select End Sub Private Sub Option4_Click() '选择查询的字段 Select Case TabStrip1.SelectedItem Case "图书信息浏览": sfield = "[作者]" End Select End Sub Private Sub Text2_Change() Text1.Text = Time End Sub Private Sub TabStrip1_Click() Call connect_db Select Case TabStrip1.SelectedItem Case "图书信息浏览": open_connection ("book") '连接book表 tablename = "book" Option1.Caption = "书号" Option2.Caption = "书名" Set DataGrid1.DataSource = rst Case "员工信息浏览": If privilege = 1 Then '如果只是普通用户,无法查询员工信息 frmMsg.Show frmMsg.error.Visible = True frmMsg.Text1.Text = "对不起，您没有查阅的权限！" Exit Sub End If open_connection ("worker") '连接worker表 Option1.Caption = "工号" Option2.Caption = "姓名" tablename = "worker" Set DataGrid1.DataSource = rst Case "图书借阅情况浏览": open_connection ("record") '连接record表 Option1.Caption = "书号" Option2.Caption = "工号" tablename = "record" Set DataGrid1.DataSource = rst End Select End Sub Private Sub Timer1_Timer() Label3.Caption = Now End Sub Private Sub xpcmdbutton1_Click() Form4.Show End Sub Private Sub xpcmdbutton12_Click() Form6.Show End Sub Private Sub xpcmdbutton13_Click() frmAbout.Show End Sub Private Sub xpcmdbutton14_Click() Unload Me frmLogin.Show End Sub Private Sub xpcmdbutton15_Click() open_connection "reader" tablename = "reader" Set DataGrid1.DataSource = rst End Sub Private Sub xpcmdbutton2_Click() Form5.Show End Sub Private Sub xpcmdbutton3_Click() Form2.Show End Sub Private Sub xpcmdbutton4_Click() Form3.Show End Sub Private Sub xpcmdbutton5_Click() open_connection ("book") tablename = "record" Set DataGrid1.DataSource = rst End Sub Private Sub xpcmdbutton6_Click() open_connection ("record") tablename = "record" Set DataGrid1.DataSource = rst End Sub Private Sub xpcmdbutton7_Click() open_connection ("worker") tablename = "worker" Set DataGrid1.DataSource = rst End Sub Private Sub xpcmdbutton8_Click() Frm_sys_set.Show End Sub Private Sub xpmin_Click() Me.WindowState = 1 End Sub Private Sub xpclose_Click() Unload Me frmLogin.Show End Sub Private Sub xptopbuttons1_Click() Unload Me End S