与各数据库的几种连接方式

1、、用DAO控件连接数据库1.与Access2000数据库连接Private Sub Command1_Click()'也可直接在控件属性中设置以下各项但在控件属性中不能写入密码'只有在数据数没有密码的情况下可以省略Data1.Refresh Data1.Connect = "Access 2000;"Data1.DatabaseName = App. Path + "chncmadb.mdb"'数据库没有密码此句可省Data1.Connect = "pwd=123456"'Data1.RecordSou

2、rce = "耕地资源管理单元属性数据表2004"Data1.RecordSource = "select * from 耕地资源管理单元属性数据表2004"Data1.Refreshmove后才能正确显示记录个数End Sub2.与没有密码的DBF文件数据库连接Private Sub Command2_Click()Data1.Connect = "dBASE III;"Data1.DatabaseName = App. Path' Data1.RecordSource ="DBF" Data1.Reco

3、rdSource = "select * from dbf"Data1.Refreshmove后才能正确显示记录个数End Sub3.与没有密码的Excel文件数据库连接Private Sub Command3_Click()Data1.Connect = "Excel 8.0;"Data1.DatabaseName = App.Path & "EXcel.xls"Data1.RecordSource = "select * from EXcel.xls"Data1.Refreshmove后才能正确显示记录

4、个End Sub二、用DAO代码连接数据库'在使用DAO对象前应选定Visual Basic菜单下的工程中的引用了菜单中的Microsoft DAO 3.6 Object Library选项，或其它版本1.DAO代码与Access数据库连接Private Sub Command1_Click()Dim Db As DatabaseDim Rs As Recordset'以共享、读写方式打开'如果无密码最后一个参数可以不要SetDb= OpenDatabase(App.Path & "chncmadb.mdb", False, False, &

5、quot;pwd=123456") '不需要move来更新记录个数 'Set Rs = Db.OpenRecordset("耕地资源管理单元属性数据表2004") '需要move来更新记录个数Set Rs = Db.OpenRecordset("select * from 耕地资源管理单元属性数据表2004") If Rs.RecordCount > 0 Then Rs.MoveLast Rs.MoveFirstEnd IfEnd Sub2.DAO代码与没有密码的DBF文件数据库连接Private Sub Comm

6、and2_Click()Dim Db As DatabaseDim Rs As Recordset'以共享、读写方式打开Set Db = OpenDatabase(App.Path, False, False, "dbase III;") '不需要move来更新记录个数'Set Rs = Db.OpenRecordset("DBF") 需要move来更新记录个数 Set Rs = Db.OpenRecordset("select * from DBF") If Rs.RecordCount > 0 The

7、n Rs.MoveLast Rs.MoveFirstEnd IfEnd sub3. 'DAO代码与没有密码的Excel文件数据库连接Private Sub Command3_Click()Dim Db As DatabaseDim Rs As Recordset'以共享、读写方式打开'如果无密码最后一个参数可以不要Set Db = OpenDatabase(App.Path & "EXcel.xls", False, False, "Excel 8.0;")'不需要move来更新记录个数 ' Set Rs

8、= Db.OpenRecordset("EXcel.xls") '表格中的工作目录sheet '需要move来更新记录个数Set Rs = Db.OpenRecordset("select * from EXcel.xls") '表格中的工作目录sheet' If Rs.RecordCount > 0 Then Rs.MoveLast Rs.MoveFirstEnd IfEnd Sub三、用ADO控件连接数据库'也可直接在控件属性中设置以下各项1.ADO控件与Access2000数据库连接Private Su

9、b Command1_Click() '连接有密码的Access数据库 'Adodc1.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "chncmadb1.mdb;Jet OLEDB:DataBase PASSWORD=123456" '连接没有密码的Access数据库 Adodc1.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Da

10、ta Source=" & App.Path & "chncmadb.mdb;Persist Security Info=False" 'Adodc1.RecordSource = "耕地资源管理单元属性数据表2004" Adodc1.RecordSource = "select * from 耕地资源管理单元属性数据表2004" Adodc1.Refresh Set DataGrid1.DataSource = Adodc1 DataGrid1.RefreshEnd Sub2.'ADO控件与

11、DBF表连接Private Sub Command2_Click() 'Adodc1.ConnectionString = "Provider=MSDASQL.1;Persist Security Info=False;Data Source=dBASE Files;DBQ=" & App.Path & "SourceType=DBF;" 'Adodc1.ConnectionString = "Provider=MSDASQL.1;Persist Security Info=False;Extended Prop

12、erties=DSN=Visual FoxPro Tables;UID=;SourceDB=”& app.path &”;SourceType=DBF;Exclusive=No;BackgroundFetch=Yes;Collate=Machine;Null=Yes;Deleted=Yes;" 'Adodc1.ConnectionString = "Provider=MSDASQL.1;Persist Security Info=False;Extended Properties=DSN=dBASE Files;DBQ=”& app.path

13、 &”;DefaultDir=”& app.path &”;DriverId=533;MaxBufferSize=2048;PageTimeout=5;" '能使表名长度不受限制 Adodc1.ConnectionString = "Provider=MSDASQL.1;Driver=Microsoft Visual Foxpro Driver;SourceDB=" & App.Path & "SourceType=DBF;Locale Identifier=2052" 'Adodc1.R

14、ecordSource = "DBF1" Adodc1.RecordSource = "select * from DBF1" Adodc1.Refresh Set DataGrid1.DataSource = Adodc1 DataGrid1.RefreshEnd Sub3.'ADO控件与Excel表连接Private Sub Command3_Click() '下面一句测试未能通过 'Adodc1.ConnectionString = "Data Provider=MSDASQL.1;driver=Microsoft

15、 Excel Driver *.xls);DBQ=" & App.Path & "EXcel.xls" 'Adodc1.ConnectionString="Provider=MSDASQL.1;Persist Security Info=False;Extended Properties=DSN=Excel Files;DBQ=" & App.Path & "EXcel.xls;DefaultDir=”&app.path &”;DriverId=790;MaxBufferSize

16、=2048;PageTimeout=5;" Adodc1.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;Data Source=" & App.Path & "EXcel.xls;Extended Properties='Excel 8.0;HDR=Yes'" 'Adodc1.RecordSource = "EXcel.xls" Adodc1.RecordSource =

17、 "select * from EXcel.xls" Adodc1.Refresh Set DataGrid1.DataSource = Adodc1 DataGrid1.RefreshEnd Sub4.'ADO控件与Oracle数据库连接Private Sub Command4_Click() 'Adodc1.ConnectionString = "Provider=MSDAORA.1;Password=chncmadb;User ID=chncmadb;Data Source=towebserver;Persist Security Info=

18、True"Adodc1.ConnectionString="Provider=OraOLEDB.Oracle.1;Password=chncmadb;Persist Security Info=True;User ID=chncmadb;Data Source=towebserver" 'Adodc1.RecordSource = "T320481TR012004" '表名不能加方括号 Adodc1.RecordSource = "select * from T320481TR012004" Adodc1.R

19、efresh Set DataGrid1.DataSource = Adodc1 DataGrid1.RefreshEnd Sub5.'ADO控件与SQLserver数据库连接'未测试Private Sub Command5_Click() Adodc1.ConnectionString = "Provider=SQLOLEDB.1;Password=111;Persist Security Info=True;User ID=111;Initial Catalog=111;Data Source=111" 'Adodc1.RecordSource

20、= "T320481TR012004" Adodc1.RecordSource = "select * from T320481TR012004" Adodc1.Refresh Set DataGrid1.DataSource = Adodc1 DataGrid1.RefreshEnd Sub四、用ADO代码连接数据库'在使用ADO对象前应选定Visual Basic菜单下的工程中的引用了菜单中的Microsoft.ActiveX Data Object 2.5 Library选项，或其它版本1.'ADO代码与Access2000数据库连

21、接Private Sub Command1_Click() Dim AdoCnn As ADODB.Connection Dim AdoRs As ADODB.Recordset Set AdoCnn = New ADODB.Connection Set AdoRs = New ADODB.Recordset AdoCnn.CursorLocation = adUseClient '.open后面的字符串可以参考ADO控件连接.ConnectionString后面的的字符串 AdoCnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data

22、Source=" & App.Path & "chncmadb1.mdb;Jet OLEDB:DataBase PASSWORD=123456"AdoRs.Open "select * from 耕地资源管理单元属性数据表2004", AdoCnn, adOpenDynamic, adLockPessimistic, adCmdText Set DataGrid1.DataSource = AdoRs Set AdoRs = Nothing Set AdoCnn = NothingEnd Sub2.'ADO代码与DBF表

23、连接Private Sub Command2_Click() Dim AdoCnn As ADODB.Connection Dim AdoRs As ADODB.Recordset Set AdoCnn = New ADODB.Connection Set AdoRs = New ADODB.Recordset AdoCnn.CursorLocation = adUseClient '.open后面的字符串可以参考ADO控件连接.ConnectionString后面的的字符串 AdoCnn.Open "Provider=MSDASQL.1;Driver=Microsoft V

24、isual Foxpro Driver;SourceDB=" & App.Path & "SourceType=DBF;Locale Identifier=2052"AdoRs.Open "select * from DBF1", AdoCnn, adOpenDynamic, adLockPessimistic, adCmdText Set DataGrid1.DataSource = AdoRs Set AdoRs = Nothing Set AdoCnn = NothingEnd Sub3.'ADO代码与Excel表

25、连接Private Sub Command3_Click() Dim AdoCnn As ADODB.Connection Dim AdoRs As ADODB.Recordset Set AdoCnn = New ADODB.Connection Set AdoRs = New ADODB.Recordset AdoCnn.CursorLocation = adUseClient '.open后面的字符串可以参考ADO控件连接.ConnectionString后面的的字符串 AdoCnn.Open"Provider=Microsoft.Jet.OLEDB.4.0;Persi

26、st Security Info=False;Data Source=" & App.Path & "EXcel.xls;Extended Properties='Excel 8.0;HDR=Yes'"AdoRs.Open "select * from EXcel.xls", AdoCnn, adOpenDynamic, adLockPessimistic, adCmdText Set DataGrid1.DataSource = AdoRs Set AdoRs = Nothing Set AdoCnn = NothingEnd Sub4.'ADO代码与Oracle数据库连接Private Sub Command4_Click() Dim AdoCnn As ADODB.Connection Dim AdoRs As ADODB.Recordset Set AdoCnn = New ADODB.Connection Set AdoRs = New ADODB.Recordset AdoCnn.CursorLocation = adUseClient '.open后面的字符串可以参考ADO控件连接.ConnectionString后面的的字符串 AdoCnn.Open "