VB6连接各种类型的数据库

一、连接VFP数据库

Dim CNN As New ADODB.Connection
Dim rssys As New ADODB.Recordset
If CNN.state = 1 Then CNN.Close
CNN.ConnectionString = "Driver={Microsoft Visual FoxPro Driver};SourceType=.DBc;SourceDb=" + Trim(Text1)
CNN.Open
If CNN.state = 1 Then
rssys.CursorLocation = adUseClient
rssys.Open "select * from sys ", CNN, adOpenDynamic, adLockReadOnly
End If

二、连接Ms SQL数据库

Dim CNN As New ADODB.Connection
If loginid = 0 Then
CNN.ConnectionString = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=RongShiYKT;Data Source=" & Trim(sqlserver)
ElseIf loginid = 1 Then
CNN.ConnectionString = "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;pwd=123456;Initial Catalog=RongShiYKT" & ";Data Source=" & Trim(sqlserver)
End If
CNN.Mode = adModeShareDenyNone
CNN.CommandTimeout = 0
CNN.Open
Dim cmd As New ADODB.Command
Set cmd.ActiveConnection = cn
cmd.CommandType = adCmdStoredProc
cmd.CommandText = "DealMealData"
cmd.Parameters(1) = rscx.Fields("ID")
cmd.Execute

三、连接Access数据库

Dim CNN As New ADODB.Connection
CNN.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source= " & App.Path & "\Elevator.mdb;Persist Security Info=true;Jet OLEDB:Database Password=123456"
If CNN.State = 1 Then CNN.Close
CNN.Open

四、连接MySql数据库

Dim CNN As New ADODB.Connection
Dim mysqlstor As New ADODB.Command
CNN.ConnectionString = " DRIVER={MySQL ODBC 5.2 unicode Driver};" & "SERVER=" & hostserver & "; DATABASE=" & dbserver & ";UID=" & user & ";PWD=" & pwd & "; OPTION=3"
If CNN.State = 1 Then CNN.Close
CNN.Open
CREATE DEFINER=`rsadmin`@`%` PROCEDURE `Stor_Add_Cust`(IN Cust0 varchar(60) character set gbk,
IN Cont1 varchar(20) character set gbk,
IN Mobi2 varchar(15) character set gbk,
IN Tel3 varchar(15) character set gbk,
IN Fax4 varchar(15) character set gbk,
IN QQ5 varchar(15) character set gbk,
IN Addr6 varchar(80) character set gbk,
IN ShopA7 varchar(60) character set gbk,
IN ShopT8 varchar(15) character set gbk,
IN ShopF9 varchar(15) character set gbk,
IN Email10 varchar(30) character set gbk,
IN Area111 varchar(18) character set gbk,
IN Rema12 varchar(80) character set gbk,
IN User13 int,
IN Remind14 varchar(250) character set gbk,
IN WebId15 int,
OUT KHBHStr varchar(10),OUT CustId int)
BEGIN /* 增加一个新客户*/
select max(custoCode) into @xfdh from customer;
set @xfdh= LPAD(right( @xfdh,6)+1,10,'KHBH0000000000');
set KHBHStr=@xfdh;
if not isnull(Cust0) then
Insert into Customer(CustoCode,CustoName,AreaCode,Mobile,Address,Fax,Contact,Tel,QQ,Remark,ShopAdd,ShopTel,ShopFax,E_MAIL,inputdate,UserID,Remind,WebstaId) values(@xfdh,Cust0,Area111,Mobi2,Addr6,Fax4,Cont1,Tel3,QQ5 ,Rema12,ShopA7,ShopT8,ShopF9,Email10,sysdate(),User13,Remind14,WebId15);
select Id into CustId from customer where CustoCode=@xfdh;
end if;
END;
mysqlstor.ActiveConnection = CNN
mysqlstor.CommandText = "Stor_Add_Cust"
mysqlstor.CommandType = adCmdStoredProc
mysqlstor.Prepared = True
mysqlstor.Parameters(0) = Trim(Text4.Text)
mysqlstor.Parameters(1) = Trim(Text6.Text)
mysqlstor.Parameters(2) = Trim(Text12.Text)
mysqlstor.Parameters(3) = Trim(Text3.Text)
mysqlstor.Parameters(4) = Trim(Text2.Text)
mysqlstor.Parameters(5) = Trim(Text11.Text)
mysqlstor.Parameters(6) = Trim(Text5.Text)
mysqlstor.Parameters(7) = Trim(Text13.Text)
mysqlstor.Parameters(8) = Trim(Text15.Text)
mysqlstor.Parameters(9) = Trim(Text14.Text)
mysqlstor.Parameters(10) = Trim(Text7.Text)
mysqlstor.Parameters(11) = selnewbm
mysqlstor.Parameters(12) = Trim(Text8.Text)
mysqlstor.Parameters(13) = czyid
mysqlstor.Parameters(14) = Trim(Text16.Text)
mysqlstor.Parameters(15) = Val(Mid(Combo4.Text, 1, 3))
mysqlstor.Parameters(16) = ""
mysqlstor.Parameters(17) = 0
mysqlstor.Execute
dwbh = mysqlstor.Parameters(16)
selekhid = mysqlstor.Parameters(16)
selcustid = mysqlstor.Parameters(17)
sqlstr = "call Stor_InOutMat('" & selck & "'," & Val(Label20.Caption) & "," & Val(Text10) & ",'" & czymc & "','" & Trim(Text11) & "'," & czyid & ")"
CNN.Execute sqlstr

五、连接Oracle数据库

Dim CNN As New ADODB.Connection
CNN.ConnectionString = "Driver={Microsoft ODBC for Oracle};Server=SvrName;UID=UserID;PWD=Password;"
If CNN.State = 1 Then CNN.Close
CNN.Open

六、通过.udl通用数据连接文件连接数据库

Dim cn As New ADODB.Connection
cn.ConnectionString = "File Name=" & App.Path & "\ConnectDatabase.udl;"
cn.Mode = adModeShareDenyNone
cn.CommandTimeout = 0
cn.Open

七、编辑修改.udl通用数据连接文件

Dim s As String
Dim filename As String
Dim BytesBuffer() As Byte
Dim i As Long
filename = App.Path & "\ConnectDatabase.udl"
On Error Resume Next
s = "[oledb]" & vbCrLf & "; Everything after this line is an OLE DB initstring" & vbCrLf & "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;User ID=sa;Initial Catalog=master;Data Source=(local)" & vbCrLf
BytesBuffer = VBA.StrConv(VBA.StrConv(s, vbUnicode), vbFromUnicode)
ReDim BytesBuffer0(1) As Byte
BytesBuffer0(0) = 255
BytesBuffer0(1) = 254
If VBA.Len(VBA.Trim(VBA.Dir(filename))) > 0 Then
DeleteFile filename
End If
i = VBA.FreeFile
Open filename For Binary Access Write As #i
Put #i, , BytesBuffer0
Put #i, , BytesBuffer
Close #i