|
希望高手帮忙把以下代码修改成 FOXPRO ODBC DNS文件,谢谢!
文章来源: http://www.accessoft.com/article-show.asp?id=1745
一般我们建立 Client 端 DSN 都是在使用者的机器上进入【控制台】【ODBC 资料来源管理员】去建立,但是如果我们开发的 APP 使用者很多时,这就有点累人了,所以我们可以将这个动作放在程序中!
新增 DSN 的方法有二种:
1、使用 DBEngine 物件的 RegisterDatabase 方法
2、呼叫 SQLConfigDataSource API
不管使用以上任何一种方法新增 DSN,一共会写入二个地方,一个是注册表,一个是 ODBC.INI。
而删除 DSN 的方法同上面的第二种方法,呼叫 SQLConfigDataSource API。
以下之模组以 Oracle73 Ver 2.5 为例,在 Form 的声明区中加入以下声明及模组:
Private Const ODBC_ADD_DSN = 1 ′ Add data source
Private Const ODBC_CONFIG_DSN = 2 ′ Configure (edit) data source
Private Const ODBC_REMOVE_DSN = 3 ′ Remove data source
Private Const vbAPINull As Long = 0& ′ NULL Pointer
Private Declare Function SQLConfigDataSource Lib "ODBCCP32.DLL" _
(ByVal hwndParent As Long, ByVal fRequest As Long, _
ByVal lpszDriver As String, ByVal lpszAttributes As String) As Long
Public Sub CreateDSN(sDSN As String)
Dim nRet As Long
Dim sDriver As String
Dim sAttributes As String
sDriver = "Oracle73 Ver 2.5"
sAttributes = "Server=Oracle8" & Chr$(0)
sAttributes = sAttributes & "DESCRIPTION=" & sDSN & Chr$(0)
′sAttributes = sAttributes & "DSN=" & sDSN & Chr$(0)
sAttributes = sAttributes & "DATABASE=DBFinance" & Chr$(0)
sAttributes = sAttributes & "Userid=Scott" & Chr$(0)
′sAttributes = sAttributes & "PWD=myPassword" & Chr$(0)
DBEngine.RegisterDatabase sDSN, sDriver, True, sAttributes ′注一
′nRet = SQLConfigDataSource(vbAPINull, ODBC_ADD_DSN, sDriver, sAttributes) ′注二
End Sub
Public Sub DeleteDSN(sDSN As String)
Dim nRet As Long
Dim sDriver As String
Dim sAttributes As String
sDriver = "Oracle73 Ver 2.5"
sAttributes = sAttributes & "DSN=" & sDSN & Chr$(0)
nRet = SQLConfigDataSource(vbAPINull, ODBC_REMOVE_DSN, sDriver, sAttributes)
End Sub
′假设要产生的 DSN 为 Test,实际使用范例如下:
Private Sub Command1_Click()
CreateDSN "Test"
End Sub
Private Sub Command2_Click()
DeleteDSN "Test"
End Sub
′而写到系统的资料如下:
1、ODBC.INI
[ODBC 32 bit Data Sources]
Test=Oracle73 Ver 2.5 (32 bit)
[Test]
Driver32=C:\ORAWIN95\ODBC250\sqo32_73.dll
2、注册表
机码:HKEY_CURRENT_USER\Software\ODBC\ODBC.INI\ODBC Data Sources
名称:Test 资料:Oracle73 Ver 2.5
机码:HKEY_CURRENT_USER\Software\ODBC\ODBC.INI\Test
名称:Description 资料:Test
名称:Driver 资料:C:\ORAWIN95\ODBC250\sqo32_73.dll
名称:Server 资料:Oracle8
名称:UserId 资料:Scott
|
|