服务器 频道

一组SQL Server身份验证管理子程序

  '' 设置打开 ADP 程序的参数
  srvname = "(local)"
  dbname = "NorthwindCS" '' ADP 连接的数据库
  prpath = "C:\Documents and Settings\Administrator\My Documents\"  '' ADP 文件所在的磁盘位置
  prname = "NorthwindCS" '' ADP 文件名
  suid = "msdn5"
  pwd = "password"
  
  '' 该参数用于控制当前用户使用 Windows 登录
  '' 代替 SQL Server 的 suid 和 pwd
  bolWindowsLogin = False
  
  '' 使用 Windows 或 SQL Server 登录调用打开名为 prname ADP 的子程序
  OpenADPWindowsOrSQLServer srvname, dbname, prpath, prname, suid, pwd, bolWindowsLogin
End Sub

Sub OpenADPWindowsOrSQLServer(srvname As String, dbname As String, _
  prpath As String, prname As String, _
  suid As String, pwd As String, bolWindowsLogin As Boolean)

  Dim bolLeaveOpen As Boolean
  Dim strPrFilePath As String
  Dim sConnectionString As String
  
  '' 是否保持现有打开的程序?
  If MsgBox("在该过程中是否关闭打开的 ADP?", vbYesNo) = vbYes Then
    bolLeaveOpen = True
  End If
  
  '' 新建 Access 会话实例 (使用 .9 : Access 2000, .10 : Access 2002)
  Set appAccess = CreateObject("Access.Application.9")
  
  '' 使用登录名和口令打开 ADP 并使其可视
  strPrFilePath = prpath & prname
  appAccess.OpenAccessProject strPrFilePath
  appAccess.Visible = True
  
  '' 指定 ADP 使用的新的 Windwos 或 SQL Server 登录方式
  If bolWindowsLogin Then
    appAccess.CurrentProject.OpenConnection _
      "PROVIDER=SQLOLEDB.1;INTEGRATED SECURITY=SSPI;" & _
      "PERSIST SECURITY INFO=FALSE;INITIAL CATALOG=" & _
      dbname & ";DATA SOURCE=" & srvname
  Else
    sConnectionString = "PROVIDER=SQLOLEDB.1;INITIAL CATALOG=" & _
      dbname & ";DATA SOURCE=" & srvname
    appAccess.CurrentProject.OpenConnection _
      sConnectionString, _
      suid, pwd
  End If
  
  '' 按上面提出的要求关闭 Access 会话实例
  If bolLeaveOpen = False Then
    appAccess.CloseCurrentDatabase
    Set appAccess = Nothing
  End If
End Sub

Sub CallLoginDemo()
  Dim srvname As String
  Dim suid As String
  Dim pwd As String
  
  '' 设置登录 SQL Server 的参数
  srvname = "(local)"
  suid = "sa"
  pwd = ""
  
  '' 调用 SQL Server 登录子程序
  LoginDemo srvname, suid, pwd
End Sub


Sub LoginDemo(srvname As String, suid As String, pwd As String)
  Dim srv1 As SQLDMO.SQLServer
  Dim lgn1 As SQLDMO.Login
  
  '' 新建一服务器实例
  Set srv1 = New SQLDMO.SQLServer
  
  '' 以 SQL Server 方式连接 SQL Server
  srv1.Connect srvname, suid, pwd
  
  '' 新建登录对象
  Set lgn1 = New SQLDMO.Login
  
  '' 添加默认 SQL Server 登录 msdn6
  lgn1.Name = "UserX"
  lgn1.Database = "NorthwindCS"
  lgn1.SetPassword "", "password"
  srv1.Logins.Add lgn1
  
  ''重新新建登录对象
  Set lgn1 = New SQLDMO.Login
  
  '' 添加基于 Windows 组 SQL_users 的登录对象
  lgn1.Name = "MYDESK\UserSQL"
  lgn1.Database = "NorthwindCS"
  lgn1.Type = SQLDMOLogin_NTGroup
  srv1.Logins.Add lgn1
  
  '' 在添加登录后,列出登录列表
  Debug.Print "添加 2 个新登录后的登录列表:"
  For Each lgn1 In srv1.Logins
    Debug.Print DecodeLoginType(lgn1.Type), lgn1.Name
  Next lgn1
  
  '' 删除刚新建的登录
  srv1.Logins.Remove "MYDESK\UserSQL"
  srv1.Logins.Remove "UserX"
  
  '' 列出登录列表
  Debug.Print vbCr & "删除 2 个新登录后的登录列表:"
  For Each lgn1 In srv1.Logins
    Debug.Print DecodeLoginType(lgn1.Type), lgn1.Name
  Next lgn1
  
  '' 断开连接
  srv1.Disconnect
  Set srv1 = Nothing
End Sub


Function DecodeLoginType(lgn_type As Byte) As String

  Select Case lgn_type
    Case 0
      DecodeLoginType = "SQLDMOLogin_NTUser"
    Case 1
      DecodeLoginType = "SQLDMOLogin_NTGroup"
    Case 2
      DecodeLoginType = "SQLDMOLogin_Standard"
    Case Else
      DecodeLoginType = "超出范围"
  End Select

End Function

Sub MakeLoginWithDatareaderUser()
  Dim srv1 As SQLDMO.SQLServer
  Dim lgn1 As SQLDMO.Login
  Dim usr1 As SQLDMO.User
  Dim srvname As String
  Dim suid As String
  Dim pwd As String
  Dim dbname As String
  Dim prpath As String
  Dim prname As String
  Dim bolWindowsLogin As Boolean
  
  '' 设置参数
  srvname = "(local)"
  suid = "sa"
  pwd = ""
  dbname = "NorthwindCS"
  
  '' 新建服务器实例
  Set srv1 = New SQLDMO.SQLServer
  
  '' 以 SQL Server 登录方式进行连接
  srv1.Connect srvname, suid, pwd
  
  '' 新建一个 SQL Server 登录对象 UserX
  suid = "UserX"
  Set lgn1 = New SQLDMO.Login
  lgn1.Name = suid
  lgn1.Database = dbname
  lgn1.SetPassword "", pwd
  srv1.Logins.Add lgn1
  
  '' 在数据库 NorthwindCS 上新建一个用户对象 UserX,并与登录对象 UserX 相关联
  Set usr1 = New SQLDMO.User
  usr1.Name = suid
  usr1.Login = lgn1.Name
  srv1.Databases(dbname).Users.Add usr1
  srv1.Databases(dbname).DatabaseRoles("db_datareader").AddMember usr1.Name
  
  '' 设置调用 ADP 的子程序参数
  prpath = "C:\Documents and Settings\Administrator\My Documents\"
  prname = "NorthwindCS"
  
  '' 该参数用于控制当前用户使用 Windows 登录
  '' 代替 SQL Server 的 suid 和 pwd
  bolWindowsLogin = False
  
  '' 使用 Windows 或 SQL Server 登录调用打开名为 prname ADP 的子程序
  OpenADPWindowsOrSQLServer srvname, dbname, prpath, prname, suid, pwd, bolWindowsLogin
End Sub


Sub CleanUpAfterMakeLoginWithDAtaReader()
  Dim srv1 As New SQLDMO.SQLServer
  
  srv1.Connect "(local)", "sa", ""
  
  srv1.Databases("NorthwindCS").Users.Remove "UserX"
  srv1.Logins.Remove "UserX"
End Sub
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