.NET中的ODBC驱动程序列表

Question

有没有办法从.NET中获取安装在Windows XP机器上的ODBC驱动程序列表？

我基本上希望看到（在.NET）是什么：

控制面板 - >管理工具 - >数据源（ODBC） - > “驱动程序” 选项卡 。

Answer 1

见this或this

基本上这里系统存储的ODBC驱动程序的信息 HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBCINST.INI\ODBC Drivers

您可以使用此或类似的代码，找出所安装的ODBC驱动程序。此代码基本上读取来自注册表的驱动程序信息

public static List<String> GetSystemDriverList() 
     { 
      List<string> names = new List<string>(); 
      // get system dsn's 
      Microsoft.Win32.RegistryKey reg = (Microsoft.Win32.Registry.LocalMachine).OpenSubKey("Software"); 
      if (reg != null) 
      { 
       reg = reg.OpenSubKey("ODBC"); 
       if (reg != null) 
       { 
        reg = reg.OpenSubKey("ODBCINST.INI"); 
        if (reg != null) 
        { 

         reg = reg.OpenSubKey("ODBC Drivers"); 
         if (reg != null) 
         { 
          // Get all DSN entries defined in DSN_LOC_IN_REGISTRY. 
          foreach (string sName in reg.GetValueNames()) 
          { 
           names.Add(sName); 
          } 
         } 
         try 
         { 
          reg.Close(); 
         } 
         catch { /* ignore this exception if we couldn't close */ } 
        } 
       } 
      } 

      return names; 
     } 

Answer 2

没有必要打开每个中间子项。读取注册表项，以获得ODBC驱动程序名称可以在更紧凑的方式进行如下：

/// <summary> 
    /// Gets the ODBC driver names from the registry. 
    /// </summary> 
    /// <returns>a string array containing the ODBC driver names, if the registry key is present; null, otherwise.</returns> 
    public static string[] GetOdbcDriverNames() 
    { 
     string[] odbcDriverNames = null; 
     using (RegistryKey localMachineHive = Registry.LocalMachine) 
     using (RegistryKey odbcDriversKey = localMachineHive.OpenSubKey(@"SOFTWARE\ODBC\ODBCINST.INI\ODBC Drivers")) 
     { 
      if (odbcDriversKey != null) 
      { 
       odbcDriverNames = odbcDriversKey.GetValueNames(); 
      } 
     } 

     return odbcDriverNames; 
    } 

您也可以通过执行在P实现的功能/ Invoke来SQLGetInstalledDriversW：

[DllImport("odbccp32.dll", CharSet = CharSet.Unicode, SetLastError = true)] 
    private static extern bool SQLGetInstalledDriversW(char[] lpszBuf, ushort cbufMax, out ushort pcbBufOut); 

    /// <summary> 
    /// Gets the ODBC driver names from the SQLGetInstalledDrivers function. 
    /// </summary> 
    /// <returns>a string array containing the ODBC driver names, if the call to SQLGetInstalledDrivers was successfull; null, otherwise.</returns> 
    public static string[] GetOdbcDriverNames() 
    { 
     string[] odbcDriverNames = null; 
     char[] driverNamesBuffer = new char[ushort.MaxValue]; 
     ushort size; 

     bool succeeded = SQLGetInstalledDriversW(driverNamesBuffer, ushort.MaxValue, out size); 

     if (succeeded == true) 
     { 
      char[] driverNames = new char[size - 1]; 
      Array.Copy(driverNamesBuffer, driverNames, size - 1); 
      odbcDriverNames = (new string(driverNames)).Split('\0'); 
     } 

     return odbcDriverNames; 
    } 

我也调用函数和使用结果如下创建ODBC数据源时正常降级到SQL驱动程序的早期版本：

/// <summary> 
    /// Gets the name of an ODBC driver for Microsoft SQL Server giving preference to the most recent one. 
    /// </summary> 
    /// <returns>the name of an ODBC driver for Microsoft SQL Server, if one is present; null, otherwise.</returns> 
    public static string GetOdbcSqlDriverName() 
    { 
     List<string> driverPrecedence = new List<string>() { "SQL Server Native Client 11.0", "SQL Server Native Client 10.0", "SQL Server Native Client 9.0", "SQL Server" }; 
     string[] availableOdbcDrivers = GetOdbcDriverNames(); 
     string driverName = null; 

     if (availableOdbcDrivers != null) 
     { 
      driverName = driverPrecedence.Intersect(availableOdbcDrivers).FirstOrDefault(); 
     } 

     return driverName; 
    }