用API得到局域网中可用SqlServer服务器列表

     /// <returns></returns>

     public static string[] GetServers()

     {

         string list = string.Empty;

         IntPtr henv = IntPtr.Zero;

         IntPtr hconn = IntPtr.Zero;

         System.Text.StringBuilder inString = new System.Text.StringBuilder(SQL_DRIVER_STR);

         System.Text.StringBuilder outString = new System.Text.StringBuilder(DEFAULT_RESULT_SIZE);

         short inStringLength = (short) inString.Length;

         short lenNeeded = 0;

         try

         {

              if (SQL_SUCCESS == SQLAllocHandle(SQL_HANDLE_ENV, henv, out henv))

              {

                   if (SQL_SUCCESS == SQLSetEnvAttr(henv,SQL_ATTR_ODBC_VERSION,(IntPtr)SQL_OV_ODBC3,0))

                   {

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