在Visual C# 2008中解析tnsnames.ora

Question

如何使用Visual C# (Visual Studio2008Express edition)解析tnsnames.ora文件以获得tnsname？例如，我的tnsnames.ora文件包含

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = shaman)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )
BILL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.58)(PORT = 1522))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

如何解析此文件以获得TNSNAMES (即ORCL、BILL等)。如果这个问题听起来太明显，请原谅，我正在学习并尝试使用C#

Answer 1

首先，您将需要the syntax rules for this file。

这可能有一种破解方法，但我个人倾向于使用一个完整的解析器，比如结合了ANTLR和the proper grammar (一个完整的ANTLR语法can be found here列表)。

Answer 2

public List<string> ReadTextFile(string FP)
{

    string inputString;
    List<string> List = new List<string>();

    try
    {
        StreamReader streamReader = File.OpenText(FP.Trim()); // FP is the filepath of TNS file

        inputString = streamReader.ReadToEnd();
        string[] temp = inputString.Split(new string[] {Environment.NewLine},StringSplitOptions.None);

        for (int i = 0; i < temp.Length ;i++ )
        {
            if (temp[i].Trim(' ', '(').Contains("DESCRIPTION"))
            {                   
                string DS = temp[i-1].Trim('=', ' ');
                List.Add(DS);
            }             

        }
        streamReader.Close();
    }
    catch (Exception EX)
    {
    }


    return List;

}

Answer 3

与Sathya提供的方法一起创建一个方法：

StringBuilder strTns = new StringBuilder ();

foreach ( var fileLine in System.IO.File.ReadAllLines(fiTNS.FullName ) )
{
    if ( (fileLine.Length > 0 
           && fileLine.Trim().Substring(0,1) != "#" 
          )
          && ( fileLine.Length > 0 
                && fileLine.Trim ().Substring (0,1) != "/" 
              )
        )

        {
           strTns.AppendFormat("{0}{1}", fileLine, Environment.NewLine);
        }
}

//TNSNamesValues = System.IO.File.ReadAllText (fiTNS.FullName).ToString ().Replace ("\n", "" ).Replace ("\r", "");
String[] splitSeparator = LoadTNSNames (OracleHomeRegistryKey).ToArray ();
String[] TNS = strTns.ToString().Split (splitSeparator, StringSplitOptions.None);