C#循环读取文件流，按行读取

public Dictionary<string,string> GetSourceDisksElements(String section)

{

        section = "[" + section;

        Dictionary<string, string> keyToValue = new Dictionary<string, string>();

        //打开文件流，开始读取文件

        using (StreamReader sin = new StreamReader(new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read)))

        {

                for (String str = sin.ReadLine(); str != null; str = sin.ReadLine())

                {

                    if (str.Trim().StartsWith(section, StringComparison.OrdinalIgnoreCase)) //some section has comment. 

                    {

                        for (str = sin.ReadLine(); str != null && !str.Trim().StartsWith("["); str = sin.ReadLine()) //loop for get string, until to next section or end of file.

                        {

                            if (!String.IsNullOrEmpty(str.Trim()) && !str.Trim().StartsWith(";"))  //drop the comment line and empty line. //去掉name-value对的限制，因为存在无=的情况。20100309.str.Contains('=') &&  only get the name-value pair line.

                            {   

                                String[] keyValues = str.Split('=');

                                if (section.Equals("[SourceDisksNames"))

                                {

                                    string[] noCommentValues = keyValues[1].Split(';');

                                    string realValue = noCommentValues[0].Trim();



                                    String[] sourceDiskCfg = realValue.Split(',');  //disk-description[,[tag-or-cab-file],[unused],[path],[flags][,tag-file]]  (tag-file : Windows XP and later versions of Windows)

                                    String diskpath = String.Empty;

                                    if (sourceDiskCfg.Length > 3)

                                        diskpath = sourceDiskCfg[3].Trim();



                                    if (diskpath.StartsWith("\""))

                                        diskpath = RemoveQuotes(diskpath);



                                    if (!String.IsNullOrEmpty(diskpath) && diskpath.StartsWith("."))

                                        diskpath = diskpath.Substring(diskpath.IndexOf('\\'));



                                    //20150112

                                    if (!String.IsNullOrEmpty(diskpath) && !diskpath.StartsWith("\\"))

                                        diskpath = "\\" + diskpath;



            

                                    keyToValue.Add(keyValues[0].Trim(), diskpath);

                                }

                                else

                                {

                      

                                    string[] noCommentValues = keyValues[1].Split(';');

                                    string realValue = noCommentValues[0].Trim();

                                    keyToValue.Add(keyValues[0].Trim(), realValue);

                                }

                            }

                        }

                        break;

                    }

                }

            }

            return keyToValue;

        }

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