C#---将字符串按空格分隔

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string[] line = System.Text.RegularExpressions.Regex.Replace(strline.Trim(), @"[\s]+", " ").Split(" ".ToCharArray());

应用
将文件mstreet解析为road.txt
mstreet

    9          mstreet                                5663673.13   3545681.50 663692.25   3545717.54 663708.44   3545741.81 663726.83   3545767.19 663744.15   3545778.23    14          mstreet                                3663072.13   3547152.70 662910.24   3547161.54 662809.83   3547167.01    15          mstreet                                2663071.21   3547464.98 662732.78   3547481.00

road.txt

9   mstreet 663673.13   3545681.509   mstreet 663692.25   3545717.549   mstreet 663708.44   3545741.819   mstreet 663726.83   3545767.199   mstreet 663744.15   3545778.2314  mstreet 663072.13   3547152.7014  mstreet 662910.24   3547161.5414  mstreet 662809.83   3547167.0115  mstreet 663071.21   3547464.9815  mstreet 662732.78   3547481.0016  mstreet 663047.61   3547737.4816  mstreet 662797.97   3547739.9523  mstreet 669243.05   3548352.5223  mstreet 669243.69   3548352.13

        static void Main(string[] args)        {            StreamWriter sw = new StreamWriter("road.txt", false);            StreamReader sr = File.OpenText("mstreet");            string strline;            double x, y, roadID, num;            while ((strline = sr.ReadLine()) != null)            {                string[] line = System.Text.RegularExpressions.Regex.Replace(strline.Trim(), @"[\s]+", " ").Split(" ".ToCharArray());                for (int i = 0; i < 3; i++)                    Console.Write(line[i] + " ");                Console.WriteLine();                roadID = Convert.ToDouble(line[0]);                num = Convert.ToInt32(line[2]);                for (int i = 0; i < num; i++)                {                    strline = sr.ReadLine();                    line = System.Text.RegularExpressions.Regex.Replace(strline.Trim(), @"[\s]+", " ").Split(" ".ToCharArray());                    x = Convert.ToDouble(line[0]);                    y = Convert.ToDouble(line[1]);                    sw.WriteLine("{0}\t{1}\t{2:F}\t{3:F}", roadID, "mstreet", x, y);                }            }            sw.Close();            sr.Close();        }    }

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