C#中如何分割字符串

string[] result = originalString.Split(separatorChars, StringSplitOptions);

string originalString = "Hello world"; 
string[] result = originalString.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
 Console.WriteLine(result[1]); 
// 输出 "world"

string originalString = "apple, banana, orange"; 
string[] result = originalString.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries); 
foreach (string s in result)
 {
     Console.WriteLine(s);
 } 
// 输出： // apple // banana // orange

  string st="GT123_1"; 

    string[] sArray=st.Split(‘_');// 一定是单引 

    即可得到sArray[0]="GT123",sArray[1]="1"; 

例如 复制代码代码如下: 

 string str = "GTAZB_JiangjBen_123"; 

    string[] sArray = str.Split(new char[2] { 'j', '_' }); 

    foreach(string e in sArray) 

    { Console.WriteLine(e); } 

    得到sArray[0]="GTAZB",sArray[1]="Jiang",sArray[2]="Ben",sArray[3]="123"; 

 string str = "GTAZB_JiangjBen_123"; 

   string[] sArray = str.Split( new string[]{"Ji","jB"}, StringSplitOptions.RemoveEmptyEntries); 

   foreach(string e in sArray) 

  { Console.WriteLine(e); } 

   得到sArray[0]="GTAZB_",sArray[1]="ang",sArray[2]="en_123"; 

string str = "GTAZB_JiangjBen_123"; 

   int start=3,length=8; 

   Console.WriteLine(str.Substring(start-1, length)); 

   输出得到AZB_Jian。 

 string str = "GTAZB_JiangjBen_123"; 

   string tSt; int i=5; 

   tSt = str.Substring(str.Length - i); 

   Console.WriteLine(tSt); 

   输出n_123; 

  string str = "GTAZB_JiangjBen_123"; 

   string tSt; 

   tSt = str.Replace("123","321"); 

   Console.WriteLine(tSt); 

   输出GTAZB_JiangjBen_321 

string str = "GTAZB_JiangjBen_123"; 

   string tSt; tSt = str.Replace("Jiangj",""); 

   Console.WriteLine(tSt); 

   输出GTAZB_Ben_123 

public static void Main() 

{ 

   string str = "1 2 3 4 5 6 7 8 9"; 

   Console.WriteLine("Original string: \"{0}\"", str); 

   Console.WriteLine("CSV string: \"{0}\"", str.Replace(' ', ',')); 

}

输出：Original string: "1 2 3 4 5 6 7 8 9" 

      CSV string: "1,2,3,4,5,6,7,8,9" 

string str = "GTAZB_JiangjBen_123"; 

   int i=5,length=8; 

   str=str.remove(i, length); 

   console.writeline(str); 

   输出GTAZBen_123。 

 string s = "abc---def"; 

   Console.WriteLine("{0}", s.Remove(3)); 

   输出：abc