C# Substring() 方法
C# 中的 Substring() 方法用於從該例項檢索子字串。該子字串從一個指定字元位置開始,並持續到字串結尾。
語法
語法如下 -
public string Substring (int begnIndex); public string Substring (int begnIndex, int len);
其中,begnIndex 是該例項中子字串的零為基的起始字元位置。len 引數是要檢索的子字串的長度
示例
讓我們看一個示例 -
using System;
public class Demo {
public static void Main(String[] args) {
string str1 = "Katherine";
string str2 = "PQRS";
Console.WriteLine("String1 = "+str1);
Console.WriteLine("String1 ToUpperInvariant = "+str1.ToUpperInvariant());
Console.WriteLine("String1 Substring from index4 = " + str1.Substring(4));
Console.WriteLine("
String2 = "+str2);
Console.WriteLine("String2 ToUpperInvariant = "+str2.ToLowerInvariant());
Console.WriteLine("String2 Substring from index2 = " + str2.Substring(2));
}
}輸出
String1 = Katherine String1 ToUpperInvariant = KATHERINE String1 Substring from index4 = erine String2 = PQRS String2 ToUpperInvariant = pqrs String2 Substring from index2 = RS
示例
讓我們看另一個示例 -
using System;
public class Demo {
public static void Main(String[] args) {
string str1 = "Notebook";
string str2 = "Ultrabook";
Console.WriteLine("String1 = "+str1);
Console.WriteLine("String1 ToUpperInvariant = "+str1.ToUpperInvariant());
Console.WriteLine("String1 Substring from index4 = " + str1.Substring(4, 4));
Console.WriteLine("
String2 = "+str2);
Console.WriteLine("String2 ToUpperInvariant = "+str2.ToLowerInvariant());
Console.WriteLine("String2 Substring from index2 = " + str2.Substring(0, 5));
}
}輸出
String1 = Notebook String1 ToUpperInvariant = NOTEBOOK String1 Substring from index4 = book String2 = Ultrabook String2 ToUpperInvariant = ultrabook String2 Substring from index2 = Ultra
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