C# Substring() 截取字符串的用法

语法:

public string Substring(int startIndex);
public string Substring(int startIndex, int length);

示例:

string id = "123456196108047890";
string birthdate = id.Substring(6);      //------------------196108047890
string brithdate = id.Substring(6,8); //--------------------19610804
string fileName = "Program.cs";
string strName = fileName.Substring(0,fileName.IndexOf('.'));  //------------Program
string strExten = fileName.Substring(fileName.IndexOf('.'));  //---------------.cs

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