动态长度的子字符串

Question

我需要将下面的字符串值分解为2个变量。

输入

6.3全日托

预期输出：

var price=6.3; //The input is dynamic.Cannot get fixed length 
var serviceKey="full-day-care"; 

我怎么能这样做？ Substring在这里没有帮助。

Answer 1

您可以使用String.Split和String.Substring方法一样;

string s = "6.3-full-day-care"; 
int index = s.IndexOf('-'); //This gets index of first '-' character 

var price = s.Substring(0, index); 
var serviceKey = s.Substring(index + 1); 

Console.WriteLine(price); 
Console.WriteLine(serviceKey); 

输出将是;

6.3 
full-day-care 

这里一个DEMO。

Answer 2

，你可以这样做：

var val = "6.3-full-day-care"; 
var index = val.IndexOf("-"); //first occuarance of - 

var price =double.Parse(val[index]); 
var serviceKey = val.Substring(index); 

只给想法。这是尤为明显自然地使用double.TryParse(..)上price

double price = 0; 
double.TryParse(val[index], out prince, System.Globalization.InvariantCulture); 

Answer 3

这应该工作

var s = "6.3-full-day-care"; 
var index = s.IndexOf('-'); 
var price = s.Substring(0, index); 
var serviceKey = s.Substring(index + 1); 

Answer 4

如果价格和钥匙总是与一个分离 ' - '：

string s = "6.3-full-day-care"; 
int separatorIdx = s.IndexOf('-'); // get idx of first '-' 

// split original string 
string price = s.Substring(0, separatorIdx); 
string serviceKey = s.Substring(separatorIdx+1, s.Length); 

Answer 5

使用String.Split与最大计数http://msdn.microsoft.com/en-us/library/c1bs0eda.aspx

string s = "6.3-full-day-care"; 
string[] parts = s.split(new char[]{'-'}, 1); 

var price = parts[0]; 
var serviceKey = parts[1];