LINQ：转换列表＆LT; INT＆GT;到整数的加入字符串？ [英] Linq: convert a list<int> to a joined string of ints?

问题描述

我和值3,99,6 int数组。如何将数组转换成字符串 3,99,6 使用LINQ？

解决方案

  INT []列表=新[] {3，99，6};
字符串s =的string.join（，，list.Select（X =＆GT; x.ToString（））ToArray的（））;
 

修改，C＃4.0

使用C＃4.0中，有 字符串的另一超载。加入 ，最终允许传递一个的IEnumerable＆LT;串＆GT; 或的IEnumerable＆LT; T＆GT; 直接。没有必要创建一个数组，而且也没有必要要求的ToString（），这是隐式调用：

 字符串s =的string.join（，清单）;
 

通过明确的格式化字符串：

 字符串s =的string.join（，list.Select（X =＆GT; x.ToString（/*...*/））;
 

I have an int array with the value 3,99,6. How do i convert the array into the string 3,99,6 with linq?

解决方案

int[] list = new [] {3, 99, 6};
string s = string.Join(",", list.Select(x => x.ToString()).ToArray());

Edit, C# 4.0

With C# 4.0, there is another overload of string.Join, which finally allows passing an IEnumerable<string> or IEnumerable<T> directly. There is no need to create an Array, and there is also no need to call ToString(), which is called implicitly:

string s = string.Join(",", list);

With explicit formatting to string:

string s = string.Join(",", list.Select(x => x.ToString(/*...*/));

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