字符串中的字符出现的次数 [英] Number of occurrences of a character in a string

问题描述

我想获得某个字符的出现次数，例如＆放大器; 以下字符串

I am trying to get the number of occurrences of a certain character such as & in the following string.

string test = "key1=value1&key2=value2&key3=value3";

我如何确定有2个符号（＆安培;）？在上面的测试字符串变量

How do I determine that there are 2 ampersands (&) in the above test string variable?

推荐答案

您可以这样做：

int count = test.Split('&').Length - 1;

或者使用LINQ：

test.Count(x => x == '&');

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