"IndexOf("?)"是什么意思? ? [英] what mean "IndexOf("?")" ?

问题描述

朋友，

该代码是什么意思

hi friends,

what mean this code

filename = verbs[1].Replace("/", "\\");
            if (filename.IndexOf("?") != -1)
            {
                // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                filename = filename.Substring(0, filename.IndexOf("?"));
            }

恰好

exactly

if(filename.IndexOf("?") != -1)

谢谢

thank you

推荐答案

IndexOf方法返回给定子字符串在字符串中的位置并返回一个数字.如果未找到子字符串，则返回-1.

在您的情况下，仅当filename包含?"时，才会执行if语句中的代码.角色.

请参见 String.IndexOf()

The IndexOf method returns the position of the given substring inside a string and returns a number. If the substring is not found, it returns -1.

In your case the code inside the if statement will only execute if filename contains the "?" character.

See String.IndexOf()

此检查原始字符串中的字符/字符串部分(-1表示它不是字符串的一部分).在问这些问题之前，您应该自己尝试一下.

This checks for the character/string part in the original string (-1 means that it is not part of the string). Before asking such questions you should try something yourself.

这意味着返回?"字符首次出现的位置.真的，一个简单的Google搜索就会告诉您IndexOf方法的作用.

编辑===================

为什么要对此进行1票表决.答案是正确的.

It means return the position of the first occurance of the ''?'' character. Really, a simple google search would have told you what the IndexOf method does.

EDIT ====================

Why was this 1-voted. It''s the correct freakin'' answer.

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