是否有相当于到C的的atoi功能的.NET？ [英] Is there a .NET equivalent to C's atoi function?

问题描述

如果我有这样的字符串：

If I have a string like:

"26 things"

我想将其转换为26。我只想在字符串的开头的整数。

I want to convert it to 26. I just want the integer at the beginning of the string.

如果我使用C，我只是使用atoi功能。但我似乎无法找到任何的.NET等价。

If I was using C, I'd just use the atoi function. But I can't seem to find anything equivalent in .NET.

什么是抓住从一个字符串的开始？

What's the easiest way to grab the integer from the beginning of a string?

编辑：我很抱歉，我是不明确的。即寻找一个空格字符的字符串中的答案，将工作在许多情况下（甚至可能是我的）。我希望的是与atoi等同于.NET。答案也应该包含26things字符串工作。谢谢你。

I'm sorry I was ambiguous. The answers that look for a space character in the string will work in many circumstances (perhaps even mine). I was hoping for an atoi-equivalent in .NET. The answer should also work with a string like "26things". Thanks.

推荐答案

这应该工作（编辑忽视在字符串的开头空格）

This should work (edited to ignore white-space at the begining of the string)

int i = int.Parse(Regex.Match("26 things", @"^\s*(\d+)").Groups[1].Value);

如果你担心检查，如果有一个值，你可以做以下给你一个-1值如果在字符串的开头没有整数。

If you are worried about checking if there is a value you could do the following to give you a -1 value if there is no integer at the begining of the string.

Match oMatch = Regex.Match("26 things", @"^\s*(\d+)");
int i = oMatch.Success ? int.Parse(oMatch.Groups[1].Value) : -1;

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