垫左，放大器;垫右（垫中心）字符串 [英] Pad Left & Pad Right (Pad Center) String

问题描述

字符串既有 PadLeft 和 PadRight 。我需要填充左，右（居中对齐）的。是否有这样做，或者通过标准的方式更好，但内置的实现同样的目标的方法是什么？

String has both PadLeft and PadRight. I am in need of padding both left and right (center justification). Is there a standardized way of doing this, or better yet, a built in way of achieving the same goal?

推荐答案

这并不是说我知道。如果你看到自己使用了很多，你可以创建一个扩展方法。假设你希望你的字符串在中心结束了，使用类似以下

Not that I know of. You can create an extension method if you see yourself using it a lot. Assuming you want your string to end up in the center, use something like the following

public string PadBoth(string source, int length)
{
    int spaces = length - source.Length;
    int padLeft = spaces/2 + source.Length;
    return source.PadLeft(padLeft).PadRight(length);

}

为使这是一个扩展方法，这样做就像这样：

To make this an extension method, do it like so:

namespace System
{
    public static class StringExtensions
    {
        public static string PadBoth(this string str, int length)
        {
            int spaces = length - str.Length;
            int padLeft = spaces / 2 + str.Length;
            return str.PadLeft(padLeft).PadRight(length);
        }
    }
}

顺便说一句，我只是包括我在系统命名空间扩展 - 这取决于你怎么办

As an aside, I just include my extensions in the system namespace - it's up to you what you do.

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