如何将C#字符串转换为Span< char&gt ;? (跨度T) [英] How do I convert a C# string to a Span<char>? (Span<T>)

问题描述

如何将字符串转换为Span< T>?

How do I convert a string to a Span<T>?

Span<char> mySpan = "My sample source string";

推荐答案

Span<T>和朋友包含在.NET Core 2.1中，因此不需要安装其他NuGet程序包.

Span<T> and friends are included in .NET Core 2.1, so no additional NuGet-package needs to be installed.

Dan Sorensen当时的回答是正确的，并且基于预览，但现在已经过时了. 对于字符串，扩展方法为AsSpan和AsMemory，分别返回ReadOnlySpan<char>和ReadOnlyMemory<char>.

Dan Sorensen answer was correct at that date and based on the preview, but now it is outdated. For string the extension methods are AsSpan and AsMemory, that return ReadOnlySpan<char> and ReadOnlyMemory<char> respectively.

显式AsReadOnlySpan不见了，因为string是不可变的，因此取回Span<char>(可写)是没有意义的.

ExplicitAsReadOnlySpan is gone, because strings are immutable, so it makes no sense to get back a Span<char> (that is writeable).

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