通过强制转换或Convert.ToSingle()将double转换为float? [英] Convert double to float by cast or Convert.ToSingle()?

问题描述

在C#中，我可以通过强制转换(float)或 Convert.ToSingle()将double转换为float.

In C# I can convert doubles to floats by a cast (float) or by Convert.ToSingle().

double x = 3.141592653589793238463;
float a = (float)x;
float b = Convert.ToSingle(x);

a 和 b 相等.

两种技术之间是否有区别?我应该选择哪一个?为什么?

Are there any differences between both techniques? Which one should I prefer and why?

推荐答案

来自 .NET参考源:

public static float ToSingle(double value)
{
     return (float)value;
}

因此，您的答案是，它们在引擎盖下完全相同.

So, your answer is that they are exactly the same, under the hood.

两者之间的任何偏爱严格来说都是个人风格的选择.就我个人而言，我总是会使用演员表，因为它较短，而且对我来说似乎更惯用.

Any preference between the two is strictly a personal style choice. Personally, I would always use the cast as it is shorter and and just seems more idiomatic to me.

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