C# 中 &= 运算符的作用是什么？
C# 中 &= 运算符的作用是什么？
例如：
bool approved;
// Approved is a property of cra, also bool
approved &= cra.Approved;
非常感谢！
What does the &= operator do in C#?
For example:
bool approved;
// Approved is a property of cra, also bool
approved &= cra.Approved;
Thanks a lot!
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这意味着它是一个复合赋值运算符。就像：
就像
所以
就像
在这种情况下
&是逻辑 AND 运算符（因为我们正在处理bool值；对于整数，它将是按位与运算符）。有关复合赋值运算符的具体性质的更多详细信息，请参阅 C# 4 规范的第 7.17.2 节。
It means it's a compound assignment operator. Just like:
is like
So
is like
where
&is the logical AND operator in this case (because we're dealing withboolvalues; for integers it would be the bitwise AND operator).See section 7.17.2 of the C# 4 spec for more details of the exact nature of compound assignment operators.
对于 bool 类型，它是逻辑与赋值运算符。对于整型，它是按位与赋值运算符。
它实际上等同于：
For the bool type, it is the logical-and assignment operator. For integral types, it is the bitwise-and assignment operator.
It is effectively the same as:
这是一个逻辑“与”。
来自 MSDN（& Operator）：
在您的代码中，这与以下内容相同：
It is a logical AND.
From MSDN (& Operator):
In your code this is the same as:
这是AND 赋值运算符。
它基本上是在做：
如果之前是 true 并且 cra.Approved 是 true，则将其设置为 true。
This is the AND assignment operator.
It is basically doing:
Which will set approved to true if it was true previously AND cra.Approved is true.
a &= b等于a = (a & b)。&运算符执行按位 AND。此按位 AND 运算仅涉及设置结果中最初在a和b中设置的那些位。a &= bis equal toa = (a & b).The
&operator performs a bitwise AND. This bitwise AND operation involves setting only those bits in the result that were originally set in bothaandb.