这是一个什么样的for循环？

Question

Is there a special name for this type of for loop in c#?

for (EventRecord eventdetail = logReader.ReadEvent(); eventdetail != null; eventdetail = logReader.ReadEvent())

EDIT: I'm trying to research if there is a way to do this in a multithreaded way. since Parallel.For can't be called in the same fashion I was hoping there was a special name for the above type of for loop since it isn't incremented or decremented like the typical for loop is.

Answer 1

It reads an EventRecord with the first logReader.ReadEvent,

for(EventRecord eventdetail = logReader.ReadEvent(); ....

then checks if this instance is null,

for(.....;eventdetail != null;....)

then executes the body of the for loop and then ask again for another EventRecord.

for(.....;.....;eventdetail = logReader.ReadEvent())

and again checks if the return is null. This continues until the EventRecord returned by ReadEvent is null.

It is smart but I would prefer a more readable while loop

while((EventRecord eventdetail = logReader.ReadEvent()) != null)
{
   .....
}

Answer 2

There is no special name. It just an ordinary run of the mill for loop . It has an initializatin-clause,condition-clause,iteration-clause.

For what its worth...any on of the clause can be omitted!
IE For(;;) will create an infinite loop.

for statement (C# reference)