Hi,
I know that as a general rule, whenever your class contains members that
implicitly or explicitly implement IDisposable, your class should too.
However, does it count when my class uses a using claus?
class A
{
private void doSomething()
{
using(StreamRea der sr = new StreamReader(.. ))
{ // code }
}
}
1. Would class A still need to implement IDisposable, or is the using clause
completely 'safe'?
2. If I use a thy-catch clause around the using clause, and an exception
occurs, will some resources (the StreamReader) not get cleaned up properly?
(And maybe that would be the answer to number 1, eg. Yes I should still
implement IDisposable?)
3. When using the using clause, would I still need to call sr.Close()? I
take it the Close() method eventually calls the Dispose() method too, so it
wouldn't be necessary...
Thank you!
Razzie 3 2143
Razzie wrote: Hi,
I know that as a general rule, whenever your class contains members that implicitly or explicitly implement IDisposable, your class should too. However, does it count when my class uses a using claus?
class A { private void doSomething() { using(StreamRea der sr = new StreamReader(.. )) { // code } } }
1. Would class A still need to implement IDisposable, or is the using clause completely 'safe'?
It's safe. No need to implement IDisposable in your class (it wouldn't help
anyway).
2. If I use a thy-catch clause around the using clause, and an exception occurs, will some resources (the StreamReader) not get cleaned up properly? (And maybe that would be the answer to number 1, eg. Yes I should still implement IDisposable?)
"Using" is a syntactical shortcut for a try/finally block that invokes
Dispose() on the "used" IDisposable. Thus, it acts like a nested try block.
3. When using the using clause, would I still need to call sr.Close()? I take it the Close() method eventually calls the Dispose() method too, so it wouldn't be necessary...
Close() is (or should be) a synonym for Dispose() for types that support the
notion of closing, like readers, streams, or windows. In your example, "sr"
will be closed and thus also disposed.
Cheers,
--
Joerg Jooss www.joergjooss.de ne**@joergjooss .de 1. Would class A still need to implement IDisposable
No.
, or is the using clause completely 'safe'?
Yes.
2. If I use a thy-catch clause around the using clause, and an exception occurs, will some resources (the StreamReader) not get cleaned up properly?
It will get cleaned up fine.
3. When using the using clause, would I still need to call sr.Close()? I take it the Close() method eventually calls the Dispose() method too, so it wouldn't be necessary...
As far as I know, Dispose() normally calls Close() as a matter of course.
Thanks y'all.
"Razzie" <ra****@quickne t.nl> wrote in message
news:O3******** ********@TK2MSF TNGP09.phx.gbl. .. Hi,
I know that as a general rule, whenever your class contains members that implicitly or explicitly implement IDisposable, your class should too. However, does it count when my class uses a using claus?
class A { private void doSomething() { using(StreamRea der sr = new StreamReader(.. )) { // code } } }
1. Would class A still need to implement IDisposable, or is the using clause completely 'safe'? 2. If I use a thy-catch clause around the using clause, and an exception occurs, will some resources (the StreamReader) not get cleaned up properly? (And maybe that would be the answer to number 1, eg. Yes I should still implement IDisposable?) 3. When using the using clause, would I still need to call sr.Close()? I take it the Close() method eventually calls the Dispose() method too, so it wouldn't be necessary...
Thank you!
Razzie This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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