Bob,
Marshal.SizeOf return the size of the type when it is marshaled. In other
words the size of the unmanaged representation of the type. Type's size in
the managed environment doesn't make sense that's why there is no mathod or
instruction to find it.
The latter is not completely true.There is *sizeof* instruction in C#, which
however works only in usnafe mode, only with value types and AFAIK it
returns the managed size of the type. *sizeof* and Marshal.SizeOf may return
different values in some cases.
--
Stoitcho Goutsev (100) [C# MVP]
"Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...
public struct aStruct
{
public int i;
public char c;
public double d;
}
aStruct a=new aStruct();
MessageBox.Show("SizeOf aStruct="+Marshal.SizeOf(a).ToString());
This seems to work. What are you having trouble with?
--
Bob Powell [MVP]
Visual C#, System.Drawing
The Image Transition Library wraps up and LED style instrumentation is
available in the June of Well Formed for C# or VB programmers
http://www.bobpowell.net/currentissue.htm
Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/gdiplus_faq.htm
The GDI+ FAQ RSS feed: http://www.bobpowell.net/faqfeed.xml
Windows Forms Tips and Tricks RSS: http://www.bobpowell.net/tipstricks.xml
Bob's Blog: http://bobpowelldotnet.blogspot.com/atom.xml
"Lei Jiang" <co**@263.net> wrote in message
news:up*************@tk2msftngp13.phx.gbl... Marshal.SizeOf can only be used on types being marshaled.
"Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> дÈëÏûÏ¢
news:O4**************@TK2MSFTNGP09.phx.gbl... Marshal.SizeOf
--
Bob Powell [MVP]
Visual C#, System.Drawing
The Image Transition Library wraps up and LED style instrumentation is
available in the June of Well Formed for C# or VB programmers
http://www.bobpowell.net/currentissue.htm
Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/gdiplus_faq.htm
The GDI+ FAQ RSS feed: http://www.bobpowell.net/faqfeed.xml
Windows Forms Tips and Tricks RSS: http://www.bobpowell.net/tipstricks.xml Bob's Blog: http://bobpowelldotnet.blogspot.com/atom.xml
"Lei Jiang" <co**@263.net> wrote in message
news:ex****************@TK2MSFTNGP12.phx.gbl...
> I'd like to calculate the memory size that my data structure cost,
but I > could not find any API that I could calculate the size of an object.
Could > anyone give me a work around?
>
> Thanks!
>
>
