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by: Stefan |
last post by:
I have the following question
The Marshal class contains a function to allocate a block of memory
1. Marshal.AllocHGlobal ( int cb
2. Marshal.AllocHGlobal ( IntPtr cb
The first version I can understand, because the integer indicates the size of the memory block that is required
But the second version I do not understand. If I want a memoryblock of 20 bytes could I use
IntPtr p = Marshal.AllocHGlobal ( new IntPtr ( 20 ) )
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by: dhornyak |
last post by:
I have been banging my head against the wall for a while now, and can't
seem to id the problem. I've been through a ton of posts and the code
doesn't seem any different. Can anybody see it?
When I call to GetTokenInformation I receive a buffer size (see
//HERE... comment in code), but when I let the code continue, asp.net
just sits there returning nothing, apparently on the
Marshal.AllocHGlobal call.
Here's the library function:
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by: Hypnotron |
last post by:
>Hello,
>Regarding Marshal.AllocHGlobal versus Marshal.AllocCoTaskMem Does anyone
>know the circumstances in which one should use one over the other?
>
>http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html
/
frlrfsystemruntimeinteropservicesmarshalclassalloccotaskmemtopic.asp
>
>http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/ba
s
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by: Just Me |
last post by:
The following almost works.
The problem is Marshal.PtrToStringAuto seems to terminate at the first null
so I don't get the full string.
Any suggestions on how to fix this?
Or how to improve the code?
Thanks
PS I added the +1 because as I understand the GetLogicalDriveStrings doc
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by: **Developer** |
last post by:
If I need to allocate memory, maybe because I'm going to:
Marshal.StructureToPtr
Does it matter which of the following I use?
Marshal.AllocCoTaskMem
Marshal.AllocHGlobal
I know the arguments are different which would make one more convient in a
given situation, but other that that does it make any signifficant
difference.
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by: scottt |
last post by:
I need to call into a C++ DLL from my C# code.
The function is expecting a void pointer to an unsigned short.
Which would be more correct?
UInt16 wRegData;
IntPtr p = Marshal.AllocHGlobal(Marshal.SizeOf(wRegData));
Marshal.StructureToPtr(wRegData, p, false);
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by: nicewenyan |
last post by:
I want to pass a managed c# byte (8 bit) array into a unmanaged c++
function:
extern "C" void AddData(unsigned int* data);
I use P/Invoke on managed side to do the marshaling as following:
public static extern int AddData(IntPtr data);
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by: O.B. |
last post by:
When using Marshal to copy data from a byte array to the structure
below, only the first byte of the "other" array is getting copied from
the original byte array. What do I need to specify to get
Marshal.PtrToStructure to copy the all the data into the "other"
array?
unsafe public struct DeadReckoning
{
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by: Charming12 |
last post by:
Hi All,
I have a strange problem and due to my inefficiency with IntPtr i am unable to figure it out.
I have an structure something like:
public struct Detail
{
public int age;
public Detail(int _age)
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by: Hystou |
last post by:
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This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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last post by:
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last post by:
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last post by:
How can i add a mobile payment intergratation into php mysql website.
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