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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: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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