IntPtr is a .NET Framework platform-specific type that is used to represent a pointer or a handle.
IntPtr is a .NET Framework platform-specific type that is used to represent a pointer or a handle.
Questions tagged [intptr]
296 questions
7
votes
1 answer
gdip image save directly intptr in my local drive
I have this code to get the image file from the scanner and save it on local disk:
IntPtr img = (IntPtr)pics[i];
SetStyle(ControlStyles.DoubleBuffer, false);
…
Ehsan Akbar
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7
votes
3 answers
IntPtr and avoiding unsafe code
I have an external library that takes an IntPtr. Is there any safe way to do this...
int BytesWritten = 0;
Output.WriteBytes(buffer, new IntPtr(&BytesWritten));
...without having to use 'unsafe' code? I'm not that familiar with IntPtrs, but I'd…
Aric TenEyck
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7
votes
1 answer
Convert/Cast String (from a textbox) to IntPtr C#
I have a textbox where I want to input (manually) a Handle (https://i.stack.imgur.com/4Zzrt.png)
My problem: to get the value from the textbox I need to do this:
textBoxHandle.Text;
but when I initialize my Handle as IntPtr (handle), this doesn't…
сами J.D.
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7
votes
1 answer
How to get an IntPtr to access the view of a MemoryMappedFile?
Is there a way to get a direct IntPtr to the data in a MemoryMappedFile?
I have large data block with high frequency change and I don't want to copy it
ittay
- 519
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7
votes
2 answers
IntPtr allow implicit conversion from ulong to long
class A
{
public static explicit operator A(long mm)
{
return null;
}
}
UInt64 ul = UInt64.MaxValue;
IntPtr ptr = (IntPtr)ul;//no error
A a = (A)ul;//Cannot convert type 'ulong' to 'A'
why do IntPtr allow the behavior?
following…
Vince
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7
votes
5 answers
IntPtr arithmetics
I tried to allocate an array of structs in this way:
struct T {
int a; int b;
}
data = Marshal.AllocHGlobal(count*Marshal.SizeOf(typeof(T));
...
I'd like to access to allocated data "binding" a struct to each element in array allocated
with…
Luca
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7
votes
1 answer
IntPtr.ToInt32() and x64 systems
In my c# dll I have some code like this to interact with some unmanaged dlls:
IntPtr buffer = ...;
TTPOLYGONHEADER header = (TTPOLYGONHEADER)Marshal.PtrToStructure(
new IntPtr(buffer.ToInt32() + index),…
devdept2
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6
votes
2 answers
How to convert byte[] array to IntPtr?
Possible Duplicate:
How to get IntPtr from byte[] in C#
I'm reading strings from memory with
byte[] array =
reader.ReadProcessMemory((IntPtr)address, (uint)255, out bytesReadSize);
and then I'm converthing this array to string.
I've got a…
Patryk
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6
votes
1 answer
How to get all memory address space used by a process?
I need to know all memory address space used by a process. The memory space will later be scanned to locate values within the process and identify their locations / addresses. My current process for this is to take each module's base address through…
tsilb
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6
votes
5 answers
Why can't we do IntPtr and UIntPtr arithmetic in C#?
It's a simple-looking question:
Given that native-sized integers are the best for arithmetic, why doesn't C# (or any other .NET language) support arithmetic with the native-sized IntPtr and UIntPtr?
Ideally, you'd be able to write code like:
for…
user541686
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6
votes
2 answers
IntPtr to Byte Array and Back
Referencing How to get IntPtr from byte[] in C#
I am attempting to read the data that an IntPtr is referencing into a byte [] and then back into another IntPtr. The pointer is referencing an image captured from a scanner device so I have also made…
Scruffy The Janitor
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6
votes
1 answer
How to marshal int* in C#?
I would like to call this method in unmanaged library:
void __stdcall GetConstraints(
unsigned int* puiMaxWidth,
unsigned int* puiMaxHeight,
unsigned int* puiMaxBoxes
);
My solution:
Delegate…
MartyIX
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6
votes
1 answer
Marshal.Copy, copying an array of IntPtr into an IntPtr
I can't figure out how does the Copy(IntPtr[], Int32, IntPtr, Int32) method works.
I though it could copy the data contained in multiple IntPtrs into a single IntPtr (as MSDN states) but apparently it doesn't work as I expected:
IntPtr[] ptrArray =…
mainvoid
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6
votes
3 answers
How to wait for the first of the 2: a process and an EventWaitHandle
I want to WaitForMultipleObjects on 2 different types:
an 'EventWaitHandle'
a 'Process.Handle' ==> intptr
I don't know how to convert (in the appropriate way) "process.Handle" to a WaitHandle in order to have the following code working:
var…
Eric Ouellet
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6
votes
1 answer
why is it not possible to compare IntPtr.Zero and default(IntPtr)?
I just learned the hard way that IntPtr.Zero cannot be compared to default(IntPtr). Can someone tell me why?
IntPtr.Zero == new IntPtr(0) -> "could not evaluate expression"
IntPtr.Zero == default(IntPtr) --> "could not evaluate…
John Smith
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