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Marshal.PtrToStringAnsi Method (IntPtr)

Copies all characters up to the first null character from an unmanaged ANSI string to a managed String, and widens each ANSI character to Unicode.

Namespace:  System.Runtime.InteropServices
Assembly:  mscorlib (in mscorlib.dll)

public static string PtrToStringAnsi(
	IntPtr ptr
)

Parameters

ptr
Type: System.IntPtr
The address of the first character of the unmanaged string.

Return Value

Type: System.String
A managed string that holds a copy of the unmanaged ANSI string. If ptr is null, the method returns a null string.

PtrToStringAnsi is useful for custom marshaling or when mixing managed and unmanaged code. Because this method creates a copy of the unmanaged string's contents, you must free the original string as appropriate. This method provides the opposite functionality of the Marshal.StringToCoTaskMemAnsi and Marshal.StringToHGlobalAnsi methods.

The following example uses the PtrToStringAnsi method to create a managed string from an unmanaged char array.


using namespace System;
using namespace System::Runtime::InteropServices;

void main()
{
	// Create an unmanaged c string.
	const char * myString = "Hello managed world (from the unmanaged world)!";
	
	// Convert the c string to a managed String.
	String ^ myManagedString = Marshal::PtrToStringAnsi((IntPtr) (char *) myString);
	
	// Display the string to the console.
	Console::WriteLine(myManagedString);
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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