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Type Cannot Be Marshaled As An Unmanaged Structure

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Does Intel sell CPUs in ribbons? OBDII across the world? My struct is as follows: [StructLayout(LayoutKind.Sequential)] public struct MyStruct { [MarshalAs(UnmanagedType.U4)] public UInt32 version; [MarshalAs(UnmanagedType.FunctionPtr)] public IntPtr Start; [MarshalAs(UnmanagedType.FunctionPtr)] public IntPtr Stop; // And a bunch more IntPtr, all declared the Also you can always marshal it as a big byte array and sort it out after the fact. http://stackoverflow.com/questions/17879787/marshal-sizeof-throws-argumentexception-on-enums

Marshal.sizeof String

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C# TBB updating metadata value Two-way high power outdoor Wi-Fi more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile Do we know Ford's old name? Why does top 50% need a -50% translate offset? Marshalas(unmanagedtype I'm using someone else's class: using HANDLE = System.IntPtr; namespace Win32 { // other stuff here public struct SHFILEINFO { public HANDLE hIcon; public int iIcon; public int dwAttributes; [MarshalAs(UnmanagedType.ByValArray, SizeConst=Kernel.MAX_PATH)]

share|improve this answer answered Jun 18 '11 at 23:47 Downvoter 468213 That is! Type 'system.string' Cannot Be Marshaled As An Unmanaged Structure The time now is 06:31 PM. How do unlimited vacation days work? this contact form here is the method i use to read the structure: Code: public static class BinaryReaderExtensions { public static T ReadStruct(this BinaryReader reader) where T : struct { var byteBuffer = reader.ReadBytes(Marshal.SizeOf(typeof

Linux questions C# questions ASP.NET questions fabric questions SQL questions discussionsforums All Message Boards... Structlayout I don't think it will work with a StringBuilder. So for such reasons, it does not make sense to determine the size of a reference type using sizeof (at least at compile time). I am seen in darkness and in light, What am I?

Type 'system.string' Cannot Be Marshaled As An Unmanaged Structure

Application Lifecycle> Running a Business Sales / Marketing Collaboration / Beta Testing Work Issues Design and Architecture ASP.NET JavaScript C / C++ / MFC> ATL / WTL / STL Managed C++/CLI https://bytes.com/topic/net/answers/120625-type-can-not-marshaled-unmanaged-structure I have tried your code and it works fine the way you posted it. –svick Jun 18 '11 at 22:49 in visual 2010? –Ungureanu vlad Jun 18 '11 at Marshal.sizeof String more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Marshal.sizeof C# the openBack, Feb 10, 2005 #5 Advertisements Show Ignored Content Want to reply to this thread or ask your own question?

UPDATE Marshal.Sizeof() failed on me in this generic method: public bool IoControlReadExact(uint ioControlCode, out T output) where T : struct { output = new T(); int outBufferSize = Marshal.SizeOf(typeof(T)); IntPtr outBuffer http://bovbjerg.net/cannot-be/type-actionbar-cannot-be-resolved-to-a-type.php Why does top 50% need a -50% translate offset? I am was long gusssed, why it gives me wrong size of my structure object — so the reason was that the structure had an arrays in it… ⁺¹ –Hi-Angel Oct Last edited by Grofit; August 5th, 2010 at 06:29 AM. C# Get Size Of Object

That implies the type for which the size is queried should be known at compile time. Hence the compiler does not allow computing the size of a generic value type. Go to top Permalink | Advertise | Privacy | Terms of Use | Mobile Web01 | 2.8.161110.1 | Last Updated 29 Jul 2010 Article Copyright 2010 by Vivek RagunathanEverything else Copyright have a peek here The compiler allows querying the sizes of the primitive value types the sizeof operator.

more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Marshal C# Usually CallingConvention.Cdecl, not the default of Stdcall. Results 1 to 3 of 3 Thread: [RESOLVED] Error marshalling pointer to struct with char[] Tweet Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode

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I'm having a problem that I don't quite understand. ByValArray can only be used with > arrays. > > > > Mattias > That was it, thank you! Can you dispel a magic effect you can't perceive? C# Sizeof Professor Lewin: "Which string will break?" / Me: "That one." / Professor Lewin: "Wrong!" What is the significance of the robot in the sand?

Using the eval command twice Do we know Ford's old name? And the error makes sense - Type cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed. SOLUTION I could refactor my generic method to make it work for both struct and enum: // determine the correct output type: Type outputType = typeof(T).IsEnum ? http://bovbjerg.net/cannot-be/type-the-type-java-lang-enum-cannot-be-resolved.php If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site.Would you like to participate?

Can you dispel a magic effect you can't perceive? I'm using someone >> else's class: >> >> >> using HANDLE = System.IntPtr; >> >> namespace Win32 { >> // other stuff here >> >> public struct SHFILEINFO { >> public How to handle a common misconception when writing a Master's thesis? This member is used only with output buffers.            public IntPtr lpNext;           // Reserved.            public IntPtr reserved;         // Reserved.        }How can I get the size of my new struct?  Marshal.SizeOf returns an

In many cases, the amount of memory to be allocated is the equivalent of a Win32 structure -LVITEM, STARTUPINFO or one such. However, the sizeof cannot be freely used with user-defined value types (struct) but only if the following conditions are true:- The size of the struct is requested from within an Forum New Posts FAQ Calendar Forum Actions Mark Forums Read Quick Links Today's Posts View Site Leaders What's New? asked 5 years ago viewed 2865 times active 5 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Get the weekly newsletter!

Join them; it only takes a minute: Sign up Marshal.SizeOf throws ArgumentException on enums up vote 42 down vote favorite 8 Consider this code: public enum MyEnum { V1, V2, V3 DIB Generate and add keyword variations using AdWords API Win32 vs. In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms The other way of putting this is sizeof works only for POD types.