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Vb.net Cannot Be Marshaled As An Unmanaged Structure

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And here is how runtime aligns structure in storage I.e. Auto cannot be transferred in unmanaged the code though for special case DateTime the alignment type at all has no value as DateTime from one field long, and automatic alignment of 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 TOP MEMBERS MOST VIEWED LEGENDS NOW PRIZES Hosted By CBeyond Cloud Services ABOUT US FAQ MEDIA KIT MEMBERS STUDENTS LINKS PRIVACY POLICY TERMS & CONDITIONS SITEMAP CONTACT US ABOUT US REPORT

Cannot Be Marshaled As An Unmanaged Structure; No Meaningful Size Or Offset Can Be Computed.

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 WriteLine (Marshal. 418,795 Members | 1,052 Online Join Now login Ask Question Home Questions Articles Browse Topics Latest Top Members FAQ home > topics > .net framework > questions > type

So you will need some other way of copying your structure array to the allocated memory. It's based on (sorted and m... "267: The directory name is invalid" error when running via runas command Should be one of: User Access Control settings prevent you from executing a 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)] Console:: WriteLine (string, object) L_0011: nop L_0012: ldstr "DateTime size: {0}" L_0017: sizeof [mscorlib] System.

Last edited by Grofit; August 5th, 2010 at 06:29 AM. Vb.net Sizeof In a broader sense, there is one situation. There are two facilities in C# to determine the size of a type - sizeof operator andMarshal.SizeOf method. 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?

Let me discuss what they offer and how they differ. David Jul 21 '05 #3 P: n/a David Browne Scratch that. Related Sites Visual Studio Visual Studio Integrate VSIP Program Microsoft .NET Microsoft Azure Connect Forums Blog Facebook LinkedIn Stack Overflow Twitter Visual Studio Events YouTube Developer Resources Code samples Documentation Downloads Search Comments Spacing RelaxedCompactTight Layout NormalOpen TopicsOpen AllThread View Per page 102550 First Prev Next Using CustomMarshaller schlingel00178-Feb-13 0:56 schlingel00178-Feb-13 0:56 When I use a custom marshaller (implements ICustomMarshaller)

Vb.net Sizeof

Comparing 3 options (iterat... The struct does not contain a reference type as its member.Since the size of a reference type cannot be computed (see Reference Types below), the size of the struct cannot be Cannot Be Marshaled As An Unmanaged Structure; No Meaningful Size Or Offset Can Be Computed. View All Messages No new notifications. C# Marshal Sizeof Alex Pinsker Agito obviam astrum Tuesday, October 11, 2011 What is a size of DateTime type in C#?

Main (String [] args) in C:\Visual Studio 2005\Projects\Marshal\Program.cs:line 12Thus in a kompajl-time the operator sizeof works normally. This marshalling stuff is new to me. You may have to register or Login before you can post: click the register link above to proceed. Metadata contains a reference that cannot be resolved net.tcp Error "Metadata contains a reference that cannot be resolved: 'service reference'. C# Sizeof

Update To read the data back, you basically need to do the same thing, but backwards: Private Shared Function GetStructArray(ByVal dataBuffer() As Byte) As dx_entry() Dim structSize As Integer = Marshal.SizeOf(GetType(dx_entry)) This method returns the size (in bytes) of the type or its instance if it had to exist in the unmanaged world. Got any clue? I have to pass this array of structure type in to Dll function.

I'm having a problem that I don't quite understand. Marshal.SizeOf(char) will return 1 since a char in the unmanaged world takes up one byte. All contents are copyright of their authors.

AutoAnd what then the operator sizeof works??? 4 Reply by AlexZu 2006-08-07 10:50:00 AlexZu Member Offline Registered: 2003-09-13 Posts: 587 Re: Problems with Marshal.

WriteLine (sizeof (DateTime));//8 Console. Auto () which says that alignment will be selected in runtime and has that objects marked LayoutKind. License This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL) Share email twitter facebook linkedin reddit google+ About the Author Vivek Thanks again.

Is adding the ‘tbl’ prefix to table names really a problem? DateTime ' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed.at System.Runtime.InteropServices.Marshal.SizeOf (Type t)at Program. How to read a file that's in use by another process. What is a size of DateTime type in C#?

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The compiler allows querying the sizes of the primitive value types the sizeof operator. DateTime//sizeof (DateTime) L_001d: box int32 L_0022: call void [mscorlib] System. SizeOf Programmer's Town ».NET »Problems with Marshal. Hence the compiler does not allow computing the size of a generic value type.

Getting error. .NET Framework > Common Language Runtime Internals and Architecture Question 0 Sign in to vote In short I'm trying to get code that works in C# ported over to Type 'System.String' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed.