datamatrix.net c# example INTEROPERABILITY in C#.NET

Generation DataMatrix in C#.NET INTEROPERABILITY

CHAPTER 13 INTEROPERABILITY
ECC200 Encoder In C#.NET
Using Barcode generator for VS .NET Control to generate, create Data Matrix ECC200 image in .NET applications.
www.OnBarcode.com
Data Matrix Recognizer In C#
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
The output of Listing 13-23 is as follows: System.ComponentModel.Win32Exception: The filename, directory name, or volume label syntax is incorrect at TestGetLastWin32Error() at main()
Make 2D Barcode In C#.NET
Using Barcode generation for .NET framework Control to generate, create 2D image in .NET applications.
www.OnBarcode.com
Barcode Maker In Visual C#
Using Barcode generator for .NET framework Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
Interop with C++ Exceptions
Creating GTIN - 128 In C#.NET
Using Barcode encoder for VS .NET Control to generate, create UCC - 12 image in .NET applications.
www.OnBarcode.com
Code128 Creator In C#.NET
Using Barcode printer for VS .NET Control to generate, create Code 128C image in .NET framework applications.
www.OnBarcode.com
C++ exception handling can exist alongside CLR exception handling. You can use subsequent catch blocks, with C++ exceptions in some catch filters and CLR exceptions in other catch filters. Remember that in 10 you saw what happens when throwing a type that does not derive from System::Exception to code in another .NET language. In that case, the nonexception type was wrapped as a RuntimeWrappedException. Wrapping also occurs when a native type is thrown from native code it is wrapped as SEHException in C++/CLI managed code and, if not caught by a matching catch block, will be caught by catch filters that match SEHException, ExternalException (the base class of SEHException), or Exception. Listing 13-26 shows the behavior with both a throw by value and via a native pointer. Listing 13-26. Coexistent C++ and CLR Exception Handling // native_exception.cpp #include <wchar.h> using namespace System; using namespace System::Runtime::InteropServices; #pragma unmanaged class NativeException { wchar_t m_str[1024]; public: NativeException(wchar_t* s) { wcscpy_s(m_str, s); } const wchar_t* GetMessage() { return m_str; } };
Encoding DataMatrix In C#.NET
Using Barcode maker for Visual Studio .NET Control to generate, create ECC200 image in .NET applications.
www.OnBarcode.com
Generate Rationalized Codabar In C#.NET
Using Barcode maker for .NET framework Control to generate, create 2 of 7 Code image in VS .NET applications.
www.OnBarcode.com
CHAPTER 13 INTEROPERABILITY
Decode Data Matrix ECC200 In Visual Basic .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
DataMatrix Encoder In None
Using Barcode creator for Online Control to generate, create Data Matrix image in Online applications.
www.OnBarcode.com
void throw_native_exception(bool byval) { if (byval) throw NativeException(L"Native Exception By Value"); else throw new NativeException(L"Native Exception on Native Heap"); } #pragma managed int main() { bool byval = true; try { throw_native_exception(byval); } catch(NativeException& native_exception) { wprintf(L"Caught NativeException: %s\n", native_exception.GetMessage()); } catch(SEHException^ e) { Console::WriteLine("{0}\nErrorCode: 0x{1:x}", e->ToString(), e->ErrorCode); } byval = false; try { throw_native_exception(byval); } catch(NativeException* native_exception) { wprintf(L"Caught NativeException: %s\n", native_exception->GetMessage()); } catch(SEHException^ e) { Console::WriteLine("{0}\nErrorCode: 0x{1:x}", e->ToString(), e->ErrorCode); } }
PDF-417 2d Barcode Decoder In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
QR Code Creation In Objective-C
Using Barcode generation for iPad Control to generate, create Quick Response Code image in iPad applications.
www.OnBarcode.com
CHAPTER 13 INTEROPERABILITY
Encode EAN128 In None
Using Barcode generation for Online Control to generate, create UCC.EAN - 128 image in Online applications.
www.OnBarcode.com
QR Code Generator In Java
Using Barcode creation for Java Control to generate, create QR Code JIS X 0510 image in Java applications.
www.OnBarcode.com
The output of Listing 13-26 is shown here: Caught NativeException: Native Exception By Value Caught NativeException: Native Exception on Native Heap
Create ECC200 In Java
Using Barcode drawer for Android Control to generate, create ECC200 image in Android applications.
www.OnBarcode.com
UCC - 12 Generation In Objective-C
Using Barcode printer for iPhone Control to generate, create UPC-A Supplement 5 image in iPhone applications.
www.OnBarcode.com
Interop with COM HRESULTs
Barcode Drawer In Java
Using Barcode creation for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Encoding Code 128 Code Set A In Visual Basic .NET
Using Barcode generator for .NET framework Control to generate, create Code 128 Code Set B image in .NET framework applications.
www.OnBarcode.com
A COM HRESULT is wrapped as an exception. It may appear as a specific exception type, such as OutOfMemoryException for the HRESULT E_OUTOFMEMORY, or, if there is no specific mapping provided, as a COMException, which has an ErrorCode property that has the original HRESULT value.
PDF-417 2d Barcode Printer In Java
Using Barcode printer for BIRT reports Control to generate, create PDF 417 image in Eclipse BIRT applications.
www.OnBarcode.com
Code 39 Scanner In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Summary
This chapter covered various aspects of interoperability interop with other .NET languages, interop with native code including P/Invoke, the various compilation modes available, and how to expose native code to other .NET languages. The text touched briefly on COM interop. You learned about the marshaling library, which simplifies conversions between native and managed types. You also saw pointer types useful in interop, such as interior_ptr and pin_ptr, native and managed entry points, the __clrcall calling convention, double thunking and how to avoid it, how to include a native class in a managed class, how to include a managed class in a native class with gcroot and auto_gcroot, and finally, how exceptions and errors in native code surface in managed code. This completes our study of the foundations of the C++/CLI language extensions. Of course, there is much more to learn about the .NET Framework and programming for the CLR, and there are numerous libraries to explore. Now that you have learned enough to get started with C++/CLI code and interoperability technologies, you ll want to apply this knowledge to your own domain, whether that s creating a hybrid MFC and WPF application, writing a game, or simply using a legacy native library in your managed application. You ll want to keep this book handy as a reference to the core language as you apply this technology to your own unique programs. I ve included a few additional notes in the appendix and a syntax summary that should be helpful when writing C++/CLI code.
APPENDIX
Quick Reference
his appendix covers the new keywords introduced in C++/CLI, specifies which are also reserved words, and defines and lists contextual keywords and whitespace keywords. This appendix includes a reference table for features available in native, mixed, pure, and safe modes. You ll also find a summary of the syntax introduced in C++/CLI.
Copyright © OnBarcode.com . All rights reserved.