asp.net display barcode font R::f in Visual C#.NET

Generation ECC200 in Visual C#.NET R::f

R::f
Create Data Matrix In Visual C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create Data Matrix ECC200 image in .NET framework applications.
www.OnBarcode.com
Data Matrix Reader In Visual C#
Using Barcode reader for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
In Listing 9-8, the function f in the class R implements both I1 s and I2 s version of f. This might be desirable if the function that has the conflict has the same meaning in both interfaces,
Create Code128 In C#.NET
Using Barcode generator for .NET framework Control to generate, create Code 128C image in .NET framework applications.
www.OnBarcode.com
Print PDF417 In Visual C#
Using Barcode creation for Visual Studio .NET Control to generate, create PDF417 image in Visual Studio .NET applications.
www.OnBarcode.com
CHAPTER 9 IN TERFA CES
UPC Code Creation In C#.NET
Using Barcode generation for .NET framework Control to generate, create GS1 - 12 image in VS .NET applications.
www.OnBarcode.com
Code 39 Extended Generation In Visual C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create USS Code 39 image in .NET framework applications.
www.OnBarcode.com
but if the interfaces have different notions of what f means and does, you need to explicitly implement the functions inherited from each interface separately. The language provides support for doing this, as in Listing 9-9. Listing 9-9. Implementing Inherited Functions Separately // explicit_interface_implementation.cpp using namespace System; interface class I1 { void f(); }; interface class I2 { void f(); }; ref class R : I1, I2 { public: virtual void f1() = I1::f { Console::WriteLine("R::f1 == I1::f"); } virtual void f2() = I2::f { Console::WriteLine("R::f2 == I2::f"); } }; int main() { R^ r = gcnew R(); I1^ i1 = r; I2^ i2 = r; r->f1(); r->f2(); // r->f(); i1->f(); i2->f(); // r->I1::f(); // r->I1::f1(); } // OK -- call through the object. // OK -- call through the object. // Error: f is not a member of R. // OK -- call f1. // OK -- call f2. // Compiler error: "direct call will fail at runtime". // Error: f1 is not a member of I1.
EAN 128 Maker In Visual C#.NET
Using Barcode maker for .NET framework Control to generate, create UCC-128 image in .NET framework applications.
www.OnBarcode.com
Making ISSN - 13 In Visual C#.NET
Using Barcode drawer for .NET Control to generate, create International Standard Serial Number image in VS .NET applications.
www.OnBarcode.com
CHAPTER 9 INTE RFA CES
Data Matrix ECC200 Scanner In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Scanning ECC200 In .NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
The final two calls are not supported. The output of Listing 9-9 is as follows: R::f1 R::f2 R::f1 R::f2 == == == == I1::f I2::f I1::f I2::f
Creating Matrix Barcode In Java
Using Barcode encoder for Java Control to generate, create Matrix image in Java applications.
www.OnBarcode.com
EAN 13 Reader In .NET Framework
Using Barcode reader for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Interfaces and Access Control
Barcode Decoder In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Generating QR Code JIS X 0510 In VS .NET
Using Barcode creator for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
www.OnBarcode.com
You can also force a method to be available only through an interface, and not as a method on the object instance. Using explicit implementation syntax, you set up a private method that explicitly implements the interface method. Attempting to call the method outside the class through the class handle or object will produce a compile error. The method may be called through the interface without error (see Listing 9-10). Listing 9-10. Using a Private Method to Implement an Interface // interface_private.cpp interface class IInterface { void f(); int g(); }; ref class R : IInterface { // The virtual keyword is required to implement the interface. virtual void f() sealed = IInterface::f { } public: virtual int g() { return 1; } }; int main() { R^ r = gcnew R(); IInterface^ ir = r; ir->f(); // f may be called through the interface. // r->f(); r->g(); } // Error: f is private. // OK
Draw Code 128B In Visual Basic .NET
Using Barcode printer for Visual Studio .NET Control to generate, create ANSI/AIM Code 128 image in VS .NET applications.
www.OnBarcode.com
UPC-A Supplement 2 Generator In VS .NET
Using Barcode generation for .NET framework Control to generate, create UPC-A image in VS .NET applications.
www.OnBarcode.com
CHAPTER 9 IN TERFA CES
Paint EAN-13 In None
Using Barcode generation for Microsoft Excel Control to generate, create EAN13 image in Office Excel applications.
www.OnBarcode.com
EAN-13 Maker In None
Using Barcode encoder for Font Control to generate, create EAN 13 image in Font applications.
www.OnBarcode.com
Interfaces and Static Members
PDF 417 Maker In None
Using Barcode drawer for Office Excel Control to generate, create PDF-417 2d barcode image in Office Excel applications.
www.OnBarcode.com
UCC-128 Generation In Java
Using Barcode drawer for Java Control to generate, create EAN / UCC - 14 image in Java applications.
www.OnBarcode.com
In addition to virtual methods, interfaces may have static methods and static fields. Code like that in Listing 9-11 is legal. Static methods on interfaces are nonvirtual, like all static methods, so if your implementing class also defines a method with the same name, it is a different method. Which method gets called depends on how the method is accessed. Listing 9-11. Interfaces with Static Fields and Methods // interfaces_static.cpp using namespace System; interface class IA { static int i = 6; static const int j = 100; static void f() }; ref class A : IA { public: static void f() { Console::WriteLine("A::f " + IA::j); } }; int main() { A^ a = gcnew IA^ ia = a; ia->f(); a->f(); IA::f(); A::f(); a->IA::f(); } { Console::WriteLine("IA::f " + i); }
A(); // // // // // Call Call Call Call Call IA::f through interface handle. A::f through object handle. IA::f. A::f. IA::f.
Here is the output of Listing 9-11: IA::f 6 A::f 100 IA::f 6 A::f 100 IA::f 6
CHAPTER 9 INTE RFA CES
Literals in Interfaces
Interfaces may have literal fields, but not nonstatic constant fields. Recall from 6 that static constant fields do not appear constant to assemblies that import the constants via #using, whereas literal fields do appear constant in that case (see Listing 9-12). Listing 9-12. Using Literals in Interfaces // interfaces_constants.cpp interface class I { static const int i = 100; literal int j = 50; // const int k; };
Copyright © OnBarcode.com . All rights reserved.