Automatically Implemented Propertie s in Visual C#.NET

Printer QR Code JIS X 0510 in Visual C#.NET Automatically Implemented Propertie s
Automatically Implemented Propertie s
Creating QR Code JIS X 0510 In C#.NET
Using Barcode generator for .NET Control to generate, create Quick Response Code image in VS .NET applications.
You should not use automatic properties as an excuse not to include validation code or other safety checks in your program If you need getters and setters, you should implement them Here is an example of placing the modi er before your setter:
Encode Bar Code In C#
Using Barcode generator for .NET Control to generate, create bar code image in Visual Studio .NET applications.
Technically there is a difference between having a private setter and creating a read-only property, but in practice the difference is not signi cant The following code will not compile because both accessors have modi ers:
Denso QR Bar Code Creator In .NET
Using Barcode creator for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
This code will not compile because it does not contain both a setter and a getter:
QR Generation In .NET
Using Barcode generator for VS .NET Control to generate, create Quick Response Code image in .NET applications.
The following property would be a poor candidate for an automatic property because it contains validation code that could not be easily implemented with automatic properties:
Encode QR Code ISO/IEC18004 In Visual Basic .NET
Using Barcode generator for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications.
In general, automatic properties are a simple feature, designed to help you get more work done with less code Use them with care, but use them
Generating Bar Code In C#.NET
Using Barcode generation for .NET Control to generate, create bar code image in .NET applications.
4: C# 30 Te chnical Over view
Create Barcode In C#
Using Barcode generator for .NET framework Control to generate, create barcode image in .NET applications.
Initializers
Code 39 Encoder In Visual C#.NET
Using Barcode printer for VS .NET Control to generate, create Code 39 image in Visual Studio .NET applications.
C# 30 includes two new ways to initialize the elements of a collection or the elds and properties of an object These techniques, called collection initializers and object initializers, are designed to help you write a more declarative style of code that is more succinct, easier to read, and easier to maintain Again, you were introduced to these topics earlier in the book, but they are covered in more depth here Later in this chapter, you will read about anonymous types, which use a technology closely related to object initializers
Drawing Code 128 Code Set B In Visual C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create Code 128A image in VS .NET applications.
Collection Initializers Collection initializers save typing and make code more readable They provide a means of quickly initializing any collection that implements and includes an method Consider this code fragment that creates and initializes a simple collection:
Making Data Matrix ECC200 In C#.NET
Using Barcode creator for .NET framework Control to generate, create Data Matrix image in .NET applications.
Because implements and has an method, you can use collection initializers to condense these four lines into one:
Scan ANSI/AIM Code 39 In Visual Studio .NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
The same simple technique can be used to initialize an array of integers:
Bar Code Encoder In VS .NET
Using Barcode generator for ASP.NET Control to generate, create barcode image in ASP.NET applications.
In either case, you can optionally include parentheses for a call to the default constructor:
Printing EAN / UCC - 14 In .NET
Using Barcode generation for ASP.NET Control to generate, create EAN / UCC - 13 image in ASP.NET applications.
Of course, other types have elements that can be initialized with this class: syntax Here is how to use collection initializers with the
Recognize Bar Code In VS .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in VS .NET applications.
Initializers
Generate Code 3 Of 9 In .NET Framework
Using Barcode encoder for ASP.NET Control to generate, create Code 3 of 9 image in ASP.NET applications.
A works almost exactly the same way Only the name of the object to be created differs:
Code 128 Code Set C Scanner In Visual Studio .NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
The rest of the code is identical Here is how to initialize and use
Draw Barcode In Visual Basic .NET
Using Barcode printer for .NET framework Control to generate, create bar code image in .NET applications.
You would not be able to use collection initializers with a , , or , because they have no methods Here, for : instance, is an attempt to use collection initializers with a
Drawing Code 3/9 In .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Code-39 image in Visual Studio .NET applications.
This code fails with the following error:
Create EAN13 In .NET Framework
Using Barcode drawer for .NET framework Control to generate, create European Article Number 13 image in VS .NET applications.
The important case of initializing a collection with a set of objects is shown in the next section In general, collection initializers are useful, easy to implement, and without signi cant drawbacks It is recommended that you use them whenever possible
Generate Code 128 Code Set B In .NET Framework
Using Barcode creator for ASP.NET Control to generate, create Code-128 image in ASP.NET applications.
4: C# 30 Te chnical Over view
Object Initializers C# 30 also provides a concise way to initialize one or more of the properclass declared in the secties or elds of an object Consider the tion called Automatically Implemented Properties:
Regardless of whether you used automatic properties, you can now initialclass with this simple syntax: ize an instance of the
Compare this with the old style of object initialization:
Clearly the new style is more succinct You may combine object and collection initializers in a single statement:
This code folds three object initializers inside a collection initializer Declarative syntax of this kind is both orderly and concise You can pass in parameters to the constructor of an object when using object initializers, and you can omit any properties you don t want to initialize:
Type s in C# 30
The initialization code in the method explicitly uses the property The same line of code calls a constructor of class that I ve also added an takes the integer value to initialize the method that is used in the call to I ve added optional it simply in the hopes that it will better help those who type in the code to understand what is happening Try changing the call to the constructor to pass in the number , and then check the result:
Types in C# 30
C# 30 introduced two major changes to the type system One is type inference, which allows the compiler to automatically infer the type of a variable The other is anonymous types, which allows you to declare a new type without explicitly giving it a name Both of these features play a signi cant role in LINQ