5 Essential Elements For properties

5 Essential Elements For properties

Blog Article

The above code consists of a bug though. If code updates the value of either the FirstName or LastName residence, the previously evaluated fullName area is invalid. You modify the established accessors with the FirstName and LastName residence so that the fullName industry is calculated again:

The preceding example calls for callers to use the constructor that features the FirstName parameter. Callers cannot use item initializers to assign a value to the house. To assistance initializers, you can make the established accessor an init accessor, as revealed in the subsequent code:

The preceding code will make two additions to the individual course. First, the FirstName residence declaration incorporates the essential modifier. That means any code that makes a brand new Person need to set this home.

Both equally the get as well as established accessor can be executed as expression-bodied customers. In cases like this, the get and established keywords has to be current. The next case in point illustrates the usage of expression human body definitions for both equally accessors. The return search phrase is just not made use of Along with the get accessor.

Which is the basics from the syntax. There are many alternative versions that support many diverse style and design idioms. Let us check out, and discover the syntax options for Every.

If a assets has both equally a get plus a set (or maybe a get and an init) accessor, equally must be auto-carried out. You determine an auto-applied house by utilizing the get and established key phrases without the need of offering any implementation.

Once again, implementing INotifyPropertyChanged is definitely an example of a scenario in which you can generate code inside your properties accessors to help the eventualities you need.

Properties are first-class citizens in C#. The language defines syntax that enables developers to jot down code that properly expresses their design and style intent.

It is also legal to position the more restrictive modifier on the get accessor. As an example, you might have a community home, but restrict the get accessor to personal. That circumstance isn't accomplished in follow.

You can extend this very same syntax to anything wanted in the state of affairs. It is possible to Check out the relationships amongst distinctive properties, or validate towards any external circumstances. Any valid C# statements are legitimate in the residence accessor.

Assets accessors generally encompass solitary-line statements that just assign or return the results of an expression.

The next example illustrates this sample. In this example, the TimePeriod class signifies an interval of time. Internally, the class retailers time interval in seconds in A personal discipline named _seconds. A go through-publish property named Hours enables the customer to specify some time interval in hours.

Both equally the get and the established accessors conduct the mandatory conversion among several hours and seconds. Moreover, the established accessor validates the data and throws an ArgumentOutOfRangeException if the amount of hours is invalid.

You could possibly prefer the Original benefit for that FirstName house for being the empty string rather than null. You'll specify that as proven below:

This method functions for any attribute you connect to the backing subject on the car-executed property.