About properties

About properties

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The illustrations over showed one among the simplest conditions of house definition: a go through-write assets without any validation. By creating the code you desire within the get and established accessors, it is possible to generate a number of scenarios.

The previous illustration necessitates callers to make use of the constructor that features the FirstName parameter. Callers can not use object initializers to assign a worth for the property. To assist initializers, you may make the established accessor an init accessor, as proven in the next code:

Up thus far, all of the house definitions you may have found are read through/publish properties with general public accessors. That is not the only real legitimate accessibility for properties. It is possible to generate go through-only properties, or give various accessibility into the established and obtain accessors.

syntax to determine approaches that consist of one expression. Below, that expression returns the complete title for the person item.

Now, the FirstName assets could be accessed from any code, but it really can only be assigned from other code in the Person class.

It will toss a NullReferenceException without having this sign in that case. For more information, see events. This instance also works by using the new nameof operator to convert from your house name image to its textual content illustration. Employing nameof can reduce glitches where you've mistyped the identify in the house.

It is possible to generate code during the established accessor to make certain that the values represented by a residence are always valid. For instance, suppose one particular rule for the Person course is that the name can't be blank or white space. You'd probably generate that as follows:

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. This feature enables details properties to become accessed conveniently and even now allows encourage the safety and flexibility of techniques.

Particular initialization is most beneficial for examine-only properties, as you'll see afterwards in this article.

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A ultimate situation where by you need to produce code in a assets accessor is to help the INotifyPropertyChanged interface employed to notify facts binding purchasers that a worth has modified. When the value of the house alterations, the thing raises the INotifyPropertyChanged.

Callers need to possibly use the constructor with SetsRequiredMembers or set the FirstName home utilizing an object initializer, as proven in the following code: