Getter without body, Setter with

c# automatic-properties
colmde picture colmde · May 23, 2016 · Viewed 9.6k times · Source

I have a property which is currently automatic.

public string MyProperty { get; set; }

However, I now need it to perform some action every time it changes, so I want to add logic to the setter. So I want to do something like:

public string MyProperty {
    get;
    set { PerformSomeAction(); }
}

However, this doesn't build... MyProperty.get' must declare a body because it is not marked abstract, extern, or partial

I can't just have the getter return MyProperty as it will cause an infinite loop.

Is there a way of doing this, or do I have to declare a private variable to refer to? I'd rather not as MyProperty is used through out the code both in this class and outside it

Answer

Marius picture Marius · May 23, 2016

You need to use a property with backing field:

private string mMyProperty;
public string MyProperty
{
    get { return mMyProperty; }
    set
    {
        mMyProperty = value;
        PerformSomeAction();
    }
}

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