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POHow do I use :base() and :this() correctly?
 

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  1. POHow do I use :base() and :this() correctly?
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    <p>I've already searched about this issue both on SO and other websites but I haven't managed to find (or come to) a solution for my case.</p> <p>I have an abstract class called <code>EnteBase</code>, which I use as a base (<em>duh!</em>) for other two classes, <code>Regione</code> and <code>Provincia</code>.</p> <hr> <p><strong><code>EnteBase</code></strong>:</p> <pre><code>public abstract class EnteBase { public EnteBase () : this( "Sconosciuto", 0 ) { } public EnteBase ( string nome ) : this( nome, 0 ) { } public EnteBase ( string nome, int numeroComuni ) { this.Nome = nome; this.NumeroComuni = numeroComuni; } private string nome; public string Nome { [...] } private int numeroComuni; public int NumeroComuni { [...] } } </code></pre> <hr> <p><strong><code>Regione</code></strong>:</p> <pre><code>public class Regione : EnteBase { public List&lt;Provincia&gt; Province { [...] } public Regione () : base() { this.Province = new List&lt;Provincia&gt;(); } public Regione ( string nome ) : this() { } public Regione ( string nome, int numeroComuni ) : this() { } public void AggiungiProvincia ( Provincia provincia ) { Province.Add( provincia ); } } </code></pre> <hr> <p><strong><code>Provincia</code></strong>:</p> <pre><code>public class Provincia : EnteBase { private string sigla; public string Sigla { [...] } public Provincia () : base() { } public Provincia ( string nome ) : this() { this.Nome = nome; } public Provincia ( string nome, int numeroComuni ) : this() { this.Nome = nome; this.NumeroComuni = numeroComuni; } public Provincia( string nome, int numeroComuni, string sigla) : this() { this.Nome = nome; this.NumeroComuni = numeroComuni; this.Sigla = sigla; } } </code></pre> <hr> <p>My questions are the following:</p> <ul> <li>Is it correct to use <code>:this()</code> in all constructors of the base class except the one with most parameters, with the others pointing towards the latter?</li> <li>Is it correct to use <code>:this()</code> pointing to the base constructor in the classes <code>Provincia</code> and <code>Regione</code> and then assign to the fields from inside the method itself?</li> </ul> <p>My problem rooted from the fact that I wanted to use both <code>:this()</code> and <code>:base()</code> in every method. When I discovered that it was not possible I looked for a solution, but I couldn't find a way to apply what I saw in <a href="https://stackoverflow.com/questions/3797528/base-and-this-constructors-best-practices">this question</a> and <a href="https://stackoverflow.com/questions/3146152/c-if-a-class-has-two-constructors-what-is-the-best-way-for-these-constructors">this one</a>.</p> <p><strong>P.S.:</strong> in constructors, is it preferred to use <code>this.FieldName</code> or just <code>FieldName</code>?</p>
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    1. USGabriele Cirulli
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    1. COI think you forgot to copy the field initialization into the `Regione` constructor.
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      1. POHow do I use :base() and :this() correctly?
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    2. CO@hvd Thank you, I accidentally left that out
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      1. POHow do I use :base() and :this() correctly?
      1. USGabriele Cirulli
 

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