How can I invoke a different constructor from a constructor in c#? [duplicate]

Question

I have the following class

public class ReportDataSource : IReportDataSource { public string Name { get; set; } public string Alias { get; set; } public string Schema { get; set; } public string Server { get; set; } public ReportDataSource() { } public ReportDataSource(ReportObject obj) { this.Name = obj.Name; this.Alias = obj.Alias; this.Schema = obj.Schema; this.Server = obj.Server; } public ReportDataSource(ReportObject obj, string alias) { this.Name = obj.Name; this.Schema = obj.Schema; this.Server = obj.Server; this.Alias = alias; } }

In constructor ReportDataSource(ReportObject obj, string alias) behaves exactly as the ReportDataSource(ReportObject obj). The only different is that I can override the alias property.

Is there a way I can call ReportDataSource(ReportObject obj) from inside ReportDataSource(ReportObject obj, string alias) so I won't have to duplicate my code?

I tried this

 public ReportDataSource(ReportObject obj, string alias) :base(obj) { this.Alias = alias; }

but I get this error

'object' does not contain a constructor that takes 1 arguments

How can I call a different constructor from with in a constructor in c#?

AlexD · Accepted Answer · 2016-08-04 00:14:02Z

Try this:

public ReportDataSource(ReportObject obj, string alias) :this(obj) { this.Alias = alias; }

It is sometimes called constructor chaining.

An instance constructor initializer of the form this(argument-list_opt) causes an instance constructor from the class itself to be invoked. The constructor is selected using argument-list and the overload resolution rules of §7.5.3.

That worked! thank you. I'll accept your answer when time permits

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