C# Inheritance: How to invoke the base class constructor when i call the derived class constructor

Question

I am trying to figure out how to invoke a base class constructor when I call the derived class constructor.

I have a class called "AdditionalAttachment" which is inherited from System.Net.Mail.Attachment.I have added 2 more properties to my new class so that i can have all the properties of existing Attachment class with my new properties

public class AdditionalAttachment: Attachment { [DataMember] public string AttachmentURL { set; get; } [DataMember] public string DisplayName { set; get; } }

Earlier i used to create constructor like

//objMs is a MemoryStream object

Attachment objAttachment = new Attachment(objMs, "somename.pdf")

I am wondering how can I create the same kind of constructor to my class which will do the same thing as of the above constructor of the base class

Duplicate by about 2 weeks: stackoverflow.com/q/4296888/492

CAD bloke
– CAD bloke

2013-11-08 09:20:44 +00:00
Commented Nov 8, 2013 at 9:20 — CAD bloke
– CAD bloke, Commented Nov 8, 2013 at 9:20

Mark Avenius · Accepted Answer · 2010-12-14 22:04:09Z

This will pass your parameters into the base class's constructor:

public AdditionalAttachment(MemoryStream objMs, string displayName) : base(objMs, displayName) { // and you can do anything you want additionally // here (the base class's constructor will have // already done its work by the time you get here) }

Mark Byers · Accepted Answer · 2010-12-14 22:04:24Z

You can write a constructor that calls the class base constructor:

public AdditionalAttachment(MemoryStream objMs, string filename) : base(objMs, filename) { }

Somnath Muluk · Accepted Answer · 2012-03-23 18:43:14Z

7

Use this function:

public AdditionalAttachment(MemoryStream ms, string name, etc...) : base(ms, name) { }

edited Mar 23, 2012 at 18:43

Somnath Muluk

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answered Dec 14, 2010 at 22:05

Sebastian Piu

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Comments

Itay Karo · Accepted Answer · 2010-12-14 22:04:21Z

public class AdditionalAttachment: Attachment { public AdditionalAttachment(param1, param2) : base(param1, param2){} [DataMember] public string AttachmentURL { set; get; } [DataMember] public string DisplayName { set; get; } }

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