Multiple Constructors

Question

Hi How can I call multiple constructors for the following : class sample { string str_a; int int_b; sample() { /*Constructor - 1*/ } sample(string a) : this() { /*Constructor - 2*/ str_a = a; } sample(int b) : this() { /*Constructor - 3*/ int_b = b; } sample(string a int b) : this() { /*4th Constructor*/ } } How can I call the 123 constructors in 4th constructor in easy way.

Vulpes · Answer

The short answer to this question is that there isn't really an easy to do it. The 4th constructor can chain to either the 2nd or 3rd constructors but it can only pass one value to them and so any subsequent constructor chain will not know what the second value is! However you can circumvent this by combining both values into a single string value. To show that this works I've temporarily changed all members of the sample class to public: using System; class sample { public string str_a; public int int_b; public sample() { /*Constructor - 1*/ } public sample(string a) : this(int.Parse(a.Split(':')[1])) { a = a.Split(':')[0]; /*Constructor - 2*/ str_a = a; } public sample(int b) : this() { /*Constructor - 3*/ int_b = b; } public sample(string a int b) : this(a + : + b.ToString()) { /*4th Constructor*/ } } class Test { static void Main() { sample s = new sample(mahesh 1); Console.WriteLine({0} : {1} s.int_b s.str_a); Console.ReadKey(); } } Needless to say no-one would do stuff like this in practice only in interviews ;)

Ankit Nandekar · Answer

no need to create one more constructor just follow this logic it will call all constructors when u r calling default constructors class sample { string str_a; int int_b; sample ():this(ankit) { Console.WriteLine(1); /*Constructor - 1*/ } sample (string a) : this(1) { /*Constructor - 2*/ str_a = a; Console.WriteLine(2); } sample (int b) : this(ankit2) { /*Constructor - 3*/ int_b = b; Console.WriteLine(3); } sample (string a int b) { /*4th Constructor*/ Console.WriteLine(4); } static void Main(string[] args) { sample obj = new sample (); Console.ReadLine(); } }

Mayur Gujrathi · Answer

Whenever you create object of your class you have a chance to call it in this way sample obj=new sample();//call to your default constructor sample obj1=new sample(some string);//call to your second constructor sample obj2=new sample(10);//call to your third constructor sample obj3=new sample(10some string);//call to your fourth constructor for more refer my article http://www.c-sharpcorner.com/UploadFile/5eae74/6996/?ArticleID=7fb8bfa0-e538-4665-8c7f-0bfeb42e4455

Sam Hobbs · Answer

Create additional functions for doing whatever is in common and then call whatever needs to called to do what you need to do.