Substitution for booleans in C#?

Question

Hi,
Is there substitution for booleans in C#? If bool 1 false then return bool 2 and the opposite? And what to do if there is more then two boolean values - Coalesce, NullIf...?
Thank you very much.
Art.

B List · Answer

This IF address1 is not null THEN result := address1; ELSIF address2 is not null THEN result := address2; ELSIF address3 is not null THEN result := address3; ELSE result := null; END IF; could translate to the following in C# (or C++) (I'm going to assume the addresses are of string type and you really mean blank when you indicate "null") string address1 = ""; string address2 = ""; string address3 = ""; string result; result = (address1.Length > 0) ? address1 : (address2.Length > 0) ? address2 : (address3.Length > 0) ? address3 : ""; The conditional operator (?) is often used as a shortcut to the if..else statement. Ex. if (A == 1) test = "A is 1" else test = "A is not 1"; is the same as test = (A == 1) ? "A is 1" : "A is not 1";

B List · Answer

Not sure if this is what you're after: int s = (w == null ) ? 0 : Convert .ToInt32(w); If not, then maybe give a brief overview of what you want to use the booleans for.

Jiteendra Sampathirao · Answer

You can declare the values what to you want. function asdasdad() { int s=someoperation; return s; } if (s==0) { //do something } if(s==1) { //do something } is(s==2) { //do something } You can assign it to strings also. If this post helped you, then tick the " Do you like this Answer" checkbox.

Sam Hobbs · Answer

I probably do not understand: if bool1 false then return bool2... else return bool1 but as best as I understand it, you can use: return (bool1 ? bool1 : bool2); However I think the following will produce the same results: return (bool1 || bool2);

Arthur · Answer

Thank you very much! This seems what I was looking for. Art.

Arthur · Answer

Thank you B List. Is this the correct syntax used in your example? It is a bit confusing to me... Any more examples would be appreciated. I'm looking for smth that would work lk this: if bool1 false then return bool2... else return bool1. I was hoping there is some kind of single line, no coding required function/method/statement in C# to do this. I can write if but trying to find out if there is an easier way to manipulate with values with minimal coding. I can only give some SQL example: SELECT coalesce ( address1, address2, address3 ) address FROM suppliers; This single line built-in SQL function is similar to what's below. With minimal coding as above one can do this: IF address1 is not null THEN result := address1; ELSIF address2 is not null THEN result := address2; ELSIF address3 is not null THEN result := address3; ELSE result := null; END IF; Thank you very much. Art

Arthur · Answer

Thank you for your help Jitendra! I learned about custom functions in C#. But is there a single line function/statement in C# that can do the same and be used with boolean types/expressions? I'm looking for smth similar to built-in SQL functions: NVL(string, replace_string) and/or Coalesce(expr1, expr2...... expr n)? Do I have to actually write my own functions for this? And if I have to write my own then how to program a single function/method that would work with numbers, strings and boolean types please? If number then return a number, string-string, bool- return t or f... If there is a built-in functionality in C# that can do the same please refer me to this and/or give some exact syntax examples please. Thank you very much. Art.

Substitution for booleans in C#?

Answers (7)