Operators Instead Of IF ELSE

Question

public string Source       get                          if   Source    null                return string   Empty            else               return Source                               return Source    string Empty            set                          if   Source    null                 Source   string   Empty            else               if   Source    value                     Source   Source                else                   Source   value                                             Source    value   Source   value    string Empty          RaisePropertyChanged    Source               Can I use       operators EXACTLY as If Else     My Question   How to write the following with       operators      1    if   Source    null           Return Nothing   else       return Source        2    if   Source    value           Do Nothing   else       Source   value      RaisePropertyChanged    Source          Briefly   How to do nothing  return nothing and do multiple instructions with       operator

User · Answer

I don t think you can its an operator and its suppose to return one or the other   It s not if else statement replacement although it can be use for that on certain case

User · Answer

The  do nothing  doesn t really work for    if by    Return Nothing you actually mean return null then write  return Source    if you mean  ignore the codepath then write   if   Source    null                                 return Source                   source is null so continue on    And for the last   if   Source    value                 Source   value                  RaisePropertyChanged    Source                       nothing done

User · Answer

the    is the itinerary operator   believe i spelled that properly  and it s simple to use   as in a boolean predicate   iftrue   ifalse  But you must have a rvalue lvalue as in rvalue   predicate   iftrue  iffalse   ex int i   x  lt  7   x   7   if x was less than 7  i would get assigned x  if not i would be 7    you can also use it in a return  as in return x  lt  7   x   7   again  as above   this would have the same affect    so  Source   Source    value   Source   string Empty  i believe is what your trying to acheive

User · Answer

The ternary operator RETURNS one of two values  Or  it can execute one of two statements based on its condition  but that s generally not a good idea  as it can lead to unintended side-effects   bar        baz      In this case  the    does nothing  while baz does something  But you ve only made the code less clear  I d go for more verbose code that s clearer and easier to maintain   Further  this makes little sense at all   var foo   bar        baz      since    has no return type  it s void  and baz has a return type that s unknown at the point of call in this sample  If they don t agree  the compiler will complain  and loudly

User · Answer

The    Operator returns one of two values depending on the value of a Boolean expression   Condition-Expression   Expression1   Expression2   Find here more on    operator  also know as a Ternary Operator    http   net-informations com csprj statements cs-operator htm

User · Answer

If you are concerned with the verbosity of your code I would write this rather than trying to abuse expressions   if  Source    value  return  Source   value  RaisePropertyChanged  Source

User · Answer

For  1   you can t  these operators are made to return a value  not perform operations   The expression  a   b   c   evaluates to b if a is true and evaluates to c if a is false   The expression  b    c   evaluates to b if b is not null and evaluates to c if b is null   If you write  return a   b   c    or  return b    c    they will always return something   For  2   you can write a function that returns the right value that performs your  multiple operations   but that s probably worse than just using if else

User · Answer

The ternary operator      is not designed for control flow  it s only designed for conditional assignment   If you need to control the flow of your program  use a control structure  such as if else

User · Answer

Refering to    Operator  C  Reference      The conditional operator      returns   one of two values depending on the   value of a Boolean expression    Following is the syntax for the   conditional operator    Refering to    Operator  C  Reference      The    operator is called the   null-coalescing operator and is used   to define a default value for a   nullable value types as well as   reference types  It returns the   left-hand operand if it is not null    otherwise it returns the right   operand    That means    Part 1   return source    String Empty     Part 2  is not applicable

[c#] ?: ?? Operators Instead Of IF|ELSE

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