How to bypass function parameters in C#?

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I am looking for ways to bypass function parameters. Assume i have a function:

void getDataFromDB(int? ID, string name) {....}

I would like to know the ways bypassing ID or name, smt like this:

entity.getDataFromDB(42);

or

entity.getDataFromDB("Customer");

I won't call function like this:

entity.getDataFromDB(null,"Customer");

I know i can use default values also i can use params for the last parameter. Any good ideas?

C# has two ways to reduce function parameters:

default values (works only if no "standard" parameter follows):

void getDataFromDB(int? ID, string name = "Default") {....}

Method overloads:

void getDataFromDB(int? ID, string name) {....} 
void getDataFromDB(string name) => getDataFromDB(null, name); // overload using lambda

Parameter Passing Techniques in C/C++, There are different ways in which parameter data can be passed into and out of methods and functions. Let us assume that a function B() is called from another  In C#, arguments can be passed to parameters either by value or by reference. Passing by reference enables function members, methods, properties, indexers, operators, and constructors to change the value of the parameters and have that change persist in the calling environment.

combine named and optional might help.

void getDataFromDB(int? ID = null, string name = null) {....}

allows

getDataFromDB(ID:42);
getDataFromDB(name:"eric");

Different ways to make Method Parameter Optional in C, Skip to content In C#, there are 4 different types of implementation of optional parameters are available as follows: In default value method, when you do not pass the value of the optional in C# · How to make a balloon ToolTip window in C#? · Difference between Method Overriding and Method Hiding in C# · C# | Uri. A reference parameter is a reference to a memory location of a variable. When you pass parameters by reference, unlike value parameters, a new storage location is not created for these parameters. The reference parameters represent the same memory location as the actual parameters that are supplied to the method.

From what it looks like, you are looking to get data either by name or id (and not both). If that is the case, then these are two distinct operations in my mind which can be solved by method overloading like this:

void getDataFromDB(int id) { … }

void getDataFromDB(string name) { … }

If there is common code between the above two methods then you can keep the common code separate and call from each method.

Personally, I would avoid nullableparameters as we then need to put additional null checks in our method. It open doors for potential bugs.

How to Skip Parameter in C#, Since I have one main function to print subtitles, I used parameters. protected void BypassSubtitle(string text,  Method signatures. Methods are declared in a class or struct by specifying: An optional access level, such as public or private. The default is private. Optional modifiers such as abstract or sealed. The return value, or void if the method has none. The method name. Any method parameters. Method parameters are enclosed in parentheses and are separated by commas.

Functions with Variable Argument Lists (C++), Function declarations in which the last member of is the ellipsis () can take a variable number of arguments. In these cases, C++ provides type  When a method in a subclass has the same name, same parameters or signature and same return type(or sub-type) as a method in its super-class, then the method in the subclass is said to override the method in the super-class. Method overriding is one of the ways by which C# achieve Run Time Polymorphism(Dynamic Polymorphism).

C# 2005 Programmer's Reference, The method's type parameters are in scope throughout the method t rac t El v i rtua 1 El override Signature matching rules are used when matching methods to a that method cannot specify any type —parameter —c ons traint s —c lauses,​  Method Parameters (C# Reference) 07/20/2015; 2 minutes to read +3; In this article. Parameters declared for a method without in, ref or out, are passed to the called method by value. That value can be changed in the method, but the changed value will not be retained when control passes back to the calling procedure.

Data Structures and Algorithms in C++, The shell sort first sorts the individual d skip arrays using insertion sort, this The function takes four parameters — bufis a pointer to integer that points to the  Passing single-dimensional arrays as arguments. You can pass an initialized single-dimensional array to a method. For example, the following statement sends an array to a print method. C#. int[] theArray = { 1, 3, 5, 7, 9 }; PrintArray (theArray); The following code shows a partial implementation of the print method. C#.

Comments
  • Do you have control over the methods? You can make parameters optional but if you cant modify the source you have to pass something
  • Why I won't call function like this:? It sounds like this function has more than a single responsibility.. If you can change the method it will be helpful if you share the code of that method
  • you can use named arguments with optionals,
  • Sounds like simple overloads of the method should be just what you want. Assuming you have control over the method source.