We could use named arguments to call the above method in any of the below ways:īecause both parameters are optional, in cases where only one (or zero) parameters is specified then the default value for any non-specified arguments is passed. For example, below we have a method DoSomething that takes two optional parameters: Named arguments come in very useful when a method supports multiple optional parameters, and you want to specify which arguments you are passing.
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This allows you to explicitly name an argument you are passing to a method – instead of just identifying it by argument position.įor example, I could write the code below to explicitly identify the second argument passed to the GetProductsB圜ategory method by name (making its usage a little more explicit): Named Arguments and Optional Parameters in C# 4.0Ĭ# 4.0 also now supports the concept of “named arguments”. Note that VS 2010’s Intellisense indicates when a parameter is optional, as well as what its default value is when statement completion is displayed: Or we can omit passing the second optional parameter – in which case the default value of 0 will be passed: In a statement issued recently, Foxconn said they had implemented a range of. Sajans wife, Kashmira is suspicious of his friendship with Sanjana. 415 Articles published by Sajan C Kumar Protest-hit Foxconn factory at Tamil Nadu resumes operations. Sajan Agarwal, works as a manager for an advertising company and is fascinated by his glamorous boss, Sanjana. When calling the above method we can explicitly pass two parameters to it: Starting tonight, is the new show, May I Come In Madam. The “pageIndex” parameter has a default value of 0, and as such is an optional parameter: For example, the method below takes two parameters – a “category” string parameter, and a “pageIndex” integer parameter. Parameters are optional when a default value is specified as part of a declaration. C# 4.0 now supports using optional parameters with methods, constructors, and indexers (note: VB has supported optional parameters for awhile).
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