C# Programming :: Named parameters


	Named parameters Is it possible to make use of named parameters outside of Attribute? If so how :) Thanks in advance. Paul <paul.tho@corpoflondon.gov.uk> wrote: > Is it possible to make use of named parameters outside of Attribute? > If so how :) What exactly are you after? C# only supports positional parameters for methods, if that's what you mean. -- Jon Skeet - <s@pobox.com> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet If replying to the group, please do not mail me too -----------------------------------------------Reply----------------------------------------------- "Paul" <paul.tho@corpoflondon.gov.uk> wrote: > Is it possible to make use of named parameters outside of Attribute? > If so how :) C# 3.0, which ships this year, brings what you're looking for - they're called Object Initializers. You can read all about them at: http://blogs.msdn.com/wriju/archive/2007/04/12/c-3-0-enhancements-obj... This is something that I've missed for a while too, as I quite like doing it with Attributes. -- Chris Mullins, MCSD.NET, MCPD:Enterprise, Microsoft C# MVP http://www.coversant.com/blogs/cmullins -----------------------------------------------Reply----------------------------------------------- Thanks, I have seen a demo of that at the last DevWeek. It does look good. Paul -----------------------------------------------Reply----------------------------------------------- This isn't named parameters though. It allows you to set accessible properties/fields after using new to construct the object. Very different things. -- - Nicholas Paldino [.NET/C# MVP] - m@spam.guard.caspershouse.com "Chris Mullins [MVP]" <cmull@yahoo.com> wrote in message news:%23kgzP25pHHA.1148@TK2MSFTNGP06.phx.gbl... - Hide quoted text - > "Paul" <paul.tho@corpoflondon.gov.uk> wrote: >> Is it possible to make use of named parameters outside of Attribute? >> If so how :) > C# 3.0, which ships this year, brings what you're looking for - they're > called Object Initializers. You can read all about them at: > http://blogs.msdn.com/wriju/archive/2007/04/12/c-3-0-enhancements-obj... > This is something that I've missed for a while too, as I quite like doing > it with Attributes. > -- > Chris Mullins, MCSD.NET, MCPD:Enterprise, Microsoft C# MVP > http://www.coversant.com/blogs/cmullins I do like the feature, but don't see at the moment that it actually saves much typing other then a newline or so and in some ways can be a bit harder to look at. Being able to stick more on one line does not equal clearer code imo: c = new C() c.Name1 = "name"; -vs- c= new C(){Name1="name"} What are all the advantages? -- William Stacey [C# MVP] "Chris Mullins [MVP]" <cmull@yahoo.com> wrote in message news:%23kgzP25pHHA.1148@TK2MSFTNGP06.phx.gbl... \| "Paul" <paul.tho@corpoflondon.gov.uk> wrote: \| > Is it possible to make use of named parameters outside of Attribute? \| > \| > If so how :) \| \| C# 3.0, which ships this year, brings what you're looking for - they're \| called Object Initializers. You can read all about them at: \| http://blogs.msdn.com/wriju/archive/2007/04/12/c-3-0-enhancements-obj... \| \| This is something that I've missed for a while too, as I quite like doing it \| with Attributes. \| \| -- \| Chris Mullins, MCSD.NET, MCPD:Enterprise, Microsoft C# MVP \| http://www.coversant.com/blogs/cmullins \| \| \| -----------------------------------------------Reply----------------------------------------------- It saves some typing when adding it to a List :). List<C> lst = new List<C>(); lst.Add(new C(){Name1="name0"} ); lst.Add(new C(){Name1="name1"} ); lst.Add(new C(){Name1="name2"} ); lst.Add(new C(){Name1="name3"} ); -----------------------------------------------Reply----------------------------------------------- Maybe... personally I've never had any problem with the 2 existing patterns (below). It is a little more succinct, but not a lot... lst.Add(new C("name0")); // if a suitable ctor exists // or lst.Add(CreateC("name0")); // if some (locally-specific-set-of) properties must be used // ... (the following implementation-(rather than type-) specific method is scoped to the class using it) private static C CreateC(string name) { C c = new C(); c.Name = name; return c; } "Michael Huber" <huberm@gmail.com> wrote in message news:1181118062.937094.55230@q66g2000hsg.googlegroups.com... - Hide quoted text - > It saves some typing when adding it to a List :). > List<C> lst = new List<C>(); > lst.Add(new C(){Name1="name0"} ); > lst.Add(new C(){Name1="name1"} ); > lst.Add(new C(){Name1="name2"} ); > lst.Add(new C(){Name1="name3"} ); oh thanks its very nice :) - Hide quoted text - "Chris Mullins [MVP]" wrote: > "Paul" <paul.tho@corpoflondon.gov.uk> wrote: > > Is it possible to make use of named parameters outside of Attribute? > > If so how :) > C# 3.0, which ships this year, brings what you're looking for - they're > called Object Initializers. You can read all about them at: > http://blogs.msdn.com/wriju/archive/2007/04/12/c-3-0-enhancements-obj... > This is something that I've missed for a while too, as I quite like doing it > with Attributes. > -- > Chris Mullins, MCSD.NET, MCPD:Enterprise, Microsoft C# MVP > http://www.coversant.com/blogs/cmullins