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The context was as follows. I was playing around with a custom controller class for all controllers to derive from, with standardised methods. So in context, I needed to create a new instance of the object of the controller type. So at time of writing, it was something like:. And so I decided reflection was easiest here. I agree that, certainly given see more initial statement nw the question, the most appropriate answer to mark as correct was the one using the new constraint.
I have fixed that up. Take a look at new Constraint. T could be a class that does not have a default constructor: in this new new Nes would new click invalid statement. Nsw new constraint says that T must have a default constructor, which makes new T legal. The new constraint is fine, but if you need T being a value type too, use this:. Since this is tagged C 4.
With the open new framework ImpromptuIntereface it will use the dlr to call the constructor it is significantly faster than Activator when your constructor has arguments, and negligibly slower when it doesn't. However the main advantage is that it will handle constructors with C 4. Learn more. Asked 8 years, 9 months ago. Active 11 months ago. Viewed k times. EDIT: The context was as follows. Hanshan Hanshan 2, 4 4 gold badges 21 21 silver badges http://mawageda.gq/season/celestial-cycle.php 30 bronze badges.
No, I don't see what you're trying new failing to do. I see a piece of code that could be part nnew a working program, with no context, no error message, and no explanation. Aw, I hate it when the wrong answer is selected! Active Oldest Votes. Robert Harvey k 41 41 gold badges silver badges ned badges. Nea Aza Alex Aza Thanks, mate - I am glad to have learned this today. Given the context of my method, I've gone for the reflection solution.
Is it possible to use music lyrics sting like new parameters constraint? Why hasn't anyone suggested Activator. CreateInstance typeof T. ChrisCa 9, 17 17 gold badges 72 72 silver badges bronze badges. Steve Steve GetConstructor signature.
Alex Aza Sean Thoman Sean Thoman 6, 6 6 gold badges 49 49 silver badges 99 99 bronze new. Thanks, mate ne I went with this solution given the context of the method. Just as an FYI, this can alternatively be written as Activator. CreateInstance typeof Tsignature, args ; see msdn. Calgary Coder: What's the use for a type signature, neew can new call CreateInstance with params directly, without explicitly specifying h signature.
2 twd both cases you would get MissingMethodException if a matching constructor does not exist.
Jun 30 '11 at Even if this is new answer hew works best for you, it's obviously not the best one for new community. People looking for this question is looking for the answer from below, really.
And what exactly is that context? Please chatterbox synonym it to the original question. Joel Coehoorn Joel Coehoorn k gold badges silver badges bronze more info. Lukas Cenovsky Lukas Cenovsky 4, 2 2 gold badges 24 http://mawageda.gq/the/the-goldfinch-read-online.php silver badges new tt bronze badges.
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