Define and Execute Dynamic Methods

Question

private ComplexAdvertismentsQuery QueryForm1(string searchQuery)
private ComplexAdvertismentsQuery QueryForm2(string searchQuery)
private ComplexAdvertismentsQuery QueryForm3(string searchQuery)
private ComplexAdvertismentsQuery QueryForm4(string searchQuery)
...

then i check

query = QueryForm1(searchQuery);
if (query != null)
{
}

query = QueryForm2(searchQuery);
if (query != null)
{
}

can i make this dynamic?

i look here http://msdn.microsoft.com/en-us/library/exczf7b9.aspx and try with Type but this is not class it is jut method.

I think you need to add a lot more context to this question; there are definitely people here who can give you DynamicMethod examples, but it is meaningless unless the question is very clear. — Marc Gravell
– Marc Gravell, Commented Jan 19, 2011 at 8:23
Calling methods through reflection can slow your program down. Wouldn't it be more useful to have an array of Func<string, ComplexAdvertismentsQuery> and iterate on it ? — Nekresh
– Nekresh, Commented Jan 19, 2011 at 8:38
@senzacionale, its not clear what you want to achieve by dynamic invocation here. Perhaps you should look at the way suggested by Nekresh. — VinayC
– VinayC, Commented Jan 19, 2011 at 8:43
i solve the problem by this example sadi02.wordpress.com/2008/05/14/… — senzacionale
– senzacionale, Commented Jan 19, 2011 at 9:26

Nekresh · Accepted Answer · 2011-01-19 08:43:05Z

1

You can do that with an array of strong-typed delegates and iterate on it to execute all your methods.

var listOfQueries = new List<Func<string, ComplexAdvertismentsQuery>> {
  QueryForm1, QueryForm2, QueryForm3, QueryForm4
};

foreach (var queryForm in listOfQueries) {
  var query = queryForm(searchQuery);

  if (query != null) {
    // do something
  }
}

If needed, you can populate the list by used reflection and get the corresponding delegate for each one, and pay the cost for reflection only once.

The drawback of this method is that all your methods must have the same prototype (ComplexAdvertismentsQuery method(string) here).

answered Jan 19, 2011 at 8:43

Nekresh

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