Creating a dynamic lambda method delegate

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Say we have a class like this :

C#

public class someclass
{ 
   public string Name;
   public string Address;
   public int Code;
}

Is there a way to create a method like this

C#

public delegate Insert(string Name, string Address, int Code);

Using lambda expressions at design/compile without code/template generation?

Posted 4-Feb-12 0:57am

Mehdi Gholam

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Amir Mahfoozi · Answer 1 · 2012-02-04T01:42:00

Solution 1

I think the answer of VirtualBlackFox will help you at this page :

http://stackoverflow.com/a/1575153[^]

CodeDOM documentation :
http://msdn.microsoft.com/en-us/library/y2k85ax6.aspx[^]

Hope it helps.

Posted 4-Feb-12 1:42am

Amir Mahfoozi

Martin Arapovic · Answer 2 · 2012-02-04T02:10:00

Hi,

I think you can use Action [^] and Func[^] predefined delegates.

Using them looks like this:

C#

Func<string,> insert = (Name, Address, Code) => 
		{
			// Do something with Name, Address and Code
			return String.Format("Data inserted:[Name={0}; Address={1}; Code={2}]", Name, Address, Code);
		};
	
	string result = insert("Martin Arapovic", "Split, Croatia", 100);
	
	Console.WriteLine(result);

Actually this can be done in design time, but to use it in runtime I think you will work with ExpressionTrees:
1. http://www.thejoyofcode.com/Lambda_and_Expression_Trees.aspx[^]
2. http://msdn.microsoft.com/en-us/library/bb397951.aspx[^]
3.http://www.abhisheksur.com/2010/09/use-of-expression-trees-in-lamda-c.html[^]
3. http://blogs.msdn.com/b/csharpfaq/archive/2009/09/14/generating-dynamic-methods-with-expression-trees-in-visual-studio-2010.aspx[^]