Can someone explain what the C# “Func” does?

Question

I\'m reading the Pro MVC 2 book, and there is an example of creating an extension method for the HtmlHelper class.

Here the code example:

public stat         


        

Answer 1

Have a blog post on this. Using Func you can resolve some of functional discrepancy. Read here.

Answer 2

I have implemented a where() extension method using Func please have a look...

public static IEnumerable<Tsource> Where<Tsource> ( this IEnumerable<Tsource> a , Func<Tsource , bool> Method )
{

    foreach ( var data in a )
    {
        //If the lambda Expression(delegate) returns "true" Then return the Data. (use 'yield' for deferred return)
        if ( Method.Invoke ( data ) )
        {
            yield return data;
        }
    }
}

You can use it like,

        foreach ( var item in Emps.Where ( e => e.Name == "Shiv" ).Select ( e1 => e1.Name ) )
        {
            Console.WriteLine ( item );
        }