Strongly typed asp.net data binding improved version 2nd

Related articles: teach you 30 seconds to build strong type ASP.net data binding, strongly typed ASP.net data binding improved edition

There is a problem with the previous approach:

Ivony ... "It's not good to write an eval method for each type," says one. ”

Kingthy said: "So there are func everywhere, will it be too far?" ”

"The methods to be used anywhere in the project should be collected in the core-level DLL as an extension method," Li Yongjing said. ”

If you use the extension method to solve this problem, we will face new problems, see extension methods:

public static Class Binder
{
public static TResult eval<tentity, tresult> (this System.Web.UI.Page p,
Func<tentity, tresult> Func)
{
return func ((tentity) P.getdataitem ());
}
}

The problem is that when you call, you need to specify the return type, such as:

<%# this. Eval<newsinfo, string> (n => n.title)%>

There is another way to solve this problem with the following code:

public static class binder<tentity> where Tentity:class
{
public static TResult eval<tresult> (System.Web.UI.Page p,
Func<tentity, tresult> Func)
{
return func ((tentity) P.getdataitem ());
}
}

The calling code is as follows:

<%# Binder<newsinfo> Eval (this, n => n.title)%>

Is there a better solution? I can only find this method at present, I 211.html "> think the ideal calling method should be:

<%# eval<newsinfo> (n => n.title)%>