C# Event Handlers and Delegates

C# Event Handlers and Delegates in ASP .Net with Web User Controls

This article should help as a general how to on event handlers and delegates in C# as well as propose a different way to handle cross page methods in your ASP .Net website from a web user control or other page.

Create event handlers and their delegates in the user control, fire them from the methods tied to the internal controls protected events, and define the methods that will handle the new events in the page (see code below).

This article should help as a general how to on event handlers and delegates in C# as well as propose a different way to handle cross page methods in your ASP .Net website from a web user control or other page.

How to Detect Errors of Our ASP.NET MVC Views on Compile Time

I have simple ASP.NET MVC 4 internet application which we get out of the box (Things that I will show can be applied with ASP.NET MVC 3 as well). Then I will put a bug inside the index view of my home controller :

@{
    var poo = "bar"
    }

<h3>We suggest the following:</h3>

As you can see it is not a valid code. So it should fail on both compile time and runtime, right? Let’s build the project first :

Display custom messages or images when there is no records in GridView Data Source

Display custom messages or images when there is no records in GridView Data Source

This is a very frequent requirements to display Custom Messages or Images when there is no records in Grid View. I found people used custom code to achieve this. But ASP.NET Gridview having some inbuilt features to do the same.   You can use EmptyDataTemplate using GridView to display any custom message or Images or even web controls to add new records or whatever you want as per your requirements.

Working with Enums and Templates In ASP.NET MVC

Imagine you have the following types defined.

public class Movie
{
    public int Id { get; set; }
    public string Title { get; set; }
    public MovieGenre Genre { get; set; }
}

public enum MovieGenre
{
    Action,
    Drama,
    Adventure,
    Fantasy,
    Boring
}

If you want to display MovieGenre, the DisplayFor helpers generally give you what you expect (i.e. @Html.DisplayFor(m=> m.Genre) displays "Adventure"), but EditorFor will only give you a text input because the framework treats an enum the same as a string.