Question

What is the best way to get HTML programmatically in the view from the controller.
I sometimes use string builder for that to render some html and send it the view from the controller.is it efficient?

What do you people suggests?

Answer 1

HtmlHelpers are meant for that. A better option is to create an HtmlHelper that will generate the tag you you need and all you do is pass an object to it (from the Model or ViewData in the view) and it outputs the proper tag for you. There is a TagBuilder object that will streamline everything you need.

public static string MyHtmlHelper(this HtmlHelper html, string url)
{
       TagBuilder tag = new TagBuilder("a");
       tag.Attributes.Add("href", url);
       return tag.ToString();
}

Then in your view:

<%= Html.MyHtmlHelper(ViewData["MyUrl"].ToString()) %>

This is just a quick example, you can extrapolate it to your liking.

Search asp.net mvc html helpers to understand how this works and how extension methods work.