Rajeeshcv.com

We come across situations like rendering elements based on the conditions in Model. For example, in the view if we want to show a TextBox if some property is true. A normal way of doing this is like below

<% if (this.Model.Exists)
      {%>
      <%= Html.TextBox("Test") %>
   <% } 

This looks like old classic asp style, and when it comes to code maintenance this will be a pain. So a clean way is to use an Html helper to generate this

  <%= Html.If(this.Model.Exists, action => action.TextBox("Name")) %>

which looks cleaner than the old one. Source code for this helper method is

public static string If(this HtmlHelper htmlHelper, bool condition, Func<HtmlHelper, string> action)
{
    if (condition)
    {
        return action.Invoke(htmlHelper);
    }

    return string.Empty;
}

What about IfElse condition, we could write another helper method for that