Sitecore MVC RenderingContext

using Sitecore.Mvc.Presentation

if (RenderingContext.CurrentOrNull == null)

                return string.Empty;

Item dataSource = RenderingContext.Current.Rendering.Item;

   
OR

Item dataSource = null;

            string datasourceId = RenderingContext.Current.Rendering.DataSource;

            if (Sitecore.Data.ID.IsID(datasourceId))

            {

               

                dataSource = SitecoreContext.GetItem<Item>(new Guid(datasourceId));

            }   

// get rendering parameters

RenderingContext.CurrentOrNull.Rendering.Parameters["Number of Fares to Display"] 

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Better for "safe" checking:

if (!string.IsNullOrEmpty(dataSource[DealListFields.DefaultBookNowOptions]))

instead of checking for null on the field and instead of doing dataSource.Fields[....]