Adding string to a model attribute

Question

Straightaway. In my model I have a field DistanceTravelled , it is of type double. Now whenever i want to display it using @Html.DisplayFor helper method, then I want the distance travelled value to be appended by "Km". For Example:

123 Km instead of 123

I can do that by placing Km at the end of @Html.DisplayFor helper. But I was hoping that there must be some data annotation attribute or some other simpler way.

Thanks for trying to help. :)

Answer 1

You could use

[DisplayFormat(DataFormatString="{0} km")]
public double DistanceTravelled {get;set;}

More info about the DisplayFormatAttribute: DisplayFormatAttribute Class

Answer 2

You can modify your ViewModel to something like this:

...
string DistanceTravelled {{ get { return String.Format("{0} km",this.DistanceTravelled; };set; }
...

But I think this won't work with your Doulble. Implicit convention between Double and string :(

Ok got it :)

In view model:

using System.ComponentModel.DataAnnotations;
+
[DisplayFormat(DataFormatString="{0}km")]
double DistanceTravelled {get;set;}

and this code below for Id=2:

@Html.DisplayFor(m=>m.Id)

renders as

2Km