user1751825 user1751825 - 1 month ago 8
Vb.net Question

MVC 5 - Don't serialize property if default value

I have a viewmodel, which I use to create a business search filter object. In my view, I create an actionlink like so...

@Html.ActionLink("Search Link",
actionName:="Index",
controllerName:="Jobs",
routeValues:=New MyFilterViewModel() With {.Field1 = "Some Value", .Field2 = "Some other value"}, htmlAttributes:=Nothing)


This works fine. It serializes the viewmodel properties as querystring parameters, which are then bound by the controller action.

The filter view model has a lot of other properties though, most of which aren't relevant, but they're all still serialized in the URL parameters, even though most aren't set.

Is there a way to decorate the modelview properties, so they will only be serialized if they're assigned (not default value)?

Answer

You could use the DefaultHandling enum in [JsonProperty] attribute. Decorate your properties likeso.
Example:

[JsonProperty("MyProp", DefaultValueHandling = DefaultValueHandling.Ignore)]  
public string MyProp { get; set; }
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