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I have a pre-action web api hook that will check ModelState.IsValid. If the ModelState is not valid I do not want to execute the action and just return my message immediately. How exactly do I do this?
public class ValidateModelStateAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext) {
if (!actionContext.ModelState.IsValid)
{
var msg = actionContext.Request.CreateErrorResponse(HttpStatusCode.BadRequest, actionContext.ModelState);
// Now What?
}
base.OnActionExecuting(actionContext);
}
}
533
You can cancel filter execution in the OnActionExecuting and OnResultExecuting methods by setting the Result property to a non-null value.
ASP.NET MVC 5 has arrived with a very important feature called Filter Overrides. Using the Filter Overrides feature, we can exclude a specific action method or controller from the global filter or controller level filter. ASP.NET MVC 5 has arrived with a very important feature called Filter Overrides.
Web API includes filters to add extra logic before or after action method executes. Filters can be used to provide cross-cutting features such as logging, exception handling, performance measurement, authentication and authorization.
set the Response.Result. If the result is not null it will not execute the action. the exact syntax is escaping me right now, but it's as simple as
if(actionContext.ModelState.IsValid == false)
{
var response = actionContext.Request.CreateErrorResponse(...);
actionContext.Response = response;
}
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