How to pass error message to error view in MVC 5?

Question

I am working on exception handling and have written below code for the same.

Web.Config

Answer 1

public class CustomExceptionFilter : HandleErrorAttribute {
    public override void OnException(ExceptionContext filterContext) {

        var controller = filterContext.Controller as Controller;
        controller.Response.StatusCode = (int)System.Net.HttpStatusCode.InternalServerError;
        controller.Response.TrySkipIisCustomErrors = true;
        filterContext.ExceptionHandled = true;

        var controllerName = (string)filterContext.RouteData.Values["controller"];
        var actionName = (string)filterContext.RouteData.Values["action"];
        var exception = filterContext.Exception;
        //need a model to pass exception data to error view
        var model = new HandleErrorInfo(exception, controllerName, actionName);

        var view = new ViewResult();
        view.ViewName = "Error";
        view.ViewData = new ViewDataDictionary();
        view.ViewData.Model = model;

        //copy any view data from original control over to error view
        //so they can be accessible.
        var viewData = controller.ViewData;
        if (viewData != null && viewData.Count > 0) {
            viewData.ToList().ForEach(view.ViewData.Add);
        }

        //Instead of this
        ////filterContext.Result = view;
        //Allow the error view to display on the same URL the error occurred
        view.ExecuteResult(filterContext);

        //should do any logging after view has already been rendered for improved performance.
        //_logger.Error("Uncaught exception", exception);

    }
}

Views/Shared/Error.cshtml

@model System.Web.Mvc.HandleErrorInfo
@{
    ViewBag.Title = "Error";
}

    

        
Error
        

            
An error occurred while processing your request.
        
        

            @{
                if (Model != null && Model.Exception != null) {
                    
Here is some information you can pass on to the administrator
                    
Path: ~/@string.Format("{0}/{1}", Model.ControllerName, Model.ActionName)
                    
Error: @Model.Exception.GetType().Name
                    if (Request.IsLocal) {
                        
Message: @Model.Exception.Message
                        
@Model.Exception.StackTrace
                    }
                }
            }
        
    

Web.Config