action

问题 A lot of time when creating simple events in my program that other classes can subscribe to instead of making a delegate and creating an event from the delegate I just create the event with either Action or Func to avoid having to create the delegate. Is there any downsides to doing this? 回答1: Not really, the only downside I can think of is that if you have a logical intention (beyond the parameters and return values expected) that you want the user to satisfy that may get lost using the

问题 Documentation states that if an Intent can be processed by multiple applications the user will be prompted with a dialog asking him to choose the application to complete the action. Is there any way to make user select multiple applications that will complete the action one by one? For example, if I want to share a message I'll be using ACTION_SEND with a specified MIME type and I'll be prompted with a list of applications that can share the message. Can I make a user choose multiple apps to

问题 I want to perform an action from a custom command. The forward method Controller.php class provides this function, but I do not know access it from the execute () method of the command file 回答1: Making the controller a service will result in performance overhead because of the request stack, as it then should return a HttpResponse . The Request scope will not be very usefull in the command. I'd advise you to refactor the action from the Controller to a separate service class definition, and

问题 I am quite new to RoR and I am looking for a way of getting a route for a given controller, action & param. Something similar to url_for() but without the domain and protocol. Lets say I have : params = {"controller"=>"controller", "action"=>"edit", "project_id"=>"1"} I need to get : route = "/controller/edit/1" It would be best if I do not have to manually build the route and if I don't need to split the result of url_for(). Does RoR natively support such a feature? It's probably an easy

问题 I have an Action and I wonder how could I access the instance that call the method. Exemple: this.FindInstance(() => this.InstanceOfAClass.Method()); this.FindInstance(() => this.InstanceOfAClass2.Method()); this.FindInstance(() => this.InstanceOfAClass3.Method()); public void FindInstance(Action action) { // The action is this.InstanceOfAClass.Method(); and I want to get the "Instance" // from "action" } Thank you 回答1: I think you're looking for the Delegate.Target property. EDIT: Okay, now

问题 On a Jsp page I have some select elements which were disabled after a value was selected (Disabled them in javascript). Now when the form is submitted, I can not access those selected values in the action class. I know for sure that this is caused by the select elements being disabled because, when I tried the same without making them disabled, it worked fine. Now I don't understand why is this so. I thought maybe I should enable them before the form is submitted, but it does not seem a good

问题 I have an MVC Controller with an action public ActionResult GeneratePDF(string id) { FileContentResult filePath = this.File(pdfBuffer, MediaTypeNames.Application.Pdf); return filePath; } And for some reason it is taking over 20 seconds when it hits the return line. The pdfBuffer is working okay, and when I run it on my VS all is okay, but when I deploy to IIS 6 it runs slow. Anyone know why? 回答1: I was running into a similar issue when trying to export to XLS and PDF, the only thing that seem

问题 I'm trying to remove the action in the cakephp url and add a slug inflector, to be more clear this is my expected output: from this: example.com/posts/view/81/This is a test post to this: example.com/posts/This-is-a-test-post This is my current code: That gives me this output: example.com/posts/view/This is a test post Controller: public function view($title = null) { if (!$title) { throw new NotFoundException(__('Invalid post')); } $post = $this->Post->findByTitle($title); if (!$post) {

问题 I wrote an Ember component that represents a styled input field that can handle file uploads. In order to achieve this I used a <div> and an <input> . The <input> has visibility: hidden and once the click event on the <div> is fired I fire the click event on the invisible <input> in the action handling of the Ember component. My problem is that after choosing files the action never reaches my Ember component. add-document-input.hbs <div {{action "add"}} class="floating-button"> <span>+</span>

问题 I wrote an Ember component that represents a styled input field that can handle file uploads. In order to achieve this I used a <div> and an <input> . The <input> has visibility: hidden and once the click event on the <div> is fired I fire the click event on the invisible <input> in the action handling of the Ember component. My problem is that after choosing files the action never reaches my Ember component. add-document-input.hbs <div {{action "add"}} class="floating-button"> <span>+</span>