I’ve got a jsf 1.2 form with two buttons and several input fields. The first button discards the entered values and repopulates the page with values from a db, the second button saves the entered values. The problem occurs when the user presses enter while the cursor is in one of the input fields, the … Read more
Say I have an Article model, and in the article ‘new’ view I have two buttons, “Publish” and “Save Draft”. My question is how can I know which button is clicked in the controller. I already have a solution but I think there must be a better way. What I currently used in the view … Read more
in ASP.NET MVC when my action will not return anything I use return new EmptyResult() or return null is there any difference? Answer You can return null. MVC will detect that and return an EmptyResult. MSDN: EmptyResult represents a result that doesn’t do anything, like a controller action returning null Source code of MVC. public … Read more
Is there a way to execute a JSF managed bean action when a page is loaded? If that’s relevant, I’m currently using JSF 1.2. Answer JSF 1.0 / 1.1 Just put the desired logic in the constructor of the request scoped bean associated with the JSF page. public Bean() { // Do your stuff here. … Read more
I am using the hub- feature of SignalR (https://github.com/SignalR/SignalR) to publish messages to all subscribed clients: public class NewsFeedHub : Hub public void Send(string channel, string content) { Clients[channel].addMessage(content); } This works fine when calling “Send” via Javascript, but I would also like the web application to publish messages (from within an ASP.NET MVC action … Read more
All the examples I can find about Func<> and Action<> are simple as in the one below where you see how they technically work but I would like to see them used in examples where they solve problems that previously could not be solved or could be solved only in a more complex way, i.e. … Read more
In Ansible (1.9.4) or 2.0.0 I ran the following action: – debug: msg=”line1 \n {{ var2 }} \n line3 with var3 = {{ var3 }}” $ cat roles/setup_jenkins_slave/tasks/main.yml – debug: msg=”Installing swarm slave = {{ slave_name }} at {{ slaves_dir }}/{{ slave_name }}” tags: – koba – debug: msg=”1 == Slave properties = fsroot[ {{ … Read more
Today I was thinking about declaring this: private delegate double ChangeListAction(string param1, int number); but why not use this: private Func<string, int, double> ChangeListAction; or if ChangeListAction would have no return value I could use: private Action<string,int> ChangeListAction; so where is the advantage in declaring a delegate with the delegate keyword? Is it because of … Read more
How would you model a system that handles permissions for carrying out certain actions inside an application? Answer Security models are a large (and open) field of research. There’s a huge array of models available to choose from, ranging from the simple: Lampson’s Access control matrix lists every domain object and every principal in the … Read more
private void Include(IList<string> includes, Action action) { if (includes != null) { foreach (var include in includes) action(<add include here>); } } I want to call it like that this.Include(includes, _context.Cars.Include(<NEED TO PASS each include to here>)); The idea is pass each include to the method. Answer If you know what parameter you want to … Read more
