Search Results

Search found 9432 results on 378 pages for 'yii mvc'.

Page 174/378 | < Previous Page | 170 171 172 173 174 175 176 177 178 179 180 181  | Next Page >

• How to build a good service layer in ASP.NET?

  - by Swippen

  I have looked through some questions, technologies for building a good service layer but I have some questions regarding this that I need help with. First some information of what I have for requirements. We currently have a number of web applications that talk to each other in a spiderweb looking way (all talking to each other in a confusing way via webservices and database data). We want to change this so that all applications go through a service layer where we can work more with cache and encapsulate common functionality and more. We want this layer to also have a Web API so that 3rd party clients can consume information from the service. The problem I see is that if we build the service layer with say MVC4 Web API don't we need to communicate between the application using the webAPI meaning we have to construct URLs and consume JSON/Xml. That does not sound too effective. I assume a better method would be working with entities and WCF to communicate between the application but then we might loose the Web API magic? So the question is if there is a way to consume a service layer as both a Web API (JSON/XML) and as a more backend service layer with entities. If we are forced to use 2 different service layers we might have to duplicate some functionality and other bad things. Hope the question is clear enough and please ask if you need any more information.

  Read the article

• Is there a factory pattern to prevent multiple instances for same object (instance that is Equal) good design?

  - by dsollen

  I have a number of objects storing state. There are essentially two types of fields. The ones that uniquely define what the object is (what node, what edge etc), and the others that store state describing how these things are connected (this node is connected to these edges, this edge is part of these paths) etc. My model is updating the state variables using package methods, so all these objects act as immutable to anyone not in Model scope. All Objects extend one base type. I've toyed with the idea of a Factory approach which accepts a Builder object and constructs the applicable object. However, if an instance of the object already exists (ie would return true if I created the object defined by the builder and passed it to the equal method for the existing instance) the factory returns the current object instead of creating a new instance. Because the Equal method would only compare what uniquely defines the type of object (this is node A to node B) but won't check the dynamic state stuff (node A is currently connected to nodes C and E) this would be a way of ensuring anyone that wants my Node A automatically knows its state connections. More importantly it would prevent aliasing nightmares of someone trying to pass an instance of node A with different state then the node A in my model has. I've never heard of this pattern before, and it's a bit odd. I would have to do some overriding of serialization methods to make it work (ensure that when I read in a serilized object I add it to my facotry list of known instances, and/or return an existing factory in its place), as well as using a weakHashMap as if it was a weakHashSet to know whether an instance exists without worrying about a quasi-memory leak occuring. I don't know if this is too confusing or prone to its own obscure bugs. One thing I know is that plugins interface with lowest level hardware. The plugins have to be able to return state that is different than my memory; to tell my memory when its own state is inconsistent. I believe this is possible despite their fetching objects that exist in my memory; we allow building of objects without checking their consistency with the model until the addToModel is called anyways; and the existing plugins design was written before all this extra state existed and worked fine without ever being aware of it. Should I just be using some other design to avoid this crazyness? (I have another question to that affect that I'm posting).

  Read the article

• is a factory pattern to prevent multuple instances for same object (instance that is Equal) good design?

  - by dsollen

  I have a number of objects storing state. There are essentially two types of fields. The ones that uniquly define what the object is (what node, what edge etc), and the oens that store state describing how these things are connected (this node is connected to these edges, this edge is part of these paths) etc. My model is updating the state variables using package methdos, so these objects all act as immutable to anyone not in Model scope. All Objects extend one base type. I've toyed with the idea of a Factory approch which accepts a Builder object and construct the applicable object. However, if an instance of the object already exists (ie would return true if I created the object defined by the builder and passed it to the equal method for the existing instance) the factory returns the current object instead of creating a new instance. Because the Equal method would only compare what uniquly defines the type of object (this is node A nto node B) but won't check the dynamic state stuff (node A is currently connected to nodes C and E) this would be a way of ensuring anyone that wants my Node A automatically knows it's state connections. More importantly it would prevent aliasing nightmares of someone trying to pass an instance of node A with different state then the node A in my model has. I've never heard of this pattern before, and it's a bit odd. I would have to do some overiding of serlization methods to make it work (ensure when I read in a serilized object I add it to my facotry list of known instances, and/or return an existing factory in it's place), as well as using a weakHashMap as if it was a weakHashSet to know rather an instance exists without worrying about a quasi-memory leak occuring. I don't know if this is too confusing or prone to it's own obscure bugs. One thing I know is that plugins interface with lowest level hardware. The plugins have to be able to return state taht is different then my memory; to tell my memory when it's own state is inconsistent. I believe this is possible despit their fetching objects that exist in my memory; we allow building of objects without checking their consistency with the model until the addToModel is called anyways; and the existing plugins design was written before all this extra state existed and worked fine without ever being aware of it. Should I just be using some other design to avoid this crazyness? (I have another question to that affect I'm posting).

  Read the article

• Is sending data to a server via a script tag an outdated paradigm?

  - by KingOfHypocrites

  I inherited some old javascript code for a website tracker that submits data to the server using a script url: var src = "http://domain.zzz/log/method?value1=x&value2=x" var e = document.createElement('script'); e.src = src; I guess the idea was that cross domain requests didn't haven't to be enabled perhaps. Also it was written back in 2005. I'm not sure how well XmlHttpRequests were supported at the time. Anyone could stick this on their website and send data to our server for logging and it ideally would work in most any browser with javascript. The main limitation is all the server can do is send back javascript code and each request has to wait for a response from the server (in the form of a generic acknowledgement javascript method call) to know it was received, then it sends the next. I can't find anyone doing this online or any metrics as to whether this faster or more secure than XmlHttpRequests. I don't know if this is just an old way of doing things or it's still the best way to send data to the server when you are mostly trying to send data one way and you need the best performance possible. So in summary is sending data via a script tag an outdated paradigm? Should I abandon in favor of using XmlHttpRequsts?

  Read the article

• Is passing the Model around in this way considered bad practice?

  - by Theomax

  If I have a view called, for example, ViewDetails that displays user information in labels and has a Model called ViewDetailsModel and if I want to allow the user to click a button to edit some of these details, is it considered bad practice is I pass the entire Model in the markup to a controller method which then assigns the values for another model, using the values stored in the Model that was passed in as a parameter to that action method? If so, should there instead be a service method that gets the data required for the edit view? For example: In the ViewDetails view, the user clicks the edit button which calls an action method in the controller (and passes in the Model object). The action method then uses the data in the Model object to populate another model which will be used for the EditDetails view that will be returned.

  Read the article

• Storing images in file system and returning URLs or virtually resizing and returning byte arrays?

  - by ismaelf

  I need to create a REST web service to manage user submitted images and displaying them all in a website. There are multiple websites that are going to use this service to manage and display images. The requirements are to have 5 pre-defined image sizes available. The 2 options I see are the following: The web service will create the 5 images, store them in the file system and and store the URL's in the database when the user submits the image. When the image is requested, the web service will return an array of URLs. I see this option to be a little hard on the hard drive. The estimates are 10,000 users per site, and lets say, 100 sites. The heavy processing will be done when the user submits the image and each image is going to be pulled from the File System. The web service will store just the image that the user submits in the file system and it's URL in the database. When the user request images, the web service will get the info from the DB, load the image on memory, create its 5 instances and return an object with 5 image arrays (I will probably cache the arrays). This option is harder on the processor and memory. The heavy processing will be done when the images get requested. A plus I see for option 2 is that it will give me the option to rewrite the URL of the image and make them site dependent (prettier) than having a image repository for all websites. But this is not a big deal. What do you think of these options? Do you have any other suggestions?

  Read the article

• How should I implement the repository pattern for complex object models?

  - by Eric Falsken

  Our data model has almost 200 classes that can be separated out into about a dozen functional areas. It would have been nice to use domains, but the separation isn't that clean and we can't change it. We're redesigning our DAL to use Entity Framework and most of the recommendations that I've seen suggest using a Repository pattern. However, none of the samples really deal with complex object models. Some implementations that I've found suggest the use of a repository-per-entity. This seems ridiculous and un-maintainable for large, complex models. Is it really necessary to create a UnitOfWork for each operation, and a Repository for each entity? I could end up with thousands of classes. I know this is unreasonable, but I've found very little guidance implementing Repository, Unit Of Work, and Entity Framework over complex models and realistic business applications.

  Read the article

• What would be the market life of a JVM based software framework?

  - by Nav

  I saw how Struts 1 lasted from 2000 to 2013. I hear that people are moving from Struts 2 to Spring. But for a project that may need to be maintained for a decade or two, would it be advisable to opt for a framework or directly code with servlets and jquery? Can a system architecture really be designed keeping in mind a particular framework? What really is the market life of a framework? Do the creators of the framework create it with the assumption that it would become obsolete in a decade?

  Read the article

• Generic Handler vs Direct Reference

  - by JNF

  In a project where I'm working on the data access layer I'm trying to make a decision how to send data and objects to the next layer (and programmer). Is it better to tell him to reference my dll, OR should I build a generic handler and let him take the objects from there (i.e. json format) If I understand correctly, In case of 2. he would have to handle the objects on his own, whereas in case 1. he will have the entities I've built. Note: It is very probable that other people would need to take the same data, though, we're not up to that yet. Same question here - should I make it into a webservice, or have them access the handler?

  Read the article

• Are session aware Models a bad thing?

  - by kevtufc

  I'm thinking specifically in Rails here, but I suspect this is a wider question. In a Rails web application I'm using data from the session in models in order that the models know who is logged in. I use this in a method which filters out some data from the database depending on a very simple permissions system. The thing is: using sessions in models in Rails requires a bit of a workaround. It works, but I've a feeling that it's something that I shouldn't be doing and I'm worried there's a big gotcha I'm missing. I suppose the Right Thing To Do would be to return all the data and filter out the not-wanted bits in the controller before passing that to the view, but doing it in the model seems to avoid quite a bit of code duplication and so feels "cleaner." Can anyone tell me why or shouldn't do this? Or that it's not a problem?

  Read the article

• Downloading stream using FileStreamResult

  - by user1400915

  I have a Action in controller as public ActionResult Download() { return File(downloadStream, "application/octet-stream", fileName); } If I want to use FilePathresult as: public FilePathResult Download() { return File(downloadStream, "application/octet-stream", fileName); } can I call the Download() on click of a button like this @Html.ActionLink("FileDownload", "Download", new { file = item.FileName, GuID = item.DocumentGuID }) /text).Width(10);

  Read the article

• Windows 8 Native App in Asp.net MVC?

  - by xiao

  I was not sure if this should be here or stackoverflow. I am looking at developing some windows 8 apps. I come from a web background and was really intrigued that you make them with html and javascript. I started to think though why can't you use asp.net mvc to build a windows 8 application. My question is can you somehow use asp.net mvc to build a native windows 8 application or are you suck with javascript and html?

  Read the article

• Troubleshooting intermittantly long 'page loading' problem

  - by justSteve

  Working off IIS 7 with an asp.net mvc app. Most page accesses are lightening quick. Sometimes the browser reports 'page loading' for an exceptionally long time. We are still in the development/testing mode so it's not a network/bandwidth issue. Happens in both IE and FF. No explicit error conditions in the server logs. If i could reproduce it i could run firebug/fiddler to give more info. As it is, it's a little too infrequent to simply leave both those running hoping for the condition to fire - unless/until that's the only option to get better info. I have a hunch this is client-side jquery/ajax related but only a hunch - don't have enough background in either jQuery or MVC to really know what can go wrong. Any initial troubleshooting suggestions welcome. thx

  Read the article

• Does my OS will support these tools ?

  - by Zerotoinfinite

  I am currently using Windows Server 2003 and I want to install Windows XP [SP1 or SP2 or SP3] or may be VISTA. I have may application which I can run on Windows Server 2003 and I am curious to know If I could run the same on XP or Vista. Please help me deciding whether I change my OS or not, here is the List of software and app I want to work on: Visual Studio 2008/2010 SQL Server 2008 ASP.NET MVC and Entity Framework WPF application P.S. : I can create all my application [except WPF] with Windows Server 2003. I have a idea that I can install VS 2008 on XP but not exactly sure about MVC framework and other latest technology stuff.

  Read the article

• Custom Model Binding of IEnumerable Properties in ASP.Net MVC 2

  - by Doug Lampe

  MVC 2 provides a GREAT feature for dealing with enumerable types.  Let's say you have an object with a parent/child relationship and you want to allow users to modify multiple children at the same time.  You can simply use the following syntax for any indexed enumerables (arrays, generic lists, etc.) and then your values will bind to your enumerable model properties. 1: <% using (Html.BeginForm("TestModelParameter", "Home")) 2: { %> 3: < table > 4: < tr >< th >ID</th><th>Name</th><th>Description</th></tr> 5: <% for (int i = 0; i < Model.Items.Count; i++) 6: { %> 7: < tr > 8: < td > 9: <%= i %> 10: </ td > 11: < td > 12: <%= Html.TextBoxFor(m => m.Items[i].Name) %> 13: </ td > 14: < td > 15: <%= Model.Items[i].Description %> 16: </ td > 17: </ tr > 18: <% } %> 19: </ table > 20: < input type ="submit" /> 21: <% } %> Then just update your model either by passing it into your action method as a parameter or explicitly with UpdateModel/TryUpdateModel. 1: public ActionResult TestTryUpdate() 2: { 3: ContainerModel model = new ContainerModel(); 4: TryUpdateModel(model); 5:   6: return View("Test", model); 7: } 8:   9: public ActionResult TestModelParameter(ContainerModel model) 10: { 11: return View("Test", model); 12: } Simple right?  Well, not quite.  The problem is the DefaultModelBinder and how it sets properties.  In this case our model has a property that is a generic list (Items).  The first bad thing the model binder does is create a new instance of the list.  This can be fixed by making the property truly read-only by removing the set accessor.  However this won't help because this behaviour continues.  As the model binder iterates through the items to "set" their values, it creates new instances of them as well.  This means you lose any information not passed via the UI to your controller so in the examplel above the "Description" property would be blank for each item after the form posts. One solution for this is custom model binding.  I have put together a solution which allows you to retain the structure of your model.  Model binding is a somewhat advanced concept so you may need to do some additional research to really understand what is going on here, but the code is fairly simple.  First we will create a binder for the parent object which will retain the state of the parent as well as some information on which children have already been bound. 1: public class ContainerModelBinder : DefaultModelBinder 2: { 3: /// <summary> 4: /// Gets an instance of the model to be used to bind child objects. 5: /// </summary> 6: public ContainerModel Model { get; private set; } 7:   8: /// <summary> 9: /// Gets a list which will be used to track which items have been bound. 10: /// </summary> 11: public List<ItemModel> BoundItems { get; private set; } 12:   13: public ContainerModelBinder() 14: { 15: BoundItems = new List<ItemModel>(); 16: } 17:   18: protected override object CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) 19: { 20: // Set the Model property so child binders can find children. 21: Model = base.CreateModel(controllerContext, bindingContext, modelType) as ContainerModel; 22:   23: return Model; 24: } 25: } Next we will create the child binder and have it point to the parent binder to get instances of the child objects.  Note that this only works if there is only one property of type ItemModel in the parent class since the property to find the item in the parent is hard coded. 1: public class ItemModelBinder : DefaultModelBinder 2: { 3: /// <summary> 4: /// Gets the parent binder so we can find objects in the parent's collection 5: /// </summary> 6: public ContainerModelBinder ParentBinder { get; private set; } 7: 8: public ItemModelBinder(ContainerModelBinder containerModelBinder) 9: { 10: ParentBinder = containerModelBinder; 11: } 12:   13: protected override object CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) 14: { 15: // Find the item in the parent collection and add it to the bound items list. 16: ItemModel item = ParentBinder.Model.Items.FirstOrDefault(i => !ParentBinder.BoundItems.Contains(i)); 17: ParentBinder.BoundItems.Add(item); 18: 19: return item; 20: } 21: } Finally, we will register these binders in Global.asax.cs so they will be used to bind the classes. 1: protected void Application_Start() 2: { 3: AreaRegistration.RegisterAllAreas(); 4:   5: ContainerModelBinder containerModelBinder = new ContainerModelBinder(); 6: ModelBinders.Binders.Add(typeof(ContainerModel), containerModelBinder); 7: ModelBinders.Binders.Add(typeof(ItemModel), new ItemModelBinder(containerModelBinder)); 8:   9: RegisterRoutes(RouteTable.Routes); 10: } I'm sure some of my fellow geeks will comment that this could be done more efficiently by simply rewriting some of the methods of the default model binder to get the same desired behavior.  I like my method shown here because it extends the binder class instead of modifying it so it minimizes the potential for unforseen problems. In a future post (if I ever get around to it) I will explore creating a generic version of these binders.

  Read the article

• Accessing a module's action rendered output

  - by Flavius

  Hi. I'm writing an "Account" module which should take care of everything about accounts: registration, login/logout, user administration, password recovery, account activation, etc. So I thought it would be best to reuse whatever the module's DefaultController::actionRegister() generates to show on the main page. So my question is: how to create a new "sub request" (similar to CController::forward()) from any controller (either SiteController, read: from views/layouts/main.php, or another controller, eventually of another submodule) to a given module/controller/action? I've tried with $this-forward() from within my application layout without success: it shows a blank page, no error whatsoever. Thanks

  Read the article

• MVC Implementation PHP Zend PDF generation

  - by zod

  Am using Zend framework and PHP Am going to generate a PDF using Zend . So the View is PDF.There is no PHTML. But if i dont use PHTML in view , is it a perfect MVC? if i want to be a perfect MVC shall i do the db retrieval and variable declaration and assigning in controller and use view and use all pdf functions in view phtml file will it make a perfect MVC? What is the advantage of MVC in this case? :-) can i do the include of zend pdf in phtml file or controller php file? what is the difference ?

  Read the article

• Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

  - by Fotis

  I am a newbie programmer, so I will need your help! Locally the webapp works ok with the db on it! When I uploaded the application on the cloudcontrol, it comes up with the following error: CDbConnection failed to open the DB connection: SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)! I suppose I have not uploaded the db. This is the very first time I upload a webapp on a server so I do not know the exact steps that I have to follow in order to upload the db on a server. Cloudcontrol has documentation about mysql! I did follow the steps but the webapp comes with the same error! Could you please tell me what steps I have to follow in order to make it working? I am sure that this error is due to lack of knowledge!

  Read the article

• How to customize BsGridView to show links instead of BsButtonColumn?

  - by felipe.zkn

  Given the code below, I need to customize the third column to show two links instead of that BsButtonColumn. I didn't find any related documentation to get the answer. <?php $this->widget( 'bootstrap.widgets.BsGridView', array( 'id' => 'activity-translation-grid', 'dataProvider' => $model->search(), 'filter' => $model, 'columns' => array( 'id', 'name', array( 'class' => 'BsButtonColumn', ), ), ) ); ?>

  Read the article

• Modify links in CListView pager to follow routing

  - by Thorpe Obazee

  I currently have this: <?php $this->widget('zii.widgets.CListView', array( 'dataProvider'=>$model, 'itemView'=>'_view', 'template' => '{items}{pager}' )); ?> The Pager shows me paginations to posts/index?page=2, posts/index?page=3. The problem is that I have routed blog/posts to posts. I am on blog/posts now and all the links in the Pager is showing me posts/index?page=2, page/index?page=3. I want to have the pager showing links to blog/posts/index?page=2, blog/posts/index?page=3 This my current routing for this: 'urlFormat'=>'path', 'rules'=>array( 'blog/posts' => 'posts', How should I do this? Update: For those confused as to what I am saying:

  Read the article

• CGridView Filter doesn't work when you add more than one button to the CButtonColumn

  - by era

  I have a CGridView as follows, <?php $this->widget('zii.widgets.grid.CGridView', array( 'id'=>'order-grid', 'dataProvider'=>$model->search(), 'filter'=>$model, 'columns'=>array( 'order_id', //'ordered_datetime', 'customer_id', 'status', //'delivery_address', array( 'class'=>'CButtonColumn', 'template' => '{view} {rollback} {receive}{pack} {dispatch}{delivered}', 'htmlOptions'=>array('width'=>'250px'), 'buttons'=>array( 'receive'=>array( 'id'=>'receive', 'name'=>'receive', 'url'=>'$this->grid->controller->createUrl("/shop/order/admin&received=true", array("id"=>$data->order_id,"asDialog"=>1,"gridId"=>$this->grid->id))', 'type'=>'submit', 'imageUrl'=>'/mdg/images/Receive1.png', 'visible'=>'($data->status=="pending")?true:false;' ), 'rollback'=>array( 'id'=>'rollback', 'name'=>'rollback', 'url'=>'$this->grid->controller->createUrl("/shop/order/admin&rollback=true", array("id"=>$data->order_id,"asDialog"=>1,"gridId"=>$this->grid->id))', 'imageUrl'=>'/mdg/images/rollback.jpg', 'visible'=>'($data->status=="pending")?false:true;' ), ), ), ), )); ? And When I add one more button to the buttons array, the filter doesnt work. Any Idea why that is? It's Great if anyone can help.. Thanks!

  Read the article

• how to do multi insert and obtain ids

  - by liysd

  hi, I want to insert some data into a table (id PK autoincrement, val) with use multi insert INSERT INTO tab (val) VALUES (1), (2), (3) Is it possible to obtain a table of last inserted ids? I'm asking becouse I'm not sure if all will in this form: (n, n+1, n+2). I use mysql inodb.

  Read the article

• asp.net mvc datatable

  - by mazhar

  How can I pass datatable to the mvc view

  Read the article

• Why each request with activerecord is doing SHOW TABLE?

  - by dynback.com

  My test page is processed if believe to trace in 46 ms, while 11 of them I am doing this 20:53:06.111597 system.db.CDbConnection Opening DB connection 20:53:06.118046 system.db.CDbCommand Querying SQL: SHOW COLUMNS FROM `questions` 20:53:06.122476 system.db.CDbCommand Querying SQL: SHOW CREATE TABLE `questions` Is this obligatory?

  Read the article

• Java Spring MVC partial views

  - by Tim

  I'm learning Spring MVC at the moment and comparing it to ASP .NET MVC. Is there a way to use partial views in java (like .ascx partials in ASP .NET MVC), so i can associate it with action method of some controller and pass model data to it.

  Read the article

< Previous Page | 170 171 172 173 174 175 176 177 178 179 180 181  | Next Page >