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  • problem in basic implementation of MVVM pattern - Services

    - by netmajor
    I watch some video and read articles about MVVM pattern and start thinking how should I implement it in my Silverlight app. So at first I create Silverlight application. I think that for clear view I create 3 folders: View - for each user control page in my app, ViewModel - for c# class which will querying date and Model- Entity Data Model of my SQL Server or Oracle Database. And now I am confused, cause I want to implement *WCF/RIA Services/Web services* in my project. In which folder should I put in class of services? I see in examples that Services take date and filtering it and then output data was binding in View - so It looks as ViewModel. But I was sure that someone use Services in Model and that I want to do. But how? Can someone explain me implementing Services as Model? Is my point of view at MVVM is correctly?

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  • ASP.net MVC 2.0 using the same form for adding and editing.

    - by Chevex
    I would like to use the same view for editing a blog post and adding a blog post. However, I'm having an issue with the ID. When adding a blog post, I have no need for an ID value to be posted. When model binding binds the form values to the BlogPost object in the controller, it will auto-generate the ID in entity framework entity. When I am editing a blog post I DO need a hidden form field to store the ID in so that it accompanies the next form post. Here is the view I have right now. <% using (Html.BeginForm("CommitEditBlogPost", "Admin")) { %> <% if (Model != null) { %> <%: Html.HiddenFor(x => x.Id)%> <% } %> Title:<br /> <%: Html.TextBoxFor(x => x.Title, new { Style = "Width: 90%;" })%> <br /> <br /> Summary:<br /> <%: Html.TextAreaFor(x => x.Summary, new { Style = "Width: 90%; Height: 50px;" }) %> <br /> <br /> Body:<br /> <%: Html.TextAreaFor(x => x.Body, new { Style = "Height: 250px; Width: 90%;" })%> <br /> <br /> <input type="submit" value="Submit" /> <% } %> Right now checking if the model is coming in NULL is a great way to know if I'm editing a blog post or adding one, because when I'm adding one it will be null as it hasn't been created yet. The problem comes in when there is an error and the entity is invalid. When the controller renders the form after an invalid model the Model != null evaluates to false, even though we are editing a post and there is clearly a model. If I render the hidden input field for ID when adding a post, I get an error stating that the ID can't be null. Any help is appreciated. EDIT: I went with OJ's answer for this question, however I discovered something that made me feel silly and I wanted to share it just in case anyone was having a similar issue. The page the adds/edits blogs does not even need a hidden field for id, ever. The reason is because when I go to add a blog I do a GET to this relative URL BlogProject/Admin/AddBlogPost This URL does not contain an ID and the action method just renders the page. The page does a POST to the same URL when adding the blog post. The incoming BlogPost entity has a null Id and is generated by EF during save changes. The same thing happens when I edit blog posts. The URL is BlogProject/Admin/EditBlogPost/{Id} This URL contains the id of the blog post and since the page is posting back to the exact same URL the id goes with the POST to the action method that executes the edit. The only problem I encountered with this is that the action methods cannot have identical signatures. [HttpGet] public ViewResult EditBlogPost(int Id) { } [HttpPost] public ViewResult EditBlogPost(int Id) { } The compiler will yell at you if you try to use these two methods above. It is far too convenient that the Id will be posted back when doing a Html.BeginForm() with no arguments for action or controller. So rather than change the name of the POST method I just modified the arguments to include a FormCollection. Like this: [HttpPost] public ViewResult EditBlogPost(int Id, FormCollection formCollection) { // You can then use formCollection as the IValueProvider for UpdateModel() // and TryUpdateModel() if you wish. I mean, you might as well use the // argument since you're taking it. } The formCollection variable is filled via model binding with the same content that Request.Form would be by default. You don't have to use this collection for UpdateModel() or TryUpdateModel() but I did just so I didn't feel like that collection was pointless since it really was just to make the method signature different from its GET counterpart. Thanks for the help guys!

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  • Is it good to use .settings for storing controls text data?

    - by Zenya
    In my WinForms applications I often put the controls text data (form title, labels texts, button captions, etc.) into a .settings (feature automatically generated by Visual Studio - based on the ApplicationSettingsBase class). In particular, Add a form or a control. In Solution Explorer add a new string item into the application scope of the settings file. Bind the control text property with the corresponding item of the settings file (through the property binding). Good point of this is that all my text data is collected in one place and easy to check and edit. Also it is convenient when I want to use the same text for several controls. However, I haven't heard that somebody uses the .settings such way. In tutorials for creating multilingual applications, for example, it is recommended to enter texts directly into the control property. So, is it good practice to use .settings for storing controls text data? Brief conclusion from the answers: Storing controls text data in the .settings is not common practice.

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  • WCF client proxy initialization

    - by 123Developer
    I am consuming a WCF service and created its proxy using the VS 2008 service reference. I am looking for the best pattern to call WCF service method Should I create the client proxy instance every time I call the service method and close the client as soon as I am done with that? When I profiled my client application, I could see that it is taking lot of time to get the Channel while initializing the proxy client Should I use a Singleton pattern for the client proxy so that I can use the only once instance and get rid of the re-initializing overhead? Is there any hidden problem with this approach? I am using .Net framework 3.5 SP1, basicHttp binding with little customization.

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  • VBA Excel To SqlServer

    - by adrianm
    What is the best way to write VBA code to connect to SQL Server 2005 from Excel? The users of the excel file might run XP, Vista, Win7 and I want to prevent driver installation as much as possible. My understanding is that XP uses MDAC while Vista/Win7 uses DAC. Does that mean that a reference to MDAC 2.8 will not work on a Vista machine and the other way around? Will my VBA code work on both if I don't add a reference and use late binding, e.g. CreateObject("ADODB.Connection")?

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  • wcf generated classes and validation application block attributes

    - by Shaboboo
    Hi, I'm new to the validation application block and trying to use it with wcf... I have a wcf service that has data objects with validation rules defined with attributes, using the validation application block . On my client side (WPF), I have a service reference. When I update the service reference the generated classes do not have the validation rules attributes in them. How can I get the rules from the service? Am I missing some step, or is it not possible?

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  • Consuming an RPC/encoded Web Service in .NET

    - by Timmy O' Tool
    I'm trying to build the proxy class for a web service using the wsdl Executing this command: wsdl [http://WSDL_URL] I'm getting Warning: This web reference does not conform to WS-I Basic Profile v1.1. R2706: A wsdl:binding in a DESCRIPTION MUST use the value of "literal" for the use attribute in all soapbind:body, soapbind:fault, soapbind:header and soapbind:headerfault elements. ... Error: Cannot find definition for http://schemas.xmlsoap.org/wsdl/:BouBinding. Service Description with namespace http://schemas.xmlsoap.org/wsdl/ is missing. Parameter name: name The author of the web service told me that the SOAP protocol is RPC/encoded. Is there is any way to generate a proxy class for this?

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  • Clean way to perform commands in the Emacs minibuffer

    - by Christopher Monsanto
    Consider the following example: I want to read a file using ido from the minibuffer, but merge in all of the directories I use often. I can't just execute (ido-find-file) (ido-merge-work-directories) Because the second sexp will only execute after the user is finished selecting the file. The question then is: what is the best/cleanest way to execute commands in the minibuffer's command loop? The only way I know to do this is to bind my desired command to a key sequence, and add that sequence to unread-command-events so the key runs once we enter the minibuffer command loop: (setq unread-command-events (append (listify-key-sequence (kbd "M-s")) unread-command-events)) ; std key-binding for ido-merge-work-directories (ido-find-file) But that is very hacky, and I would like to know if there is a better solution. Thanks!

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  • WCF hosted in a Web application and compatibility mode

    - by DotnetDude
    I have a WCF service hosted in a web application (IIS). I need to expose 1 end point over wsHttp and the other over netTcp. I am on a IIS7 environment that makes it possible for me to host non HTTP based services. Anyways, when I browse the .svc file using a browser, I get the error: The service cannot be activated because it does not support ASP.NET compatibility. ASP.NET compatibility is enabled for this application By googling, I realized that WCF runs in two modes - Mixed and ASP.NET compatible. When I apply the attribute [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] However, it appears that once I apply this attribute to the Service Contract implementation, I cannot use a non HTTP binding. How do I set it up so that: I can support non HTTP endpoints I can host the service on a Web app I don't create multiple services one with aspnet compatibility turned on and the other turned off

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  • Can't find .Net 2.0 XML Schema

    - by Zach Smith
    I'm currently setting up an application config for a WPF application written in .Net 4.0. The connection string in the app.config is encrypted like so: <connectionStrings configProtectionProvider="DataProtectionConfigurationProvider"> <EncryptedData> <CipherData> <CipherValue>CypherValue</CipherValue> </CipherData> </EncryptedData> </connectionStrings> To use the EncryptedData element I need to include the XMLNS "http://schemas.microsoft.com/.NetConfiguration/v2.0". Attempting to include it produces an error as the schema cannot be found. Is there a way to include the schema or perhaps a different element I could use instead of EncryptedData?

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  • MVVM (ICommand) in Silverlight

    - by Andrey Khataev
    Hello! Please, don't judge strictly if this question was discussed previously or indirectly answered in huge nearby prism and mvvm blogs. In WPF implementation of RelayCommand or DelegateCommand classes there is a such eventhandler /// <summary> /// Occurs whenever the state of the application changes such that the result of a call to <see cref="CanExecute"/> may return a different value. /// </summary> public event EventHandler CanExecuteChanged { add { CommandManager.RequerySuggested += value; } remove { CommandManager.RequerySuggested -= value; } } but in SL subset of namespaces there are no CommandManager class. And this is where I'm stuck. I haven't yet found an workaround for this in MVVM adoptation for SL (PRISM is so complex for me yet). Different simple HelloWorldMVVM apps don't deal with at all. Thanks in advance and sorry for my English -)

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  • Exit Tks mainloop in Python?

    - by Olof
    I'm writing a slideshow program with Tkinter, but I don't know how to go to the next image without binding a key. import os, sys import Tkinter import Image, ImageTk import time root = Tkinter.Tk() w, h = root.winfo_screenwidth(), root.winfo_screenheight() root.overrideredirect(1) root.geometry("%dx%d+0+0" % (w, h)) root.focus_set() root.bind("<Escape>", lambda e: e.widget.quit()) image_path = os.path.join(os.getcwd(), 'images/') dirlist = os.listdir(image_path) for f in dirlist: try: image = Image.open(image_path+f) tkpi = ImageTk.PhotoImage(image) label_image = Tkinter.Label(root, image=tkpi) # ? label_image.place(x=0,y=0,width=w,height=h) root.mainloop(0) except IOError: pass root.destroy() I would like to add a time.sleep(10) "instead" of the root.mainloop(0) so that it would go to the next image after 10s. Now it changes when I press ESC. How can I have a timer there?

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  • Looking for a method to replace a string with a hyperlink

    - by Richard West
    I have a usercontrol in an asp web forms application that I am working on in C#. I am binding to a repeater and outputting a field of information, named "Text", using the following syntax: <%# DataBinder.Eval(Container.DataItem, "Text") %> I am looking for a method that will allow my to search for a keyword within the string that is returned from above, and replace that string with a hyperlink such as <a href="www.anysite.com/keyword">keyword</a>. I'm not very familer with user controls and getting data back in this manner so I am looking for advice on how this might be best handled. Thanks!

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  • AppDomain.UnhandeledException event not fired

    - by Yaakov Davis
    In a WPF application, the app simply crashes, without the above event being fired. (I'm also registered to DispatcherUnhandeledException, which doesn't fire as well.) I conclude that it doesn't fire since the handler is defined to place a log entry. When looking at the log, there's no corresponding entry. It happens in a production environment; I'm unable to point at a particular scenario. I've read few descriptions on scenarios where this might happen, but I still don't have a clear grasp on this. Can anyone share his experience / knowledge on this? How can I find the root of the crash and solve it? Many thanks.

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  • Continuous integration with .net and svn

    - by stiank81
    We're currently not applying the automated building and testing of continous integration in our project. We haven't bothered this far as we're only 2 developers working on it, but even with a team of 2 I still think it would be valuable to use continous integration and get a confirmation that our builds don't break or tests start failing. We're using .Net with C# and WPF. We have created Python-scripts for building the application - using MSbuild - and for running all tests. Our source is in SVN. What would be the best approach to apply continous integration with this setup? What tool should we get? It should be one which doesn't require alot of setup. Simple procedures to get started and little maintanance is a must.

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  • SVN hook script conflict

    - by user297303
    I am trying to write a pre-commit hook script that will alter a specific svn-property of a folder/file. The script looks fairly similar to the one that is documented in the svn book. I figured out how to set/change the property of a node and when executing the binding function svn.fs.commit_txn the property of the node actually gets set. But at the moment tortoise always gives me a conflict on the folder I am altering the property. I wrote my script with Python but am new python and hook scripts. Hope someone can give me a clue why I am getting this conflict..

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  • Is it possible to force ignore the :hover pseudoclass for iPhone/iPad users?

    - by christophercamps
    I have some css menus on my site that expand with :hover (without js) This works in a semi-broken way on iDevices, for example a tap will activate the :hover rule and expand the menu, but then tapping elsewhere doesn't remove the :hover. Also if there is a link inside the element that is :hover'ed, you have to tap twice to activate the link (first tap triggers :hover, second tap triggers link). I've been able to make things work nicely on iphone by binding the touchstart event. The problem is that sometimes mobile safari still chooses to trigger the :hover rule from the css instead of my touchstart events! I know this is the problem because when I disable all the :hover rules manually in the css, mobile safari works great (but regular browsers obviously don't anymore). Is there a way to dynamically "cancel" :hover rules for certain elements when the user is on mobile safari? I'm using jQuery.

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  • Spring - disable bind exceptions (for a particular property)

    - by Walter White
    Hi all, In a web application I'm working on using Spring 2.5.6.SEC01, I essentially have an Integer field that takes a number to determine which page to scroll to. The requirements changed, and we no longer want to display an error message, but simply ignore the user's input if they enter an invalid number, say "adfadf". I was reading that you can do that via: TypeMismatch.property=Some New Error Message However, after having tried that, we are still getting the original error message: java.lang.Integer.TypeMismatch=... I only want to disable this message for that given property. How can I do that? I still want binding to occur automatically, I just don't want to hear about it now. Walter

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  • Script Errors in Silverlight WebBrowser Control

    - by Whiskas
    Hi, I am showing a HTML page with a Flash video player on it in a Silverlight app using the WebBrowser control. The site itself is displayed perfectly and everything works just fine. But when I want to close the player component, I somehow need to completely dispose the current HTML page with the flash player. I tried navigating to about:blank, or even to other pages like google.com before the player component is hidden. But the flash video keeps on playing and the WebBrowser shows several Script Errors, which must be clicked in order to really leave the flash page. Is there any way to instantly "clear" the WebBrowser control or to surpress the Script Errors so that it leaves the html/flash page? In WPF there seem to be some methods for that, but I couldnt find any on the Silverlight WebBrowser control. Any hints are appreciated, Whiskas

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  • .NET 3.5 SP1 prerequisite, MS giving the clients 4.0

    - by Matt Bridges
    I have been using an MSI to install a WPF application using the .NET Framework 3.5 SP1. I have set up .NET 3.5 as a prerequisite in the MSI, and what has been happening for ages is that when the user does not have .NET 3.5 SP1, the MSI first has them download and install that before resuming the installation of my application. Since yesterday when MS released .NET 4.0, when users don't have .net 3.5 SP1, the MSI is directing them to install 4.0 instead. What happens though, is that after they finish installing 4.0, the MSI still detects that they don't have 3.5, and directs them to the 4.0 install site again. So the user has 4.0, but the MSI doesn't ever get to installing my application. What do I have to change in my application? This seems like an error with how MS is handling the prerequisites either on their server or in the MSI in VS 2008.

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  • Set property on usercontrol that can be used in custom panel in control... Silverlight

    - by Dimestore Cowboy
    I have a simple usercontrol that uses a simple custom panel where I just overrode the Orientation and Measure functions. What I want to do is to have a property in the usercontol to control the orientation So I basicaly have UserControl -- Listbox -- MyPanel And I want a property for the usercontrol that can be set in xaml (of type System.Windows.Controls.Orientation ) that I can bind to from my custom panel (or a different approach if binding isnt the right way to do it) It would be a bonus if that property could show up in the properties window and you could select vertical or horizontal. And a super bonus if I could change the property at design time and have the listbox/

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  • jQuery TriggerHandler doesn't trigger keyup event set via live

    - by Beck
    Why i can't trigget handler via triggerHandler if it's was bound via live? For example form.find('#code').live('change keyup',function(){ process_code($(this)); }); Startups after window load: /* Triggers */ if(checkCookie('banner_ready_code')) { $('#form').find('#code').triggerHandler('keyup'); } Nothing happens... If i'm binding simply by .change or .keyup, triggerHandler is working properly as intended. If it's bug, where to report it. Too lazy :) If not, please explain. :)

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  • Class inheritance in PHP 5.2: Overriding static variable in extension class?

    - by Christoffer
    Hi, I need to bea be able to use a static variable set in a class that extends a base class... from the base class. Consider this: class Animal { public static $color = 'black'; public static function get_color() { return self::$color; } } class Dog { public static $color = 'brown'; } echo Animal::get_color(); // prints 'black' echo Dog::get_color(); // also prints 'black' This works wonderfully in PHP 5.3.x (Dog::get_color() prints 'brown') since it has late static binding. But my production server runs PHP 5.2.11 and so I need to adapt my script. Is there a somewhat pretty workaround to solve this issue? Cheers! Christoffer

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  • C++/CLI com-Interop: Exposing a reference type property to VBA

    - by Adam
    After long hours of investigation on exposing C# property that accepts a reference type to VBA, I concluded that it was not possible. In brief, a C# property that is of type double[] or even an object cannot be consumed in VBA like this: ' Compile Error: Function or interface marked as restricted, ' or the function uses an Automation type not supported in Visual Basic oComExposedEarlyBinding.ObjectArray = VBArray ' Run-time error 424: Object required oComExposedEarlyBinding.PlainObject = VBArray Or for more details: C# property exposed to VBA (COM) : Run-time error '424': Object required I would like to know if C++/CLI would support such an option? i.e. Allowing a reference-type property to be exposed to VBA so that a syntax like the above is valid. N.B. You can achieve this by using late binding, but losing the intellisense is not an option.

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  • ASP.NET - fast Segmented downoad of file through webservice

    - by H4mm3rHead
    Hi, Im doing this project where i need to download files through a webservice (images, videos). The download MUST go through an existing webservice. The existing webservice was made when there were no need to upload and download files but the project has changed and now we need to do It through a webservice. Right now I have implemented the download as a method that returns a byte[], I open a streamreader and resds the entire file into a byte[] and returns it to my method. This is working file on small files <~1Mb, above it takes too long time. I want to show some progress (e.g. when the user downlaods a 20Mb video) which i cannot do right now. And i want to make it download much faster (is a strategy to use multithreading and several threads that downloads a part of the file?). It is within a WPF application i need to do this. Any ideas on how to approach this?

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