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• How to create and show views on command request?

  - by user365575

  Hi, I've started using mvvm-light toolkit , and new to WPF. My question is: I want to create an pplication where the main window includes a grid with 2 columns 1 col command and col2 will display views when each command will be pressed. i want the views to be created on command and colsed from it's own view. I've tried to figure out how to do it but with no success. I don't know how to write this kind of funconality using the mvvm light. I just know how to create main window with mainview and another view creted already on load. Please help me out.. I'm using 2008 WPF3.5 Shirly. Make me happy today.. i've just started the week!!!

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• Books/resources on authentication and authorization in layered applications

  - by Tommy Jakobsen

  I've been trying to find resources and guidelines for implementing authentication and authorization in multiple layered architectures (C#), but haven't found any "best practices" or patterns to use. And I figured, that there must be some patterns for this, as it is a pretty important area? The application that we're developing, is layered traditionally, having data layer (Entity Framework 4) repositories domain layer service layer (can be WCF, with data transfer objects) multiple clients consuming the WCF service (ASP.NET [MVC], Silverlight, WPF) and clients accessing a service layer directly (no WCF) Are there books/articles/blogs that dig deeply into this area? Primarily about authorization such as handling multiple roles and attributes attached to users). It doesn’t have to be specific for the .NET Framework, but it would be preferred.

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• What advantages does Windows Embedded Enterprise give you?

  - by Max Schmeling

  My company has built a machine that measures wedge and roundness of lenses by reading and interacting with very precise indicators, motors, and a switch panel. The interface for the machine is a WPF application and it runs on Windows Vista on a normal PC bought from the store. I've never worked with Windows Embedded, but it sounds to me like it's intended for this type of system. My question is, what does it buy me? If I were to run this on Windows Embedded Enterprise (Vista) what benefits do I get? Do I get more control of the load, login, and all that? Can I make it more seamless where it doesn't really feel just like a normal application running full screen? Is it something I should look into more?

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• WCF SERVICE gives us faulted response

  - by malik

  My service is hosted on IIS7, windows 2008 server with sql server2008 express. I am getting following error when the process takes more than 2 minutes i got this response, i m unable to find out either it is due to sql server time out or wcf time out. my sql server process is also took long. An error occurred while receiving the HTTP response to http://REMOTE/SynchronizationService_test/SyncService.svc. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details.

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• Team Foundation Server 2010 Unmapping

  - by LeeHull

  Any idea how to unmap a project? Here is what I am trying to do, I changed the location of a source control, completely removed it from TFS source control.. but now it is showing up wanting to add it.. And the other issue I'm having is.. when I try to Map the new project, it is giving this error.. thing is, I've completely deleted the files off my local PC, and I'm wanting to map and get latest version from source control, but giving error trying to map, rather not change the location, how do I remove the old binding and the project, when it was already deleted using TfsDeleteProject.exe

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• There was no endpoint listening at http://localhost:49481/Marketing.svc that could accept the message

  - by duckmike

  I have a Marketing service running locally through port 49481 and through IIS on port 65000. Either way when I try to debug into that service, I get an error message - {"There was no endpoint listening at http:/localhost:49481/Marketing.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details."} My inner exception is - {"The remote server returned an error: (404) Not Found."} I can open that service address, http:/localhost:49481/Marketing.svc, through a browser and I get a message that it's running ok. My config file is set up like - <endpoint address="http://localhost:49481/Marketing.svc" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IMarketing" contract="SunriseMarketing.IMarketing" name="BasicHttpBinding_IMarketing" /> What am I missing?

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• Updating my database

  - by Malcolm

  I am new with the subsonic, and I have a problem when trying to update the database from the sql server. I have created a gridview by still is not returning the updates results. can you please help me? its getting an error code on dc.AddMostaHse(); (Cannot implicity convert type 'void to 'object') Here is the code being done of DataAccess.cs page public void AddMostaHse() { Mosta.MostaHSE1 xx = new MostaHSE1(); xx.ID = 94; xx.FunctionLocation = "lza94"; xx.acno = 12; xx.Save(); } Binding it with the gridview. { DataAccess dc = new DataAccess(); gvtest.DataSource = dc.AddMostaHse(); gvtest.DataBind(); }

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• What are some of the useful concepts to know about when building Silverlight apps?

  - by cody

  The Silverlight(& WPF) space seems to have a whole new nomenclature around it so at times I'm having a hard time figuring our what is important and useful to research a bit more. For example I 'know' about the MVVM pattern but I'm looking for things that are a bit smaller in scope, that is topics, ideas, programming constructs that might be used in implementing MVVM and would need to know before hand. So basically I'm looking for some of the key topics and concepts that people have found useful or are important when creating a Silverlight apps. And maybe why it is useful or important and when\where it might be applied or used. Thanks.

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• WCF - call same service from client and server side

  - by Steve

  I have a simple WCF service that I call server side from code behind via a service reference. It's used for validation and works and was automatically setup by Visual Studio and is using SOAP I think because the binding is wsHttpBinding. I want to use the same WCF service, but call it client side from jQuery using ajax(). I'm trying to implement it by way of these instructions. But if I make the changes to get the client side call working, I have to add the decoration below which I think will break what works on the server side and also change the system.serviceModel section in web.config. [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.Wrapped, ResponseFormat = WebMessageFormat.Json, RequestFormat= WebMessageFormat.Json) ] How do I have a WCF service that can be called both from the server-side and client side (jQuery/ajax)?

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• ASP .NET - What's going on behind an Eval() ?

  - by Amokrane

  Hi, I'm trying to understand how Eval() works for a specific purpose. I'm working on a project I don't really know and I need to read some data and put them in drop down list. These data are already read and are displayed inside an ItemTemplate. I noticed there are read using the Eval() method. Something like: <ItemTemplate> <a href="...=<%# Eval("foo") %>></a> </ItemTemplate> I need to know where Eval is getting these data from in order to discover where I should read them for my drop down list! But I didn't really understand how it works! I know that Eval() evaluates data binding expressions at runtime but where do you think I should take a look at? Thank you

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• How to create HTML email with embeded image and show it in the default mail client using .net (c#)?

  - by NVM

  If you look at the Snip tool in windows there is an option to send the snip as an embedded attachment in the default mail client (I guess as an html email). I need exactly that. At the moment I am using simple MAPI to attach the image but that does not allow embedding. One key requirement is that it should be created and then shown in the default mail client. I don't think I can use System.Net.Mail for that. Or can I? Its a WPF application using c#.

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• DataAnnotations: if (valid) => change Property

  - by Karl_Schuhmann

  hi i'm googling around about this problem but i didn't find any usfull about this. I want to deni the set of an property if the Validation per DataAnnotations fails Could you please tell me what i miss in my code? Model Codesnip private string _firstname; public string Firstname { get { return _firstname; } set { _firstname = value; RaisePropertyChanged(() => Reg(() => Firstname)); } } ViewModel Codesnip [Required] [RegularExpression(@"^[a-zA-ZäöüßÄÖÜß''-'\s]{2,40}$")] public string Name { get { return currentperson.Name; } set { currentperson.Name = value; RaisePropertyChanged(() => Reg(() => Name)); } } View Codesnip <TextBox HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Text="{Binding Firstname,UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"/> any help would be greatly appreciated

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• How do I bind Different Interfaces using Google Guice?

  - by kunjaan

  Do I need to create a new module with the Interface bound to a different implementation? Chef newChef = Guice.createInjector(Stage.DEVELOPMENT, new Module() { @Override public void configure(Binder binder) { binder.bind(FortuneService.class).to(FortuneServiceImpl.class); } }).getInstance(Chef.class); Chef newChef2 = Guice.createInjector(Stage.DEVELOPMENT, new Module() { @Override public void configure(Binder binder) { binder.bind(FortuneService.class).to(FortuneServiceImpl2.class); } }).getInstance(Chef.class); I cannot touch the Chef Class nor the Interfaces. I am just a client binding to Chef's FortuneService to different Interfaces at runtime.

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• jQuery > reset popup window 's x and y relative to icon that launched the window

  - by Scott B

  I have a jQuery jPicker colorpicker that is bound to an input text field and opens onclick of a small picker.gif icon. The problem I'm having is that (1) The colorpicker that opens does not appear to be positioned according to the x/y position of the picker.gif (it opens far away from the click point) and (2) The colorpicker does not seem to be aware of the viewport's scroll position (the top of the colorpicker is partially hidden at the top of the window). I'd like to use jQuery to reposition the colorpalette (1) Based on the x/y position of the input that its bound to and (2) reset it's top position based on the viewport's visible Y position. Here is the script where I am creating a new jPicker and binding it to my input text fields for header and sidebar... $('#myHeaderColor').jPicker ( {}, function(color) { $(this).val(color.get_Hex()); }, function(color) { $(this).val(color.get_Hex()); } ); $('#mySidebarColor').jPicker ( {}, function(color) { $(this).val(color.get_Hex()); }, function(color) { $(this).val(color.get_Hex()); } );

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• Combining RequiresSTA and Timeout attributes on a test fails

  - by Peter Lillevold

  I have a test that opens and closes a WPF Window and thus requires the STA threading apartment. To safeguard the test against the window staying open (and thus hang the test indefinitely) I wanted to use the Timeout attribute. The problem is that applying the Timeout attribute causes the test to fail on timeout regardless of whether the test works or not. Without the attribute everything works fine. My theory is that Timeout causes the test to be executed on a new thread that does not inherit the STA apartment. Is there another way to have both STA and the timeout safeguard in NUnit? My test looks something like this: [Test, RequiresSTA, Timeout(300)] public void Construct() { var window = new WindowView(); window.Loaded += (sender, args) => window.Close(); var app = new Application(); app.Run(window); try { // ...run system under test } finally { app.Shutdown(); } }

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• Order objects for Northwind Access database

  - by Artem Shnayder

  I need to build two objects: an OrderList and an Order. Using those two objects, I have to populate a DataGridView with a history of the orders. However, I am instructed not to use binding sources for the connection or other drag and drop controls. Unfortunately, from Google it seems like those are the most popular options for this type of problem. Can anyone point me in the right direction? I don't have much experience with C#. Thanks.

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• Rails + simple role system through associative table

  - by user202411

  So I have the Ninja model which has many Hovercrafts through ninja_hovercrafts (which stores the ninja_id and the hovercraft_id). It is of my understanding that this kind of arrangement should be set in a way that the associative table stores only enough information to bind two different classes. But I'd like to use the associative table to work as a very streamlined authorization hub on my application. So i'd also like this table to inform my system if this binding makes the ninja the pilot or co-pilot of a given hovercraft, through a "role" field in the table. My questions are: Is this ugly? Is this normal? Are there methods built into rails that would help me to automagically create Ninjas and Hovercrafts associations WITH the role? For exemple, could I have a nested form to create both ninjas and hcs in a way that the role field in ninjas_hovercrafts would be also filled? If managing my application roles this way isn't a good idea, whats the non-resource heavy alternative (my app is being designed trying to avoid scalability problems such as excessive joins, includes, etc) thank you

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• How to bind a List<DateTime> to a DataGridView/ListBox .NET C#

  - by nat

  Hi there I have a List that I want to bind to a DataGridView in a windows forms app. however, I cannot for the life of me find the DataPropertyName I need to show what I want. I have had similar problems with binding this list to a listbox. what i really want is to show .ToString("dddd, dd MMMM yyyy HH:mm"), or certainly more than the standard 'date' part of the datetime - do i need to add a property of my own? public partial class DateTime{ public string myFormat{ get{return this.ToString("dddd dd MMM yyyy HH:mm");} } } or some such? thanks nat

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• Which Visual Studio 2010 edition for sole developer

  - by bufferz

  I am the sole .net developer for a small company. My projects span many .net technologies including WinForms, WPF, SQL, XNA, Linq, WCF, WTF?, and others. I struggle staying on top of all these projects so I'm looking to make my life easier with the release of VS2010. Without a mentor I rely heavily on StackOverflow and whatever else Google comes up with. Should I convince my company to get an edition with an MSDN subscription? Is it one of those things where once you have it, you can't imagine life without it? What about the source control that comes with VS2010, do you all find it better than an SVN server? We're looking to hire another programmer this year, would I be best off getting a Team edition of VS2010 to be best prepared for that hire? Thanks!

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• ASP.NET MVC Filters: How to set Viewdata for Dropdown based on action paramter

  - by CRice

  Hi, Im loading an entity 'Member' from its id in route data. [ListItemsForMembershipType(true)] public ActionResult Edit(Member someMember) {...} The attribute on the action loads the membership type list items for a dropdown box and sticks it in viewdata. This is fine for add forms, and search forms (it gets all active items) but I need the attribute to execute BASED ON THE VALUE someMember.MembershipTypeId, because its current value must always be present when loading the item (i.e. all active items, plus the one from the loaded record). So the question is, what is the standard pattern for this? How can my attribute accept the value or should I be loading the viewdata for the drop down in a controller supertype or during model binding or something else? It is in an attribute now because the code to set the viewdata would otherwise be duplicated in each usage in each action.

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• Writable folder by all users on the same pc

  - by Catalin DICU

  I have a desktop .NET WPF application witch uses an embedded database (SQLite). Where to put the database file ? It's the same database for all users. I tried to use CommonAppData but it's not writable by non-admin users. So I tried to use a custom installer action to give write rights to all users to this folder but it fails on domain PCs. The code is: DirectorySecurity security = Directory.GetAccessControl(appDataPath); FileSystemAccessRule rule = new FileSystemAccessRule("Users", FileSystemRights.WriteData, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.InheritOnly, AccessControlType.Allow); security.AddAccessRule(rule); Directory.SetAccessControl(appDataPath, security); Would ".\Users" insead of "Users" work on a domain ? Is this the best approach ? Is there any other folder I could use ?

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• How to perform "shell" icon embedding in Visual Studio 2010?

  - by JustABill

  As far as I can tell, there have been (at least?) three types of icon embedding. There's the original style used by shell32.dll and friends, .Net's embedding, and the new type that WPF uses. I'm looking for how to perform the first one, as I want to have a few other icons available as resources for a jumplist, which can only accept that style. However, I can't figure out how to embed in this style, only the other two. How do I do this? All the results I find on google, etc are for adding icons to ResX files or similar. I am using C#, if it matters.

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• Winform datagridview selection is wrong after editing.

  - by jparram

  I am using a winform datagridview. The datagridviews datasource is a binding source. The gridview is using the CellEndEdit event to update the datasource. The datasource gets updated and the follwing property is set: public List<Collection> Collections { set { this.SubjectCollectionDOBindingSource.DataSource = value; } } If I end the cell editing with the 'enter' key, all works as expected. If I end the edit by clicking another cell, the data is updated as expeceted but subsequent clicks on cell columns do not correspond with the highlighted cell: ie the highlighted cell is the previously clicked cell. What steps are considered best practice when updating a gridview so that when all is said and done it is in the desired state?

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• Listbox that when you reach the end it goes back to the beginning

  - by Roy

  Hi, Is there a way to make a Listbox go back to the beginning of the list once a user scrolls all the way to the end of list? Current aspx code: <ListBox x:Name="listbox"> <ListBox.ItemTemplate> <DataTemplate> <Image Name="imgSource" Source="{Binding Path=Url}" /> </DataTemplate> </ListBox.ItemTemplate> </ListBox> Current code behind code: public class ImageScroller { public string Url { get; set; } } public MainPage() { InitializeComponent(); LoadImages(); } void LoadImages() { listbox.ItemsSource = new List<ImageScroller> { new ImageScroller { Url = "images/Chrysanthemum.jpg" }, new ImageScroller { Url = "images/Desert.jpg" }, new ImageScroller { Url = "images/Hydrangeas.jpg" }, }; } Thanks for your help!

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• .net, C# Interface between Business Logic and DAL

  - by Joel

  I'm working on a small application from scratch and using it to try to teach myself architecture and design concepts. It's a .NET 3.5, WPF application, and I'm using Sql Compact Edition as my data store. I'm working on the business logic layer, and have just now begun to write the DAL. I'm just using SqlCeComamnds to send over simple queries and SqlCeResultSet to get at the results. I'm starting to design my Insert and Update methods, and here's the issue - I don't know the best way to get the necessary data from the BLL into the DAL. Do I pass in a generic collection? Do I have a massive parameter list with all the data for the database? Do I simply pass in the actual business object (thus tying my DAL to the conrete stuff in the BLL?). I thought about using interfaces - simply passing IBusinessObjectA into the DAL, which provides the simplicity I'm looking for without tying me TOO tightly to current implementations. What do you guys think?

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