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  • How to use "SelectMany" with DataServiceQuery<>

    - by sako73
    I have the following DataServiceQuery running agaist an ADO Data Service (with the update installed to make it run like .net 4): DataServiceQuery<Account> q = (_gsc.Users .Where(c => c.UserId == myId) .SelectMany(c => c.ConsumerXref) .Select(x => x.Account) .Where(a => a.AccountName == "My Account" && a.IsActive) .Select(a => a)) as DataServiceQuery<Account>; When I run it, I get an exception: Cannot specify query options (orderby, where, take, skip) on single resource As far as I can tell, I need to use a version of "SelectMany" that includes an additonal lambda expression (http://msdn.microsoft.com/en-us/library/bb549040.aspx), but I am not able to get this to work correctly. Could someone show me how to properly structure the "SelectMany" call? Thank you for any help.

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  • Svcutil.exe for .Net 4.0?

    - by D.H.
    I was trying to use svcutil.exe to generate proxy classes for a service but when I use the /reference option to reference an assembly that is built for .Net 4.0 I get an error. Could not load file or assembly [...] or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. So it seems that I am using an old version of svcutil.exe. I am using the one in "C:\Program Files\Microsoft SDKs\Windows\v7.0A which was the latest one I could find. Is there a later version somewhere that I am supposed to use?

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  • Way to concat strings when using binding in Silverlight

    - by Artur
    I wonder if there is a way of concating two strings in Silverlight inside xaml file. I have a DataGrid where one of the columns is 'Default Contact' and I would like to represent data in there as first and last name. <sdk:DataGridTextColumn Header="Default Contact" Binding="{Binding Path=DefaultContact.FirstName}" /> I was thinking about something like: Binding="{Binding Path=DefaultContact.FirstName + " " + DefaultContact.LasttName}" But this doesn't work. I don't even know if this is possible to achieve. Seems like really basic thing so I hope it is supported in some way. Any help would be greatly appreciated.

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  • FaultException<T>() exception thrown by the service is not caught by the client catch(FaultException

    - by Ashish Gupta
    Ok, I know I am missing something here. I have the following operation contract: public double DivideByZero(int x, int y) { if (y == 0) { throw new FaultException<ArgumentException> (new ArgumentException("Just some dummy exception") ,new FaultReason("some very bogus reason"), new FaultCode("007")); } return x / y; } And following is taken from the client:- Console.WriteLine("Enter the x value"); string x = Console.ReadLine(); Console.WriteLine("Enter the Y value"); string y = Console.ReadLine(); try { double val = client.DivideByZero(Convert.ToInt32(x), Convert.ToInt32(y)); Console.WriteLine("The result is " + val.ToString()); } catch(FaultException<ArgumentException> exp) { Console.WriteLine("An ArgumentException was thrown by the service "+ exp.ToString()); } catch (Exception exp) { Console.WriteLine(exp.ToString()); } In the above case catch(FaultException exp) (the first catch block with ArgumentException in the client code) block does not get executed. However, when I remove ArgumentException to have catch(FaultException exp), the same catch block gets executed. I am not sure about this as I am throwing FaultException from my operation contract. Am I missing anything here. Appreciate your help, Ashish

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  • How to achieve "Blendability" when using DataServiceCollection in my ViewModel

    - by andlju
    I'm looking at using oData endpoints in my Silverlight client. Naturally, I'm doing MVVM and I want the project to be nice and "Blendable" (i.e. I must be able to cleanly use static data instead of the oData endpoints when in design mode.) Now to the problem. I'd like to use the DataServiceCollection in my ViewModels, since it allows for nice bindable collections without having to worry too much with BeginExecute/EndExecute etc. Now, let's look at some code. My Model interface looks like this: public interface ITasksModel { IQueryable<Task> Tasks { get; } } The oData endpoint implementation of that interface: public class TasksModel : ITasksModel { Uri svcUri = new Uri("http://localhost:2404/Services/TasksDataService.svc"); TaskModelContainer _container; public TasksModel() { _container = new TaskModelContainer(svcUri); } public IQueryable<Task> Tasks { get { return _container.TaskSet; } } } And the "Blendable" design-time implementation: public class DesignModeTasksModel : ITasksModel { private List<Task> _taskCollection = new List<Task>(); public DesignModeTasksModel() { _taskCollection.Add(new Task() { Id = 1, Title = "Task 1" }); _taskCollection.Add(new Task() { Id = 2, Title = "Task 2" }); _taskCollection.Add(new Task() { Id = 3, Title = "Task 3" }); } public IQueryable<Task> Tasks { get { return _taskCollection.AsQueryable(); } } } However, when I try to use this last one in my ViewModel constructor: public TaskListViewModel(ITasksModel tasksModel) { _tasksModel = tasksModel; _tasks = new DataServiceCollection<Task>(); _tasks.LoadAsync(_tasksModel.Tasks); } I get an exception: Only a typed DataServiceQuery object can be supplied when calling the LoadAsync method on DataServiceCollection. First of all, if this is the case, why not make the input parameter of LoadAsync be typed as DataServiceQuery? Second, what is the "proper" way of doing what I'm trying to accomplish?

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  • Add Service Reference is generating Message Contracts

    - by JohnIdol
    OK, this has been haunting me for a while, can't find much on Google and I am starting to lose hope so I am reverting to the SO community. When I import a given service using "Add service Reference" on Visual Studio 2008 (SP1) all the Request/Response messages are being unnecessarily wrapped into Message Contracts (named as -- "operationName" + "Request"/"Response" + "1" at the end). The code generator says: // CODEGEN: Generating message contract since the operation XXX is neither RPC nor document wrapped. The guys who are generating the wsdl from a Java service say they are specifying DOCUMENT-LITERAL/WRAPPED. Any help/pointer/clue would be highly appreciated. Update: this is a sample of my wsdl for one of the operations that look suspicious. Note the mismatch on the message element attribute for the request, compared to the response. <!- imports namespaces and defines elements --> <wsdl:types> <xsd:schema targetNamespace="http://WHATEVER/" xmlns:xsd_1="http://WHATEVER_1/" xmlns:xsd_2="http://WHATEVER_2/"> <xsd:import namespace="http://WHATEVER_1/" schemaLocation="WHATEVER_1.xsd"/> <xsd:import namespace="http://WHATEVER_2/" schemaLocation="WHATEVER_2.xsd"/> <xsd:element name="myOperationResponse" type="xsd_1:MyOperationResponse"/> <xsd:element name="myOperation" type="xsd_1:MyOperationRequest"/> </xsd:schema> </wsdl:types> <!- declares messages - NOTE the mismatch on the request element attribute compared to response --> <wsdl:message name="myOperationRequest"> <wsdl:part element="tns:myOperation" name="request"/> </wsdl:message> <wsdl:message name="myOperationResponse"> <wsdl:part element="tns:myOperationResponse" name="response"/> </wsdl:message> <!- operations --> <wsdl:portType name="MyService"> <wsdl:operation name="myOperation"> <wsdl:input message="tns:myOperationRequest"/> <wsdl:output message="tns:myOperationResponse"/> <wsdl:fault message="tns:myOperationFault" name="myOperationFault"/> <wsdl:fault message="tns:myOperationFault1" name="myOperationFault1"/> </wsdl:operation> </wsdl:portType> Update 2: I pulled all the types that I had in my imported namespace (they were in a separate xsd) into the wsdl, as I suspected the import could be triggering the message contract generation. To my surprise it was not the case and having all the types defined in the wsdl did not change anything. I then (out of desperation) started constructing wsdls from scratch and playing with the maxOccurs attributes of element attributes contained in a sequence attribute I was able to reproduce the undesired message contract generation behavior. Here's a sample of an element: <xsd:element name="myElement"> <xsd:complexType> <xsd:sequence> <xsd:element minOccurs="0" maxOccurs="1" name="arg1" type="xsd:string"/> </xsd:sequence> </xsd:complexType> </xsd:element> Playing with maxOccurs on elements that are used as messages (all requests and responses basically) the following happens: maxOccurs = "1" does not trigger the wrapping macOcccurs 1 triggers the wrapping maxOccurs = "unbounded" triggers the wrapping I was not able to reproduce this on my production wsdl yet because the nesting of the types goes very deep, and it's gonna take me time to inspect it thoroughly. In the meanwhile I am hoping it might ring a bell - any help highly appreciated.

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  • Fiddler not sniffing SOAP traffic from ASP.NET website

    - by JohnIdol
    So far I've been successfully using fiddler to sniff web service traffic from both test fixtures, console apps and web projects. Today I noticed I am not able anymore to sniff that kind of traffic if I am running my web application (it's a ASP.NET website, hosted locally on IIS). I see all the local traffic but the web service traffic is just gone (the service is being hit as I do see the response debugging into the code). I am still able to successfully sniff soap requests and responses from test fixtures or console apps in the same solution (exact same environment). If it was a windows (I am on Win7) security update or the likes it would never work I guess (unless it affects only traffic routed through IIS). What should I be looking for that could cause the emergence this behavior? Any pointers appreciated!

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  • Weird - "The EntityReference object could not be serialized" when serializing from an ASP.NET Web Si

    - by Mikey Cee
    I have an Entity Framework data model. Part of the model is a Customer entity. The web service provides a method to get a customer, and to receive an updated version of this customer to be persisted. To test this, I created a new ASP.NET web Application, (Solution Add New Project ASP.NET Web Application), then added a reference to my service reference using the standard Add Service Reference dialog. I then call the service using the following code: var client = new CustomerServiceClient(); var customer = client.GetCustomerByID(18); // get it customer.LimitDown = 100; // change it client.SaveCustomer(customer); // persist it Everything works as expected. Now, I do exactly the same thing, but this time with as ASP.NET Web Site (Solution Add New Web Site ASP.NET Web Site). I add the reference in a similar fashion and copy and paste the code above into the new site. But now I get the following exception thrown on the 4th line: System.InvalidOperationException The EntityReference object could not be serialized. This type of object cannot be serialized when the RelationshipManager belongs to an entity object that does not implement IEntityWithRelationships. Source Error: Line 2474: Line 2475: public SkyWalkerCustomerService.OperationResult SaveCustomer(SkyWalkerCustomerService.Customer customer) { Line 2476: return base.Channel.SaveCustomer(customer); Line 2477: } Line 2478: } Stack Trace: System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) +9475203 System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) +345 SkyWalkerCustomerService.ICustomerService.SaveCustomer(Customer customer) +0 SkyWalkerCustomerService.CustomerServiceClient.SaveCustomer(Customer customer) in c:\Windows\Microsoft.NET\Framework\v4.0.30128\Temporary ASP.NET Files\testsite2\dd2bcf8d\f95604ff\App_WebReferences.fz4h7x7l.0.cs:2476 _Default.Page_Load(Object sender, EventArgs e) in c:\Users\Mike\Documents\Repositories\UWC\SkyWalker\TestSite2\Default.aspx.cs:17 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35 System.Web.UI.Control.OnLoad(EventArgs e) +91 System.Web.UI.Control.LoadRecursive() +61 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1966 Googling for this error returns very little. Why doesn't this work?

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  • Why am I getting: InvalidOperationException: Failed to map the path '/app42/App_Code/'.

    - by serialhobbyist
    I've been working on a little Silverlight utility which calls a Silverlight web service. It works from my dev machine (XPsp2). I've tried publishing it to a 2008 R2 IIS 7.5 server and it doesn't work when trying to contact the web service. So I've tried using the WcfTestClient to connect to the web service. That gave an error. So I turned off CustomErrors and used IE and I get the following. Any idea why? There's no App_Code folder in the app. Failed to map the path '/app42/App_Code/'. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: Failed to map the path '/app42/App_Code/'. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [InvalidOperationException: Failed to map the path '/app42/App_Code/'.] System.Web.Configuration.ProcessHostConfigUtils.MapPathActual(String siteName, VirtualPath path) +320 System.Web.Configuration.ProcessHostServerConfig.System.Web.Configuration.IServerConfig.MapPath(IApplicationHost appHost, VirtualPath path) +34 System.Web.Hosting.MapPathBasedVirtualPathEnumerator..ctor(VirtualPath virtualPath, RequestedEntryType requestedEntryType) +169 System.Web.Hosting.MapPathBasedVirtualPathCollection.System.Collections.IEnumerable.GetEnumerator() +43 System.Web.Compilation.CodeDirectoryCompiler.ProcessDirectoryRecursive(VirtualDirectory vdir, Boolean topLevel) +147 System.Web.Compilation.CodeDirectoryCompiler.GetCodeDirectoryAssembly(VirtualPath virtualDir, CodeDirectoryType dirType, String assemblyName, StringSet excludedSubdirectories, Boolean isDirectoryAllowed) +11196502 System.Web.Compilation.BuildManager.CompileCodeDirectory(VirtualPath virtualDir, CodeDirectoryType dirType, String assemblyName, StringSet excludedSubdirectories) +185 System.Web.Compilation.BuildManager.CompileCodeDirectories() +654 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +658 [HttpException (0x80004005): Failed to map the path '/app42/App_Code/'.] System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() +76 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +1012 System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters) +1025 [HttpException (0x80004005): Failed to map the path '/app42/App_Code/'.] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +11301302 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +88 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +4338644 Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927

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  • Problem during RIA authentication

    - by VexXtreme
    Hi I've built an authentication service in RIA that inherits from DomainService and IAuthenticate. The problem is following: When LoginOperation fails (loginOperation.LoginSuccess is false) due to wrong credentials, everything is ok and it is reported to the user. However, when login succeeds, I get throw a really weird exception: {System.ServiceModel.DomainServices.Client.DomainOperationException: Load operation failed for query 'Login'. Value cannot be null. Parameter name: validationErrors --- System.ArgumentNullException: Value cannot be null. Parameter name: validationErrors at System.ServiceModel.DomainServices.Client.QueryCompletedResult..ctor(IEnumerable1 entities, IEnumerable1 includedEntities, Int32 totalCount, IEnumerable`1 validationErrors) I don't really understand this. What is IEnumerable validationErrors, where does it appear and why does it have to be != null ? This started happening after I ported my authentication services from Nhibernate to Entity Framework. I've even tried googling this exception and apparently I'm the only one with this problem so far. Any help would be greatly appreciated.

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  • expected identity upn connecting to service as network service,

    - by Jim
    Hi, We have a web application, running in an application pool as 'NETWORK SERVICE'. The web application connects to a service (.svc) on another web server. The other web server also has the service hosted as 'NETWORK SERVICE'. I believe this is the default. The following endpoint, when run anywhere else works perfectly. <endpoint address="http://server123/UnitTrustService/UnitTrustService.svc" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_UnitTrustService" contract="UnitTrustServiceReference.UnitTrustService" name="WSHttpBinding_UnitTrustService"> <identity> <servicePrincipalName value="server123" /> </identity> </endpoint> Unfortunately when executed from the web site, we get the following error. System.ServiceModel.Security.MessageSecurityException: The identity check failed for the outgoing message. The expected identity is 'identity(http://schemas.xmlsoap.org/ws/2005/05/identity/right/possessproperty: http://schemas.xmlsoap.org/ws/2005/05/identity/claims/upn)' for the 'http://server123/UnitTrustService/UnitTrustService.svc' target endpoint. Server stack trace: at System.ServiceModel.Security.IdentityVerifier.EnsureIdentity(EndpointAddress serviceReference, AuthorizationContext authorizationContext, String errorString)... Any ideas? I have tried running this as local system on the web server machine with exactly the same configuration and it works perfectly. It has something to do with IIS? Regards Craig.

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  • Transaction timeout expired while using Linq2Sql DataContext.SubmitChanges()

    - by user68923
    Hi guys, please help me resolve this problem: There is an ambient MSMQ transaction. I'm trying to use new transaction for logging, but get next error while attempt to submit changes - "Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding." Here is code: public static void SaveTransaction(InfoToLog info) { using (TransactionScope scope = new TransactionScope(TransactionScopeOption.RequiresNew)) { using (TransactionLogDataContext transactionDC = new TransactionLogDataContext()) { transactionDC.MyInfo.InsertOnSubmit(info); transactionDC.SubmitChanges(); } scope.Complete(); } } Please help me. Thx.

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  • How to get an InstanceContext from a runtime proxy constructed from metadata of another service

    - by Don
    I have the following function trying to create a callback InstanceContext from metadata of other services. private InstanceContext GetCallbackIC(Type proxy, ServiceEndpoint endpoint){ try { IDuplexContextChannel dcc; PropertyInfo pi = proxy.GetProperty("InnerDuplexChannel"); if (pi.GetIndexParameters().Length > 0) { dcc = (IDuplexContextChannel)pi.GetValue(Activator.CreateInstance(proxy, OperationContext.Current.InstanceContext, endpoint.Binding, endpoint.Address), new object[] { 0 }); } else { dcc = (IDuplexContextChannel)pi.GetValue(Activator.CreateInstance(proxy, OperationContext.Current.InstanceContext, endpoint.Binding, endpoint.Address), null); } return new InstanceContext(dcc.CallbackInstance); } catch (Exception ex) { return null; } } "OperationContext.Current.InstanceContext" is not the right one here because it throws me an exception - "The InstanceContext provided to the ChannelFactory contains a UserObject that does not implement the CallbackContractType ..." How to get the InstanceContext of the proxy? Thanks

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  • Binding property to Silverlight dependency property independent of DataContext

    - by Simon_Weaver
    I'm trying to make an Address control that has an IsReadOnly property, which will make every TextBox inside read only when set to true. <my:AddressControl Grid.Column="1" Margin="5" IsReadOnly="True"/> I've managed to do this just fine with a dependency property and it works. Here's a simple class with the dependency property declared : public partial class AddressControl : UserControl { public AddressControl() { InitializeComponent(); this.DataContext = this; } public static readonly DependencyProperty IsReadOnlyProperty = DependencyProperty.Register("IsReadOnly", typeof(bool), typeof(AddressControl), null); public bool IsReadOnly { get { return (bool)GetValue(IsReadOnlyProperty); } set { SetValue(IsReadOnlyProperty, value); } } } In the XAML for this codebehind file I have a Textbox for each address line: <TextBox IsReadOnly="{Binding IsReadOnly}" Text="{Binding City, Mode=TwoWay}"/> <TextBox IsReadOnly="{Binding IsReadOnly}" Text="{Binding State, Mode=TwoWay}"/> <TextBox IsReadOnly="{Binding IsReadOnly}" Text="{Binding Zip, Mode=TwoWay}"/> Like i said this works just fine. The problem is that the Address control itself is bound to its parent object (I have several addresses I am binding). <my:AddressControl DataContext="{Binding ShippingAddress, Mode=TwoWay}" IsReadOnly="True"> <my:AddressControl DataContext="{Binding BillingAddress, Mode=TwoWay}" IsReadOnly="True"> The problem is that as soon as I set DataContext to something other than 'this' then the binding for IsReadOnly breaks. Not surprising because its looking for IsReadOnly on the Address data entity and it doesn't exist or belong there. I've tried just about every combination of binding attributes to get IsReadOnly to bind to the AddressControl obejct but can't get it working. I've tried things like this, but I can't get IsReadOnly to bind independently to the AddressControl property instead of its DataContext. <TextBox IsReadOnly="{Binding RelativeSource={RelativeSource Self}, Path=IsReadOnlyProperty}" Text="{Binding City, Mode=TwoWay}" /> I think I'm pretty close. What am I doing wrong?

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  • DataContractSerializer KnownType attribute not being respected?

    - by e28Makaveli
    I have a class that is decorated with a KnownType attribute with a type of the class. Is this not allowed? [KnownType(typeof(Occ600UIConfig))] public class Occ600UIConfig { } If so, why is the DCS throwing the following exception? {"Error in line 1 position 387. Element 'http://schemas.microsoft.com/2003/10/Serialization/Arrays:Value' contains data of the 'http://schemas.datacontract.org/2004/07/OCC600.Infrastructure.Dictionary.BusinessEntities:Occ600UIConfig' data contract. The deserializer has no knowledge of any type that maps to this contract. Add the type corresponding to 'Occ600UIConfig' to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding it to the list of known types passed to DataContractSerializer."}

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  • Need help understanding Generics, How To Abstract Types Question.

    - by kmacmahon
    I could use some really good links that explain Generics and how to use them. But I also have a very specific question, relater to working on a current project. Given this class constructor: public class SecuredDomainViewModel<TDomainContext, TEntity> : DomainViewModel<TDomainContext, TEntity> where TDomainContext : DomainContext, new() where TEntity : Entity, new() public SecuredDomainViewModel(TDomainContext domainContext, ProtectedItem protectedItem) : base(domainContext) { this.protectedItem = protectedItem; } And its creation this way: DomainViewModel d; d = new SecuredDomainViewModel<MyContext, MyEntityType>(this.context, selectedProtectedItem); Assuming I have 20 different EntityTypes within MyContext, is there any easier way to call the constructor without a large switch statement? Also, since d is DomainViewModel and I later need to access methods from SecuredDomainViewModel, it seems I need to do this: if (((SecuredDomainViewModel<MyContext, MyEntityType>)d).CanEditEntity) But again "MyEntityType" could actually be one of 20 diffent types. Is there anyway to write these types of statements where MyEntityType is returned from some sort of Reflection?

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  • Need help understanding Generics, How To Abstract Types Question.

    - by kmacmahon
    I could use some really good links that explain Generics and how to use them. But I also have a very specific question, relater to working on a current project. Given this class constructor: public class SecuredDomainViewModel<TDomainContext, TEntity> : DomainViewModel<TDomainContext, TEntity> where TDomainContext : DomainContext, new() where TEntity : Entity, new() And its creation this way: DomainViewModel d; d = new SecuredDomainViewModel<MyContext, MyEntityType>(this.context, selectedProtectedItem); Assuming I have 20 EntityTypes within MyContext, is there any easier way to call the constructor without a large switch statement? Also, since d is DomainViewModel and I want to access methods for SecuredDomainViewModel, it seems I need to do this: if (((SecuredDomainViewModel<MyContext, MyEntityType>)d).IsBusy) But again "MyEntityType" could actually be one of 20 types. Is there anyway to write these types of statements where MyEntityType is returned from some sort of Reflection?

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  • What appid should I use with netsh.exe ?

    - by Brann
    The netsh command wants an appid (see here) : netsh http add sslcert ipport=0.0.0.0:8000 certhash=0000000000003ed9cd0c315bbb6dc1c08da5e6 appid={00112233-4455-6677-8899-AABBCCDDEEFF} I've not been able so far to understand how I'm supposed to know the GUID netsh wants me to provide. Any hints?

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  • Shawn Wildermuth violating MVVM in MSDN article?

    - by rasx
    This may be old news but back in March 2009, Shawn Wildermuth, his article, “Model-View-ViewModel In Silverlight 2 Apps,” has a code sample that includes DataServiceEntityBase: // COPIED FROM SILVERLIGHTCONTRIB Project for simplicity /// <summary> /// Base class for DataService Data Contract classes to implement /// base functionality that is needed like INotifyPropertyChanged. /// Add the base class in the partial class to add the implementation. /// </summary> public abstract class DataServiceEntityBase : INotifyPropertyChanged { /// <summary> /// The handler for the registrants of the interface's event /// </summary> PropertyChangedEventHandler _propertyChangedHandler; /// <summary> /// Allow inheritors to fire the event more simply. /// </summary> /// <param name="propertyName"></param> protected void FirePropertyChanged(string propertyName) { if (_propertyChangedHandler != null) { _propertyChangedHandler(this, new PropertyChangedEventArgs(propertyName)); } } #region INotifyPropertyChanged Members /// <summary> /// The interface used to notify changes on the entity. /// </summary> event PropertyChangedEventHandler INotifyPropertyChanged.PropertyChanged { add { _propertyChangedHandler += value; } remove { _propertyChangedHandler -= value; } } #endregion What this class implies is that the developer intends to bind visuals directly to data (yes, a ViewModel is used but it defines an ObservableCollection of data objects). Is this design diverging too far from the guidance of MVVM? Now I can see some of the reasons why Shawn would go this way: what Shawn can do with DataServiceEntityBase is this sort of thing (which is intimate with the Entity Framework): // Partial Method to support the INotifyPropertyChanged interface public partial class Game : DataServiceEntityBase { #region Partial Method INotifyPropertyChanged Implementation // Override the Changed partial methods to implement the // INotifyPropertyChanged interface // This helps with the Model implementation to be a mostly // DataBound implementation partial void OnDeveloperChanged() { base.FirePropertyChanged("Developer"); } partial void OnGenreChanged() { base.FirePropertyChanged("Genre"); } partial void OnListPriceChanged() { base.FirePropertyChanged("ListPrice"); } partial void OnListPriceCurrencyChanged() { base.FirePropertyChanged("ListPriceCurrency"); } partial void OnPlayerInfoChanged() { base.FirePropertyChanged("PlayerInfo"); } partial void OnProductDescriptionChanged() { base.FirePropertyChanged("ProductDescription"); } partial void OnProductIDChanged() { base.FirePropertyChanged("ProductID"); } partial void OnProductImageUrlChanged() { base.FirePropertyChanged("ProductImageUrl"); } partial void OnProductNameChanged() { base.FirePropertyChanged("ProductName"); } partial void OnProductTypeIDChanged() { base.FirePropertyChanged("ProductTypeID"); } partial void OnPublisherChanged() { base.FirePropertyChanged("Publisher"); } partial void OnRatingChanged() { base.FirePropertyChanged("Rating"); } partial void OnRatingUrlChanged() { base.FirePropertyChanged("RatingUrl"); } partial void OnReleaseDateChanged() { base.FirePropertyChanged("ReleaseDate"); } partial void OnSystemNameChanged() { base.FirePropertyChanged("SystemName"); } #endregion } Of course MSDN code can seen as “toy code” for educational purposes but is anyone doing anything like this in the real world of Silverlight development?

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  • Chaining IQueryables together

    - by Matt Greer
    I have a RIA Services based app that is using Entity Framework on the server side (possibly not relevant). In my real app, I can do something like this. EntityQuery<Status> query = statusContext.GetStatusesQuery().Where(s => s.Description.Contains("Foo")); Where statusContext is the client side subclass of DomainContext that RIA Services was kind enough to generate for me. The end result is an EntityQuery<Status> object who's Query property is an object that implements IQueryable and represents my where clause. The WebDomainClient is able to take this EntityQuery and not just give me back all of my Statuses but also filtered with my where clause. I am trying to implement this in a mock DomainClient. This MockDomainClient accepts an IQueryably<Entity> which it returns when asked for. But what if the user makes the query and includes the ad hoc additional query? How can I merge the two together? My MockDomainClient is (this is modeled after this blog post) ... public class MockDomainClient : LocalDomainClient { private IQueryable<Entity> _entities; public MockDomainClient(IQueryable<Entity> entities) { _entities = entities; } public override IQueryable<Entity> DoQuery(EntityQuery query) { if (query.Query == null) { return _entities; } // otherwise want the union of _entities and query.Query, query.Query is IQueryable // the below does not work and was a total shot in the dark: //return _entities.Union(query.Query.Cast<Entity>()); } } public abstract class LocalDomainClient : System.ServiceModel.DomainServices.Client.DomainClient { private SynchronizationContext _syncContext; protected LocalDomainClient() { _syncContext = SynchronizationContext.Current; } ... public abstract IQueryable<Entity> DoQuery(EntityQuery query); protected override IAsyncResult BeginQueryCore(EntityQuery query, AsyncCallback callback, object userState) { IQueryable<Entity> localQuery = DoQuery(query); LocalAsyncResult asyncResult = new LocalAsyncResult(callback, userState, localQuery); _syncContext.Post(o => (o as LocalAsyncResult).Complete(), asyncResult); return asyncResult; } ... }

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  • Workflow Foundation 4 - DeclarativeServiceLibrary - Error while calling second ReceiveAndSendReply

    - by dotnetexperiments
    Hi, I have created a DeclarativeServiceLibrary using VS2010 beta 2, Please check this image of Sequential Service Following is the code used to call these two activities ` int? data = 123; ServiceReference1.ServiceClient client1 = new ServiceReference1.ServiceClient(); string result1 = client1.GetData(data); //This line shows error :( string result2 = client1.Operation1(); Response.Write(result1 + " :: ::" + result2);` client1.GetData works perfectly, but client1.Operation1 show the following error. Please let me know how to fix this. There is no context attached to the incoming message for the service and the current operation is not marked with "CanCreateInstance = true". In order to communicate with this service check whether the incoming binding supports the context protocol and has a valid context initialized.

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  • All about WSDL vs MEX?

    - by Aakash
    I am not able to open the meta data url - http://localhost:8082/Tasks/mex I have added the mexhttpBinding in the config file. Can I see this mex endpoint in browser? The config files look like: <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> Questions: Is Mex is differ from WSDL? If no, why do we require MEX endpoing over WSDL? In the WSDL, I see the WSDL types information missing. Is it by default? Can I look at the type information in WSDL? Thanks in advance.

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  • Expose url to webservice

    - by Patrick Peters
    In our project we want to query a document management system for a specific document or movie. The dms returns a URL with the document location (for example: http://mydomain.myserver1.share/mypdf.pdf or http://mydomain.myserver2.share/mymovie.avi). We want to expose the document to internet users and intranet users. The requested file can be large (large video files). Our architecture is like: request goes like: webapp1 - webapp2 - webapp3 - dms response goes like: dms - webapp3 - webapp2 - webapp1 webapp1 could be on the internet. I have have been thinking how we can obfusicate the real url from the dms, due to security issues. I have seen implementations from other webapps where the pdf URL was obfusicated by creating a temp file for the requested document that is specific for the session and user. So other users cannot easily guess the documentname of other users. My question: is there a pattern that deals with exposing company/user vulernable data to the public ? Our development is in C# 3.5.

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  • [Silverlight] DataGrid

    - by nCdy
    I'm making tutorials. Silverlight + MSSQL And I'm on the last step when it says "Copy-paste my code and tada it will works"... :-/ But after I added System.Windows.Controls.Data reference it still can't find Error 3 The type or namespace name 'Data' does not exist in the namespace 'System.Windows.Controls' (are you missing an assembly reference?) I really don't miss the reference ... Maybe I need to add it somehow else or ... I really have no idea. (VSWDEE2010)

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  • How to perform insert and update with Ado.net dataservices (EF and Inheritance)

    - by Thurein
    Hi, I have an entity model, in which I have a table per type inheritance. There are 3 types, first, Contact, which I defined as abstract in my EF model and the rest are Company and person types which are derived from contact type. Is it possible to perform an insert using ado.net dataservice and asp.net ajax library? I was trying the following client code : dataContext.insertEntity(person, "Contacts"); I was getting this response from server : Error processing request stream. Type information must be specified for types that take part in inheritance. Thanks.

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