I'm going to talk about a number of the getting to know related subjects of WCF in my series of upcoming articles which enable you on your real international utility development. With the help of this article, I'm able to just going to introduce the new characteristic of asp.Net three.5 that is WCF. The overall shape of WCF is windows verbal exchange foundation which means it is impartial offerings hosted on some web server for the reusability inside your internet application by adding internet reference which makes a developer paintings very clean.

You've got seen the verbal exchange of internet software, right here in this article I am going to reveal how one software communicates with other. Following are a few listings of capabilities of WCF.

WCF includes the following set of features. For more information, see WCF Feature Details.

One consequence of using WS standards is that WCF enables you to create service-oriented applications. Service-oriented architecture (SOA) is the reliance on Web services to send and receive data. The services have the general advantage of being loosely coupled instead of hard-coded from one application to another. A loosely-coupled relationship implies that any client created on any platform can connect to any service as long as the essential contracts are met.

WCF implements modern industry standards for Web service interoperability. For more information about the supported standards, see Interoperability and Integration.

Messages are exchanged in one of several patterns. The most common pattern is the request/reply pattern, where one endpoint requests data from a second endpoint. The second endpoint replies. There are other patterns such as a one-way message in which a single endpoint sends a message without any expectation of a reply. A more complex pattern is the duplex exchange pattern where two endpoints establish a connection and send data back and forth, similar to an instant messaging program. For more information about how to implement different message exchange patterns using WCF see Contracts.

WCF supports publishing service metadata using formats specified in industry standards such as WSDL, XML Schema, and WS-Policy. This metadata can be used to automatically generate and configure clients for accessing WCF services. Metadata can be published over HTTP and HTTPS or using the Web Service Metadata Exchange standard. For more information, see Metadata.

Because WCF is built using the .NET Framework, it also includes code-friendly methods of supplying the contracts you want to enforce. One of the universal types of contracts is the data contract. In essence, as you code your service using Visual C# or Visual Basic, the easiest way to handle data is by creating classes that represent a data entity with properties that belong to the data entity. WCF includes a comprehensive system for working with data in this easy manner. Once you have created the classes that represent data, your service automatically generates the metadata that allows clients to comply with the data types you have designed. For more information, see Using Data Contracts.

Messages can be encrypted to protect the privacy and you can require users to authenticate themselves before being allowed to receive messages. Security can be implemented using well-known standards such as SSL or WS-SecureConversation. For more information, see Security.

Multiple means of transport and Encodings

Messages can be sent on any of several built-in transport protocols and encodings. The most common protocol and encoding are to send text encoded SOAP messages using the HyperText Transfer Protocol (HTTP) for use on the World Wide Web. Alternatively, WCF allows you to send messages over TCP, named pipes, or MSMQ. These messages can be encoded as text or using an optimized binary format. Binary data can be sent efficiently using the MTOM standard. If none of the provided transports or encodings suit your needs you can create your custom transport or encoding. For more information about transports and encodings supported by WCF see Transports.

WCF supports reliable message exchange using reliable sessions implemented over WS-Reliable Messaging and using MSMQ. For more information about reliable and queued messaging support in WCF see Queues and Reliable Sessions.

A durable message is never lost due to a disruption in communication. The messages in a durable message pattern are always saved to a database. If a disruption occurs, the database allows you to resume the message exchange when the connection is restored. You can also create a durable message using the Windows Workflow Foundation (WF). For more information, see Workflow Services.

WCF also supports transactions using one of three transaction models: WS-AtomicTransactions, the APIs in the System. Transactions namespace, and Microsoft Distributed Transaction Coordinator. For more information about transaction support in WCF see Transactions.

REST is an example of an evolving Web 2.0 technology. WCF can be configured to process "plain" XML data that is not wrapped in a SOAP envelope. WCF can also be extended to support specific XML formats, such as ATOM (a popular RSS standard), and even non-XML formats, such as JavaScript Object Notation (JSON).

The WCF architecture has several extensibility points. If the extra capability is required, several entry points allow you to customize the behavior of a service. For more information about available extensibility points see Extending WCF.

Overview of WCF

I have a WCF Service which returns 1000 records from database to the client. I have an ASP.NET WCF client (I have added service reference in asp.net web application project to consume WCF).

I get the following message when I run the client application:

 (The maximum message size quota for incoming messages (65536) has been exceeded. To increase the quota, use the MaxReceivedMessageSize property on the appropriate binding element.)

 Any help? How to increase message size quota? 

WCF - How to Increase Message Size Quota

I have a WCF service and I want to expose it as both a RESTfull service and as a SOAP service. Anyone has done something like this before? 

REST / SOAP endpoints for a WCF service

I am totally confused between WCF and ASMX web services. I have used a lot of web services in my earlier stage, and now there is this new thing introduced called WCF. I can still create WCF that function as a web service. I think there will be more stuff in WCF.

What are the differences between WCF and Web services? When should each one be used?

What are the differences between WCF and ASMX web services?

I get the following error when going through the WCF tutorial.

HTTP could not register URL http://+:8000/ServiceModelSamples/Service/. Your process does not have access rights to this namespace (see http://go.microsoft.com/fwlink/?LinkId=70353 for details).

Is this something caused by a restriction on Windows 7?

WCF ServiceHost access rights

How do I increase the default timeout to larger than 1 minute on a WCF service? 

Increasing the timeout value in a WCF service

Sometimes adding a WCF Service Reference generates an empty reference.cs and I cannot reference the service anywhere in the project.

Sometimes adding a WCF Service Reference generates an empty reference.cs

 Public elegance MYDTO  {public string call; public string type; public object value;}  and I migrate the WCF to gRPC.NET 
 ASP.NET center provider.

gRPC ASP.NET Core: what type to use instead of object?

I've a WCF service that accepts a complicated kind and returns some information. I want to use fiddler to look what the incoming requests to the provider seems like. The client is .NET console app which uses a carrier reference proxy. Is that this possible with fiddler. I am new to this device and feature best used it in the past to publish facts with the request builder.

How to use Fiddler to monitor WCF service

I've spent some months seeking to hold close the concepts behind WCF and lately I've developed my first WCF provider software.

I've struggled pretty a piece to apprehend all of the settings in the config record.

I am not satisfied approximately the surroundings but you may do superb stuff with it.

The other day I've located out that Microsoft has come out with a new aspect known as ASP.Net WEB API.

From what I'm able to read it is a Restful Framework, very smooth to use and implement.

Now, I am trying to determine out what are the principle variations between the two frameworks and if I must try to convert my vintage WCF carrier application with the new API.

WCF vs ASP.NET Web API

I'm seeking to get a WCF provider going for walks in iis8 on windows server 2012 build 8400.

Whilst installing the net role the WCF stuff (below 3.51) wasn't to be determined like in windows server 2008.

When I installed the svc handler mapping was missing, so I did :

%windir%\Microsoft.NET\Framework\v3.0\WindowsCommunication Foundation\ServiceModelReg.exe –i

Now the handler mapping is there, however, I nonetheless get:

The resource you are looking for does not have a handler associated with it.

WCF on IIS8; *.svc handler mapping doesn't work

This is a WCF service in a windows carrier. The method notify subscribers() is referred to as via the carrier on every occasion there's a statistics event (at random durations, but no longer very frequently - approximately 800 times in line with day).

Whilst a home windows paperwork purchaser subscribes, the subscriber identity is added to the subscriber's dictionary, and whilst the patron unsubscribes, it's far deleted from the dictionary. The mistake happens when (or after) a client unsubscribes. It seems that the next time the notify subscribers() approach is known as, the foreach() loop fails with the mistake in the concerned line. The approach writes the mistake into the utility log as shown in the code below. When a debugger is attached and a purchaser unsubscribes, the code executes fine.

Do you see a problem with this code? Do I need to make the dictionary thread-safe?

[ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)]

public class SubscriptionServer : ISubscriptionServer

    private static IDictionary<Guid, Subscriber> subscribers;

        subscribers = new Dictionary<Guid, Subscriber>();

    public void NotifySubscribers(DataRecord sr)

        foreach(Subscriber s in subscribers.Values)

                s.Callback.SignalData(sr);

                DCS.WriteToApplicationLog(e.Message, 

                  System.Diagnostics.EventLogEntryType.Error);

                UnsubscribeEvent(s.ClientId);

    public Guid SubscribeEvent(string clientDescription)

        Subscriber subscriber = new Subscriber();

        subscriber.Callback = OperationContext.Current.

                GetCallbackChannel<IDCSCallback>();

        subscribers.Add(subscriber.ClientId, subscriber);

    public void UnsubscribeEvent(Guid clientId)

            subscribers.Remove(clientId);

            System.Diagnostics.Debug.WriteLine("Unsubscribe Error " + 

Collection was modified; enumeration operation may not execute

I'm growing a WCF net service and that I used the WCF carrier application template to do that.

Does growing a "WCF carrier application" fulfill this requirement? What is the advantage of creating a WCF service library over a WCF provider utility?

What is the difference between a WCF Service Application and a WCF Service Library?

I have some code that makes a name to a 3rd-birthday party web carrier this is secured the usage of x.509 certifications.

If I name the code without delay (the usage of a unit take a look at) it works without any troubles.

Whilst deployed, this code might be called via a WCF service. I have introduced a 2d unit take a look at that calls the WCF service, however, this fails with a cryptographic exception, the message "keyset does no longer exist" when I came away on the 1/3-birthday celebration web service.

I presume that that is because my WCF provider will be trying to name the 1/3-birthday celebration web service the usage of a specific person than myself.

Cryptographic Exception 'Keyset does not exist', but only through WCF

I have a WCF service that is hosted in a home windows carrier. Clients that use this service have to bypass an identifier every time they're calling provider techniques (because identifier is critical for what the known technique needs to do). I idea it is a great idea to by some means put this identifier to the WCF header data.

If it is a superb concept, how am I able to add the identifier routinely to the header information. In different phrases, each time the consumer calls the WCF method, the identifier must be robotically brought to the header.

How to add a custom HTTP header to every WCF call?

The old workaround become to run aspnet_regiis -however, this command seems to have been deprecated in Windows 8 yielding a response this selection isn't supported on this version of the working system. (...).

(i have successfully enabled normal aspx pages already, so a maximum of the IIS config seems healthful.)

Seemed to be a no-brainer; the WCF service should be enabled using Programs and Features -> Turn Windows features on or off in the Control Panel. Go to .NET Framework Advanced Services -> WCF Services and enable HTTP Activation as described in this blog post on mdsn.

From the command prompt (as admin), you can run:

C:\> DISM /Online /Enable-Feature /FeatureName:WCF-HTTP-Activation

C:\> DISM /Online /Enable-Feature /FeatureName:WCF-HTTP-Activation45

C:\> DISM /Online /Enable-Feature /all /FeatureName:WCF-HTTP-Activation

C:\> DISM /Online /Enable-Feature /all /FeatureName:WCF-HTTP-Activation45

Cannot serve WCF services in IIS on Windows 8

I am used to growing a. Internet framework console application and exposing an upload(int x, int y) characteristic thru a WCF service from scratch with magnificence library (.Internet framework). I then use the console application to proxy name this characteristic inside the server.

However, if I exploit console app (.Internet center) and a category library (.Net core) the machine. The service model isn't available. I've completed a few googling but I have not found out what "replaces" WCF in this example.

How do I disclose an add(int x, int y) feature within a category library to a console software all inside? Internet core? I see gadget.Servicemodel.Net, and when you consider that this is attempting to be a moving platform do I ought to create a restful carrier?

What replaces WCF in .Net Core?

I apprehend the cost of the three-part provider/host/patron version provided using WCF. However is it just me or does it appear to be wcf took something pretty direct (the ASMX version) and made a multitude out of it?

Is there an alternative to the usage of svcutil's command line step again in time to generate the proxy? With ASMX offerings a take a look at harness become automatically supplied; is there a terrific opportunity today with WCF?

I admire that the ws* stuff is more tightly incorporated with WCF and wish to find some payoff for WCF there, but geez, otherwise I'm at a loss for words.

Also, the state of books available for WCF is abysmal at quality. Juval Lowy, an awesome creator, has written an excellent O'Reilly reference book "programming WCF offerings" but it doesn't do that plenty (for me anyway) for gaining knowledge of how to apply WCF. That book's precursor (and a little higher prepared, however now not tons, as a tutorial) is Michele Leroux Bustamante's getting to know WCF. It has accurate spots however is old in place and its corresponding net website is long past.

Does WCF raise the bar or just the complexity level?

Seemingly you could effortlessly obtain a purchaser IP address in WCF three.5 but no longer in WCF three. Zero. Does anyone understand how?

Obtaining client IP address in WCF 3.0

Simply thinking beneath what situations might you prefer to generate a proxy from a WCF carrier when you may simply invoke calls the use of the channel factory?

In this manner, you might not need to generate a proxy and worry approximately regenerating a proxy while the server is up to date?

WCF Channel Factory vs generating proxy

I have a big pdf record which I need to split into a couple of pdfs or chunks before I upload to the server(every other WCF carrier). I've approached to send massive files(>2 Mb) to the server with the aid of splitting them more than one pdfs or one pdf into chunks. Can anyone tell me this is a way to attain? I found the articles the use iTextSharp however it is a deprecated one. I do not use certified ones. Will we have any viable manner to obtain this?

I've followed the following article. However, they've used iTextSharp that is a deprecated one.

Split large PDF file in to multiple pdfs in C#

I have hard and fast consumer-defined types which already implement a Serializable interface, now I would like to host them in server-facet software and reveal a few of these sorts to the purchaser by marking them with data contract attribute.

Sadly, I cannot mark the equal magnificence with data contract characteristic as it's far already serializable and it reasons runtime exception.

However, at the identical time, I cannot remove the serializable implementation inside the vintage person-defined kind.

A person pls help me how do I reveal these kinds to the consumer. With the aid of marking data contracts and without doing away with serializable.

Using Data Contract Attribute and ISerializable

In my WCF provider, I must make a call to an API, in which I wanted to do a fireplace and neglect implementation. And if possible just seize the errors if any. (that is nice too, if not a choice)

I'm making plans to do the following implementation, what are the issues it can result in? Via doing the subsequent implementation goes to go away a huge quantity of open connections. Or what might be the difficulty? Please help in information how in a higher manner this may be implemented.

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);

    request.ContentType = "application/xml";

    byte[] requestBytes = Encoding.UTF8.GetBytes(inputXML);

    using (Stream requestStream = request.GetRequestStream())

        requestStream.Write(requestBytes, 0, requestBytes.Length);

C # Http Web Request , Fire and forget an API call

There's HTML code written for the download button. The complete SharePoint 2013 hosted software functionality has js code. There's a WCF solution the use of c# to get information from sap gadget. There may be one page in the application which has a download button. As soon as clicked using the user, the file must get downloaded from azure blob garage. Kindly assist with how we can obtain this.

firstly made a textarea where all the text input will be issued.

make an anchor tag using createElement property and then assigning it the download and href attribute.

encodeURIComponent will encode everything with special meaning, so you use it for components of URIs. 
For example, if we have text like “Hello: Geek ?”, there are special characters in this, so encodeURIComponent will encode them and append it for further usage.

data:text/plain; charset=utf-8 is the attribute value of href (like href=” “), it specifies that the value must be of type text and with UTF-8 type encoding. The click() method simulates a mouse-click on an element.

After that we simply call our download function with the text from textarea and our file name “GFG.txt” as parameters on the input button with id ‘btn’.

var element = document.createElement('a');

// <a href="path of file" download="file name">

var text = document.getElementById("text").value;

javascript code to download files from Azure blob storage

I wrote a username password validator descendant for validation purposes (basic HTTP binding).

The hassle is after I validate a person towards a lower back carrier I get hold of its identifier that I must use in carrier-class technique. That turns out to be a massive hassle... Until you realize a way to do it ...

Is there some other authorization opportunity that I will now not bypass username/password in approach header or even worse in method's parameters of the carrier?

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