Dynamic Programming with WCF

re: Dynamic Programming with WCF

Pascal — Wed, 21 Feb 2007 17:50:52 GMT

Hi,

We had to face similar problematics, the result is two libraries.

The first one uses only .NET 2.0 and offers similar programmatic experience for Asmx, Remoting and Wse 3.0. You can have a look at http://www.codeplex.com/ProxyFactory.

The second uses WCF and it introduces the concept of leveraging a service metadata in order to retrieve at runtime its endpoint configuration therefore avoiding duplicating the configuration information on both service and all its clients. It is also leveraging ChannelFactory<T> for strongly typed proxy generation.

Article, video and sample code are available at this url : http://netfxfactory.org/blogs/papers/archive/2007/01/24/An-effective-way-to-access-wcf-services.aspx

We would be interested by your feedback.

re: Dynamic Programming with WCF

DJ Yang — Thu, 22 Feb 2007 02:30:51 GMT

Is there sample for "net.tcp://www.codeplex.com/ProxyFactory."?

Thanks a lot.

re: Dynamic Programming with WCF

Pascal — Sat, 17 Mar 2007 12:58:20 GMT

A remonting sample (tcp://localhost:9000/AccountManager.rem) is provided in the getting started of the ProxyFactory project.

And the SmartChannelFactory project based on WCF technology supports, of course, the NetTcpBinding.

re: Dynamic Programming with WCF

DashHunter — Thu, 24 May 2007 00:37:47 GMT

I tried to implement the same factory concept in my apps. , in which i want to dynamically invoke different third party webservices and is giving issues regarding the contracts. I will not be able to implement the contract info into these third aprty webservices, but i want to invoke them on fly.

How can i go about resolving it...

tips welcome..

re: Dynamic Programming with WCF

JeffAtAon — Fri, 13 Jul 2007 20:46:10 GMT

When I try to read WSDL using the dynamic proxy class in this blog, for certain web services I get the an error message similar to the following:

"Cannot import wsdl:binding\r\nDetail: The required WSDL extension element 'binding' from namespace 'http://schemas.xmlsoap.org/wsdl/http/' was not handled.\r\nXPath to Error Source: //wsdl:definitions[@targetNamespace='http://someurl.com']/wsdl:binding[@name='StockQuotesHttpGet']"

I've noticed that the error always occurs on web services with HttpPost and HttpGet bindings. I can read these web services successfully with webservicestudio, so I know the WSDL is valid. Could this be a WCF/WSE limitation? Any ideas on how to resolve it?

re: Dynamic Programming with WCF

Gustavo — Thu, 16 Aug 2007 16:30:18 GMT

Will it work with any kind of binding, including netMsmqBinding (with metadata through WS HTTP binding)?

re: Dynamic Programming with WCF

Rama — Thu, 27 Sep 2007 18:06:25 GMT

Hi Vipul

Can I use DynamicProxy with NetDataContractSerializer. I am trying to refer the NetDataContractSerializer (Aaron Skonnard's implementation) with Dynamic Proxy, and I am getting the dynamicproxy dll not found error while invoking the service. Any help is highly appreciated

Rama

re: Dynamic Programming with WCF

shikha — Thu, 31 Jan 2008 09:41:52 GMT

How to do Exception handling with Dynamic proxy

re: Dynamic Programming with WCF

Marco — Thu, 28 Feb 2008 16:41:02 GMT

Hi,

i'm testing this component but i have a problem. For certain wsdl document i receive this exception

"THERE WAS AN ERROR IN IMPORTING THE METADATA"

What does it mean?

re: Dynamic Programming with WCF

shilpa — Thu, 13 Mar 2008 14:50:27 GMT

Hi,

i'm testing this component but i have a problem. For certain wsdl document i receive this exception

"THERE WAS AN ERROR IN IMPORTING THE METADATA"

What does it mean?

re: Dynamic Programming with WCF

Jack — Thu, 13 Mar 2008 17:30:20 GMT

i just want to get on at school

re: Dynamic Programming with WCF

James — Mon, 07 Apr 2008 21:30:45 GMT

Thanks for the excellent work. I was able to incorporate this into a client console application in my environment, which works fine, but when using a WinForms client, the call to serviceFinder.Probe() always results in a timeout. I suspect this may be related to SynchronizationContext, but have been unable to overcome the issue. Any suggestions would be appreciated.

re: Dynamic Programming with WCF

vipulm — Mon, 19 May 2008 19:31:24 GMT

Thanks for using the sample and thanks for the comments. Let me try to answer some them here.

1. Can I use Dynamic Proxy with other bindings?

Yes you can.

2. I get an error while creating the factory.

Run SVCUTIL on the URL you are trying to create the proxy for. If SVCUTIL gives an error the dynamic proxy will. Try to debug the issue with SVCUTIL.

3. What about downloading the metadata through MEX endpoint instead of ?wsdl.

Yes, you can modify the sample to download metadata using System.ServiceModel.Description.MetadataExchangeClient.

4. What about complex types in my service contact, how do I use them?

If you already have the service contract and types pregenerated, you can simply create a channel factory using known service contract and binding and address given to you by the dynamic proxy factory.

If you do not have the service contract before hand, you are left with using Reflection. The sample provide an example of Complex type (DynamicComplexNumber.cs).

Dynamic Proxy and Memory Footprint

Vipul Modi's Blog — Fri, 17 Oct 2008 09:04:41 GMT

A while back I published a post about dynamic programming with WCF using the dynamic proxy library that

re: Dynamic Programming with WCF

Rahman — Sat, 18 Oct 2008 14:44:36 GMT

First, i must thank u for this great work!!!

I have a question: How can i call my service's Methods asynchronously? i want to use asynchronous operations by using this Library(Dynamic Proxy) but i haven't found any way.

Could u help me ....

thanks

Rahman

re: Dynamic Programming with WCF

Rahman Khanipour — Sun, 19 Oct 2008 15:46:03 GMT

Hi, I Solved My Problem!!

I changed the Library's Code and by that, asynchronous Operations generate Dynamically!

i will published the changed library in the CodeProject Site very Soon.

I Hope it will be useful ...

R. Khanipour

re: Dynamic Programming with WCF

rick watson — Fri, 31 Oct 2008 16:11:36 GMT

Good morning, I have tested your client with my application and have gotten data back from the database. the issue... my configuration files from app.config are not being read. the one which is complaining is maxreceivedmessagesize. unfortunately it is set to default of 65536. How can I get more data than this on a call to the database. thank you for any assistance. rick. You may respond also to rwatson@ogleveeltd.com

Properties with WCF

Vikas Jain — Fri, 20 Feb 2009 23:34:08 GMT

Hi Vipul,

How can I get my Properties in a Complex Type reconstructed in the Proxy code. Using the current code, the property names are replaced by their corresponding private variables in the proxy code.

Thanks,

Vikas

re: Dynamic Programming with WCF

ranger63 — Tue, 10 Mar 2009 00:37:37 GMT

I have a similar issue. I have xyz WCF Service that inherits from xyzBase. xyzBase has a property that I want to access. When I create a proxy class no metadata is generated for the property that is defined in the base class. In other words, when I try:

PropertyInfo fi = webService.GetType().GetProperty("ServiceHeaderValue");

it cannot find the ServiceHeaderValue propery. When I use traditional ASP.NET service this works fine. I can see using Lutz Reflector that the property is being exposed .. it just doesn;t seem to make it into the proxy class genertaed by svcutil.exe.

Any ideas would be greatly appreciated.

re: Dynamic Programming with WCF

Anil Koripelly — Fri, 13 Mar 2009 00:17:38 GMT

Hi Vipul

Is it possible to pass a cookie to the dynamic proxy before calling the invokeMember function. I am having trouble accessing an endpoint that needs to have authentication (We are implementing SSO). Many thanks for your help.

Kind Regards

re: Dynamic Programming with WCF

Kris — Tue, 17 Mar 2009 01:50:38 GMT

Hi Vipul,

I was able to extract the the input parameters to "MyMethod" function by doing the following:

DynamicProxy _dp = _dpf.CreateProxy(endpoint);

Type proxyType = _dp.ProxyType;

MethodInfo method = proxyType.GetMethod("MyMethod");

ParameterInfo[] inputParameters = method.GetParameters();

My output parameter is complex structure represented in the WSDL by the xml bellow. I am not sure how I can retrieve the type and name of each output parameter within the complex one!

<s:complexType name="ProcessStats">

<s:sequence>

<s:element minOccurs="1" maxOccurs="1" name="accessDenied" type="s:boolean"/>

<s:element minOccurs="1" maxOccurs="1" name="isRunning" type="s:boolean"/>

<s:element minOccurs="1" maxOccurs="1" name="processID" type="s:int"/>

<s:element minOccurs="0" maxOccurs="1" name="processName" type="s:string"/>

<s:element minOccurs="1" maxOccurs="1" name="totalRunTime" type="s:double"/>

<s:element minOccurs="0" maxOccurs="1" name="errorDescription" type="s:string"/>

</s:sequence>

</s:complexType>

The same is true for complex input parameters! Do you know if there is a clear way to do this?

Thank you very much.

re: Dynamic Programming with WCF

Pradyot Ranjan — Fri, 20 Mar 2009 11:48:35 GMT

Hi Vipul;

Thanks For your Post. can you please help me to solve one issue. I am using dynamicproxy dll in my client application, when I run my client application and try to invoke some services(WCF) its showing error saying that "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."

I google for this error and get a fix,When we add a service in our client Application it created binding configuration there we need to change MaxReceivedMessageSize.

my question is how we change MaxReceivedMessageSize value in DynamicProxy

re: Dynamic Programming with WCF

Srinivas — Sat, 04 Apr 2009 13:21:32 GMT

WSHttpBinding b = new WSHttpBinding(SecurityMode.None);

b.MessageEncoding = WSMessageEncoding.Mtom;

b.TransferMode = TransferMode.Streamed;

b.ReaderQuotas.MaxStringContentLength = 99999;

still i get error when i pass large data.

Help needed

re: Dynamic Programming with WCF

Harry Pooni — Mon, 13 Jul 2009 12:56:12 GMT

Can you provide example on how to create an instance of a custom DataMember class and use it within the Proxy?

re: Dynamic Programming with WCF

Boris — Sat, 29 Aug 2009 00:20:54 GMT

Works great, but I need to customize binding because my service host is Java based.

I tried to change factory.Bindings and add extra behaviors to factory.Endpoints, but they don't seem to be changing anything in the Proxy?

re: Dynamic Programming with WCF

Jin Khai (sovietmah@gmail.com) — Thu, 29 Oct 2009 06:30:05 GMT

How to connect to WCF web services and by passing complex data object?