C# – What could be the reason for this WCF error

cvisual studiowcfwcf-binding

My WCF service[using basicHttpBinding] is hosted on IIS 6.Am able to access it using ?wsdl in the service url in IE browser .

I've a presenation layer in my winforms client and I added the reference of this service using ServiceReferences option in VS.Net which then generated a proxy.

When I call a method on this service, am getting this exception.What could I be missing here ?Thanks.

"Value cannot be null.Parameter name uri." at
System.ServiceModel.Description.ClientViaBehavior..ctor(Uri uri)
at System.ServiceModel.Configuration.ClientViaElement.CreateBehavior()
at
System.ServiceModel.Description.ConfigLoader.LoadBehaviors[T](ServiceModelExtensionCollectionElement1 behaviorElement, KeyedByTypeCollection1 behaviors, Boolean
commonBehaviors)

at
System.ServiceModel.Description.ConfigLoader.LoadChannelBehaviors(ServiceEndpoint
serviceEndpoint, String configurationName)

at System.ServiceModel.ChannelFactory.ApplyConfiguration(String
configurationName) at
System.ServiceModel.ChannelFactory.InitializeEndpoint(String
configurationName, EndpointAddress address) at
System.ServiceModel.ChannelFactory1..ctor(String endpointConfigurationName, EndpointAddress remoteAddress) at System.ServiceModel.EndpointTrait1.CreateSimplexFactory() at
System.ServiceModel.EndpointTrait1.CreateChannelFactory() at System.ServiceModel.ClientBase1.CreateChannelFactoryRef(EndpointTrait1 endpointTrait) at System.ServiceModel.ClientBase1.InitializeChannelFactoryRef() at
System.ServiceModel.ClientBase`1..ctor() at
TestingClient..ctor() in C:\Presentation\Service
References\ServiceReference1\Reference.cs:line 268

Here is my config xml for server and client:

*Server:

<system.serviceModel> 
    <bindings> 
      <basicHttpBinding> 
        <binding name="ProviderBinding" closeTimeout="00:01:00" openTimeout="00:01:00" 
               receiveTimeout="00:10:00" sendTimeout="00:10:00" allowCookies="false" 
               bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" 
               maxBufferSize="2147483647" maxBufferPoolSize="524288" maxReceivedMessageSize="2147483647" 
               messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> 
          <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" 
                        maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
          <security mode="Transport"> 
            <transport clientCredentialType="None" proxyCredentialType="None" realm="" /> 
            <message clientCredentialType="UserName" algorithmSuite="Default" /> 
          </security> 
        </binding> 
      </basicHttpBinding> 
    </bindings> 
    <services> 
      <service name="PTSWeb.PriceTestingService" behaviorConfiguration="PTSWeb.Service1Behavior"> 
        <!-- Service Endpoints --> 
        <endpoint address="" binding="basicHttpBinding" contract="PTSWeb.IPriceTesting"> 
          <identity> 
            <dns value="localhost"/> 
          </identity> 
        </endpoint> 
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> 
      </service> 
    </services> 
    <behaviors> 
      <serviceBehaviors> 
        <behavior name="PTSWeb.Service1Behavior"> 
                <serviceMetadata httpGetEnabled="true"/> 
          <serviceDebug includeExceptionDetailInFaults="true"/> 
        </behavior> 
      </serviceBehaviors> 
    </behaviors> 
  </system.serviceModel>

*Client:

<system.serviceModel> 
    <client> 
      <endpoint address="http://localhost/PTSWeb/PTSWebService.svc" 
        behaviorConfiguration="PTSWeb.Service1Behavior" binding="basicHttpBinding" 
        bindingConfiguration="IPriceTestingBinding" contract="IPriceTesting" 
        name="IPriceTestingPort" /> 
      <endpoint address="https://qaserver/webservice" 
                binding="basicHttpBinding" bindingConfiguration="ProviderBinding" 
                contract="Provider" name="ProviderPort" />      
    </client> 
    <bindings> 
      <basicHttpBinding> 
        <binding name="IPriceTestingBinding" closeTimeout="00:01:00" 
          openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:10:00" 
          allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" 
          maxBufferSize="2147483647" maxBufferPoolSize="524288" maxReceivedMessageSize="2147483647" 
          messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" 
          useDefaultWebProxy="true"> 
          <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" 
            maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
          <security mode="None" /> 
        </binding> 
        <binding name="ProviderBinding" closeTimeout="00:01:00" openTimeout="00:01:00" 
               receiveTimeout="00:10:00" sendTimeout="00:10:00" allowCookies="false" 
               bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" 
               maxBufferSize="2147483647" maxBufferPoolSize="524288" maxReceivedMessageSize="2147483647" 
               messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> 
          <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" 
                        maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
          <security mode="Transport"> 
            <transport clientCredentialType="None" proxyCredentialType="None" realm="" /> 
            <message clientCredentialType="UserName" algorithmSuite="Default" /> 
          </security> 
        </binding> 
      </basicHttpBinding> 
    </bindings> 

    <behaviors> 
      <endpointBehaviors>      
        <behavior name="PTSWeb.Service1Behavior"> 
          <clientVia/> 
        </behavior> 
      </endpointBehaviors> 
  </behaviors> 
  </system.serviceModel>

Best Answer

In the client config behavior, you have a ClientVia element without any URI defined. Either remove this behavior or define the via Uri.

This quite well explain the goal and usage of the clientvia behavior : http://blogs.msdn.com/b/anilkumargupta/archive/2009/05/16/wcf-intermediate-service-between-client-and-server.aspx

This is the style that Microsoft tends to use in their examples.

It appears that the guidance in this area may have changed, as StyleCop now enforces the use of the C# specific aliases.

C# – What are the correct version numbers for C#

C# language version history:

These are the versions of C# known about at the time of this writing:

C# 1.0 released with .NET 1.0 and VS2002 (January 2002)
C# 1.2 (bizarrely enough); released with .NET 1.1 and VS2003 (April 2003). First version to call Dispose on IEnumerators which implemented IDisposable. A few other small features.
C# 2.0 released with .NET 2.0 and VS2005 (November 2005). Major new features: generics, anonymous methods, nullable types, and iterator blocks
C# 3.0 released with .NET 3.5 and VS2008 (November 2007). Major new features: lambda expressions, extension methods, expression trees, anonymous types, implicit typing (var), and query expressions
C# 4.0 released with .NET 4 and VS2010 (April 2010). Major new features: late binding (dynamic), delegate and interface generic variance, more COM support, named arguments, tuple data type and optional parameters
C# 5.0 released with .NET 4.5 and VS2012 (August 2012). Major features: async programming, and caller info attributes. Breaking change: loop variable closure.
C# 6.0 released with .NET 4.6 and VS2015 (July 2015). Implemented by Roslyn. Features: initializers for automatically implemented properties, using directives to import static members, exception filters, element initializers, await in catch and finally, extension Add methods in collection initializers.
C# 7.0 released with .NET 4.7 and VS2017 (March 2017). Major new features: tuples, ref locals and ref return, pattern matching (including pattern-based switch statements), inline out parameter declarations, local functions, binary literals, digit separators, and arbitrary async returns.
C# 7.1 released with VS2017 v15.3 (August 2017). New features: async main, tuple member name inference, default expression, and pattern matching with generics.
C# 7.2 released with VS2017 v15.5 (November 2017). New features: private protected access modifier, Span<T>, aka interior pointer, aka stackonly struct, and everything else.
C# 7.3 released with VS2017 v15.7 (May 2018). New features: enum, delegate and unmanaged generic type constraints. ref reassignment. Unsafe improvements: stackalloc initialization, unpinned indexed fixed buffers, custom fixed statements. Improved overloading resolution. Expression variables in initializers and queries. == and != defined for tuples. Auto-properties' backing fields can now be targeted by attributes.
C# 8.0 released with .NET Core 3.0 and VS2019 v16.3 (September 2019). Major new features: nullable reference-types, asynchronous streams, indices and ranges, readonly members, using declarations, default interface methods, static local functions, and enhancement of interpolated verbatim strings.
C# 9.0 released with .NET 5.0 and VS2019 v16.8 (November 2020). Major new features: init-only properties, records, with-expressions, data classes, positional records, top-level programs, improved pattern matching (simple type patterns, relational patterns, logical patterns), improved target typing (target-type new expressions, target typed ?? and ?), and covariant returns. Minor features: relax ordering of ref and partial modifiers, parameter null checking, lambda discard parameters, native ints, attributes on local functions, function pointers, static lambdas, extension GetEnumerator, module initializers, and extending partial.

In response to the OP's question:

What are the correct version numbers for C#? What came out when? Why can't I find any answers about C# 3.5?

There is no such thing as C# 3.5 - the cause of confusion here is that the C# 3.0 is present in .NET 3.5. The language and framework are versioned independently, however - as is the CLR, which is at version 2.0 for .NET 2.0 through 3.5, .NET 4 introducing CLR 4.0, service packs notwithstanding. The CLR in .NET 4.5 has various improvements, but the versioning is unclear: in some places it may be referred to as CLR 4.5 (this MSDN page used to refer to it that way, for example), but the Environment.Version property still reports 4.0.xxx.

As of May 3, 2017, the C# Language Team created a history of C# versions and features on their GitHub repository: Features Added in C# Language Versions. There is also a page that tracks upcoming and recently implemented language features.

Best Answer

Related Solutions

C# – the difference between String and string in C#

This is the style that Microsoft tends to use in their examples.

C# – What are the correct version numbers for C#

C# language version history:

In response to the OP's question:

Related Topic