System.ServiceModel.dll中发生类型'System.InvalidOperationException'的异常，但未在用户代码中处理

Question

I have two projects called A and B . Now, i have one service class in B project and inside the service class, i have one endpoint like below:

Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel

' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
' <System.Web.Script.Services.ScriptService()> _
<System.Web.Services.WebService(Namespace:="http://tempuri.org/")> _
<System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<ToolboxItem(False)> _
Public Class ReportAPIService
    Inherits System.Web.Services.WebService

    <WebMethod()> _
    Public Function HelloWorld() As String
        Return "Hello World"
    End Function

End Class

Now, i want to call this endpoint from another WebAPI project and which is A . So, to achieve this, at first i ran the B project locally in my environment. Then, added a service reference of the ReportAPIService in my A project and it has been added successfully. I gave the service address as below:

http://localhost:4043/ReportAPIService/ReportAPIService.asmx

Then, i added below code to call the endpoint in project A .

ReportAPIServiceSoapClient soapClient = new ReportAPIServiceSoapClient();        
return soapClient.HelloWorld();

But, it gives me the below error when trying to initialize ReportAPIServiceSoapClient() :

An exception of type 'System.InvalidOperationException' occurred in System.ServiceModel.dll but was not handled in user code

Additional information: Could not find default endpoint element that references contract 'ReportService.ReportAPIServiceSoap' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this contract could be found in the client element.

What should i have to add in the client configuration section?

Then, i tried with HTTPClient like below:

HttpClient client = new HttpClient();
client.BaseAddress = new Uri("http://localhost:4043/ReportAPIService/ReportAPIService.asmx/");
client.DefaultRequestHeaders.Accept.Clear();
HttpResponseMessage response = await client.GetAsync("HelloWorld");
return await response.Content.ReadAsStringAsync();

But, stuck at the GetAsync method. No response from the server.

web.config in WCF service:

<system.serviceModel>
  <bindings>
    <basicHttpBinding>
      <binding name="ReportAPIServiceSoap" />
    </basicHttpBinding>
  </bindings>
  <client>
    <endpoint address="http://localhost:4043/ReportAPIService/ReportAPIService.asmx"
 binding="basicHttpBinding" bindingConfiguration="ReportAPIServiceSoap"
 contract="ReportService.ReportAPIServiceSoap" name="ReportAPIServiceSoap" />
  </client>
 </system.serviceModel>

Is there any other way to call a endpoint of a project from an another project in ASP.NET?

Answer 1

Your configuration looks wrong to me. A simplified one looks like below. See Documentation for more information

<system.serviceModel>
    <services>  
      <service name="<Provide Fully qualified service name>">  
            <endpoint address="http://localhost:4043/ReportAPIService/ReportAPIService.asmx"
                   binding="basicHttpBinding" contract="ReportService.ReportAPIServiceSoap"/>  
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>  
      </service>  
    </services> 
 </system.serviceModel>