How to resolve Could not load file or assembly 'System.Web.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.

Question

User-1167631307 posted

How to resolve this exception in asp.net core

Answer 1

User1120430333 posted

How to resolve this exception in asp.net core 

You need to find the Sysytem.Web.Services DLL based on its version number and publickey token and place it in the Bin folder so that the program can find it. Where is the DLL? Why is it not in the Bin folder is what you  have to figure out.

https://docs.microsoft.com/en-us/dotnet/api/system.web.services.webservice?view=netframework-4.8

You can use Nuget possible to install the DLL by its version number.

Answer 2

User-1167631307 posted

Could not load file or assembly 'System.Web.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified. 

this dll is used in class library which is built in .NET 4.8 and and this class library referenced in .NET Core 

Please also provide Nuget name 

Answer 3

User475983607 posted

Could not load file or assembly 'System.Web.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified. 

this dll is used in class library which is built in .NET 4.8 and and this class library referenced in .NET Core 

Please also provide Nuget name 

As stated in your other thread, the library is not compatible with ASP.NET Core.  You'll need to stick with .NET to use the very old library.

Answer 4

User1120430333 posted

I

kalva

Could not load file or assembly 'System.Web.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified. 

this dll is used in class library which is built in .NET 4.8 and and this class library referenced in .NET Core 

Please also provide Nuget name 

As stated in your other thread, the library is not compatible with ASP.NET Core.  You'll need to stick with .NET to use the very old library.

I would think that it would be more than a 'not found' exception being thrown if the assembly was not compatible with .NET Core. Right now,  the exception thrown is that the program manifest can't find the DLL based on version number and publickey token.

Answer 5

User1120430333 posted

Please also provide Nuget name 

System.Web.Services is the name of the DLL if you look at the provided documentation link in the first reply post.

Answer 6

User475983607 posted

I would think that it would be more than a 'not found' exception being thrown if the assembly was not compatible with .NET Core. Right now,  the exception thrown is that the program manifest can't find the DLL based on version number and publickey token.

Click on your original link and select any of the Core versions from the list.  The library is only available in .NET.  Also, Core 3.x is not compatible with .NET.

Answer 7

User-1167631307 posted

basicInvoke parameters = new basicInvoke();
parameters.scopeCoordinateIds = LBCTConfigurationManager.SharedInstance.GetConfigurationValueAsString("LBCT/LBCT/LBCT/LBCT");
parameters.xmlDoc = xml;

LBCTArgoWebService service = new LBCTArgoWebService(username, password);

_logger.Info("service.Url=" + service.Url);

int timeout = LBCTConfigurationManager.SharedInstance.GetConfigurationValueAsInt("1200", -1);

service.Timeout = timeout == -1 ? -1 : timeout * 1000;

service.Url = LBCTConfigurationManager.SharedInstance.GetConfigurationValueAsString("http://n4tst.lbct.llc/apex/services/argobasicservice");

_logger.Info("Url (from config) =" + service.Url);

basicInvokeResponse response = null;

try
{
response = service.basicInvoke(parameters);
}
catch (Exception e)
{
_logger.Info("Exception=" + e.Message);
_logger.Info("StackTrace=" + e.StackTrace);

throw e;
}

string result = response.basicInvokeResponse1;
//string result = string.Empty;

_logger.Debug("received response xml='" + result + "'");

stopWatch.Stop();

_logger.Info("elapsedMilliseconds=" + stopWatch.ElapsedMilliseconds + " elapsed=" + stopWatch.Elapsed + " user=" + username + " request=" + xml + " response=" + result);

return result;

Answer 8

User-1167631307 posted

please help me above code is throwing system.web.services exception when its referring from .net core 

Answer 9

User1116182075 posted

1 ) .dll properties path set true

2) unistall and install again

Answer 10

User475983607 posted

Correct me if I'm wrong but the reference documentation clearly and openly states that System.Web.Services is not part of the .NET standard or .NET Core.  The library cannot be used in a Core project.  It seems your experiment proves this.

https://docs.microsoft.com/en-us/dotnet/api/system.web.services.webservice?view=netframework-4.8

Use the "connected services" feature if you need to create a proxy.

https://docs.microsoft.com/en-us/dotnet/core/additional-tools/wcf-web-service-reference-guide