Consumption of webservice with preventive authentication

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Hello, sorry for my translation, I hope you understand, at the moment I am making the consumption of a webservice from an application developed in c #. The consumption from the SoapUI program is achieved successfully, activating a preference that is called, preventive authentication, its user and password are configured in the tab called "Auth".
However, when I try to send a header with the user and the password returns the error "(500) Internal error of the server", the webservice associates it with the project as a web reference, as recommended by one of the pages in which I found a solution .

What I have tried:

*So far, I associated the WS to the project as a service reference and as a web reference.
*I added the following lines of code to send in the header the credentials and thus recreate the preventive authentication.

string auth = "Basic " + Convert.ToBase64String(System.Text.Encoding.Default.GetBytes(wsParams[0] + ":" + wsParams[1]));
                req.PreAuthenticate = true;
                req.AuthenticationLevel = System.Net.Security.AuthenticationLevel.MutualAuthRequested;
                req.Headers.Add("Authorization", auth);
                WebResponse resp = req.GetResponse();

*After obtaining the answer (500), I tried to recreate by SoapUI the user and password in the header, without success. Which brings me to the second code test.
*Try to send the authentication using the credentials property from the previous code, but in the same way I get the answer (500)

NetworkCredential networkCredential = new NetworkCredential(wsParams[0], wsParams[1]);
				req.Credentials = networkCredential;
                req.PreAuthenticate = true;
				WebResponse myWebResponse = req.GetResponse();

From here on I have tried almost everything but still can not get the consumption of the ws by code, I would greatly appreciate an idea of how I can make the consumption.
Be attentive

Posted 15-Jun-18 12:03pm

Catherinne Herrera

Updated 18-Jun-18 2:12am

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TarunShrivastav · Accepted Answer · 2018-06-18T02:13:00

// Create the network credentials and assign
// them to the service credentials
NetworkCredential netCredential = new NetworkCredential("wsParams[0]", "wsParams[1]");
Uri uri = new Uri(service.Url);
ICredentials credentials = netCredential.GetCredential(uri, "Basic");
service.Credentials = credentials;

//  set PreAuthenticate to true
// authentication will not be sent.
service.PreAuthenticate = true;

------------
Using req.credentials gives problem with WebMethods because the header part doesnt contain even Preauthentication is set to true So it returns

500 Internal Server Error

request.Credentials = new NetworkCredential(username,password)."

Calling web services using basic authentication - IntelliTect[^]