does not contain a constructor argument - error

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Dear all,

I would like to know how can setup argument for the following code, as it currently outputting an compiling error - 'user_feb2014.BasicAuthHandler' does not contain a constructor that takes 0 arguments - error.

Global.aspx class

C#

GlobalConfiguration.Configuration.MessageHandlers.Add(new BasicAuthHandler());

I have tried adding user parameters but it outputs even more error. If someone could please provide me with some guidance, that would be very helpful.

C#

public class BasicAuthHandler : DelegatingHandler
    {

        private const string BasicAuthResponseHeader = "WWW-Authenticate";
        private const string BasicAuthResponseHeaderValue = "Basic";

        private readonly iUser repository;

        public BasicAuthHandler(iUser repository)
      {
         this.repository = repository;
      }

Many thanks

Posted 20-Feb-14 1:15am

miss786

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Jackson K T 20-Feb-14 7:21am

Add a constructor with 0 arguments
public BasicAuthHandler()
{

}

miss786 20-Feb-14 7:27am

I tired adding that but that gives me error - "Object reference not set to an instance of an object"

on the following line of code:

api_login user = repository.Validate2(credentials[0], credentials[1]);

Thank you for your response and help.

1 solution

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OriginalGriff · Accepted Answer · 2014-02-20T01:27:00

Solution 1

Your constructor expects a parameter: an iUser class / interface instance to load into the repository variable in your class.

If you don't have one available (and I suspect you need to find one) then you will have to create a constructor that takes no arguments - but what that will do with your repository variable later is anybodies guess. It' will probably cause a failure later in the system.

Posted 20-Feb-14 1:27am

OriginalGriff

Comments

miss786 20-Feb-14 7:50am

Thank you so much for your response. I manage to update the global.aspx code to the following:
GlobalConfiguration.Configuration.MessageHandlers.Add(new BasicAuthHandler(new User()));

OriginalGriff 20-Feb-14 7:54am

:thumbsup: