Implementing a Custom Membership Provider –MembershipProvider Control

• Created a new Class called SQLMemebershipProvider:
• Inherits from the abstract MembershipProvider class, which virtual methods of concern will be overridden.
• Must reference: System.Web.Security, System.Collections.Specialized
• Edit web.config and add within <system.web> tag
  

  <membership defaultProvider="SecurityTutorialsMembershipProvider">

    <providers>

      <clear/>

      <add name="SQLMembershipProvider"

           type="deDogs.Data.SqlMembershipProvider"

           connectionStringName="SecurityTutorialsConnectionString"

           enablePasswordRetrieval="false"

           enablePasswordReset="true"

           requiresQuestionAndAnswer="false"

           applicationName="SecurityTutorials"

           requiresUniqueEmail="true"

           passwordFormat="Hashed"

           maxInvalidPasswordAttempts="5"

           minRequiredPasswordLength="6"

           minRequiredNonalphanumericCharacters="1"

           passwordAttemptWindow="10"

           passwordStrengthRegularExpression=""

           />

    </providers>

  </membership>

The name, type, and connectionStringName tags from above are important.

• Name is the name of the custom Membership Provider: SQLMembershipProvider
  
• type is the class name, because Classes are types, so since I have placed the SQLMembershipProvider class within my custom namespaces (deDogs.Data), the type would be deDogs.Data.SQLMembershipProvider.
  
• connectionStringName is the connection name of the SQL database created for membership schema (Creating The Membership Schema in SQL Server).

All attributes of the <add> tag are passed to the Initialize method of the MembershipProvider class. Passed in the collection parameter. Overridding the method the attribute values can be retrieved from the System.Collections.Specialized.NameValueCollection. The Initialize method:

I created one property above, which isn’t shown below in the code:

public override void Initialize(string name, NameValueCollection config)

{

    if (config == null)

    {

        throw new ArgumentNullException("config");

    }

    if (name == null || name.Length == 0)

    {

        name = "SQLMembershipProvider";

    }

    if (config["requiresQuestionAndAnswer"] == "true")

    {

        requiresQuestionAndAnswer = true;

    }

    base.Initialize(name, config);

}

The requiresQuestionAndAnswer attribute value is used to set the RequiresQuestionAndAnswer property. Must override readonly property:

public override readonly bool RequiresQuesionAndAnswe

{

    get

        {

            if (requiresQuestionAndAnswer)

                {

                    return true;

                }

                else

               {

                   return false;

               }

        }

}

Inheriting MembershipProvider abstract class, the class is populated with all methods that are overridden. They all return an NotImplementedException. Remove the exception.

public override bool RequiresQuestionAndAnswer

{

    get { throw new NotImplementedException(); }

}

and enter in the exception’s place: