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Can you explain what you did to solve this problem?  I am encountering the same issue.

Hi Brian

Can you desribe what triggers the problem and what version of Umbraco that you're using?

/Jan

I'm running Umbraco 4.7.1.  I'm trying to use the ActiveDirectoryMembershipProvider to handle both front-end and back-end logins.  It works OK for the backend user logins, but when I try to use it for the front-end members part I'm running intro trouble.  If I try to restrict a page to members only, a I get the "parameter username must not be empty" error.

Stack trace is:

[ArgumentException: The parameter 'username' must not be empty.
Parameter name: username]
   System.Web.Util.SecUtility.CheckParameter(String& param, Boolean checkForNull, Boolean checkIfEmpty, Boolean checkForCommas, Int32 maxSize, String paramName) +2385941
   System.Web.Security.ActiveDirectoryMembershipProvider.CheckUserName(String& username, Int32 maxSize, String paramName) +30
   System.Web.Security.ActiveDirectoryMembershipProvider.GetUser(String username, Boolean userIsOnline) +86
   System.Web.Security.Membership.GetUser(String username, Boolean userIsOnline) +63
   umbraco.requestHandler..ctor(XmlDocument umbracoContent, String url) +4588
   umbraco.UmbracoDefault.Page_PreInit(Object sender, EventArgs e) +1062
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   System.Web.UI.Page.OnPreInit(EventArgs e) +9009622
   System.Web.UI.Page.PerformPreInit() +31
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +328

I seem to have figured out a solution.  Basically, what is happening is that Umbraco tries verifying the username against the provider first even if there is nobody actively logged in yet.  The default ActiveDirectoryMembershipProvider sees the username is missing (because the user hasn't been prompted to enter it yet) then throws an exception.  Umbraco sees the exception and stops rather than giving the login prompt.

To work around the problem, I ended up creating my own custom provider that overrides the GetUser() function in ActiveDirectoryMembershipProvider.  If the username string is null or empty, it retuns null.  Also, if GetUser() throws an exception, it catches the exception and returns null instead.  Umbraco sees the null return as a sign it should present the login dialog.

My source is:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;

namespace UmbracoMembership
{
    public partial class CS101ADMembershipProvider : System.Web.Security.ActiveDirectoryMembershipProvider
    {
        public override MembershipUser GetUser(string username, bool userIsOnline)
        {
            // If username is blank, return nothing.
            if (String.IsNullOrEmpty(username))
            {
                return null;
            }

            try
            {
                return base.GetUser(username, userIsOnline);
            }
            catch (Exception e)
            {
                return null;
            }
        }
    }
}

I have the same issue, i create a member register usercontrol load by macros and when every input are empty and click the create user button, it came out below, what i expect is a reload or error message lable. should i over ride any classes? or any idear , i am so new on Umbraco.

Server Error in '/' Application.

The username of a Member must be different from an emptry string
Parameter name: loginName

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: The username of a Member must be different from an emptry string
Parameter name: loginName

Source Error:

Stack Trace:

[ArgumentException: The username of a Member must be different from an emptry string
Parameter name: loginName]
   umbraco.cms.businesslogic.member.Member.GetMemberFromLoginName(String loginName) +509
   umbraco.providers.members.UmbracoMembershipProvider.CreateUser(String username, String password, String email, String passwordQuestion, String passwordAnswer, Boolean isApproved, Object providerUserKey, MembershipCreateStatus& status) +30
   System.Web.UI.WebControls.CreateUserWizard.AttemptCreateUser() +412
   System.Web.UI.WebControls.CreateUserWizard.OnNextButtonClick(WizardNavigationEventArgs e) +226
   System.Web.UI.WebControls.Wizard.OnBubbleEvent(Object source, EventArgs e) +586
   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +52
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3691

Jerry,

Your issue is separate from the original post.  The original post was about using ActiveDirectoryMembershipProvider but yours is about using Umbraco's member management.  You should create a new post so others can better find your question.

Thanks, i thought so ....it looks like catching anyinput that tag with UserName, Thank you anyway.

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