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Running external Application in an IFrame causes DotNetNuke to stop allowing users to log in
Last Post 13 Jul 2011 08:17 AM by admin. 7 Replies.
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Michael WashingtonUser is Offline
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30 May 2011 04:40 PM
    If you follow the example described here:

    http://lightswitchhelpwebsite.com/B...yment.aspx


    Everything will work just fone for about 5 minutes. then you will find that users cannot log into the DotNetNuke website anymore.

    The reason is that when they log in, the DotNetNuke core stored procedure, UpdateUser, gets stuck in a loop until it times out.

    When I reproduce this on my test machine, I can go into SQL Enterprise Manager and the following query will run until you stop it:

    exec dbo.UpdateUser @UserID=2,@PortalID=0,@FirstName=N'Administrator',@LastName=N'Account',@Email=N'Webmaster@ADefwebserver.com',@DisplayName=N'Administrator Account',@UpdatePassword=0,@Authorised=1,@RefreshRoles=0,@LastIPAddress=N'::1',@IsDeleted=0,@LastModifiedByUserID=-1

    The question of course is why? I can only suspsct it is that perhaps something odd is happening because the MachineKey was copied into the remote site and some bad parameters are now being passed to the stored procedure?

    I am trying to investigate this, but any ideas are appreciated!
    -----------
    Michael Washington
    http://LightSwitchHelpWebsite.com
    Michael WashingtonUser is Offline
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    30 May 2011 04:55 PM
    First update. It's not the paramteters passed to the stored procedure. I have another DotNetNuke website where I am the Admin Account and User 2. When I log in, the "UpdateUser" stored procedure in that site is run with the exact same parameters and it runs fine.



    Now I am looking "inside" the stored procedure...



    ALTER PROCEDURE [dbo].[UpdateUser]

    @UserID int,

    @PortalID int,

    @FirstName nvarchar(50),

    @LastName nvarchar(50),

    @Email nvarchar(256),

    @DisplayName nvarchar(100),

    @UpdatePassword bit,

    @Authorised bit,

    @RefreshRoles bit,

    @LastIPAddress nvarchar(50),

    @IsDeleted bit,

    @LastModifiedByUserID int

    AS

    UPDATE dbo.Users

    SET

    FirstName = @FirstName,

    LastName = @LastName,

    Email = @Email,

    DisplayName = @DisplayName,

    UpdatePassword = @UpdatePassword,

    LastIPAddress = @LastIPAddress,

    LastModifiedByUserID = @LastModifiedByUserID,

    LastModifiedOnDate = getdate()

    WHERE UserId = @UserID



    IF @PortalID IS NULL

    BEGIN

    UPDATE dbo.Users

    SET

    IsDeleted = @IsDeleted

    WHERE UserId = @UserID

    END

    ELSE

    BEGIN

    UPDATE dbo.UserPortals

    SET

    Authorised = @Authorised,

    RefreshRoles = @RefreshRoles,

    IsDeleted = @IsDeleted

    WHERE UserId = @UserID

    AND PortalId = @PortalID

    END
    -----------
    Michael Washington
    http://LightSwitchHelpWebsite.com
    Michael WashingtonUser is Offline
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    30 May 2011 05:13 PM
    This query (this is the first part of the "UpdateUser" stored procedure) simply will not complete when I try to run it in SQL Enterprise manager:

    DECLARE @RC int
    DECLARE @UserID int
    DECLARE @PortalID int
    DECLARE @FirstName nvarchar(50)
    DECLARE @LastName nvarchar(50)
    DECLARE @Email nvarchar(256)
    DECLARE @DisplayName nvarchar(100)
    DECLARE @UpdatePassword bit
    DECLARE @Authorised bit
    DECLARE @RefreshRoles bit
    DECLARE @LastIPAddress nvarchar(50)
    DECLARE @IsDeleted bit
    DECLARE @LastModifiedByUserID int

    -- TODO: Set parameter values here.
    Set @UserID=2
    Set @PortalID=0
    Set @FirstName=N'Administrator'
    Set @LastName=N'Account'
    Set @Email=N'Webmaster@ADefwebserver.com'
    Set @DisplayName=N'Administrator Account'
    Set @UpdatePassword=0
    Set @Authorised=1
    Set @RefreshRoles=0
    Set @LastIPAddress=N'::1'
    Set @IsDeleted=0
    Set @LastModifiedByUserID=-1

    UPDATE dbo.Users
    SET
    FirstName = @FirstName,
    LastName = @LastName,
    Email = @Email,
    DisplayName = @DisplayName,
    UpdatePassword = @UpdatePassword,
    LastIPAddress = @LastIPAddress,
    LastModifiedByUserID = @LastModifiedByUserID,
    LastModifiedOnDate = getdate()
    WHERE UserId = @UserID


    What could cause this? I have to stop and re-start SQL Server to get everything back to normal
    -----------
    Michael Washington
    http://LightSwitchHelpWebsite.com
    Michael WashingtonUser is Offline
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    30 May 2011 05:24 PM
    Ok the Users table is simply locked when this happens. It is nothing special about the "UpdateUser" stored procedure. Also it is only the "Admin" record in the User table. I can edit any other row but that one.

    So the question is now, what is locking that row in the users table?
    -----------
    Michael Washington
    http://LightSwitchHelpWebsite.com
    Michael WashingtonUser is Offline
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    30 May 2011 07:55 PM
    Ok it appears I have tracked this down.

    I needed to determine if the current user is an Administrator or not in my external LightSwitch application. the problem is LightSwitch places locks on tables when you connect to external data sources.

    So when I connected to the DotNetNuke Users table, LightSwitch locks the rows it is using. Locking the DotNetNuke Users table is a no no. The thing that sucks is I also get this even if I am using a View (like vw_UserRoles)

    I can use others methods such as a web service to get the information I need.

    The good news is that this is only related to connecting to DotNetNuke as an external datasource NOT related to running LightSwitch in an IFrame with DotNetNuke.
    -----------
    Michael Washington
    http://LightSwitchHelpWebsite.com
    Michael WashingtonUser is Offline
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    04 Jun 2011 08:28 AM
    A final note on this. The answer is to use a WCF RIA Dataservice. This is what I am using in the Things For Sale example at: http://lightswitchhelpwebsite.com/D...rSale.aspx
    -----------
    Michael Washington
    http://LightSwitchHelpWebsite.com
    SpartanUser is Offline
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    13 Jul 2011 08:08 AM
    One question I had is...how do you get your site to run so fast with DNN?  Is there any special configuration/hosting that you use?
    Michael WashingtonUser is Offline
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    13 Jul 2011 08:17 AM
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    Michael Washington
    http://LightSwitchHelpWebsite.com
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