原理其实很简单，这段Script会把aspnet_membership表中的"m2land"用户的password和password_salt值拷贝并覆盖host对应的值。
使用方法请参考script中的说明。
/*
-- Database Utility ---------------------------------------------------------------------------
Description : Reset a Password in a DotNetNuke database
Author : Tony Tullemans
Date Created : 18.04.2007
Note/s : Before you run this script you must know the UserName and Password of another
registered DNN user in the database you wish to affect.
-----------------------------------------------------------------------------------------------
*/
DECLARE @databaseName VARCHAR(128)
SELECT @databaseName = DB_NAME()
PRINT 'RESET PASSWORD IN DATABASE : ' + @databaseName
PRINT '-----------------------------' + REPLICATE('-', DATALENGTH(@databaseName ));
DECLARE @knownUserName NVARCHAR(128)
DECLARE @lostUserName NVARCHAR(128)
DECLARE @lostUserId NVARCHAR(128)
DECLARE @knownPassword NVARCHAR(128)
DECLARE @knownSalt NVARCHAR(128)
SET @knownUserName = 'm2land'
SET @lostUserName = 'host'
SELECT @knownPassword = Password, @knownSalt = PasswordSalt
FROM aspnet_Membership
INNER JOIN aspnet_users
ON aspnet_Membership.UserId = aspnet_users.UserId
where UserName = @knownUserName;
PRINT ''
PRINT 'Known Password for "' + @knownUserName + '" is : ' + @knownPassword
PRINT 'Known Password Salt for "' + @knownUserName + '" is : ' + @knownSalt
SELECT @lostUserId = aspnet_Membership.UserId
FROM aspnet_Membership
INNER JOIN aspnet_users
ON aspnet_Membership.UserId = aspnet_users.UserId
WHERE UserName = @lostUserName;
PRINT ''
PRINT 'UserID for "' + @lostUserName + '" is : ' + @lostUserId
PRINT ''
IF (DATALENGTH(@lostUserName) <= 0 OR @lostUserName IS NULL)
PRINT 'Invalid Lost User Name ' + @lostUserName
ELSE BEGIN
IF (DATALENGTH(@knownUserName) <= 0 OR @knownUserName IS NULL)
PRINT 'Invalid Lost User Name ' + @lostUserName
ELSE BEGIN
IF (DATALENGTH(@knownPassword) <= 0 OR @knownPassword IS NULL)
PRINT 'Invalid Known Password ' + @knownPassword
ELSE BEGIN
IF (DATALENGTH(@knownSalt) <= 0 OR @knownSalt IS NULL)
PRINT 'Invalid Known Salt ' + @knownSalt
ELSE BEGIN
PRINT ''
PRINT 'BEFORE'
SELECT left(UserName, 12) as UserName, aspnet_Membership.UserId, left(Email, 20) as Email, Password, PasswordSalt
FROM aspnet_Membership INNER JOIN aspnet_users ON aspnet_Membership.UserId = aspnet_users.UserId
WHERE UserName IN ( @knownUserName, @lostUserName );
PRINT ''
PRINT 'Changing Password for User Id : "' + @lostUserId + '" to "' + @knownPassword + '"'
PRINT ''
UPDATE aspnet_Membership
SET Password = @knownPassword,
PasswordSalt = @knownSalt
-- SELECT UserId, Password, PasswordSalt
-- FROM aspnet_Membership
WHERE UserId = @lostUserId;
PRINT ''
PRINT 'AFTER'
SELECT left(UserName, 12) as UserName, aspnet_Membership.UserId, left(Email, 20) as Email, Password, PasswordSalt
FROM aspnet_Membership INNER JOIN aspnet_users ON aspnet_Membership.UserId = aspnet_users.UserId
WHERE UserName IN ( @knownUserName, @lostUserName );
END
END
END
END
GO
PRINT ''
PRINT ' * * * END OF SCRIPT * * *'
PRINT ''
GO
-- Database Utility ---------------------------------------------------------------------------
Description : Reset a Password in a DotNetNuke database
Author : Tony Tullemans
Date Created : 18.04.2007
Note/s : Before you run this script you must know the UserName and Password of another
registered DNN user in the database you wish to affect.
-----------------------------------------------------------------------------------------------
*/
DECLARE @databaseName VARCHAR(128)
SELECT @databaseName = DB_NAME()
PRINT 'RESET PASSWORD IN DATABASE : ' + @databaseName
PRINT '-----------------------------' + REPLICATE('-', DATALENGTH(@databaseName ));
DECLARE @knownUserName NVARCHAR(128)
DECLARE @lostUserName NVARCHAR(128)
DECLARE @lostUserId NVARCHAR(128)
DECLARE @knownPassword NVARCHAR(128)
DECLARE @knownSalt NVARCHAR(128)
SET @knownUserName = 'm2land'
SET @lostUserName = 'host'
SELECT @knownPassword = Password, @knownSalt = PasswordSalt
FROM aspnet_Membership
INNER JOIN aspnet_users
ON aspnet_Membership.UserId = aspnet_users.UserId
where UserName = @knownUserName;
PRINT ''
PRINT 'Known Password for "' + @knownUserName + '" is : ' + @knownPassword
PRINT 'Known Password Salt for "' + @knownUserName + '" is : ' + @knownSalt
SELECT @lostUserId = aspnet_Membership.UserId
FROM aspnet_Membership
INNER JOIN aspnet_users
ON aspnet_Membership.UserId = aspnet_users.UserId
WHERE UserName = @lostUserName;
PRINT ''
PRINT 'UserID for "' + @lostUserName + '" is : ' + @lostUserId
PRINT ''
IF (DATALENGTH(@lostUserName) <= 0 OR @lostUserName IS NULL)
PRINT 'Invalid Lost User Name ' + @lostUserName
ELSE BEGIN
IF (DATALENGTH(@knownUserName) <= 0 OR @knownUserName IS NULL)
PRINT 'Invalid Lost User Name ' + @lostUserName
ELSE BEGIN
IF (DATALENGTH(@knownPassword) <= 0 OR @knownPassword IS NULL)
PRINT 'Invalid Known Password ' + @knownPassword
ELSE BEGIN
IF (DATALENGTH(@knownSalt) <= 0 OR @knownSalt IS NULL)
PRINT 'Invalid Known Salt ' + @knownSalt
ELSE BEGIN
PRINT ''
PRINT 'BEFORE'
SELECT left(UserName, 12) as UserName, aspnet_Membership.UserId, left(Email, 20) as Email, Password, PasswordSalt
FROM aspnet_Membership INNER JOIN aspnet_users ON aspnet_Membership.UserId = aspnet_users.UserId
WHERE UserName IN ( @knownUserName, @lostUserName );
PRINT ''
PRINT 'Changing Password for User Id : "' + @lostUserId + '" to "' + @knownPassword + '"'
PRINT ''
UPDATE aspnet_Membership
SET Password = @knownPassword,
PasswordSalt = @knownSalt
-- SELECT UserId, Password, PasswordSalt
-- FROM aspnet_Membership
WHERE UserId = @lostUserId;
PRINT ''
PRINT 'AFTER'
SELECT left(UserName, 12) as UserName, aspnet_Membership.UserId, left(Email, 20) as Email, Password, PasswordSalt
FROM aspnet_Membership INNER JOIN aspnet_users ON aspnet_Membership.UserId = aspnet_users.UserId
WHERE UserName IN ( @knownUserName, @lostUserName );
END
END
END
END
GO
PRINT ''
PRINT ' * * * END OF SCRIPT * * *'
PRINT ''
GO
附：还有一个版本的Script,这个版本是直接调用Asp.net的存储过程来修改密码，在我看来更方便，但不知为什么不起作用，望赐教！
另一个方法：
As there are frequent requests from users, who lost the password of the host account (and you cannot request the host password by email), the following solution will help for all DNN 3 and 4 installation. Please note, that your need direct access to the database to suceed with the issue:
- if "register" is not displayed for the portal, go to table "Portals" in your database and enter value "2" into column "Registration".
- create a new user account by registration (this time, please remember the password you enter!)
- go to database, enter table "ASPNet_Membership"
- go to new user account (usually the last one) and copy the encrypted values of columns "Password" and "PasswordSalt" into the same columns of user account "host" (usually th first entry in this table)
- login as user "host" using the new password and delete the reshly created other user.
- Keep remembering your password ;)