How to resolve Microsoft SQL Server Error 15023 "User already exists"

Microsoft SQL Server Error 15023

When you restore a database from backup to your SQL server in test environment, you will try to add Role to a restored database for user. At this time you may get the error message:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo). User, group or role 'UserName' already exists in the current database. (Microsoft SQL Server Error" 15023). (more...)

jQuery and UpdatePanel in Asp.net. How to make it work

When I created my first Asp.net web application with UpdatePanel, I wanted to use jQuery for some features. I wanted to make a button "transform", and when you click it, the text in UpdatePanel became modified via Javascript. I used jQuery framework also here. Soon I found out that it's not the simple task. (more...)


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