在注册页面中获取错误，以通过webform TEXTBOX在SQL Server DATABASE表中插入值

hi I am trying to make a log in page as well as sign up page in asp.net using 3 tier architecture by using sql server architecture. I am able to fetch data from sql server data base which I have manually inserted during table creation in database and I am able to use it in my log in page.hi I am trying to make a log in page as well as