I have a problem I was not clear.
So we've got the form of User Data. In it there is a button that opens form of Payment. The database is not normalized and it is necessary to form the User in the form of Payment as the default data transfer User.UserID-> Payment.User, User.NameOfUser-> Payment.Paid and User.Accaunt-> Payment.AccountNumber.
The problem occurs in transfers "User.NameOfUser-> Payment.Paid"
I do not see what happens!
As I can understand, this is because the textbox is bound to a Text column in the bound table. What you assign to the DefaultValue of a TextBox must be interpreted (it could be something else than a litteral value).