combox值更改时更改文本框值

Question

I have a sql database table login

id 
name(nchar 30)
password(nchar 30)
catagory(nchar 10) 

and a loginForm which have a name ComboBox which stores the names and a password TextBox which stores the password and a button login . I have retrive values from the table through databinding property of the combobox and textbox. It is showing the values but when I change the combobox value it doesn't show the password related to the combobox value? there are 3 different catagories are stored in the table student , teacher and worker I don't know the way how can I retreive catagory value from the table and open different forms mean when I press the login button the catagory is student student form will open?

how can I solve the password and catagory problem?

Answer 1

您需要在查询中处理该问题。