登录成功后，Python，Tkinter，SQlite3将用户重定向到新窗口

Question

我是编程中的新手，我创建了以下源代码来验证用户是否成功登录。 我想在用户输入条目中的正确凭据后，将用户重定向到新窗口并摆脱当前窗口。 是否可以使用顶级方法？

def Is_Valid():

    UsernameValidity=UserName_Entry.get()        
    PasswordValidity=Password_Entry.get()
    cursor.execute('''SELECT password FROM users WHERE username = ?''', (UsernameValidity,))
    cursor.execute('''SELECT username FROM users WHERE password = ?''', (PasswordValidity,))
    LogInAttempt = cursor.fetchone()?
    print (Is_Valid) # Testing 
    if LogInAttempt:
        print (" One of the accounts have successfully logged in ")
        IsValidText.config(text=" You have logged in! ", fg="black", highlightthickness=1)
    else:?
        print (" One of the accounts inputted the wrong credentials! ")
        IsValidText.config(text=" Invalid username or Password! ", fg="black", highlightthickness=1)

Answer 1

假设您的程序在这一点上完美运行，欢迎您使用Toplevel方法。 我还将包含.after()以给予时间让用户看到消息。

def NewPage():
    global NewRoot
    root.withdraw() # hide (close) the root/Tk window
    NewRoot = tk.Toplevel(root)
    # use the NewRoot as the root now

def Is_Valid():
    # same as before...
    if LogInAttempt:
        print (" One of the accounts have successfully logged in ")
        IsValidText.config(text=" You have logged in! ", fg="black", highlightthickness=1)
        root.after(2000, NewPage) # or whatever your Tk is called
        # redirect to the NewPage function after 2 seconds 
    else:
        print (" One of the accounts inputted the wrong credentials! ")
        IsValidText.config(text=" Invalid username or Password! ", fg="black", highlightthickness=1)

这将关闭原始窗口并弹出一个新的空白窗口。 注意： .after(ms, callback)使用ms，所以2000ms = 2sec

你可能想要在cursor.fetchone()和else之后摆脱两个随机问号。