添加到数据库并在多列表框中显示

Question

大家好，我正在尝试制作一个应用程序，该应用程序从一些 tkinter 输入框中获取数据，并将它们添加到数据库中，并将它们显示在 tktreectrl 的多列表框中。我尝试用来向数据库添加内容的代码是基于各种在线教程，但是所做的只是在数据库的最后一列中添加一个 0。即使我使用 DB Browser 将值放入数据库，它们仍然不会显示在多列表框中。 （这里是完整代码）

#Import Modules
import tkinter
import TkTreectrl
import sqlite3
#Database
db = sqlite3.connect("marks.db")
cursor=db.cursor()
print("Opened Database")
db.execute("CREATE TABLE IF NOT EXISTS marks (Firstname, Surname, Mark)")
print("Table created")
#Variables
Surname = str()
Firstname = str()
Mark = int()
#Define Buttons
def addentry() :
   db.execute('INSERT INTO marks VALUES (?,?,?);', (Firstname,Surname,Mark))
   db.commit()
   print ("Entry Added To Database")

def deleteentry() :
   selected=listbox.get(ACTIVE)
   name=selected[0]
   db.execute('DELETE FROM marks where Firstname =?', (name))
   print ("Entry Deleted")
#Window
window = tkinter.Tk()
window.title("marks")
window.geometry("875x500")
#Labels
lbl_surname = tkinter.Label(window, text="Surname:", font="Arial 12 bold")
lbl_first = tkinter.Label(window, text="First-Name:", font="Arial 12 bold")
lbl_mark = tkinter.Label(window, text="Mark (Percentage):", font="Arial 12 bold")
#Entry
txt_surname = tkinter.Entry(window, textvariable=Surname)
txt_first = tkinter.Entry(window, textvariable=Firstname)
txt_mark = tkinter.Entry(window, textvariable=Mark)
#Button
but_save = tkinter.Button(window, text="Save", command= addentry, width=10)
but_delete = tkinter.Button(window, text="Delete", command=deleteentry, width=10)
#List
listbox = TkTreectrl.MultiListbox(window)
listbox.config(columns=('Firstname', 'Surname', ' Mark'))
cursor.execute('SELECT * from marks')
for row in cursor.fetchall():
    listbox.insert('end',*map(unicode,row))
#Grid
lbl_surname.grid(row=0, column=1, padx=100)
lbl_first.grid(row=0, column=0)
lbl_mark.grid(row=0, column=2)
txt_surname.grid(row=1, column=1, padx=110)
txt_first.grid(row=1, column=0, padx=10)
txt_mark.grid(row=1, column=2)
but_save.grid(row=0, column=3)
but_delete.grid(row=1, column=3)
listbox.grid(row=2)
#Render
window.mainloop()

任何想法 关于我做错了什么

谢谢克里斯

Answer 1

你用错了textvariable。该值需要是一个特殊的 Tkinter 变量，例如 StringVar。第二个是你必须对这些变量使用get 方法来获取值。例如：

firstNameVar = tkinter.StringVar()
...
txt_first = tkinter.Entry(..., textvariable=firstNameVar)
...
Firstname = firstNameVar.get()
...