当我在 tkinter 的 Combobox 小部件中添加的 Entry 小部件中输入文本时，有什么办法吗？

Question

当我在客户表中添加或编辑客户时，它不会出现在销售表的客户字段中，因此我必须销毁窗口并手动或使用刷新按钮再次打开它。 刷新按钮也可以工作 1 次，这意味着当我在客户表中添加或编辑另一个客户时，然后单击刷新按钮只是窗口销毁。 如何在没有刷新按钮的情况下解决此问题意味着当我在客户表中添加或编辑客户时，会立即出现在销售表的客户字段中？

我在条目小部件中添加了一个客户名称，但它没有出现在组合框中

widget of tkinter. 
from tkinter import *
from tkinter import ttk
from tkinter import messagebox
import mysql.connector


root = Tk()
root.title('Car Store')
root.geometry('1600x860')

# Customer Functions
def update(rows):
    trv.delete(*trv.get_children())
    for dt in rows:
        trv.insert('', 'end', values=dt)


def get_row(event):
    item = trv.item(trv.focus())
    id_var.set(item['values'][0])
    name_var.set(item['values'][1])
    f_name_var.set(item['values'][2])
    last_name_var.set(item['values'][3])
    tazkera_no_var.set(item['values'][4])
    address_var.set(item['values'][5])
    mobile_no_var.set(item['values'][6])


def clean_data_list():
    ent_id.delete(0, END)
    ent_name.delete(0, END)
    ent_f_name.delete(0, END)
    ent_last_name.delete(0, END)
    ent_tazkera_no.delete(0, END)
    ent_address.delete(0, END)
    ent_mobile_no.delete(0, END)


def add_customer():
    if ent_name.get() == '':
        messagebox.showerror('Error!', 'Customer Name Field is required')
    else:
        con = mysql.connector.connect(user='nesarahmad',
                                      password='1114WE',
                                      host='127.0.0.1',
                                      database='carstore')
        my_cursor = con.cursor()

        query = 'USE carstore'
        my_cursor.execute(query)

        query = 'SELECT * FROM customer WHERE tazkera_num = %s'
        my_cursor.execute(query, (tazkera_no_var.get(),))
        row = my_cursor.fetchone()

        if row != None:
            messagebox.showerror(
                'Error!', 'Tazkera Number is Already exists, Try Another Tazkera Number')
        else:
            query = "INSERT INTO customer VALUES(%s, %s, %s, %s, %s, %s, %s)"
            values = ('null', name_var.get(), f_name_var.get(), last_name_var.get(
            ), tazkera_no_var.get(), address_var.get(), mobile_no_var.get())

            my_cursor.execute(query, values)
            con.commit()
            clear()
            con.close()
            clean_data_list()


def edit_customer():
    if messagebox.askyesno('Confirm Edit?', 'Are you shure you want to Edit this Customer'):
        con = mysql.connector.connect(user='nesarahmad',
                                      password='1114WE',
                                      host='127.0.0.1',
                                      database='carstore')
        my_cursor = con.cursor()

        customer_id = id_var.get()
        query = "UPDATE customer SET name=%s, f_name=%s, last_name=%s, tazkera_num=%s, address=%s, mobile_num=%s WHERE id=" + customer_id
        values = (name_var.get(), f_name_var.get(), last_name_var.get(
        ), tazkera_no_var.get(), address_var.get(), mobile_no_var.get())
        my_cursor.execute(query, values)
        con.commit()
        clear()
        con.close()
        clean_data_list()
    else:
        return True


# Sales Functions
def update_sales_list(rows):
    trv_sales.delete(*trv_sales.get_children())
    for dt in rows:
        trv_sales.insert('', 'end', values=dt)


def sales_get_row(event):
    item = trv_sales.item(trv_sales.focus())
    id_var_sales.set(item['values'][0])
    cb_car_id.set(str(item['values'][1]) + '-' + item['values'][3])
    cb_customer_id.set(str(item['values'][2]) + '-' + item['values'][4])
    qty_var_sales.set(item['values'][5])
    sales_price_var_sales.set(item['values'][6])


def sales_clean_data_list():
    ent_id_sales.delete(0, END)
    cb_car_id_sales.set('')
    cb_customer_id_sales.set('')
    ent_qty_sales.delete(0, END)
    ent_sales_price_sales.delete(0, END)


def add_sales():
    if cb_car_id_sales.get() == '' or cb_customer_id_sales.get() == '' or ent_qty_sales.get() == '' or ent_sales_price_sales.get() == '':
        messagebox.showerror('Error!', 'All Fields are required')
    elif int(ent_qty_sales.get()) < 1 or int(ent_qty_sales.get()) > 1:
        messagebox.showerror('Error!', 'QTY must be 1')
    else:

        con = mysql.connector.connect(user='nesarahmad',
                                      password='1114WE',
                                      host='127.0.0.1',
                                      database='carstore')
        my_cursor = con.cursor()

        query = 'USE carstore'
        my_cursor.execute(query)

        query = "SELECT * FROM sales WHERE car_id = %s"
        my_cursor.execute(query, (cb_car_id.get().split('-')[0],))
        car_id = my_cursor.fetchone()
        if car_id != None:
            messagebox.showerror(
                'Error!', 'This car already solde, try another car')
        else:
            query = "SELECT COUNT(QTY) FROM car_inventory WHERE car_id = %s"
            my_cursor.execute(query, (cb_car_id.get().split('-')[0],))

            qty_car_inventory_check = my_cursor.fetchone()
            # print(qty_car_inventory_check)
            if qty_car_inventory_check[0] == 1:
                query = "INSERT INTO  sales VALUES(%s, %s, %s, %s, %s)"
                values = (
                    'null',
                    cb_car_id.get().split('-')[0],
                    cb_customer_id.get().split('-')[0],
                    qty_var_sales.get(),
                    sales_price_var_sales.get()
                )

                my_cursor.execute(query, values)

                # Update the QTY in Car Inventory
                query = "UPDATE car_inventory SET QTY = QTY - 1 WHERE car_id = %s"
                my_cursor.execute(query, (cb_car_id.get().split('-')[0],))

                con.commit()

                clear_sales()
                clear_car_inventory()
                con.close()
                sales_clean_data_list()
            else:
                messagebox.showerror(
                    '!Errot', 'There is no This Car in Car Inventory, Chose the Other Car')


def edit_sales():
    if messagebox.askyesno('Confirm Edit?', 'Are you shure you want to Edit this Sales'):
        if ent_qty_sales.get() == '' or ent_sales_price_sales.get() == '':
            messagebox.showerror('Error!', 'All Fields are required')
        elif int(ent_qty_sales.get()) < 1 or int(ent_qty_sales.get()) > 1:
            messagebox.showerror('Error!', 'QTY must be 1')
        else:
            con = mysql.connector.connect(user='nesarahmad',
                                          password='1114WE',
                                          host='127.0.0.1',
                                          database='carstore')
            my_cursor = con.cursor()

            id_sales = id_var_sales.get()
            query = "UPDATE sales SET car_id=%s, customer_id=%s, QTY=%s, sales_price=%s WHERE id=" + id_sales
            values = (
                cb_car_id.get(),
                cb_customer_id.get(),
                qty_var_sales.get(),
                sales_price_var_sales.get(),
            )

            my_cursor.execute(query, values)
            con.commit()
            clear_sales()
            con.close()
            sales_clean_data_list()
    else:
        return True


def refresh():
    root.destroy()
    
    import CARSTORE


nb = ttk.Notebook(root)

frm_customer = Frame(nb, bg='firebrick1')

frm_wrapper1 = LabelFrame(frm_customer, text='Cusotmer List', pady=30)
frm_wrapper1.pack(fill='both', expand='yes', padx=40, pady=10)

frm_wrapper3 = LabelFrame(frm_customer, text='Customer Data', pady=30)
frm_wrapper3.pack(fill='both', expand='yes', padx=40, pady=(10, 50))

trv = ttk.Treeview(frm_wrapper1, selectmode='browse', columns=(
    1, 2, 3, 4, 5, 6, 7), show='headings')
trv.pack()

trv.heading(1, text='Customer ID')
trv.heading(2, text='Name')
trv.heading(3, text="Fateher's Name")
trv.heading(4, text='Last Name')
trv.heading(5, text='Tazkera no')
trv.heading(6, text='Address')
trv.heading(7, text='Mobile no')

# Hide Customer ID column
trv.column(1, stretch=NO, minwidth=0, width=0)

trv.bind('<Double 1>', get_row)

con = mysql.connector.connect(user='nesarahmad',
                              password='1114WE',
                              host='127.0.0.1',
                              database='carstore')
my_cursor = con.cursor()

query = 'USE carstore'
my_cursor.execute(query)

try:
    query = 'create table customer(id int auto_increment primary key, name varchar(50) not null, f_name varchar(50), last_name varchar(50), tazkera_num varchar(50) unique, address varchar(200), mobile_num varchar(13))'
    my_cursor.execute(query)
except:
    print('Same Tabel(s) exist.')

query = 'SELECT * FROM customer'
my_cursor.execute(query)
rows = my_cursor.fetchall()
update(rows)
con.close()


# Customer Data section
id_var = StringVar()
name_var = StringVar()
f_name_var = StringVar()
last_name_var = StringVar()
tazkera_no_var = StringVar()
address_var = StringVar()
mobile_no_var = StringVar()

lbl_id = Label(frm_wrapper3, text='Cutomer ID')
lbl_id.grid(row=0, column=0, sticky='w')
ent_id = Entry(frm_wrapper3, textvariable=id_var)
ent_id.grid(row=0, column=1)

# Hide the following 2 Label and Entry
lbl_id.grid_forget()
ent_id.grid_forget()

lbl_name = Label(frm_wrapper3, text='Name')
lbl_name.grid(row=1, column=0, sticky='w')
ent_name = Entry(frm_wrapper3, textvariable=name_var)
ent_name.grid(row=1, column=1)

lbl_f_name = Label(frm_wrapper3, text="Father's Name")
lbl_f_name.grid(row=2, column=0, sticky='w')
ent_f_name = Entry(frm_wrapper3, textvariable=f_name_var)
ent_f_name.grid(row=2, column=1)

lbl_last_name = Label(frm_wrapper3, text="Last Name")
lbl_last_name.grid(row=3, column=0, sticky='w')
ent_last_name = Entry(frm_wrapper3, textvariable=last_name_var)
ent_last_name.grid(row=3, column=1)

lbl_tazkera_no = Label(frm_wrapper3, text="Tazkera no")
lbl_tazkera_no.grid(row=4, column=0, sticky='w')
ent_tazkera_no = Entry(frm_wrapper3, textvariable=tazkera_no_var)
ent_tazkera_no.grid(row=4, column=1)

lbl_address = Label(frm_wrapper3, text="Address")
lbl_address.grid(row=5, column=0, sticky='w')
ent_address = Entry(frm_wrapper3, textvariable=address_var)
ent_address.grid(row=5, column=1)

lbl_mobile_no = Label(frm_wrapper3, text="Mobile no")
lbl_mobile_no.grid(row=6, column=0, sticky='w')
ent_mobile_no = Entry(frm_wrapper3, textvariable=mobile_no_var)
ent_mobile_no.grid(row=6, column=1)

btn_add_customer = Button(
    frm_wrapper3, text='Add Customer', width=15, bg='green', fg='white', activebackground='green', activeforeground='white', command=add_customer)
btn_add_customer.grid(row=7, column=0, pady=30)

btn_edit_customer = Button(
    frm_wrapper3, text='Edit Customer', width=15, bg='blue', fg='white', activebackground='blue', activeforeground='white', command=edit_customer)
btn_edit_customer.grid(row=7, column=1, pady=30)

frm_customer.pack(fill='both', expand='yes')
# End of Customer section


# Sales Section
frm_sales = Frame(nb, bg='firebrick1')

frm_sales_list = LabelFrame(
    frm_sales, text='Sales List', pady=30)
frm_sales_list.pack(fill='both', expand='yes', padx=40, pady=10)

frm_sales_data = LabelFrame(
    frm_sales, text='Sales Data', pady=30)
frm_sales_data.pack(fill='both', expand='yes', padx=40, pady=(10, 50))

trv_sales = ttk.Treeview(frm_sales_list, selectmode='browse', columns=(
    1, 2, 3, 4, 5, 6, 7), show='headings')
trv_sales.pack()

trv_sales.heading(1, text='Sales ID')
trv_sales.heading(2, text='Car ID')
trv_sales.heading(3, text="Customer ID")
trv_sales.heading(4, text="Car")
trv_sales.heading(5, text="Customer")
trv_sales.heading(6, text='QTY')
trv_sales.heading(7, text='Sales Price')

# Hide Sales ID, Car ID and Customer ID columns
trv_sales.column(1, stretch=NO, minwidth=0, width=0)
trv_sales.column(2, stretch=NO, minwidth=0, width=0)
trv_sales.column(3, stretch=NO, minwidth=0, width=0)
trv_sales.column(4, stretch=NO, minwidth=0, width=0)

trv_sales.bind('<Double 1>', sales_get_row)

con = mysql.connector.connect(user='nesarahmad',
                              password='1114WE',
                              host='127.0.0.1',
                              database='carstore')
my_cursor = con.cursor()

query = 'USE carstore'
my_cursor.execute(query)

try:
    query = 'CREATE TABLE sales(id int auto_increment primary key, car_id int NOT NULL UNIQUE, customer_id int, QTY int NOT NULL, sales_price decimal NOT NULL, FOREIGN KEY (car_id) REFERENCES car_inventory(car_id) ON DELETE CASCADE ON UPDATE CASCADE, FOREIGN KEY (customer_id) REFERENCES customer(id) ON DELETE CASCADE ON UPDATE CASCADE)'
    my_cursor.execute(query)
except:
    print('Same Tabel(s) exist.')

query = 'SELECT sales.id, car_inventory.car_id, customer.id, car_inventory.car_name, customer.name, sales.QTY, sales.sales_price FROM sales JOIN car_inventory ON car_inventory.car_id = sales.car_id JOIN customer ON customer.id = sales.customer_id'
my_cursor.execute(query)

rows = my_cursor.fetchall()

update_sales_list(rows)
con.close()


# Sales Data section
id_var_sales = StringVar()
cb_car_id = StringVar()
cb_customer_id = StringVar()
qty_var_sales = StringVar()
sales_price_var_sales = StringVar()

con = mysql.connector.connect(user='nesarahmad',
                              password='1114WE',
                              host='127.0.0.1',
                              database='carstore')
my_cursor = con.cursor()

customer_options_sales = []
query = 'SELECT id, name FROM customer'
my_cursor.execute(query)

customer_ids_names = my_cursor.fetchall()
for id_name in customer_ids_names:
    customer_options_sales.append(str(id_name[0]) + '-' + id_name[1])

lbl_id_sales = Label(frm_sales_data, text='Sales ID')
lbl_id_sales.grid(row=0, column=0, sticky='w')
ent_id_sales = Entry(
    frm_sales_data, textvariable=id_var_sales)
ent_id_sales.grid(row=0, column=1)

# Hide the following 2 Label and Entry
lbl_id_sales.grid_forget()
ent_id_sales.grid_forget()

lbl_customer_id_sales = Label(frm_sales_data, text='Customer')
lbl_customer_id_sales.grid(row=2, column=0, sticky='w')
cb_customer_id_sales = ttk.Combobox(
    frm_sales_data, textvariable=cb_customer_id, state='readonly', width=17)
cb_customer_id_sales.grid(row=2, column=1)
cb_customer_id_sales['values'] = customer_options_sales

lbl_qty_sales = Label(frm_sales_data, text='QTY')
lbl_qty_sales.grid(row=3, column=0, sticky='w')
ent_qty_sales = Entry(
    frm_sales_data, textvariable=qty_var_sales)
ent_qty_sales.grid(row=3, column=1)

lbl_sales_price_sales = Label(frm_sales_data, text='Sales Price')
lbl_sales_price_sales.grid(row=4, column=0, sticky='w')
ent_sales_price_sales = Entry(
    frm_sales_data, textvariable=sales_price_var_sales)
ent_sales_price_sales.grid(row=4, column=1)

btn_add_sales = Button(
    frm_sales_data, text='Add ', width=15, bg='green', fg='white', activebackground='green', activeforeground='white', command=add_sales)
btn_add_sales.grid(row=5, column=0, pady=30)

btn_edit_sales = Button(
    frm_sales_data, text='Edit', width=15, bg='blue', fg='white', activebackground='blue', activeforeground='white', command=edit_sales)
btn_edit_sales.grid(row=5, column=1, pady=30)

btn_refresh_sales = Button(
    frm_sales_data, text='Refresh', width=15, bg='orange', fg='white', activebackground='orange', activeforeground='white', command=refresh)
btn_refresh_sales.grid(row=5, column=3, pady=30)

frm_sales.pack(fill='both', expand='yes')
# End of Sales Section

nb.pack(fill=BOTH, expand=True)

nb.add(frm_customer, text='Customer')
nb.add(frm_sales, text='Sales')


root.mainloop()

Answer 1

我没有进一步研究您的代码，因为它不可重现且不完整。您可以通过将回调绑定到您的条目小部件（例如，当点击 Return 时）来实现您想要的，并且在该回调中，您首先获取组合框的当前值，将条目中的文本添加到该列表（= 元组）然后用新创建的元组覆盖组合框的值。一个最小的示例如下所示：

from tkinter import Tk
from tkinter.ttk import Entry, Combobox

root = Tk()


def add_to_combobox(event):

    # replace values with new tuple from current values and text from entry
    my_combobox["values"] = my_combobox["values"] + (my_entry.get(), )

    # optional: select last item in combobox
    my_combobox.current(len(my_combobox["values"])-1)


my_entry = Entry(root)
my_entry.bind("<Return>", add_to_combobox)  # binds callback to widget when hitting return
my_entry.pack()

my_combobox = Combobox(root)
my_combobox.pack()
my_combobox["values"] = ("First default value", "Second default value")
my_combobox.config(state="readonly")
my_combobox.current(0)

root.mainloop()

Answer 2

首先添加一个类似 cb_update_cus() 的函数，然后在 con.commit() 之后的 add_customer 函数中调用它

def cb_update_cus():
    con = mysql.connector.connect(user='nesarahmad',
                                  password='1114WE',
                                  host='127.0.0.1',
                                  database='carstore')
    my_cursor = con.cursor()
    customer_options_sales = []
    query = 'SELECT id, name FROM customer'
    my_cursor.execute(query)

    customer_ids_names = my_cursor.fetchall()
    for id_name in customer_ids_names:
        customer_options_sales.append(str(id_name[0]) + '-' + id_name[1])

    cb_customer_id_sales['values'] = customer_options_sales