问题描述
我有一个 Tkinter 应用程序，在该应用程序中我有一个 OptionMenu，它为我提供了位于列表 id's 中的所有 vehicleid。请注意，此列表可以变大或变小。
现在我希望我的按钮根据用户的选择将 owner 和 vehicleid 的数据发送到数据库。因此，如果我有例如 2 vehicleid's，我首先需要选择一个特定的 vehicleid，并且对于每个 vehicleid，我需要选择一个特定的 owner。
所以在 2 vehicleid 的情况下，我的数据库应该是这样的：
vehicleid owner
C161 --- Spain
C162 --- United Kingdom
应用如下所示：
这是我的代码：
owner = ['Spain','United Kingdom','Malaysia']
vehicleid = ['C161','C162']
window = Tk()
window.title("Running Python Script") # Create window
window.geometry('550x300') # Geo of the window
##These are the option menus
dd_owner = StringVar(window)
dd_owner.set(owner[0]) # the first value
w = OptionMenu(window,dd_owner,*owner)
w.grid(row=1,column=1)
dd_id = StringVar(window)
dd_id.set(vehicleid[0])
w0 = OptionMenu(window,dd_id,*vehicleid)
w0.grid(row=0,column=1)
##The run button
run_list_button =Button(window,text="Send data of ID's to database!")
run_list_button.grid(column=0,row=3)
##These are the titles
l1 = Label(window,text='Select Owner',width=15)
l1.grid(row=1,column=0)
l0 = Label(window,text='Select vehicle id:',width = 30)
l0.grid(row=0,column=0)
mainloop()
解决方法
虽然你的问题令人困惑。看了你的讨论后，我明白你想在用户确认他们的选择后才将所有数据发送到数据库。
在这种情况下，您可能需要一个字典来存储车辆 ID 和所有者 {"vehicle_id": [],"owner": []}，直到用户点击更新数据库按钮。更新数据库后，请确保清空字典，以免先前选择的项目再次插入数据库。
注意：您仍然需要多次按下另一个按钮才能将数据插入字典。可以通过控制变量的trace方法选择不带按钮
这是一个例子
from tkinter import *
import sqlite3
CREATE_QUERY = "CREATE TABLE IF NOT EXISTS vehicle(vehicle_id VARCHAR(5),owner VARCHAR(100));"
INSERT_QUERY = "INSERT INTO vehicle(vehicle_id,owner) VALUES(?,?);"
SELECT_QUERY = "SELECT * FROM vehicle;"
sql_file = "sample.db"
id_dict = {"vehicle_id": [],"owner": []}
def create_data_base():
with sqlite3.connect(sql_file) as conn:
conn.execute(CREATE_QUERY)
conn.commit()
def insert_to_db():
global id_dict
with sqlite3.connect(sql_file) as conn:
for value in zip(*id_dict.values()):
conn.execute(INSERT_QUERY,value)
conn.commit()
id_dict = {"vehicle_id": [],"owner": []} # empty the list once you insert the data
display_data()
def display_data():
with sqlite3.connect(sql_file) as conn:
curr = conn.cursor()
curr.execute(SELECT_QUERY)
items = curr.fetchall()
print(items)
def add():
id_dict["vehicle_id"].append(dd_id.get())
id_dict["owner"].append(dd_owner.get())
print(id_dict)
owner = ['Spain','United Kingdom','Malaysia']
vehicleid = ['C161','C162']
window = Tk()
window.title("Running Python Script") # Create window
window.geometry('550x300') # Geo of the window
create_data_base()
##These are the option menus
dd_owner = StringVar(window)
dd_owner.set(owner[0]) # the first value
w = OptionMenu(window,dd_owner,*owner)
w.grid(row=1,column=1)
dd_id = StringVar(window)
dd_id.set(vehicleid[0])
w0 = OptionMenu(window,dd_id,*vehicleid)
w0.grid(row=0,column=1)
Button(window,text='Add',command=add).grid(column=1,row=3)
##The run button
run_list_button =Button(window,text="Send data of ID's to database!",command=insert_to_db)
run_list_button.grid(column=0,row=3)
##These are the titles
l1 = Label(window,text='Select Owner',width=15)
l1.grid(row=1,column=0)
l0 = Label(window,text='Select vehicle id:',width = 30)
l0.grid(row=0,column=0)
window.mainloop()
以上代码会将字典中的所有数据插入到数据库中。
,首先，您应该将数据存储在某处（字典或文件..），然后在用户按下按钮时读取数据。
import mysql.connector as mysql
....
mydb = mysql.connect(host = 'localhost',user = 'root',passwd = '****.',database = 'table_data')
data = {}
def store():
if dd_id.get() not in data:
data[dd_id.get()] = dd_owner.get()
print(data)
def upload():
cur = mydb.cursor()
for item in data.items():
sql = 'INSERT INTO table_data VALUES (%s,%s)'
params = (item[0],item[1])
cur.execute(sql,params)
mydb.commit()
print('Done')
....
# The store button
Button(window,text="Store data!",command=store).grid(column=0,row=3)
# The database button
Button(window,text="Send to database",command=upload).grid(column=0,row=4)
当点击相应的按钮时，这会将数据存储在数据库中，也不允许重复条目或条目更新。