Tkinter 输入未插入数据库（sqlite3）

Question

当我在 tkinter 上单击添加时，它不会在数据库中添加任何内容 我不太了解sqlite3。

我的数据库文件：

import sqlite3
from sqlite3 import *
conn = sqlite3.connect("connects.db")
print("Opened database successfully")
cursor = conn.cursor()

def createTable():
    conn.execute('''CREATE TABLE IF NOT EXISTS contactlist
             (ID INTEGER PRIMARY KEY AUTOINCREMENT,
             NAME         TEXT    NOT NULL,
             PHONE        INT     NOT NULL);''')

    print ("Table created successfully")


cursor.close()
conn.commit()
conn.close()

Python 文件：

from tkinter import *
from tkinter import messagebox
import os
from DatabaseFile import *
import sqlite3

def selection () :
    print ("At %s of %d" % (select.curselection(), len(contactlist)))
    return int(select.curselection()[0])

def addContact() :
    conn = sqlite3.connect('connects.db')
    cursor = conn.cursor()
    entry = (nameVar.get(), phoneVar.get())
    try:
        def insertContact(entry):
            conn.execute('INSERT INTO contactlist (NAME, PHONE) VALUES (?,?)', (entry))
            conn.commit()
            print('record inserted in data')
    except:
        messagebox.showwarning("Field cannot be blank","Please enter a value in both the fields.")
    else:
        setList()


def updateContact() :
    contactlist[selection()]=[nameVar.get(), phoneVar.get()]
    setList ()

def deleteContact() :
    del contactlist[selection()]
    setList ()

def loadContact  () :
    name, phone = contactlist[selection()]
    nameVar.set(name)
    phoneVar.set(phone)

def saveContact  () :
    fobj = open("contacts.py", "w")
    fobj.write("contactlist = [")
    for items in contactlist:
        fobj.write(str(items))
        fobj.write(",")
        fobj.write("\n")
    fobj.write("]")

def exitContact  () :
    app_title = "Contacts"
    if (messagebox.askokcancel(title = app_title, \
        message = "Do you want to exit, OK or Cancel") == 1) :
        os._exit(1)

def buildFrame () :
    global nameVar, phoneVar, select
    root = Tk()
    root.title('My Contact List')

    frame1 = Frame(root)
    frame1.pack()

    Label(frame1, text="Name:").grid(row=0, column=0, sticky=W)
    nameVar = StringVar()
    name = Entry(frame1, textvariable=nameVar)
    name.grid(row=0, column=1, sticky=W)

    Label(frame1, text="Phone:").grid(row=1, column=0, sticky=W)
    phoneVar= StringVar()
    phone= Entry(frame1, textvariable=phoneVar)
    phone.grid(row=1, column=1, sticky=W)

    frame1 = Frame(root)       # add a row of buttons
    frame1.pack()
    btn1 = Button(frame1,text=" Add  ",command=addContact)
    btn2 = Button(frame1,text="Update",command=updateContact)
    btn3 = Button(frame1,text="Delete",command=deleteContact)
    btn4 = Button(frame1,text=" Load ",command=loadContact)
    btn5 = Button(frame1,text=" save ",command=saveContact)
    btn6 = Button(frame1,text=" exit ",command=exitContact)
    btn1.pack(side=LEFT); btn2.pack(side=LEFT)
    btn3.pack(side=LEFT); btn4.pack(side=LEFT)
    btn5.pack(side=LEFT); btn6.pack(side=RIGHT)

    frame1 = Frame(root)       # allow for selection of names
    frame1.pack()
    scroll = Scrollbar(frame1, orient=VERTICAL)
    select = Listbox(frame1, yscrollcommand=scroll.set, height=7)
    scroll.config (command=select.yview)
    scroll.pack(side=RIGHT, fill=Y)
    select.pack(side=LEFT,  fill=BOTH)
    return root

def setList() :
    global contacts
    contacts = readContacts()
    # sort the list
    contacts.sort(key = lambda x : x[1])
    # delete all elements from the select element
    select.delete(0, END)
    # insert each name from the list to the end of the              # select
        # element
    for id, name, phone in contacts :
        select.insert(END, name)

def readContacts():
    contactlistss = []
    cursor.execute("SELECT * FROM contactlist")
    rows = cursor.fetchall()
    for row in rows:
        contactlistss = row
    return contactlistss



# the main program
# initialize the application by building the GUI elements
root = buildFrame()
# initialize the database
createTable()
# set the contents of the list initially
setList()
to keep the program from exiting
root.mainloop()
# end of program

当点击 tkinter 上的添加按钮时，它给了我空白输出，这意味着它没有在数据库中插入任何东西

Answer 1

在try/except 中定义了def insertContact(entry):，但从不执行此函数。但是你可以直接把代码放在try/excet

try:
    conn.execute('INSERT INTO contactlist (NAME, PHONE) VALUES (?,?)', (entry))
    conn.commit()
    print('record inserted in data')
except Exceptiona as ex:
    print('Ex:', ex)
    messagebox.showwarning("Field cannot be blank","Please enter a value in both the fields.")
else:
    setList()

---

顺便说一句：我检查了所有代码并且有我的更改。并非所有工作都有效 - 即。 Update有问题。

我将所有查询移至DatabaseFile.py，并且只打开一次数据库，直到程序结束才关闭它。

我将lower_case_names 用于函数和变量。见：PEP 8 -- Style Guide for Python Code

我删除了import * - 另见PEP 8 -- Style Guide for Python Code

---

数据库文件.py

import sqlite3


conn = None # default value at start 


def open():
    global conn

    conn = sqlite3.connect("connects.db")
    print("Opened database successfully")


def close():
    if conn is not None:
        conn.close()


def create_table():
    cursor = conn.cursor()

    cursor.execute('''CREATE TABLE IF NOT EXISTS contactlist
        (ID INTEGER PRIMARY KEY AUTOINCREMENT,
         NAME         TEXT    NOT NULL,
         PHONE        INT     NOT NULL);''')

    conn.commit()

    print("Table created successfully")


def read_contacts():
    cursor = conn.cursor()

    cursor.execute("SELECT * FROM contactlist ORDER BY id")

    return cursor.fetchall()


def add_contact(name, phone):
    cursor = conn.cursor()

    cursor.execute('INSERT INTO contactlist (NAME, PHONE) VALUES (?,?)', (name, phone))

    conn.commit()

    print('record inserted in data')

---

main.py

import os
import tkinter as tk
from tkinter import messagebox
import DatabaseFile as db

def selection():
    print("At %s of %d" % (select.curselection(), len(contacts)))
    return int(select.curselection()[0])

def add_contact():
    try:
        db.add_contact(name_var.get(), phone_var.get())
    except Exception as ex:
        print('Ex:', ex)
        messagebox.showwarning("Field cannot be blank", "Please enter a value in both the fields.")
    else:
        set_list()

def update_contact():
    contacts[selection()] = [name_var.get(), phone_var.get()]
    set_list()

def delete_contact():
    del contacts[selection()]
    setList()

def load_contact():
    _, name, phone = contacts[selection()]
    name_var.set(name)
    phone_var.set(phone)

def save_contact():
    fobj = open("contacts.py", "w")
    fobj.write("contactlist = [")
    for items in contacts:
        fobj.write(str(items))
        fobj.write(",")
        fobj.write("\n")
    fobj.write("]")

def exit_contact():
    result = messagebox.askokcancel(title="Contacts", message="Do you want to exit, OK or Cancel")
    if result == 1:
        exit(1)

def build_frame():
    global name_var
    global phone_var
    global select

    root = tk.Tk()
    root.title('My Contact List')

    # ---

    frame_form = tk.Frame(root)
    frame_form.pack()

    tk.Label(frame_form, text="Name:").grid(row=0, column=0, sticky='w')

    name_var = tk.StringVar()
    name = tk.Entry(frame_form, textvariable=name_var)
    name.grid(row=0, column=1, sticky='w')

    tk.Label(frame_form, text="Phone:").grid(row=1, column=0, sticky='w')

    phone_var = tk.StringVar()
    phone = tk.Entry(frame_form, textvariable=phone_var)
    phone.grid(row=1, column=1, sticky='w')

    # ---

    frame_buttons = tk.Frame(root)
    frame_buttons.pack()

    btn1 = tk.Button(frame_buttons, text=" Add  ", command=add_contact)
    btn2 = tk.Button(frame_buttons, text="Update", command=update_contact)
    btn3 = tk.Button(frame_buttons, text="Delete", command=delete_contact)
    btn4 = tk.Button(frame_buttons, text=" Load ", command=load_contact)
    btn5 = tk.Button(frame_buttons, text=" Save ", command=save_contact)
    btn6 = tk.Button(frame_buttons, text=" Exit ", command=exit_contact)
    btn1.pack(side='left') 
    btn2.pack(side='left')
    btn3.pack(side='left') 
    btn4.pack(side='left')
    btn5.pack(side='left')
    btn6.pack(side='right')

    # ---

    frame_list = tk.Frame(root)
    frame_list.pack()

    scroll = tk.Scrollbar(frame_list, orient='vertical')
    select = tk.Listbox(frame_list, yscrollcommand=scroll.set, height=7)
    scroll.config(command=select.yview)
    scroll.pack(side='right', fill='y')
    select.pack(side='left', fill='both')

    return root

def set_list() :
    global contacts

    contacts = db.read_contacts()

    select.delete(0, 'end')

    #for item in contacts:
    #    select.insert('end', item)

    select.insert('end', *contacts) # need star *  to insert all items at once

# --- main ---

contacts = [] # default value at start

# ---

db.open() # open once before program
db.create_table()

root = build_frame()

set_list()

root.mainloop()

db.close() # close after closing program