如何在 Treeview 中显示条目小部件内容

Question

我正在尝试在treeview 中显示输入到treeview 小部件中的内容，然后将其保存在sqlite3 db 中。保存到db 中的内容但不显示id、Fist name 和@987654327 treeview中的@内容。

欢迎您提出建议以实现这一目标。

from tkinter import ttk
import tkinter as tk
import sqlite3


def connect():
    conn = sqlite3.connect("TRIAL.db")
    cur = conn.cursor()
    cur.execute("CREATE TABLE IF NOT EXISTS profile(id INTEGER PRIMARY KEY, 
First TEXT, Surname TEXT)")
    conn.commit()
    conn.close()



def Insert():
    conn = sqlite3.connect("TRIAL.db")
    cur = conn.cursor()
    fr=cur.execute("INSERT INTO profile (First, Surname) VALUES(?, ?)", 
    (first_text.get(), surname_text.get()))
    conn.commit()
    for items in fr:
        tree.insert('', tk.END, values=items)

    conn.close()



connect()  #  this to create the db


root = tk.Tk()
root.geometry("400x400")

tree= ttk.Treeview(root, column=("column", "colunn1"))
tree.heading("#0", text="NUMBER")
tree.heading("#1", text="FIRST NAME")
tree.heading("#2", text="SURNAME")
tree.pack()


first_text = tk.StringVar()
e1 = tk.Entry(root, textvariable=first_text)
e1.pack()
surname_text = tk.StringVar()
e2 = tk.Entry(root, textvariable=surname_text)
e2.pack()

b1 = tk.Button(text="add data", command=Insert)
b1.pack(side=tk.BOTTOM)

root.mainloop()

Answer 1

您的代码中的问题是for items in fr 不起作用。 Python 将 fr 视为一个空的可迭代对象（在 for 循环中放置一个 print 语句，您将看到它永远不会执行）。因此，要在树视图中插入数据，您可以直接从条目中获取它并使用cur.lastrowid 检索数据库id（我在问题How to retrieve inserted id after inserting row in SQLite using Python? 的答案中找到了这个解决方案）：

from tkinter import ttk
import tkinter as tk
import sqlite3


def connect():
    conn = sqlite3.connect("TRIAL.db")
    cur = conn.cursor()
    cur.execute("CREATE TABLE IF NOT EXISTS profile(id INTEGER PRIMARY KEY, First TEXT, Surname TEXT)")
    conn.commit()
    conn.close()



def Insert():
    conn = sqlite3.connect("TRIAL.db")
    cur = conn.cursor()
    data = (first_text.get(), surname_text.get())
    # insert data in db
    cur.execute("INSERT INTO profile (First, Surname) VALUES(?, ?)", data)  
    conn.commit()
    # insert data in treeview
    tree.insert('', tk.END, text=str(cur.lastrowid), values=data)  
    conn.close()


connect()  #  this to create the db

root = tk.Tk()
root.geometry("400x400")

tree= ttk.Treeview(root, column=("column", "colunn1"))
tree.heading("#0", text="NUMBER")
tree.heading("#1", text="FIRST NAME")
tree.heading("#2", text="SURNAME")
tree.pack()


first_text = tk.StringVar()
e1 = tk.Entry(root, textvariable=first_text)
e1.pack()
surname_text = tk.StringVar()
e2 = tk.Entry(root, textvariable=surname_text)
e2.pack()

b1 = tk.Button(text="add data", command=Insert)
b1.pack(side=tk.BOTTOM)

root.mainloop()

编辑：如果您使用“#1”、“#2”、“#3”列来避免使用特殊的 列'#0'，那么你需要改变一点Insert：你需要在values而不是text中传递行ID。

from tkinter import ttk
import tkinter as tk
import sqlite3

def connect():
    conn = sqlite3.connect("TRIAL.db")
    cur = conn.cursor()
    cur.execute("CREATE TABLE IF NOT EXISTS profile(id INTEGER PRIMARY KEY, First TEXT, Surname TEXT)")
    conn.commit()
    conn.close()


def Insert():
    conn = sqlite3.connect("TRIAL.db")
    cur = conn.cursor()
    data = (first_text.get(), surname_text.get())
    # insert data in db
    cur.execute("INSERT INTO profile (First, Surname) VALUES(?, ?)", data)  
    conn.commit()
    # insert data in treeview
    tree.insert('', tk.END, values=(str(cur.lastrowid),) + data)  
    conn.close()


connect()  #  this to create the db

root = tk.Tk()
root.geometry("400x400")

tree = ttk.Treeview(root, column=("column1", "column2", "column3"), show='headings')
tree.heading("#1", text="NUMBER")
tree.heading("#2", text="FIRST NAME")
tree.heading("#3", text="SURNAME")
tree.pack()

first_text = tk.StringVar()
e1 = tk.Entry(root, textvariable=first_text)
e1.pack()
surname_text = tk.StringVar()
e2 = tk.Entry(root, textvariable=surname_text)
e2.pack()

b1 = tk.Button(text="add data", command=Insert)
b1.pack(side=tk.BOTTOM)

root.mainloop()