如何从Tkinter中的Treeview小部件获取所有行信息

如何解决如何从Tkinter中的Treeview小部件获取所有行信息

我想为按钮编写一个命令，该命令将从Treeview小部件中所有行（标题行除外）中获取所有信息，然后将其粘贴到标签或列表框上。我不知道如何引用此小部件的行以从中传递信息，特别是因为我的小部件可以具有任意数量的行，具体取决于该客户的发票。任何帮助将不胜感激。

import datetime as dt
import sqlite3
from tkinter import *
from tkinter import ttk


date = dt.datetime.now()
format_date = f"{date:%a,%b %d %Y}"

f1 = Tk()
f1.title("THE HAT COMPANY")
f1.geometry("750x500")
Invoice_Maker = LabelFrame(f1,text = "Invoice")
Invoice_Maker.grid(row=8,column=0,columnspan=4)
Qty_Label = Label(Invoice_Maker,text = "        Qty:")
Qty_Label.grid(row=0,column=0)
Quantity_Box = Entry(Invoice_Maker,width=15)
Quantity_Box.grid(row=0,column=1)
clicked = StringVar()
clicked.set("Select Item")
Dropdown = OptionMenu(Invoice_Maker,clicked,"Bandana","Du-Rag/Stocking cap","Winter Hats","Gloves","A-shirt","Belt","Capdana","Mask","Sleeve","T-shirt RoundNeck","T-shirt V-Neck","T-shirt LongSleeve","Japanese Hat","Sunglass","Small Straw Hat","Cap","Bucket Hat","Safari Hat","Large Straw Hat","Banded Straw Hat","Neon T-Shirt","Panama Jack","Lady Hats","Fedora","Straw Hat Ranchero","Team Hats","Speedy Hat","Misc","Bike Tires","Machetes","Balones")
Dropdown.grid(row=0,column=2)
Style_Label = Label(Invoice_Maker,text = "Style:")
Style_Label.grid(row = 0,column = 3)
StyleMenu = StringVar()
StyleMenu.set("N/A")
Style = OptionMenu(Invoice_Maker,StyleMenu,"Plain","Camo","Neon")
Style.grid(row=0,column=4)
Cost_Label = Label(Invoice_Maker,text  = "Cost:")
Cost_Label.grid(row=0,column=5)
Cost = Entry(Invoice_Maker,width=7)
Cost.grid(row=0,column=6)
Retail_Label = Label(Invoice_Maker,text  = "Retail:")
Retail_Label.grid(row=0,column=7)
Retail = Entry(Invoice_Maker,width=7)
Retail.grid(row=0,column=8)
Inv_Frame = LabelFrame(Invoice_Maker,bg="red")
Inv_Frame.grid(row=1,columnspan=10)
global Trv
Trv = ttk.Treeview(Inv_Frame)
Trv.pack(side=RIGHT)
Trv["columns"] = ("2","3","4","5","6")
Trv.column("#0",width = 40)
Trv.column(1,width = 80)
Trv.column(2,width = 80)
Trv.column(3,width = 80)
Trv.column(4,width = 80)
Trv.column(5,width = 80)
Trv.column(6,width = 80)
Trv.heading("#0",text="#",anchor=W)
Trv.heading(1,text="Quantity",anchor=W)
Trv.heading(2,text="Item",anchor=W)
Trv.heading(3,text="Style",anchor=W)
Trv.heading(4,text="Cost",anchor=W)
Trv.heading(5,text="Retail",anchor=W)
Trv.heading(6,text="Total",anchor=W)
Scroll = Scrollbar(Inv_Frame,orient="vertical",command=Trv.yview)
Scroll.pack(side=LEFT,fill="y")

def Add_Item():
   Trv.insert("",END,text=Quantity_Box.get(),values=(clicked.get(),StyleMenu.get(),Cost.get(),Retail.get(),str(float(Quantity_Box.get())*float(Cost.get()))))
   total = sum(float(Trv.set(item,6)) for item in Trv.get_children())
   Total_Box.delete(0,'end')
   Total_Box.insert('end',total)
   Quantity_Box.delete(0,END)
   Cost.delete(0,END)
   Retail.delete(0,END)
   clicked.set("Select Item")
   StyleMenu.set("N/A")