下拉文件列表依赖于另一个下拉文件夹列表

Question

我需要帮助如何从另一个下拉文件夹列表做依赖的下拉文件列表。在一个文件夹中，我有5个文件夹列表，然后对于每个文件夹，我有5个文件列表。在我的代码中，我已经做了2下拉函数，这是第一个下拉:列出所有的文件夹。第二个下拉:我想在第二个下拉列表依赖于我在第一个下拉选择的文件夹。这可能吗?

例如:

目录:'C:UsersTestFile'

文件夹列表:-folder1-folder2-folder3-folder4-folder5

每个文件夹中的文件列表:文件夹1:apple1,apple2,apple3，.....文件夹2:orange1,orange2,orange3，.....文件夹3:grape1,grape2,grape3，.....文件夹4:lych1,lych2,lych3，.....文件夹5:strwberry1,strwberry2,strwberry3，.....

如果我在第一个下拉菜单中选择folder1，我想要所有文件(apple1 apple2 apple3 .....)

我的代码

from tkinter import *
from functools import partial
import os
import tkinter as tk
from tkinter import ttk
#import tkinter as tk
from tkinter import filedialog, messagebox, ttk
import pandas as pd
import webbrowser
from webbrowser import open as openlink
import urllib
def open(file_menu):
filename = file_menu.get()
open_in_browser_link = f"file://{os.path.join(folder, filename)}"
print(open_in_browser_link)
webbrowser.open(open_in_browser_link)

def clear_data():
#    tv1.delete(*tv1.get_children())
return None

folder = os.path.realpath(r'C:UsersTestFile')
filelist = [fname for fname in os.listdir(folder)]
master = tk.Tk()
master.geometry('1200x800')
master.title('THB')
# Frame for TreeView
frame0 = tk.LabelFrame(master, text="Chapter",background="light grey")
frame0.place(height=500, width=1200, rely=0.0, relx=0.0)
optmenu = ttk.Combobox(frame0, values=filelist, state='readonly')
optmenu.pack()
optmenu.set("Chapter")
optmenu1 = ttk.Combobox(frame0, values=????, state='readonly')
optmenu1.pack()
optmenu1.set("SubChapter")
button_select = tk.Button(frame0, text="Show Data",
width=15,
height=2,
compound=tk.CENTER,
command=partial(open, optmenu1))
button_select.place(relx=0.5, rely=0.5)
button_select.pack(side=tk.TOP)

master.mainloop()

Answer 1

代码背后的基本算法可以拆分如下:

• 将第一个组合框的每个选项选择信号绑定到一个函数，
• 扫描目录并将可用文件设置到第二个组合框。

现在，这个操作的重要部分是:

optmenu.bind("<<ComboboxSelected>>", onSelect)
...
...
def onSelect(event):
folder_name = filelist[event.widget.current()]
folder_path = os.path.join(folder, folder_name)
print(f"folder selected:{folder_name}, folder_path:{folder_path}, index:{event.widget.current()}")
global sub_files
sub_files = []
for f_name in os.listdir(folder_path):
sub_files.append(f_name)
print(sub_files)
optmenu1['values'] = sub_files  # set sub directories to combobox

完整代码:

from tkinter import *
from functools import partial
import os
import tkinter as tk
from tkinter import ttk
# import tkinter as tk
from tkinter import filedialog, messagebox, ttk
import pandas as pd
import webbrowser
from webbrowser import open as openlink
import urllib

def open(file_menu):
filename = file_menu.get()
open_in_browser_link = f"file://{os.path.join(folder, filename)}"
print(open_in_browser_link)
webbrowser.open(open_in_browser_link)

def clear_data():
#    tv1.delete(*tv1.get_children())
return None

def onSelect(event):
folder_name = filelist[event.widget.current()]
folder_path = os.path.join(folder, folder_name)
print(f"folder selected:{folder_name}, folder_path:{folder_path}, index:{event.widget.current()}")
global sub_files
sub_files = []
for f_name in os.listdir(folder_path):
sub_files.append(f_name)
print(sub_files)
optmenu1['values'] = sub_files  # set sub directories to combobox

folder = os.path.realpath(r'C:UsersTestFile')
sub_files = []
# folder = os.path.realpath(r'./testing')
filelist = [fname for fname in os.listdir(folder)]
master = tk.Tk()
master.geometry('1200x800')
master.title('THB')
# Frame for TreeView
frame0 = tk.LabelFrame(master, text="Chapter", background="light grey")
frame0.place(height=500, width=1200, rely=0.0, relx=0.0)
optmenu = ttk.Combobox(frame0, values=filelist, state='readonly')
optmenu.pack()
optmenu.set("Chapter")
optmenu.bind("<<ComboboxSelected>>", onSelect)
optmenu1 = ttk.Combobox(frame0, values=[], state='readonly')
optmenu1.pack()
optmenu1.set("SubChapter")
button_select = tk.Button(frame0, text="Show Data",
width=15,
height=2,
compound=tk.CENTER,
command=partial(open, optmenu1))
button_select.place(relx=0.5, rely=0.5)
button_select.pack(side=tk.TOP)
master.mainloop()

现在，这段代码打开C:UsersTestFile文件夹，扫描每个目录并设置为第一个组合框(optmenu)。

然后，当您选择optmenu中的任何一个选项时，它调用onSelect()函数。这个onSelect函数，读取optmenu中选择的文件夹中所有可用的文件，并显示optmenu1中可用的文件。