如何编辑 KivyMD MDDataTable 中的特定行

Question

我翻阅了源代码和文档，但找不到任何接近我需要的东西，有没有办法以编程方式编辑列和刷新数据表？我想在 MDDatatTable 中更新状态

Answer 1

在这里我创建了一个小项目，用户通过 addproducts 选项卡在数据库中添加产品，数据表显示产品，点击按钮时表格会自行刷新

你必须相应地修改代码

希望这会有所帮助

main.py

from kivymd.app import MDApp
from kivy.lang import Builder
from kivymd.uix.tab import MDTabsBase
from kivymd.uix.floatlayout import MDFloatLayout
from kivymd.uix.datatables import MDDataTable
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.screenmanager import ScreenManager
from kivy.metrics import dp
import mysql.connector
from kivy.core.window import Window 
Window.size =(350,600)


class Tab1(MDFloatLayout, MDTabsBase):
    def product_lists(self, *args):
        database = mysql.connector.connect(host="localhost" , user ="root" , password= "dumbre1902", database="localvendor")
        cursor = database.cursor()
        sql_select_Query = "select * from addproduct"
        cursor.execute(sql_select_Query)
        # get all records
        records = cursor.fetchall()
        layout = AnchorLayout()
        self.product_table = MDDataTable(
            pos_hint={'center_y': 0.41, 'center_x': 0.5},
            size_hint=(0.9, 0.78),
            elevation= 15,
            rows_num = 100,
            column_data=[
                ("Product Name", dp(25)),
                ("MRP", dp(15)),
                ("Quantity", dp(20)),
                ("Product Description", dp(30)),
                ],
                row_data=[
                        (f"{row[0]}", f"{row[1]}", f"{row[2]}", f"{row[3]}") for row in records
                ],
            )

        self.add_widget(self.product_table)
        return layout

    def on_enter(self):
        self.product_lists()

class Tab2(MDFloatLayout, MDTabsBase):
    pass

class DemoApp(MDApp):

    def build(self):
        sm = ScreenManager()
        sm.add_widget(Builder.load_file("testwidgets.kv"))
        return sm



DemoApp().run()

testwidgets.kv

#:import Snackbar kivymd.uix.snackbar.Snackbar

MDScreen:
    name: 'sellerprofile'
    MDNavigationLayout:
        size : root.width, root.height

        ScreenManager:
            id: screen_manager

            Screen:
                name: "mddatatable"

                BoxLayout:
                    orientation: 'vertical'

                    MDToolbar:
                        id: toolbar
                        title: "LOCAL VENDOR"
                        md_bg_color: 60/255, 194/255, 89/255, 1
                        

                    MDTabs:
                        lock_swiping: True
                        font_name: "fonts/Product Sans Regular.ttf"
                        background_color: 60/255, 194/255, 89/255, 1
                        Tab1:
                            
                            title: "Products"


                        Tab2:

                            title: "Add Products"


<Tab1>:


    MDRaisedButton:
        elevation: 13
        font_size: "16sp"
        size_hint: .4, .1
        text_color: 0/255,0/255,0/255,1
        md_bg_color: 60/255, 194/255, 89/255, 1
        text: 'See Products'
        on_press: 
            root.on_enter()
            Snackbar(text="Tap again to see recently added products",snackbar_x="10dp",snackbar_y="10dp",size_hint_x=.9,).open()
        pos_hint: {'center_x': .5, 'center_y': .9}
        font_name: "fonts/Product Sans Regular.ttf"
        


<Tab2>:

    MDFloatLayout:
        size_hint: .70, .03
        pos_hint: {"center_x": .5,"center_y": .83}

        MDTextField:
            id : productname
            hint_text: "Product Name"
            mode: "rectangle"
            pos_hint: {"center_x": .5,"center_y": .5}

    MDFloatLayout:
        size_hint: .30, .03
        pos_hint: {"center_x": .3,"center_y": .7}

        MDTextField:
            id: mrp
            hint_text: "MRP"
            mode: "rectangle"
            pos_hint: {"center_x": .5,"center_y": .5}
            input_filter: 'int'

    MDFloatLayout:
        size_hint: .30, .03
        pos_hint: {"center_x": .6,"center_y": .7}

        MDTextField:
            id: quantity
            hint_text: "Quantity"
            mode: "rectangle"
            pos_hint: {"center_x": .82,"center_y": .5}

    MDFloatLayout:
        size_hint: .70, .03
        pos_hint: {"center_x": .5,"center_y": .57}

        MDTextField:
            id: productdescription
            hint_text: "Product Description (optional)"
            mode: "rectangle"
            multiline: True
            pos_hint: {"center_x": .5,"center_y": .5}

    MDRaisedButton:
        text: "Add Product"
        elevation: 15
        size_hint: .5, .1
        font_size: "18sp"
        text_color: 0/255,0/255,0/255,1
        md_bg_color: 60/255, 194/255, 89/255, 1
        md_bg_color_disabled: 222/255, 222/255, 222/255, 1
        pos_hint: {"center_x": .5,"center_y": .3}
        font_name: "fonts/Product Sans Regular.ttf"
        disabled: True if (productname.text and mrp.text) == '' else False
        on_release:
            app.addproduct( productname, mrp , quantity , productdescription )
            app.show_product_added()