WPF开发技巧：在WPF的DataGrid中实现动态增加列并刷新表格

1.VM代码

using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;
using Newtonsoft.Json;
using Prism.Commands;
using System.Data;
using System.Windows.Controls;

namespace Prism_AOI.Modules.SystemSettingModule.ViewModels
{
    public class CameraSettingViewModel : BindableBase
    {
        private ObservableCollection _testList;

        public ObservableCollection TestList
        {
            get { return _testList; }
            set { SetProperty(ref _testList, value); }
        }
        private ICommand _addCommand;
        public ICommand AddCommand
        {
            get { return _addCommand; }
            set { SetProperty(ref _addCommand, value); }
        }
        public CameraSettingViewModel()
        {
            _addCommand = new DelegateCommand(AddTest);
            _dataGridLoadedCommand = new DelegateCommand