ExcelHelper/Views/ViewModels/ImportViewModel.cs

using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows.Controls;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Messaging;
using ExcelHelper.Message;
using MiniExcelLibs;

namespace ExcelHelper.Views.ViewModels
{
    public partial class ImportViewModel : ObservableRecipient, IViewModel
    {

        public void FileDrop(string[] files)
        {
            ExcelFiles.Clear();
            foreach (var item in files)
            {
                ExcelFiles.Add(item);
            }
            //ReadForExcel(ExcelFiles.First());
            CurrentFilePath = ExcelFiles.First();
        }

        public void ReadForExcel(string path)
        {
            ExcelData = MiniExcel.Query(path, useHeaderRow: UseHeaderRow);
            var columns = MiniExcel.GetColumns(path, useHeaderRow: UseHeaderRow);
            GenColumns(columns);
        }
        private void GenColumns(IEnumerable<string> columns)
        {
            Columns.Clear();
            if (UseHeaderRow)
            {

                foreach (var columnName in columns)
                {
                    var column = new DataGridTextColumn
                    {
                        Header = columnName,
                        Binding = new System.Windows.Data.Binding($"{columnName}"),
                        Width = DataGridLength.Auto
                    };
                    Columns.Add(column);
                }
            }
            else
            {
                for (var i = 'A'; i < 'Z'; i++)
                {
                    var column = new DataGridTextColumn
                    {
                        Header = $"{i}",
                        Binding = new System.Windows.Data.Binding($"{i}"),
                        Width = DataGridLength.Auto
                    };
                    Columns.Add(column);
                }
            }
            if (Columns.Count > 0)
                WeakReferenceMessenger.Default.Send(new UpdateDataGridColumnsMessage([.. Columns]));
            else
            {
                WeakReferenceMessenger.Default.Send(new ErrorDialogMessage("未读取到列信息!"));
            }
        }
        #region Props
        [ObservableProperty]
        private IEnumerable<dynamic> _excelData;

        [ObservableProperty]
        private ObservableCollection<string> _excelFiles = [];

        [ObservableProperty]
        private ObservableCollection<DataGridColumn> _columns = [];

        /// <summary>
        /// 使用首行作为表头
        /// </summary>
        [ObservableProperty]
        private bool _useHeaderRow;

        /// <summary>
        /// 选中的Sheet
        /// </summary>
        [ObservableProperty]
        private string _selectedSheetName;

        /// <summary>
        /// Sheets列表
        /// </summary>
        [ObservableProperty]
        private ObservableCollection<string> _sheets = [];
        /// <summary>
        /// 起始位置
        /// </summary>
        [ObservableProperty]
        private string _startCell;
        /// <summary>
        /// 结束位置
        /// </summary>
        [ObservableProperty]
        private string _endCell;
        /// <summary>
        /// 最大行数
        /// </summary>
        [ObservableProperty]
        private string _maxRow;

        /// <summary>
        /// 当前文件路径
        /// </summary> 
        private string _currentFilePath;
        public string CurrentFilePath
        {
            get => _currentFilePath;
            set
            {
                SetProperty(ref _currentFilePath, value);
                ReadForExcel(value);
            }
        }

        /// <summary>
        /// Excel文件密码
        /// </summary>
        [ObservableProperty]
        private string _excelPassword;

        #endregion
    }
}