using ExcelDataReader;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;

namespace Io.Github.Kerwinxu.LibShapes.Utils
{
    /// <summary>
    /// 这个是一个工具类，可以读取excel数据的
    /// </summary>
    public  class ExcelData
    {
        public static DataTable LoadExcel(string file_path)
        {
            using (var stream = File.Open(file_path, FileMode.Open, FileAccess.Read))
            {
                using (var reader = ExcelReaderFactory.CreateReader(stream))
                {

                    // Gets or sets a callback to obtain configuration options for a DataTable. 
                    var conf = new ExcelDataSetConfiguration()
                    {
                        // Gets or sets a value indicating whether to set the DataColumn.DataType 
                        // property in a second pass.
                        UseColumnDataType = true,

                        // Gets or sets a callback to determine whether to include the current sheet
                        // in the DataSet. Called once per sheet before ConfigureDataTable.
                        FilterSheet = (tableReader, sheetIndex) => true,

                        // Gets or sets a callback to obtain configuration options for a DataTable. 
                        ConfigureDataTable = (tableReader) => new ExcelDataTableConfiguration()
                        {
                            // Gets or sets a value indicating the prefix of generated column names.
                            EmptyColumnNamePrefix = "Column",

                            // Gets or sets a value indicating whether to use a row from the 
                            // data as column names. 是否使用数据作为列名
                            UseHeaderRow = true,

                            //// Gets or sets a callback to determine which row is the header row. 
                            //// Only called when UseHeaderRow = true.
                            //ReadHeaderRow = (rowReader) =>
                            //{
                            //    // F.ex skip the first row and use the 2nd row as column headers:
                            //    rowReader.Read();
                            //},

                            // Gets or sets a callback to determine whether to include the 
                            // current row in the DataTable.
                            FilterRow = (rowReader) =>
                            {
                                return true;
                            },

                            // Gets or sets a callback to determine whether to include the specific
                            // column in the DataTable. Called once per column after reading the 
                            // headers.
                            FilterColumn = (rowReader, columnIndex) =>
                            {
                                return true;
                            }
                        }
                    };

                    var ds = reader.AsDataSet(conf);
                    // 这里方便只是导入第一个
                    return ds.Tables[0];
                }

            }

            return null;
        }
    }
}