nuget 须要加载
EPPlus.Core
ExcelDataReader
ExcelDataReader.DataSet

//需要引用的扩展
using ExcelDataReader;
using ExcelPackage = OfficeOpenXml.ExcelPackage;
public static void CreateZhouPianChaTable()
        {
            string tbname = "zhou_pian_cha1";

            //判断表是否存在
            bool isExist = TableIsExist(tbname);
            if (!isExist)
            {
                SQLiteConnection db = ConnectToDatabase(SqLite1);
                _sql = $"create table {tbname} ( ID integer NOT NULL PRIMARY KEY AUTOINCREMENT,size_min real(255),size_max real(255),tolerance_class Text(255),ES real(255),El real(255) )";
                _command = new SQLiteCommand(_sql, db);
                _command.ExecuteNonQuery();
                
                
                string excelFilePath = @"D:\c#\轴的极限偏差.xlsx";
            

                //另外一种将excel 读取到 datatable 的方式
                // using (ExcelPackage package = new ExcelPackage(new FileInfo(excelFilePath))) {
                //     ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
                //     
                //     // 读取数据到 DataTable 中
                //     DataTable dataTable = new DataTable(worksheet.Name);
                //     foreach (var firstRowCell in worksheet.Cells[1, 1, 1, worksheet.Dimension.End.Column]) {
                //         dataTable.Columns.Add(firstRowCell.Text);
                //     }
                //     for (int rowNumber = 2; rowNumber <= worksheet.Dimension.End.Row; rowNumber++) {
                //         var row = worksheet.Cells[rowNumber, 1, rowNumber, worksheet.Dimension.End.Column];
                //         DataRow dr = dataTable.Rows.Add();
                //         foreach (var cell in row) {
                //             dr[cell.Start.Column - 1] = cell.Text;
                //         }
                //     }
                //     
                // }
            
            
            
                var data = ReadExcelToDataSet(excelFilePath);
                DataTable dataTable = data.Tables[0];
                
                
                string addsql = $"INSERT INTO {tbname} (ID, size_min, size_max,tolerance_class,ES,El) VALUES (@Column1, @Column2, @Column3,@Column4,@Column5,@Column6)";
                
                // 插入数据
                using (var bulkInsertCommand = new SQLiteCommand(addsql, db))
                {
                    bulkInsertCommand.Parameters.AddWithValue("@Column1", dataTable.Rows[0][0]);
                    bulkInsertCommand.Parameters.AddWithValue("@Column2", dataTable.Rows[0][1]);
                    bulkInsertCommand.Parameters.AddWithValue("@Column3", dataTable.Rows[0][2]);
                    bulkInsertCommand.Parameters.AddWithValue("@Column4", dataTable.Rows[0][3]);
                    bulkInsertCommand.Parameters.AddWithValue("@Column5", dataTable.Rows[0][4]);
                    bulkInsertCommand.Parameters.AddWithValue("@Column6", dataTable.Rows[0][5]);
                            
                            
                    for (int i = 1; i < dataTable.Rows.Count; i++)
                    {
                        bulkInsertCommand.Parameters["@Column1"].Value = dataTable.Rows[i][0];
                        bulkInsertCommand.Parameters["@Column2"].Value = dataTable.Rows[i][1];
                        bulkInsertCommand.Parameters["@Column3"].Value = dataTable.Rows[i][2];
                        bulkInsertCommand.Parameters["@Column4"].Value = dataTable.Rows[i][3];
                        bulkInsertCommand.Parameters["@Column5"].Value = dataTable.Rows[i][4];
                        bulkInsertCommand.Parameters["@Column6"].Value = dataTable.Rows[i][5];
                
                        bulkInsertCommand.ExecuteNonQuery();
                    }
                }
                db.Close();
            }
        }

/// <summary>
        /// 判断数据表是否存在
        /// </summary>
        /// <param name="tableName"></param>
        /// <returns></returns>
        public static bool TableIsExist(String tableName)
        {
            try
            {
                SQLiteConnection db = ConnectToDatabase(SqLite1);

                using (SQLiteCommand cmd = db.CreateCommand())
                {
                    cmd.CommandText = "SELECT count(*) from sqlite_master where type='table' and name='" + tableName +
                                      "'; ";
                    if (Convert.ToInt32(cmd.ExecuteScalar()) == 0) // 不存在此数据表
                    {
                        return false;
                    }
                    else //存在此数据表，直接加数据
                    {
                        return true;
                    }

                }
            }
            catch
            {
                // ignored
            }

            
            return false;
        }


//创建一个连接到指定数据库
        public static SQLiteConnection ConnectToDatabase(string dbName)
        {
            _mDbConnection = new SQLiteConnection($"Data Source={dbName}.db;Version=3;"); //没有数据库则自动创建
            _mDbConnection.Open();
            return _mDbConnection;
        }

//读取excel
        public static DataSet ReadExcelToDataSet(string fileNmaePath)
        {
            FileStream stream = null;
            IExcelDataReader excelReader = null;
            DataSet dataSet = null;
            try
            {
                //stream = File.Open(fileNmaePath, FileMode.Open, FileAccess.Read);
                stream = new FileStream(fileNmaePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
            }
            catch
            {
                MessageBox.Show("无法读取文件.");
                return null;
            }
            string extension = Path.GetExtension(fileNmaePath);

            if (extension.ToUpper() == ".XLS")
            {
                excelReader = ExcelReaderFactory.CreateBinaryReader(stream);
            }
            else if (extension.ToUpper() == ".XLSX")
            {
                excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
            }
            else
            {
                MessageBox.Show("格式错误.");
                return null;

            }
            dataSet = excelReader.AsDataSet();//第一行当作数据读取
            
            excelReader.Close();
            return dataSet;
        }