C#读取Excel写入数据库/将 Excel 文件转成 DataTable

#region 读取Excel

        /// <summary>
        /// 将 Excel 文件转成 DataTable 后,再把 DataTable中的数据写入表Products
        /// </summary>
        /// <param name="serverMapPathExcelAndFileName"></param>
        /// <param name="excelFileRid"></param>
        /// <returns></returns>
        public static int WriteExcelToDataBase(string excelFileName)
        {
            int rowsCount = 0;
            OleDbConnection objConn = new System.Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + excelFileName+ ";" + "Extended Properties=Excel 8.0;");
            objConn.Open();
            try
            {
                DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);
                string sheetName = string.Empty;
                for (int j = 0; j < schemaTable.Rows.Count; j++)
                {
                    sheetName = schemaTable.Rows[j][2].ToString().Trim();//获取 Excel 的表名，默认值是sheet1
                    DataTable excelDataTable = DbHelperSQL.ExcelToDataTable(excelFileName, sheetName, true);
                    if (excelDataTable.Columns.Count > 1)
                    {
                        　 SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction);
                            sqlbulkcopy.DestinationTableName = "Products";//数据库中的表名

                            sqlbulkcopy.WriteToServer(excelDataTable);
                            sqlbulkcopy.Close();
                    }
                }
            }
            catch (SqlException ex)
            {
                throw ex;
            }
            finally
            {
                objConn.Close();
                objConn.Dispose();
            }
            return rowsCount;

        }

 /// <summary>
        /// 读取Excel
        /// </summary>
        /// <param name="Path"></param>
        /// <param name="tableName"></param>
        /// <returns></returns>
        public static DataSet ExcelToDS(string Path, string sheetName)
        {
            string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + Path + ";" + "Extended Properties=Excel 8.0;";  //HDR=Yes;
            DataSet ds = null;
            using (OleDbConnection conn = new OleDbConnection(strConn))
            {
                OleDbDataAdapter myCommand = null;
                try
                {
                    conn.Open();
                    string strExcel = "";
                    strExcel = "select * from [" + sheetName + "$]";
                    myCommand = new OleDbDataAdapter(strExcel, strConn);
                    ds = new DataSet();
                    myCommand.Fill(ds, "table1");
                }
                catch (SqlException ex)
                {
                    throw ex;
                }
                finally
                {
                    myCommand.Dispose();
                    conn.Close();
                }
                return ds;
            }
        }

        /// <summary>
        /// 将 Excel 文件转成 DataTable
        /// </summary>
        /// <param name="serverMapPathExcel">Excel文件及其路径</param>
        /// <param name="strSheetName">工作表名,如:Sheet1</param>
        /// <param name="isTitleOrDataOfFirstRow">True 第一行是标题,False 第一行是数据</param>
        /// <returns>DataTable</returns>
        public static DataTable ExcelToDataTable(string serverMapPathExcel, string strSheetName, bool isTitleOrDataOfFirstRow)
        {

            string HDR = string.Empty;//如果第一行是数据而不是标题的话, 应该写: "HDR=No;"
            if (isTitleOrDataOfFirstRow)
            {
                HDR = "YES";//第一行是标题
            }
            else
            {
                HDR = "NO";//第一行是数据
            }
            //源的定义
            string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + serverMapPathExcel + ";" + "Extended Properties='Excel 8.0;HDR=" + HDR + ";IMEX=1';";

            //Sql语句
            //string strExcel = string.Format("select * from [{0}$]", strSheetName); 这是一种方法
            string strExcel = "select * from   [" + strSheetName + "]";
            //定义存放的数据表
            DataSet ds = new DataSet();

            //连接数据源
            using (OleDbConnection conn = new OleDbConnection(strConn))
            {
                try
                {
                    conn.Open();
                    //适配到数据源
                    OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn);
                    
                    adapter.Fill(ds, strSheetName);
                }
                catch (System.Data.SqlClient.SqlException ex)
                {
                    throw ex;
                }
                finally
                {
                    conn.Close();
                    conn.Dispose();
                }
            }
            return ds.Tables[strSheetName];
        }
        #endregion