/// <summary>

    /// ExcelHelper 辅助类 By Ahoo 2013-10-11

    /// </summary>

    public class ExcelHelper

    {

        /// <summary>

        /// Excel加载进DataTable

        /// </summary>

        /// <param name="fileName"></param>

        /// <returns></returns>

        public static DataTable ReadExcelToDateTable(string fileName)

        {

            string sConnectionString = GetConString(fileName);

            using (OleDbConnection conn = new OleDbConnection(sConnectionString))

            {

                conn.Open();

                DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });

                string[] strTableNames = new string[dtSheetName.Rows.Count];

                for (int k = 0; k < dtSheetName.Rows.Count; k++)

                {

                    strTableNames[k] = dtSheetName.Rows[k]["TABLE_NAME"].ToString();

                }

                //从指定的表明查询数据,可先把所有表明列出来供用户选择

                string strSql = "select * from [" + strTableNames[0] + "] ";

                using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(strSql, conn))

                {

                    DataTable dt_Result = new DataTable();

                    dataAdapter.Fill(dt_Result);

                    return dt_Result;

                }

            }