c#将Excel数据导入到数据库的实现代码(2)

/// <summary>
        /// 从System.Data.DataTable导入数据到数据库
        /// </summary>
        /// <param></param>
        /// <returns></returns>
        public int InsetData(System.Data.DataTable dt)
        {
            int i = 0;
            string lng = "";
            string lat = "";
            string offsetLNG = "";
            string offsetLAT = "";

foreach (DataRow dr in dt.Rows)
            {
                lng = dr["LNG"].ToString().Trim();
                lat = dr["LAT"].ToString().Trim();
                offsetLNG = dr["OFFSET_LNG"].ToString().Trim();
                offsetLAT = dr["OFFSET_LAT"].ToString().Trim();

//sw = string.IsNullOrEmpty(sw) ? "null" : sw;
                //kr = string.IsNullOrEmpty(kr) ? "null" : kr;

string strSql = string.Format("Insert into DBToExcel (LNG,LAT,OFFSET_LNG,OFFSET_LAT) Values ('{0}','{1}',{2},{3})", lng, lat, offsetLNG, offsetLAT);

string strConnection = ConfigurationManager.ConnectionStrings["ConnectionStr"].ToString();
                SqlConnection sqlConnection = new SqlConnection(strConnection);
                try
                {
                    // SqlConnection sqlConnection = new SqlConnection(strConnection);
                    sqlConnection.Open();
                    SqlCommand sqlCmd = new SqlCommand();
                    sqlCmd.CommandText = strSql;
                    sqlCmd.Connection = sqlConnection;
                    SqlDataReader sqlDataReader = sqlCmd.ExecuteReader();
                    i++;
                    sqlDataReader.Close();
                }
                catch (Exception ex)
                {
                    throw ex;
                }
                finally
                {
                    sqlConnection.Close();

}
                //if (opdb.ExcSQL(strSql))
                //    i++;
            }
            return i;
        }
    }
}