ATJ_MES_ZY/Equips/Mesnac.Math.~/Mesnac.Math.Feeding/AlarmInfo.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Mesnac.Maths;
using System.Data;
using Mesnac.Equips;
using System.Data.Common;
using System.Data.SqlClient;

namespace Mesnac.Math.Feeding
{
    public class AlarmInfo : IMath
    {
        private object NullResult = new DataTable();

        public string Name
        {
            get { return "报警信息"; }
        }

        public string Caption
        {
            get
            {
                StringBuilder sb = new StringBuilder();
                sb.AppendLine("必须填写使用数据库连接的设备名称");
                sb.AppendLine("例：");
                sb.Append("    ").Append(Name).AppendLine("(A1)");
                return sb.ToString();
            }
        }

        public object Execute(string[] parameters, object[] buff)
        {
            string id = string.Empty;
            if ((buff.Length > 0)
                && (buff[0] != null)
                && (!string.IsNullOrWhiteSpace(buff[0].ToString())))
            {
                id = buff[0].ToString();
            }
            if (string.IsNullOrWhiteSpace(id))
            {
                return this.NullResult;
            }
            if (parameters.Length < 1)
            {
                return this.NullResult;
            }
            string equipName = parameters[0];
            BaseEquip equip = null;
            if (!Mesnac.Equips.Factory.Instance.AllEquips.TryGetValue(equipName, out equip))
            {
                return this.NullResult;
            }
            DataTable Result = new DataTable();
            try
            {
                DbConnection conn = equip.Main.ConnType.Connection as DbConnection;
                if (conn == null)
                {
                    return this.NullResult;
                }

                using (SqlConnection sqlCon = new SqlConnection(conn.ConnectionString))
                {
                    sqlCon.Open();
                    string sqlstr = "SELECT ssValue FROM SysKeyValue WHERE ssKey='AlarmInfo'";
                    SqlCommand sqlcmd = new SqlCommand();
                    sqlcmd.Connection = sqlCon;
                    sqlcmd.CommandType = CommandType.Text;
                    sqlcmd.CommandText = sqlstr;

                    object obj = sqlcmd.ExecuteScalar();
                    string strSql2 = string.Empty;
                    if (obj != null && obj != DBNull.Value)
                    {
                        strSql2 = obj.ToString();
                        if (string.IsNullOrWhiteSpace(strSql2))
                        {
                            return this.NullResult;
                        }
                        SqlDataAdapter sqlAdapter = new SqlDataAdapter(strSql2, sqlCon);
                        DataSet ds = new DataSet();
                        sqlAdapter.Fill(ds);
                        Result = ds.Tables[0];
                    }
                    sqlCon.Close();
                }

                #region 旧代码，在多线程访问数据库下容易发生DataReader未关闭错误
                //bool isOpen = true;
                //if (conn.State != ConnectionState.Open)
                //{
                //    isOpen = false;
                //    conn.Open();
                //}

                //DbCommand sqlcmd = conn.CreateCommand();

                //sqlcmd.CommandType = System.Data.CommandType.Text;
                //string sqlstr = "SELECT ssValue FROM SysKeyValue WHERE ssKey='AlarmInfo'";
                //sqlcmd.CommandText = sqlstr;
                //object obj = sqlcmd.ExecuteScalar();
                //string strSql2 = string.Empty;
                //if (obj != null && obj != DBNull.Value)
                //{
                //    strSql2 = obj.ToString();
                //    sqlcmd.Parameters.Clear();
                //    sqlcmd.CommandText = strSql2;
                //    using (DbDataReader reader = sqlcmd.ExecuteReader())
                //    {
                //        for (int i = 0; i < reader.FieldCount; i++)
                //        {
                //            Result.Columns.Add(reader.GetName(i));
                //        }
                //        while (reader.Read())
                //        {
                //            DataRow row = Result.NewRow();
                //            for (int i = 0; i < reader.FieldCount; i++)
                //            {
                //                row[reader.GetName(i)] = reader[i];
                //            }
                //            Result.Rows.Add(row);
                //        }
                //        reader.Close();
                //    }
                //    sqlcmd.Dispose();

                //}
                //if (!isOpen)
                //{
                //    conn.Close();
                //}
                //if (string.IsNullOrWhiteSpace(strSql2))
                //{
                //    return this.NullResult;
                //}
                #endregion
            }
            catch (Exception ex)
            {
                ICSharpCode.Core.LoggingService.Error("发生错误在Mesnac.Math.Fedding.AlarmInfo：" + ex.Message, ex);
            }
            Result.TableName = String.Format("T_{0}_{1}", "AlarmInfo", Guid.NewGuid().ToString());
            return Result;
        }
    }
}