//定义组件
private System.Timers.Timer time;
public int nowhour;
public int minutes;
public string sendTime;
public Thread th;
public string isOpen;//是否启用定时发送
public string strToEUser;
public static int index = -1;
public static ArrayList mulitaddress;
//服务开始
protected override void OnStart(string[] args)
{
 time = new System.Timers.Timer();
 time.Enabled = true;
 time.AutoReset = true;
 //定时执行方法
  time.Elapsed+=new System.Timers.ElapsedEventHandler(time_Elapsed);
  UserEmail toUser =new UserEmail();
  mulitaddress = GetMailAdressName();
  // LogHelper.SaveNote("当前索引的值" + index.ToString());
  Thread.Sleep(2000);
  time.Start();
}
public class LogHelper
{
 public static void SaveNote(string note)
 {
  FileStream stream = new FileStream(GetLogDirectory("Common") + DateTime.Now.ToString("yyyy-MM-dd") + ".txt", FileMode.Append, FileAccess.Write, FileShare.Delete | FileShare.ReadWrite);
  StreamWriter writer = new StreamWriter(stream, Encoding.UTF8);
  writer.WriteLine("================================================================");
  writer.WriteLine(string.Format("Note:/t{0}", note));
  writer.WriteLine(string.Format("DateTime:/t{0}/r/n/r/n",DateTime.Now.ToString()));
  stream.Flush();
  writer.Close();
  stream.Close();
  stream.Dispose();
  writer.Dispose();
 }
 public static void SaveNote(string note, string txtname)
 {
  FileStream stream = new FileStream(GetLogDirectory(txtname) + DateTime.Now.ToString("yyyy-MM-dd") + ".txt", FileMode.Append, FileAccess.Write, FileShare.Delete | FileShare.ReadWrite);
  StreamWriter writer = new StreamWriter(stream, Encoding.GetEncoding("gb2312"));
  writer.WriteLine("================================================================");
  writer.WriteLine(string.Format("Note:/t{0}", note));
  writer.WriteLine(string.Format("DateTime:/t{0}/r/n/r/n", DateTime.Now.ToString("yyyyMMddHHmmss")));
  stream.Flush();
  writer.Close();
  stream.Close();
  stream.Dispose();
  writer.Dispose();
 }
 public static void SaveException(Exception e)
 {
  SaveException(e, string.Empty);
 }
 public static void SaveException(Exception e, string memo)
 {
  FileStream stream = new FileStream(GetLogDirectory("Common") + DateTime.Now.ToString("yyyy-MM-dd") + ".txt", FileMode.Append, FileAccess.Write, FileShare.Delete | FileShare.ReadWrite);
  StreamWriter writer = new StreamWriter(stream);
  writer.WriteLine("================================================================");
  writer.WriteLine(string.Format("Memo:/t{0}", memo));
  writer.WriteLine(string.Format("DateTime:/t{0}", DateTime.Now.ToShortTimeString()));
  writer.WriteLine(string.Format("Message:/t{0}", e.Message));
  writer.WriteLine(string.Format("StackTrace:/r/n----------/r/n{0}/r/n----------/r/n/r/n/r/n", e.StackTrace));
  stream.Flush();
  writer.Close();
  stream.Close();
  stream.Dispose();
  writer.Dispose();
 }
 public static string GetLogDirectory(string category)
 {
  string baseDirectory = string.Empty;
  if ((HttpContext.Current != null) && (HttpContext.Current.Server != null))
  {
   baseDirectory = HttpContext.Current.Server.MapPath("~");
  }
  else
  {
   baseDirectory = AppDomain.CurrentDomain.BaseDirectory;
  }
  if ((baseDirectory[baseDirectory.Length - 1] != '/') && (baseDirectory[baseDirectory.Length - 1] != '//'))
  {
   baseDirectory = baseDirectory + @"/";
  }
  baseDirectory = string.Format(@"{0}Log/{1}/", baseDirectory, category);
  if (!Directory.Exists(baseDirectory))
  {
   Directory.CreateDirectory(baseDirectory);
  }
  return baseDirectory;
 }
}
void time_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
 try
 {
  if (mulitaddress != null)
  {
   LogHelper.SaveNote("进入time_Elapsed");
   //获取定时发送时间
   sendTime = Convert.ToString(GetConfigValue("sendTime"));
   LogHelper.SaveNote("sendTime" + sendTime);
   //是否开启定时发送功能
   isOpen = GetConfigValue("isOpen");
   int sleeptime = Convert.ToInt32(GetConfigValue("SleepTime"));
   int stoptime = Convert.ToInt32(GetConfigValue("stoptime"));
   //LogHelper.SaveNote("数组长度" + mulitaddress.Count);
   // LogHelper.SaveNote("是否开启定时发送功能" + isOpen + "定时时间" + sendTime + "定时小时数:" + Convert.ToInt32(sendTime.Split(new char[] { ':' })[0]) + "定时分钟数:" + Convert.ToInt32(sendTime.Split(new char[] { ':' })[1]));
   if (isOpen == "true")
   {
    //现在时间 小时
    nowhour = Convert.ToInt32(DateTime.Now.Hour.ToString());//10
    //现在分钟
    minutes = Convert.ToInt32(DateTime.Now.Minute.ToString());//5
    //获取发送小时
    int sendhour = Convert.ToInt32(sendTime.Split(new char[] { ':' })[0]);
    //获取发送的分钟
    int sendMinute = Convert.ToInt32(sendTime.Split(new char[] { ':' })[1]);
    LogHelper.SaveNote("进入定时发送邮件服务! 定时小时为:" + sendhour.ToString() + "定时分钟为:" + sendMinute.ToString() + "现在小时为:" + nowhour.ToString() + "现在定时的分钟为:" + minutes.ToString());
    LogHelper.SaveNote("当前索引的值" + index.ToString());
    if (nowhour == stoptime)
    {
     LogHelper.SaveNote("停止时间点到了 邮件停止发送 ！！！");
     index = -1;
    }
    else
    {
     //如果和当前的时间 小时相等 则定时发送邮件
     if ((Convert.ToDateTime(DateTime.Now.ToShortTimeString()) >= Convert.ToDateTime(sendTime)) && index < mulitaddress.Count)
     {
      index++;
      if (index < mulitaddress.Count)
      {
       SendEmail(((UserEmail)mulitaddress[index]));
      }
      else
      {
       LogHelper.SaveNote("发送完毕 当前的索引值为" + index.ToString());
      }
     }
    }
   }
   else
   {
    //LogHelper.SaveNote("当前索引的值" + index.ToString());
    index++;
    if (index < mulitaddress.Count)
    {
     SendEmail(((UserEmail)mulitaddress[index]));
    }
    else
    {
     LogHelper.SaveNote("发送完毕 时间停止");
     time.Enabled = false;
     time.Stop();
    }
   }
   Thread.Sleep(sleeptime);
  }
  else
   LogHelper.SaveNote("mulitaddress=null");
 }
 catch (Exception ex) 
 {
  LogHelper.SaveNote(ex.ToString());
 }
}
public ArrayList GetMailAdressName()
{
 ArrayList list = new ArrayList();
 string strSQL = "select b.mailAddress, a.mailtemplate,a.title from tg_product as a inner join tg_mailOrder as b on a.ccode=b.ccode where a.createtime=(select max(createtime) from tg_product)";
 SqlDataReader dr = SqlHelper.ExecuteReader(CommandType.Text, strSQL, null);
 if (dr.HasRows)
 {
  while (dr.Read())
  {
   UserEmail email = new UserEmail();
   email.Mailaddres = dr["mailAddress"].ToString();
   email.Title = dr["title"].ToString();
   email.Contents = dr["mailtemplate"].ToString();
   list.Add(email);
  }
 }
 return list;
}
/// <summary>
/// 定义用户邮件 标题 内容 Email地址
/// </summary>
public class UserEmail {
 private string title;
 private string contents;
 public string Contents
 {
  get { return contents; }
  set { contents = value; }
 }
 private string mailaddres;
 public string Mailaddres
 {
  get { return mailaddres; }
  set { mailaddres = value; }
 }
 public string Title { 
 get{return title;}
  set { title = value; }
 }
}
#region 发送邮件
/// <summary>
/// 发送邮件
/// </summary>
public void SendEmail(UserEmail user)
{
 try
 {
  LogHelper.SaveNote("进入SendEmail!!!");
  //邮件服务器
  string smtpserver = GetConfigValue("smtpserver");
  //发件人的邮箱名称
  string emailuserName = GetConfigValue("emailuserName");
  //发件人的邮箱密码
  string emailuserpwd = GetConfigValue("emailuserpwd");
  //邮箱地址
  string emailfrom = GetConfigValue("emailfrom");
  int port = Convert.ToInt32(GetConfigValue("serverPort"));
  bool f = true;
  //是否经过SSL加密
  string isSSL = GetConfigValue("SSL");
  if (isSSL == "true")
  {
   f = true;
  }
  else
  {
   f = false;
  }
  LogHelper.SaveNote("发件人的邮箱名称" + emailuserName + "邮件地址(emailFrom)" + emailfrom + "收件人" + user.Mailaddres);
  SendEmailToUser(smtpserver, port, f, user.Mailaddres, null, emailuserName, emailuserpwd, emailfrom, user.Title,user.Contents);
  LogHelper.SaveNote("Send Mail Success");
 }
 //获取异常信息
 catch (Exception error)
 {
  //写入异常信息
  using (StreamWriter sw = new StreamWriter("F://MailErrorlog.txt", true, System.Text.Encoding.UTF8))
  {
   sw.WriteLine(DateTime.Now.ToString() + "：");
   sw.WriteLine("Exception 异常信息如下.................");
   sw.WriteLine(error.ToString());
   sw.WriteLine("---------------------------------------------");
   sw.Close();
  }
 }
}
#endregion
#region 利用.Net自带类(SmtpClient) 发送邮件
/// <summary>
/// 利用.Net自带类(SmtpClient) 发送邮件
/// </summary>
/// <param name="stmpserver">邮件服务器</param>
/// <param name="username">用户名(邮箱名称)</param>
/// <param name="pwd">密码</param>
/// <param name="f">是否经过SSL加密</param>
/// <param name="port">邮件服务器端口(没有加密 一般都是25)</param>
/// <param name="strfrom">发件人</param>
/// <param name="strto">收件人</param>
/// <param name="subject">主题</param>
/// <param name="body">内容</param>
/// <param name="Mulitaddress">发送多人 收件人的邮箱地址以逗号隔开</param>
/// <param name="attachmentName">发送的附件名称 没有附件则为null or ""</param>
public void SendEmailToUser(string stmpserver,int port,bool f, string Mulitaddress, string attachmentName, string username, string pwd, string strfrom, string subject, string body)
{
 string ErrorLog = GetConfigValue("ErrorLog");
 SmtpClient smtp = new SmtpClient();
 //发送邮件的方式
 smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
 //指定邮件服务器
 smtp.Host = stmpserver;
 //Gmail QQ stmp ssl加密使用的端口 
 smtp.Port = port;
 smtp.EnableSsl = f; ;//true 经过ssl加密 
 //验证发件人的身份 用户名(邮件地址和密码)
 smtp.Credentials = new System.Net.NetworkCredential(username, pwd);
 //初始化信息(来自 接收人)
 MailMessage _mailmessage = new MailMessage();
 //_mailmessage.To = strto;
 //发送多个人 接收人邮件地址以,隔开
 _mailmessage.From = new MailAddress(strfrom);
 _mailmessage.To.Add(Mulitaddress);
 //如果发送失败，SMTP 服务器将发送 失败邮件通知
 _mailmessage.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
 //优先级
 _mailmessage.Priority = MailPriority.High;
 //发送主题
 _mailmessage.Subject = subject;
 //有附件则添加附件
 if (!string.IsNullOrEmpty(attachmentName))
 {
  System.Net.Mail.Attachment attch = new System.Net.Mail.Attachment(attachmentName);
  _mailmessage.Attachments.Add(attch);
 }
 //邮件主题编码
 _mailmessage.SubjectEncoding = System.Text.Encoding.UTF8;
 //指定发送的格式 (Html)
 _mailmessage.IsBodyHtml = true;
 //指定发送邮件的编码
 _mailmessage.BodyEncoding = System.Text.Encoding.UTF8;
 //指定邮件内容
 _mailmessage.Body = body;
 //发送邮件
 try
 {
  smtp.Send(_mailmessage);
 }
 catch (Exception ex)
 {
  using (StreamWriter writer = new StreamWriter(ErrorLog+"://MailErrorlog.txt", true, System.Text.Encoding.UTF8))
  {
   writer.WriteLine("---------------------------------------------");
   writer.WriteLine("SendEmail方法发送邮件错误日志................");
   writer.WriteLine(ex.ToString());
   writer.Flush();
   writer.Close();
  }
 }
}
#endregion
#region 获取邮件配置节点的值
/// <summary>
/// 加载相应配置文件 并按节点名称获取对应的值
/// </summary>
/// <param name="target">当前节点的名称</param>
/// <returns>返回当前节点名称所对应的值</returns>
public string GetConfigValue(string target)
{
 string configpath=System.Windows.Forms.Application.StartupPath.ToString() + "/Email.config";
 return GetConfigValue(configpath, target);
}
/// <summary>
/// 根据节点名称获取配置文件对应的值(邮件配置信息)
/// </summary>
/// <param name="configpath">配置文件路径</param>
/// <param name="target">要获取配置节点的名称</param>
/// <returns>返回当前节点名称所对应的值</returns>
public string GetConfigValue(string configpath, string target)
{
 XmlDocument doc = new XmlDocument();
 //加载文件路径s
 doc.Load(configpath);
 //获取当前节点的根节点
 XmlElement root = doc.DocumentElement;
 //获取当前节点下所有匹配子节点元素
 XmlNodeList xmlnode = root.GetElementsByTagName(target);
 //返回值
 return xmlnode[0].InnerXml;
}
#endregion
//服务结束
protected override void OnStop()
{
 time.Enabled = false;
}

<?xml version="1.0" encoding="utf-8"?>
<Emailconfig>
 <!--邮件服务器地址 Gmail stmp.gmail.com-->
 <smtpserver>*****</smtpserver>
 <!--邮箱用户名 -->
 <emailuserName>***</emailuserName>
 <!--邮箱密码-->
 <emailuserpwd>****</emailuserpwd>
 <!--邮箱地址-->
 <emailfrom>*****</emailfrom>
 <!--是否启用定时发送邮件功能-->
 <isOpen>true</isOpen>
 <!--前提下isOpen为true 定在每天某个时间点发送邮件-->
 <sendTime>8:53</sendTime>
 <!--是否经过SSL加密-->
 <SSL>false</SSL>
 <!--Gmail smtp SSL加密 (Gmail:587) 服务器端口(没有加密(SSL 配置为false) 一般都是25
(163,qq))-->
 <serverPort>25</serverPort>
 <!--线程睡眠时间-->
 <SleepTime>1000</SleepTime>
 <!--定停发送时间-->
 <stoptime>0</stoptime>
 <!--发送邮件错误日志路径 盘根目录-->
 <ErrorLog>E</ErrorLog>
 <!--定义数据库连接字符串-->
 <Connstr></Connstr>
</Emailconfig>

#region 数据库操作类的封装
public abstract class SqlHelper
{
 //Database connection strings
 public static readonly string ConnectionStringLocalTransaction = Connstr;
 // Hashtable to store cached parameters
 private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
 /*返回数据库连接*/
 public static SqlConnection getConnection()
 {
  SqlConnection c = new SqlConnection(ConnectionStringLocalTransaction);
  return c;
 }
 /// <summary>
 /// Execute a SqlCommand that returns a resultset against the database specified in the connection string 
 /// using the provided parameters.
 /// </summary>
 /// <remarks>
 /// e.g.: 
 /// SqlDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
 /// </remarks>
 /// <param name="connectionString">a valid connection string for a SqlConnection</param>
 /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
 /// <param name="commandText">the stored procedure name or T-SQL command</param>
 /// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
 /// <returns>A SqlDataReader containing the results</returns>
 public static SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
 {
  SqlCommand cmd = new SqlCommand();
  SqlConnection conn = new SqlConnection(connectionString);
  // we use a try/catch here because if the method throws an exception we want to 
  // close the connection throw code, because no datareader will exist, hence the 
  // commandBehaviour.CloseConnection will not work
  try
  {
   PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
   SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
   cmd.Parameters.Clear();
   return rdr;
  }
  catch
  {
   conn.Close();
   throw;
  }
 }
 public static DataSet ReturnDataSet(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
 {
  SqlCommand cmd = new SqlCommand();
  SqlConnection conn = new SqlConnection(ConnectionStringLocalTransaction);
  // we use a try/catch here because if the method throws an exception we want to 
  // close the connection throw code, because no datareader will exist, hence the 
  // commandBehaviour.CloseConnection will not work
  try
  {
   PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
   DataSet ds = new DataSet();
   SqlDataAdapter sda = new SqlDataAdapter(cmd);
   sda.Fill(ds);
   return ds;
  }
  catch
  {
   conn.Close();
   throw;
  }
 }
 /// <summary>
 /// Execute a SqlCommand that returns a resultset against the database specified in the connection string 
 /// using the provided parameters.
 /// </summary>
 /// <remarks>
 /// e.g.: 
 /// SqlDataReader r = ExecuteReader(SqlConnection, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
 /// </remarks>
 /// <param name="connectionString">a valid connection string for a SqlConnection</param>
 /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
 /// <param name="commandText">the stored procedure name or T-SQL command</param>
 /// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
 /// <returns>A SqlDataReader containing the results</returns>
 public static SqlDataReader ExecuteReader(SqlConnection conn, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
 {
  SqlCommand cmd = new SqlCommand();
  // we use a try/catch here because if the method throws an exception we want to 
  // close the connection throw code, because no datareader will exist, hence the 
  // commandBehaviour.CloseConnection will not work
  try
  {
   PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
   SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
   cmd.Parameters.Clear();
   return rdr;
  }
  catch
  {
   conn.Close();
   throw;
  }
 }
 /// <summary>
 /// Execute a SqlCommand that returns a resultset against the database specified in the connection string 
 /// using the provided parameters.
 /// </summary>
 /// <remarks>
 /// e.g.: 
 /// SqlDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
 /// </remarks>
 /// <param name="connectionString">a valid connection string for a SqlConnection</param>
 /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
 /// <param name="commandText">the stored procedure name or T-SQL command</param>
 /// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
 /// <returns>A SqlDataReader containing the results</returns>
 public static SqlDataReader ExecuteReader(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
 {
  SqlCommand cmd = new SqlCommand();
  SqlConnection conn = new SqlConnection(ConnectionStringLocalTransaction);
  // we use a try/catch here because if the method throws an exception we want to 
  // close the connection throw code, because no datareader will exist, hence the 
  // commandBehaviour.CloseConnection will not work
  try
  {
   PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
   SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
   cmd.Parameters.Clear();
   return rdr;
  }
  catch
  {
   conn.Close();
   throw;
  }
 }
 /// <summary>
 /// add parameter array to the cache
 /// </summary>
 /// <param name="cacheKey">Key to the parameter cache</param>
 /// <param name="cmdParms">an array of SqlParamters to be cached</param>
 public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters)
 {
  parmCache[cacheKey] = commandParameters;
 }
 /// <summary>
 /// Retrieve cached parameters
 /// </summary>
 /// <param name="cacheKey">key used to lookup parameters</param>
 /// <returns>Cached SqlParamters array</returns>
 public static SqlParameter[] GetCachedParameters(string cacheKey)
 {
  SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];
  if (cachedParms == null)
   return null;
  SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
  for (int i = 0, j = cachedParms.Length; i < j; i++)
   clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();
  return clonedParms;
 }
 /// <summary>
 /// Prepare a command for execution
 /// </summary>
 /// <param name="cmd">SqlCommand object</param>
 /// <param name="conn">SqlConnection object</param>
 /// <param name="trans">SqlTransaction object</param>
 /// <param name="cmdType">Cmd type e.g. stored procedure or text</param>
 /// <param name="cmdText">Command text, e.g. Select * from Products</param>
 /// <param name="cmdParms">SqlParameters to use in the command</param>
 private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
 {
  if (conn.State != ConnectionState.Open)
   conn.Open();
  cmd.Connection = conn;
  cmd.CommandText = cmdText;
  if (trans != null)
   cmd.Transaction = trans;
  cmd.CommandType = cmdType;
  if (cmdParms != null)
  {
   foreach (SqlParameter parm in cmdParms)
    cmd.Parameters.Add(parm);
  }
 }
 /// <summary>
 /// 传入输入参数
 /// </summary>
 /// <param name="ParamName">存储过程名称</param>
 /// <param name="DbType">参数类型</param></param>
 /// <param name="Size">参数大小</param>
 /// <param name="Value">参数值</param>
 /// <returns>新的 parameter 对象</returns>
 public static SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value)
 {
  return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
 }
 public void MakeInParam(ref string OldString, string ParamName, SqlDbType DbType, int Size, object Value)
 {
  OldString = OldString.Replace(ParamName, (string)Value);
 }
 /// <summary>
 /// 传入返回值参数
 /// </summary>
 /// <param name="ParamName">存储过程名称</param>
 /// <param name="DbType">参数类型</param>
 /// <param name="Size">参数大小</param>
 /// <returns>新的 parameter 对象</returns>
 public static SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size)
 {
  return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null);
 }
 /// <summary>
 /// 传入返回值参数
 /// </summary>
 /// <param name="ParamName">存储过程名称</param>
 /// <param name="DbType">参数类型</param>
 /// <param name="Size">参数大小</param>
 /// <returns>新的 parameter 对象</returns>
 public static SqlParameter MakeReturnParam(string ParamName, SqlDbType DbType, int Size)
 {
  return MakeParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null);
 }
 /// <summary>
 /// 生成存储过程参数
 /// </summary>
 /// <param name="ParamName">存储过程名称</param>
 /// <param name="DbType">参数类型</param>
 /// <param name="Size">参数大小</param>
 /// <param name="Direction">参数方向</param>
 /// <param name="Value">参数值</param>
 /// <returns>新的 parameter 对象</returns>
 public static SqlParameter MakeParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value)
 {
  SqlParameter param;
  if (Size > 0)
   param = new SqlParameter(ParamName, DbType, Size);
  else
   param = new SqlParameter(ParamName, DbType);
  param.Direction = Direction;
  if (!(Direction == ParameterDirection.Output && Value == null))
   param.Value = Value;
  return param;
 }
 /// <summary>
 /// 创建 SqlCommand 对象实例(用来返回一个整数值)  
 /// </summary>
 /// <param name="storedProcName">存储过程名</param>
 /// <param name="parameters">存储过程参数</param>
 /// <returns>SqlCommand 对象实例</returns>
 private static SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
 {
  SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
  command.Parameters.Add(new SqlParameter("ReturnValue",
   SqlDbType.Int, 4, ParameterDirection.ReturnValue,
   false, 0, 0, string.Empty, DataRowVersion.Default, null));
  return command;
 }
 /// <summary>
 /// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
 /// </summary>
 /// <param name="connection">数据库连接</param>
 /// <param name="storedProcName">存储过程名</param>
 /// <param name="parameters">存储过程参数</param>
 /// <returns>SqlCommand</returns>
 private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
 {
  SqlCommand command = new SqlCommand(storedProcName, connection);
  command.CommandType = CommandType.StoredProcedure;
  foreach (SqlParameter parameter in parameters)
  { 
   command.Parameters.Add(parameter);
  }
  return command;
 }
 #region 执行查询语句 返回dataset
 /// <summary>
 /// 执行查询语句，返回DataSet
 /// </summary>
 /// <param name="cmdText">查询语句</param>
 /// <returns>DataSet</returns>
 public static DataSet GetDataSet(string cmdText)
 {
  using (SqlConnection conn = new SqlConnection(ConnectionStringLocalTransaction))
  {
   SqlCommand sqlcmd = new SqlCommand(cmdText, conn);
   sqlcmd.CommandTimeout = 1000;
   SqlDataAdapter cmd = new SqlDataAdapter(sqlcmd);
   DataSet ds = new DataSet();
   try
   {
    conn.Open();
    cmd.Fill(ds, "mydt");
    return ds;
   }
   catch (Exception ex)
   {
    conn.Close();
    cmd.Dispose();
    conn.Dispose();
    throw new Exception(ex.Message);
   }
   finally
   {
    cmd.Dispose();
    conn.Close();
    conn.Dispose();
   }
  }
 }
 #endregion
}
#endregion