发送邮件

public void SendEmail(string mailTo, string subject, string body)
{
    MailMessage mail = new MailMessage(this.EmailFrom, mailTo, subject, body);
    mail.IsBodyHtml = true;

    SmtpClient smtp = new SmtpClient();
    smtp.Host = this.SmtpHost;
    smtp.Port = this.SmtpPort;
    smtp.EnableSsl = this.SmtpSsl;

    smtp.Credentials = new NetworkCredential(this.EmailAccount, this.EmailPassword);

    smtp.Send(mail);

}

直接读取上传文件内容(不经保存)

if (uploadFile.HasFile)
{
    //读取导入帐本文件
    int fileLength = uploadFile.PostedFile.ContentLength;
    byte[] input = new byte[fileLength];
    System.IO.Stream stream = uploadFile.PostedFile.InputStream;
    stream.Read(input, 0, fileLength);
    stream.Position = 0;
    System.IO.StreamReader reader = new System.IO.StreamReader(stream, System.Text.Encoding.Default);
    string txtContent = reader.ReadToEnd();
    reader.Close();
    stream.Close();

    //保存在服务器端
    System.IO.StreamWriter writer = new System.IO.StreamWriter(Server.MapPath(filePath), false);
    writer.Write(txtContent);
    writer.Close();
}

使用匿名委托筛选泛型列表和排序

List<SH_Payment_bean> PaymentList = new List<SH_Payment_bean>();

//使用匿名委托删除所筛选列表
PaymentList.RemoveAll(
    delegate(SH_Payment_bean bean)
    {
        bean.CCBPayment = new CCBPayment();
        return string.IsNullOrEmpty(bean.fdPaymNO);
    }
);

//按fdPaymID排序
PaymentList.Sort(
    delegate(SH_Payment_bean x, SH_Payment_bean y)
    {
        if (x.fdPaymID < y.fdPaymID)
        {
            return -1;
        }
        else if (x.fdPaymID == y.fdPaymID)
        {
            return 0;
        }
        else return 1;
    }
);

ASP.Net(C#)导出csv报表文件

StringBuilder sb = new StringBuilder("商品名称,交易金额,姓名,下单人姓名/帐号,数量,交易日期");
foreach (SH_Order_bean bean in list){
    sb.AppendLine();
    sb.AppendFormat(
        "{0},{1},{2},{3},{4},{5}"
        , bean.Item0.Goods.fdGoodName
        , bean.fdOrdePayPrice.ToString("c").Replace(",", "")
        , bean.fdOrdeUserName.Replace(",", "")
        , (bean.Member.fdMembLoginID + "/" + bean.Member.fdMembName).Replace(",", "")
        , bean.Item0.fdItemQuantity
        , bean.fdOrdePayAt.ToString("yyyy-MM-dd hh:mm")
    );
}
Response.ClearHeaders();
Response.AppendHeader("Content-disposition", "attachment;filename=ExportData.csv");
Response.Write(sb.ToString());
Response.End();

volatile同步单件类

private static object lockHelper = new object();
private static volatile SmtpAgent instance = null;

public static SmtpAgent GetAgent()
{
    if (instance == null)
    {
        lock (lockHelper)
        {
            if (instance == null)
            {
                instance = new SmtpAgent();
            }
        }
    }
    return instance;

}

public static void SetInstance(SmtpAgent anInstance)
{
    if (anInstance != null)
        instance = anInstance;
}

public static void SetInstance()
{
    SetInstance(new SmtpAgent());
}

序列化当前实体对象

XmlSerializer xmlFormat = new XmlSerializer(this.GetType());

FileStream fStream = new FileStream(this.configPath, FileMode.Create, FileAccess.Write, FileShare.None);

xmlFormat.Serialize(fStream, this);

fStream.Close();