工作中小知识点汇总（c#）

1、OOP 实体与数据库字段转换（注意 此时实体字段必须和数据库中查询的字段列名相同）

list = ModelExtend.GetByDataTablePart<EZRate>(ds.Tables[0]);

  /// <summary>
        /// 实体和DataTable都有的数据才回给实体赋值
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="data"></param>
        /// <returns></returns>
        public static List<T> GetByDataTablePart<T>(this DataTable data) where T : class, new()
        {
            if (data != null)
            {
                List<T> list = new List<T>();

                foreach (DataRow row in data.Rows)
                {
                    T t = row.GetByDataRowPart<T>();
                    if (t != null)
                    {
                        list.Add(t);
                    }
                }
                return list;
            }
            else
                return null;
        }

 /// <summary>
        /// 实体和DataRow都有的数据才回给实体赋值
        /// </summary>
        /// <typeparam name="T">实体类型</typeparam>
        /// <param name="data">数据</param>
        /// <returns></returns>
        public static T GetByDataRowPart<T>(this DataRow data) where T : class, new()
        {
            if (data != null)
            {
                T t = new T();
                PropertyInfo[] properties = GetProperties(typeof(T));

                foreach (PropertyInfo p in properties)
                {
                    if (data.Table.Columns.Contains(p.Name))
                    {
                        object value = data[p.Name] == DBNull.Value ? p.PropertyType.Name.ToLower().Equals("string") ? string.Empty : null : data[p.Name];
                        p.SetValue(t, value, null);
                    }
                }
                return t;
            }
            else
                return null;

        }

2、重载可以用这种方式，不用写两个方法

 /// <summary>
        /// 构造产品订单映射
        /// </summary>
        /// <param name="identify">产品订单标识</param>
        /// <param name="supplier">供应商标识</param>
        /// <param name="commodity">产品标识</param>
        /// <param name="items">产品的具体项目（例如：机票）</param>
        public CommodityOrderMapping(string identify, string supplier, string commodity, IEnumerable<string> items = null, String isEmergency="0")
        {
            this.Identify = identify;
            this.Supplier = supplier;
            this.Commodity = commodity;
            this.IsEmergency = isEmergency;
            if (items != null) this._Items.AddRange(items);
        }

//订单映射
                orderMap = new OrderMapping(eco.TOrderId, eco.PurchaseCode,
                           new CommodityOrderMapping[] { new CommodityOrderMapping(eco.FOrderId, eco.SupplierCode, "C1",items: sublist, isEmergency: IsEmagenrcy) });//子订单映射

在方法中赋默认值，例如 items ,isEmergency 在调用时 用 items:sublist isEmergency:IsEmagenrcy .也可以只写 items:sublist。
总结后边两个参数可写可不写，但是必须前面加上名称例如items:sublist 必须加items。

 3、c#生成代理类

1、

2、wsdl /n:THPolicyWebService /out:E:\THPolicyWebService.cs http://b2b.test.itour.com.cn:5000/THPolicyWebService.asmx?wsdl

 

4、解析xml

 

XmlNamespaceManager xnm = new XmlNamespaceManager(xmlDoc.NameTable);
xnm.AddNamespace("rs", "http://www.opentravel.org/OTA/2003/05");
string xPath = @"/rs:OTA_AirAvailRS/rs:OriginDestinationOptions/rs:OriginDestinationOption/rs:FlightSegment[contains(@FlightNumber,'CA1861')]";
XmlNode isSuccess = xmlDoc.SelectSingleNode(xPath,xnm);
string s = isSuccess.OuterXml;

 

5、Common类

// c#弹出框
        public static void MessageBox(System.Web.UI.Page page, string msg)
        {
            msg = msg.Replace("\"", "");
            msg = msg.Replace("'", "");
            msg = msg.Replace("\r", "");
            msg = msg.Replace("\n", "");

            page.ClientScript.RegisterClientScriptBlock(page.GetType(), Guid.NewGuid().ToString(),
                "alert('" + msg + "');", true);

        }
        // c#后台写js
        public static void WriteScript(System.Web.UI.Page page, string script)
        {


            page.ClientScript.RegisterClientScriptBlock(page.GetType(), Guid.NewGuid().ToString(),
                string.Format("{0};", script), true);

        }
        // c#md5加密
        public static string Md5Compute(string txt)
        {

            MD5 md5 = MD5.Create();
            //把txt转成byte数组
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(txt);
            byte[] returnBytes = md5.ComputeHash(bytes);
            md5.Clear();
            string result = "";
            for (int i = 0; i < returnBytes.Length; i++)
            {
                //ToString中的X表示转成16进制后再转string类型,2表示两位显示,不足两位前面补0
                result += returnBytes[i].ToString("X2");

            }
            return result;



        }

 6、 单击文本框变色
        $(function () {
            $("input[type=text]").focus(function () {
                $(this).addClass("myFocus");
            }).blur(function () {
                $(this).removeClass("myFocus");
            });
        });

 7、windows服务时间控件使用

  private System.Timers.Timer timer1 = new System.Timers.Timer();
        protected override void OnStart(string[] args)
        {
          
            this.timer1.Enabled = true;
            this.timer1.Interval = 120000;
            this.timer1.Elapsed += new System.Timers.ElapsedEventHandler(timer1_Tick);
        }

        protected override void OnStop()
        {
            this.timer1.Enabled = false;
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
　　　　　　　// 填写实际的方法
　　　　 ｝