简单的工厂模式

浅浅的花香味﹌ 2021-10-16 00:54 216阅读 0赞

![2012072916080856.png][]

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] btnCalc\_Click

private void btnCalc_Click(object sender, EventArgs e)
            {
                double total = 0.0d;
                string ctypeStr = icmbCtype.SelectedItem.ToString();
                css = DXSLFactory.CashFactory.CreateCashSuper(ctypeStr);
                double d = css.AcceptCash(double.Parse(txtMoney.Text)) * Convert.ToDouble(txtNumber.Text);
                total = total + d;
                listBoxControl1.Items.Add(string.Format("单价:{0}     数量:{1}      合计：{2} ", txtMoney.Text, txtNumber.Text, total));
            }

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] CashFactory

public class CashFactory
        {
            /// <summary>
            /// 根据条件返回相应对象
            /// </summary>
            /// <param name="ctype"></param>
            /// <returns></returns>
            public static DXSLCashSuper.CashSuper CreateCashSuper(string ctype)
            {
                DXSLCashSuper.CashSuper css = null;
                switch (ctype)
                {
                    case "正常收费":
                        CashNormal csn = new CashNormal();
                        css = csn;
                        break;
                    case "满300返100":
                        CashRetrun csrt = new CashRetrun("300", "100");
                        css = csrt;
                        break;
                    case "打8折":
                        CashRebate csrb = new CashRebate("0.8");
                        css = csrb;
                        break;
                }
                return css;
            }
        }

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] 现金收取父类CashSuper

/// <summary>
        /// 现金收取父类
        /// </summary>
        public abstract class CashSuper
        {
            /// <summary>
            /// 抽象方法，收取现金
            /// </summary>
            /// <param name="money">原价，返回为当前价格</param>
            /// <returns></returns>
            public abstract double AcceptCash(double money);
        }

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] 正常收费CashNormal ，继承CashSuper

/// <summary>
        /// 正常收费，继承CashSuper
        /// </summary>
        public class CashNormal : CashSuper
        {
            public override double AcceptCash(double money)
            {
                return money;
            }
        }

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] 打折收费CashRebate ，继承CashSuper

/// <summary>
        /// 打折收费，继承CashSuper
        /// </summary>
        public class CashRebate : CashSuper
        {
            private double moneyRebate = 1d;
            public CashRebate(string moneyRebate)
            {
                this.moneyRebate = double.Parse(moneyRebate);
            }
            public override double AcceptCash(double money)
            {
                return money * moneyRebate;
            }
        }

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] 返利收费CashRetrun ，继承CashSuper

/// <summary>
        /// 返利收费，继承CashSuper
        /// </summary>
        public class CashRetrun : CashSuper
        {
            private double moneyCondition = 0d;
            private double moneyReturn = 0d;
    
            public CashRetrun(string moneyCondition, string moneyReturn)
            {
                this.moneyCondition = double.Parse(moneyCondition);
                this.moneyReturn = double.Parse(moneyReturn);
            }
            public override double AcceptCash(double money)
            {
                double result = money;
                if (money >= moneyCondition)
                    result = money - Math.Floor(money / moneyCondition) * moneyReturn;
                return result;
            }
        }

![2012072916191112.png][]

![2012072916214776.png][]

转载于:https://www.cnblogs.com/-ShiL/archive/2012/07/29/Star\_201207291622.html

[2012072916080856.png]: /images/20211015/cb766c7575ae499d979677c4bf79ee61.png
[ContractedBlock.gif]: https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
[ExpandedBlockStart.gif]: /images/20211015/7376853201e04fca9a50b0c37481bf4b.png
[2012072916191112.png]: /images/20211015/43f43ff5825b416c84176e886f20556f.png
[2012072916214776.png]: /images/20211015/ca30cfdcb2f74d289269e642e2443397.png