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关于接口与抽象类的感悟
当有属性需要给外部实现时使用抽象类比接口更好;
1 using KPIWebAPI.ViewModels; 2 3 namespace KPIWebApi.Utils 4 { 5 interface ICanAssembleFormula 6 { 7 KPIFormula AssembleFormula(); 8 } 9 }
1 using KPIWebApi.Utils; 2 using KPIWebAPI.ViewModels; 3 4 namespace XKPI.Utils 5 { 6 public abstract class AbsAssembleFormula : ICanAssembleFormula 7 { 8 public int KPI_ID; 9 public AbsAssembleFormula(int kpiid) { KPI_ID = kpiid; } 10 public abstract KPIFormula AssembleFormula(); 11 } 12 }
1 using System.Collections.Generic; 2 using System.Linq; 3 using KPIWebAPI.ViewModels; 4 using XKPI.Models; 5 using KPIWebAPI.Models; 6 7 namespace XKPI.Utils 8 { 9 class UPDemo : AbsAssembleFormula 10 { 11 public UPDemo(int kpiid):base(kpiid) { } 12 public override KPIFormula AssembleFormula() 13 { 14 using (var db = new KPIContext()) 15 { 16 EP_KPI_SET body = db.EP_KPI_SET.FirstOrDefault(r => r.KPI_ID == KPI_ID); 17 List <EP_KPI_PARAM> list = db.EP_KPI_PARAM.Where(r => r.KPI_ID == KPI_ID).ToList(); 18 return new KPIFormula(body, list); 19 } 20 } 21 } 22 }
假如只提供接口给外部,接口方法 KPIFormula AssembleFormula();就需要传参kpiid变成KPIFormula AssembleFormula(kpiid);外部类实现的时候就体现不出封装;
1 using IronPython.Hosting; 2 using KPIWebApi.Utils; 3 using KPIWebAPI.ViewModels; 4 using Microsoft.Scripting.Hosting; 5 using System; 6 using System.Collections.Generic; 7 using XKPI.Utils; 8 9 namespace KPIWebAPI.Utils 10 { 11 public class UsingPython 12 { 13 ScriptEngine engine ; 14 ScriptScope scope ; 15 ScriptSource source; 16 private UsingPython() { } 17 18 /// <summary> 19 /// 传参公式字符串初始化引擎 20 /// </summary> 21 /// <param name="ScriptString"></param> 22 23 protected UsingPython(string ScriptString) 24 { 25 engine = Python.CreateEngine(); 26 scope = engine.CreateScope(); 27 source = engine.CreateScriptSourceFromString(ScriptString); 28 } 29 30 /// <summary> 31 /// 传参公式实体初始化引擎 32 /// </summary> 33 /// <param name="formula"></param> 34 public UsingPython(KPIFormula formula) : this(formula.KPIScript) 35 { 36 37 } 38 39 public UsingPython(AbsAssembleFormula ican) : this(ican.AssembleFormula()) 40 { 41 42 } 43 44 45 46 public object ExcuteScriptString(string pyContent, List<Param> paramList) 47 { 48 try 49 { 50 var engine = Python.CreateEngine(); 51 var scope = engine.CreateScope(); 52 var source = engine.CreateScriptSourceFromString(pyContent); 53 foreach (var item in paramList) 54 { 55 scope.SetVariable(item.Name, item.FixValue); 56 } 57 source.Execute(scope); 58 return scope.GetVariable("result").ToString(); 59 } 60 catch (Exception ex) 61 { 62 throw ex; 63 } 64 } 65 66 public object ExcuteScriptFile(List<Param> paramList) 67 { 68 try 69 { 70 scope.SetVariable("result", ""); 71 foreach (var item in paramList) 72 { 73 if (item.FixValue=http://www.mamicode.com/=null) 74 { 75 scope.SetVariable(item.Code.Trim(), 0); 76 //throw new Exception(item.Code.Trim()+" is null"); 77 } 78 else 79 { 80 scope.SetVariable(item.Code.Trim(), item.FixValue); 81 } 82 83 } 84 source.Execute(scope); 85 return scope.GetVariable("result").ToString(); 86 } 87 catch (Exception ex) 88 { 89 throw ex; 90 } 91 } 92 93 /// <summary> 94 /// 简要传参数,执行KPI算法 95 /// </summary> 96 /// <param name="paramList"></param> 97 /// <returns></returns> 98 public object ExcuteScriptFile(List<SimpleParam> paramList) 99 { 100 try 101 { 102 scope.SetVariable("result", ""); 103 foreach (var item in paramList) 104 { 105 if (item.FixValue =http://www.mamicode.com/= null) 106 { 107 throw new Exception(item.Code.Trim() + " is null"); 108 } 109 scope.SetVariable(item.Code.Trim(), item.FixValue); 110 } 111 source.Execute(scope); 112 return scope.GetVariable("result").ToString(); 113 } 114 catch (Exception ex) 115 { 116 throw ex; 117 } 118 } 119 120 121 public string GetDemo() { 122 return @"using System; 123 using System.Collections.Generic; 124 using System.Linq; 125 using System.Text; 126 using System.Threading.Tasks; 127 using KPIWebAPI.ViewModels; 128 using XKPI.Models; 129 using KPIWebAPI.Models; 130 131 namespace XKPI.Utils 132 { 133 class UPDemo : AbsAssembleFormula 134 { 135 public UPDemo(int kpiid):base(kpiid) { } 136 public override KPIFormula AssembleFormula() 137 { 138 using (var db = new KPIContext()) 139 { 140 EP_KPI_SET body = db.EP_KPI_SET.FirstOrDefault(r => r.KPI_ID == KPI_ID); 141 List <EP_KPI_PARAM> list = db.EP_KPI_PARAM.Where(r => r.KPI_ID == KPI_ID).ToList(); 142 return new KPIFormula(body, list); 143 } 144 } 145 } 146 } 147 "; 148 } 149 } 150 }
关于接口与抽象类的感悟
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