C#、ASP.NET汎用拡張ツール類のLogicSugar

性能面では1000サイクルも許容できる普通のSwitchは0.001秒、拡張関数は0.002秒で、大項目であれば負荷均衡がある場合は完全に無視でき、小項目でもこの性能にこだわることはありません.
注意「SyntacticSugar」を参照してください
使用方法:

//【Switch】
string bookKey = "c#";
 
//    
string myBook = "";
switch (bookKey)
{
  case "c#":
    myBook = "asp.net  ";
    break;
  case "java":
    myBook = "java  ";
    break;
  case "sql":
    myBook = "mssql  ";
    break;
  default:
    myBook = "    ";
    break;//    break   ,   ?
}
 
//    
myBook =bookKey.Switch().Case("c#", "asp.net  ").Case("java", "java  ").Case("sql", "sql  ").Default("    ").Break();//    
 
 
 
 
/**
   C#       ，  mvc razor   ? 、&&    ||         ,         ，        ，                 。
 
 */
 
bool isSuccess = true;
 
//【IIF】
//    
var trueVal1 = isSuccess ? 100 :0;
//    
var trueVal2 = isSuccess.IIF(100);
 
//    
var str = isSuccess ? "  true" : "";
//    
var str2 = isSuccess.IIF("  true");
 
 
//    
var trueVal3 = isSuccess ? 1 : 2;
//    
var trueVal4 = isSuccess.IIF(1, 2);
 
 
 
string id = "";
string id2 = "";
 
//    
isSuccess = (id == id2) && (id != null && Convert.ToInt32(id) > 0);
//    
isSuccess = (id == id2).And(id != null, Convert.ToInt32(id) > 0);
 
//    
isSuccess = id != null || id != id2;
//    
isSuccess = (id != null).Or(id != id2);

ソース:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace SyntacticSugar
{
  /// 

  /// **   ：          
  /// **     ：2015-6-1
  /// **     ：-
  /// **   ：sunkaixuan
  /// 
  public static class LogicSugarExtenions
  {
    /// 

    ///        ，            。
    /// 
    /// 
    /// 
    ///   true   trueValue
    ///   false   falseValue
    /// 
    public static T IIF(this bool thisValue, T trueValue, T falseValue)
    {
      if (thisValue)
      {
        return trueValue;
      }
      else
      {
        return falseValue;
      }
    }
 
 
    /// 

    ///        ,true  trueValue,false  string.Empty;
    /// 
    /// 
    /// 
    ///   true   trueValue
    /// 
    public static string IIF(this bool thisValue, string trueValue)
    {
      if (thisValue)
      {
        return trueValue;
      }
      else
      {
        return string.Empty;
      }
    }
 
 
 
    /// 

    ///        ,true  trueValue,false  0
    /// 
    /// 
    /// 
    ///   true   trueValue
    /// 
    public static int IIF(this bool thisValue, int trueValue)
    {
      if (thisValue)
      {
        return trueValue;
      }
      else
      {
        return 0;
      }
    }
 
 
    /// 

    ///        ，            。
    /// 
    /// 
    /// 
    ///   true   trueValue
    ///   false   falseValue
    /// 
    public static T IIF(this bool? thisValue, T trueValue, T falseValue)
    {
      if (thisValue == true)
      {
        return trueValue;
      }
      else
      {
        return falseValue;
      }
    }
 
 
 
    /// 

    ///     true，   true    false
    /// 
    /// 
    /// 
    /// 
    public static bool And(this bool thisValue, params bool[] andValues)
    {
      return thisValue && !andValues.Where(c => c == false).Any();
    }
 
 
    /// 

    ///        true,   true    false
    /// 
    /// 
    /// 
    /// 
    public static bool Or(this bool thisValue, params bool[] andValues)
    {
      return thisValue || andValues.Where(c => c == true).Any();
    }
 
 
    /// 

    /// Switch().Case().Default().Break()
    /// 
    /// 
    /// 
    /// 
    public static SwitchSugarModel Switch(this T thisValue)
    {
      var reval = new SwitchSugarModel();
      reval.SourceValue = thisValue;
      return reval;
 
    }
 
    public static SwitchSugarModel Case(this SwitchSugarModel switchSugar, T caseValue, TReturn returnValue)
    {
      if (switchSugar.SourceValue.Equals(caseValue))
      {
        switchSugar.IsEquals = true;
        switchSugar.ReturnVal = returnValue;
      }
      return switchSugar;
    }
 
    public static SwitchSugarModel Default(this SwitchSugarModel switchSugar, TReturn returnValue)
    {
      if (switchSugar.IsEquals == false)
        switchSugar.ReturnVal = returnValue;
      return switchSugar;
    }
 
    public static dynamic Break(this SwitchSugarModel switchSugar)
    {
      string reval = switchSugar.ReturnVal;
      switchSugar = null;//    ,    
      return reval;
    }
 
    public class SwitchSugarModel
    {
      public T SourceValue { get; set; }
      public bool IsEquals { get; set; }
      public dynamic ReturnVal { get; set; }
    }
 
  }
 
 
}