[新手]帮忙纠正这个涉及到对象的调用的代码

Question

帮忙纠正这个代码，涉及到对象的调用，不会..>_<
<%@page language="C#" runat="server" Debug="true"%>
<script runat="server">
 public class Car
 {
    private string color;
    private int gear;
    private int ignition;
    private Engine engine;    public Engine objEngine
    {
      get
      {
         return engine;
       }
      set
      {
         engine=value;
       }
    }
    
    public void Engine(string Name, int Rpm, string SerialNo)
    {
       name=Name;
       rpm=Rpm;
       serialno=SerialNo;
     }
    
    public static int Count
    {
        get
        {
           return count;
         }
     }
     public string Color
     {
        get
        {
           return color;
         }
         set 
         {
           color=value;
         }
     }
     
     public int Gear
     {
        get
        {
           return gear;
         }
     }
          public void ChangeGear(int direction)
     {
        if(direction<0)gear-=1;
        if(direction>0)gear+=1;
        if(gear>5)gear=5;
        if(gear<-1)gear=-1;
     }
     
     public void ChangeGear(string direction)
     {
       if(direction.ToLower()=="down")
       {
         ChangeGear(-1);
       }
       if(direction.ToLower()=="up")
       {
         ChangeGear(+1);
       }
     }
          public void SwitchOn(string Name)
     {
        if(Name==JayEngine)
        {
        return "The engine is running.";
         }
      else
      {
        return "The engine is not running.";
      }
  
   }
     public void Page_Load()
  {
     Car ShumaCar=new Car();
     ShumaCar.objEngine=new Engine("Xeer, 070,V6");
     
     Engine AlexEngine=new Engine("Ferrari, 050, V10");
     Engine RobEngine=new Engine("Fdd, 060, V3");
     Engine MyEngine=new Engine("Xeer, 070,V6");
     
     JayEngine=ShumaCar.MyEngine.Name;
     JayEngine=ShumaCar.MyEngine.SwitchOn();
          Response.Write("<b>New object 'ShumaCar' created.</b>");
     
     Response.Write("<br/>Color:"+ShumaCar.Color);
     Response.Write("<br/>Gear:" +ShumaCar.Gear);
     
     ShumaCar.Color="Black";
     ShumaCar.ChangeGear(+1);
     Response.Write("<br/><b>Properties updated.</b>");
     
     Response.Write("<br/>Color:" +ShumaCar.Color);
     Response.Write("<br/>New gear:"+ShumaCar.Gear);
     
     ShumaCar.Color="Black";
     ShumaCar.ChangeGear(+1);
     Response.Write("<br/><b>Properties updated.</b>");
     
     Response.Write("<br/>Color:" +ShumaCar.Color);
     Response.Write("<br/>New gear:"+ShumaCar.Gear);
     
     ShumaCar.ChangeGear("Up");
     Response.Write("<br/><b>Shifted 'up' one gear.</b>");
     Response.Write("<br/>New gear:"+ShumaCar.Gear);
     
     
     
     
     Response.Write("<hr>Attempting to start ShumaCar with AlexEngine:");
     ShumaCar.MyEngine(AlexEngine);
     Response.Write(MyCar.IsRunning);
     
     Response.Write("<hr>Attempting to start ShumaCar with RobEngine:");
     ShumaCar.MyEngine(RobEngine);
     Response.Write(ShumaCar.IsRunning);
    
     Response.Write("<hr>Attempting to start ShumaCar with MyEngine:");
     ShumaCar.MyEngine(MyEngine);
     Response.Write(ShumaCar.IsRunning);
     Response.Write("<br/>Attempting to stop ShumaCar:");
     ShumaCar.EngineOff();
     Response.Write(ShumaCar.IsRunning);
  }
 
</script>
    

Answer 1

car对象调用engine对象,如果engine的配置等于我车的引擎配置"Xeer, 070,V6",汽车就开动,我的代码有错误,请帮忙纠正阿

Answer 2

 public void Engine(string Name, int Rpm, string SerialNo) 
    { 
      name=Name; 
      rpm=Rpm; 
      serialno=SerialNo; 
    } 
 
有问题，
既然 有 
 private Engine engine;     public Engine objEngine 
    { 
      get 
      { 
        return engine; 
      } 
      set 
      { 
        engine=value; 
      } 
    } 
那就证明你在别的地方定义了 Engine 类，
但是这里又不论类的写个类的构造函数 public void Engine(string Name, int Rpm, string SerialNo) （还写错了）；
应该把 方法  public void Engine(string Name, int Rpm, string SerialNo) 
放到 定义Engine类的地方，并且去掉void.

Answer 3

 编译错误
说明: 在编译向该请求提供服务所需资源的过程中出现错误。请检查下列特定错误详细信息并适当地修改源代码。编译器错误消息: CS0117: “ASP.aspnet_engine_object_aspx.Car”并不包含“MyEngine”的定义源错误:行 112:     Engine MyEngine=new Engine("Xeer", "070","V6");
行 113:     
行 114:     AlexEngine=ShumaCar.MyEngine.Name;
行 115:     RobEngine=ShumaCar.MyEngine.Name;
行 116:     MyEngine=ShumaCar.MyEngine.Name;
修改以后还是不行啊，这个代码应该怎么改？？？<%@page language="C#" runat="server" Debug="true"%>
<script runat="server">
public class Engine
{
     private string name;
     private string rpm;
     private string serialno;
     
       public Engine(string Name, string Rpm, string SerialNo)//如果这里有参数名称,那么实例化一个engine的时候也要在括号内表明参数名称(并非参数)
       {
          name=Name;
          rpm=Rpm;
          serialno=SerialNo;
       }     public void SwitchOn()
     {
        if(Name=="Xeer" && Rpm=="070" && SerialNo=="V6")
        {
        return "The engine is running.";
         }
      else
      {
        return "The engine is not running.";
      }    }
}
 public class Car
 {
    private string color;
    private int gear;
    private int ignition;
    private Engine engine;    public Engine objEngine
    {
      get
      {
         return engine;
       }
      set
      {
         engine=value;
       }
    }
        
    public static int Count
    {
        get
        {
           return count;
         }
     }
     public string Color
     {
        get
        {
           return color;
         }
         set 
         {
           color=value;
         }
     }
     
     public int Gear
     {
        get
        {
           return gear;
         }
     }
          public void ChangeGear(int direction)
     {
        if(direction<0)gear-=1;
        if(direction>0)gear+=1;
        if(gear>5)gear=5;
        if(gear<-1)gear=-1;
     }
     
     public void ChangeGear(string direction)
     {
       if(direction.ToLower()=="down")
       {
         ChangeGear(-1);
       }
       if(direction.ToLower()=="up")
       {
         ChangeGear(+1);
       }
     }
     
  
   }
     public void Page_Load()
  {
     Car ShumaCar=new Car();
     
     ShumaCar.objEngine=new Engine("Xeer", "070","V6");     Engine AlexEngine=new Engine("Ferrari", "050", "V10");
     Engine RobEngine=new Engine("Fdd", "060", "V3");
     Engine MyEngine=new Engine("Xeer", "070","V6");
     
     AlexEngine=ShumaCar.MyEngine.Name;
     RobEngine=ShumaCar.MyEngine.Name;
     MyEngine=ShumaCar.MyEngine.Name;
     
          Response.Write("<b>New object 'ShumaCar' created.</b>");
     
     Response.Write("<br/>Color:"+ShumaCar.Color);
     Response.Write("<br/>Gear:" +ShumaCar.Gear);
     
     ShumaCar.Color="Black";
     ShumaCar.ChangeGear(+1);
     Response.Write("<br/><b>Properties updated.</b>");
     
     Response.Write("<br/>Color:" +ShumaCar.Color);
     Response.Write("<br/>New gear:"+ShumaCar.Gear);
     
     ShumaCar.Color="Black";
     ShumaCar.ChangeGear(+1);
     Response.Write("<br/><b>Properties updated.</b>");
     
     Response.Write("<br/>Color:" +ShumaCar.Color);
     Response.Write("<br/>New gear:"+ShumaCar.Gear);
     
     ShumaCar.ChangeGear("Up");
     Response.Write("<br/><b>Shifted 'up' one gear.</b>");
     Response.Write("<br/>New gear:"+ShumaCar.Gear);
     
     
     
     
     Response.Write("<hr>Attempting to start ShumaCar with AlexEngine:");
     ShumaCar.MyEngine("Ferrari", "050", "V10");
     Response.Write(ShumaCar.MyEngine.SwitchOn);
     
     Response.Write("<hr>Attempting to start ShumaCar with RobEngine:");
     ShumaCar.MyEngine(RobEngine);
     Response.Write(ShumaCar.MyEngine.SwitchOn);
    
     Response.Write("<hr>Attempting to start ShumaCar with MyEngine:");
     ShumaCar.MyEngine(MyEngine);
     Response.Write(ShumaCar.MyEngine.SwitchOn);
     Response.Write("<br/>Attempting to stop ShumaCar:");
  }
 
</script>
    

Answer 4

把Engine 字段构造成属性再访问public class Engine 
{ 
    private string name; //构造成属性
    private string rpm; 
    private string serialno; 
    
      public Engine(string Name, string Rpm, string SerialNo)//如果这里有参数名称,那么实例化一个engine的时候也要在括号内表明参数名称(并非参数) 
      { 
          name=Name; 
          rpm=Rpm; 
          serialno=SerialNo; 
      }     public void SwitchOn() 
    { 
        if(Name=="Xeer" && Rpm=="070" && SerialNo=="V6") 
        { 
        return "The engine is running."; 
        } 
      else 
      { 
        return "The engine is not running."; 
      }     } 
} 

Answer 5

怎样构造成属性？？
<%@page language="C#" runat="server" Debug="true"%>
<script runat="server">
public class Engine
{
     private string name;
     private string rpm;
     private string serialno;
     
       public Engine(string Name, string Rpm, string SerialNo)
       {
          name=Name;
          rpm=Rpm;
          serialno=SerialNo;
       }
    public static string Name//是不是这样？不行啊
    {
        get
        {
           return name;
         }
     }
    public static string Rpm
    {
        get
        {
           return rpm;
         }
     }
    public static string SerialNo
    {
        get
        {
           return serialno;
         }
     }

Answer 6

Engine MyEngine=new Engine("Xeer", "070","V6"); 
行 113:    
行 114:    AlexEngine=ShumaCar.MyEngine.Name; 上边的Name是Engine实例MyEngine的属性,
而MyEngine又是ShumaCar的属性
so
 
先构造Engine属性,如第一行代码,再将它赋给ShumaCar的MyEngine属性
之后再使用ShumaCar.MyEngine.Name

Answer 7

怎么构造Engine属性？？如何将它赋给ShumaCar的MyEngine属性？？请赐教

Answer 8

ShumaCar
里只有一个objEngine

Answer 9

ShumaCar.objEngine=new Engine("Xeer, 070,V6"); 
    
    Engine AlexEngine=new Engine("Ferrari, 050, V10");  这样的地方，你都要ShumaCar.objEngine==new Engine("Ferrari, 050, V10");这样来
    Engine RobEngine=new Engine("Fdd, 060, V3"); 
    Engine MyEngine=new Engine("Xeer, 070,V6"); 调用的时候都是
ShumaCar.objEngine。Name

Answer 10

编译器错误消息: CS0117: “ASP.aspnet_engine_object_aspx.Car”并不包含“MyEngine”的定义<%@page language="C#" runat="server" Debug="true"%>
<script runat="server">
public class Engine
{
    private string name;
    private string rpm;
    private string serialno;
    private string Name2;
   
      public Engine(string Name, string Rpm, string SerialNo)//如果这里有参数名称,那么实例化一个engine的时候也要在括号内表明参数名称(并非参数)
      {
          name=Name;
          rpm=Rpm;
          serialno=SerialNo;
      }    public void SwitchOn()
    {
        if(Name=="Xeer" && Rpm=="070" && SerialNo=="V6")
        {
        return "The engine is running.";
        }
      else
      {
        return "The engine is not running.";
      }    }
}
public class Car
{
    private string color;
    private int gear;
    private int ignition;
    private Engine engine;    public Engine objEngine
    {
      get
      {
        return engine;
      }
      set
      {
        engine=value;
      }
    }
      
    public static int Count
    {
        get
        {
          return count;
        }
    }
    public string Color
    {
        get
        {
          return color;
        }
        set
        {
          color=value;
        }
    }
   
    public int Gear
    {
        get
        {
          return gear;
        }
    }
       public void ChangeGear(int direction)
    {
        if(direction <0)gear-=1;
        if(direction>0)gear+=1;
        if(gear>5)gear=5;
        if(gear <-1)gear=-1;
    }
   
    public void ChangeGear(string direction)
    {
      if(direction.ToLower()=="down")
      {
        ChangeGear(-1);
      }
      if(direction.ToLower()=="up")
      {
        ChangeGear(+1);
      }
    }
   
 
  }
    public void Page_Load()
  {
    Car ShumaCar=new Car();
    Engine AlexEngine=new Engine("Ferrari", "050", "V10");
    Engine RobEngine=new Engine("Fdd", "060", "V3");
    Engine MyEngine=new Engine("Xeer", "070", "V6");
    
    ShumaCar.objEngine=new Engine("Xeer", "070","V6");    ShumaCar.objEngine=new Engine("Ferrari", "050", "V10");
    ShumaCar.objEngine=new Engine("Fdd", "060", "V3");
    ShumaCar.objEngine=new Engine("Xeer", "070", "V6");
      
       Response.Write(" <b>New object 'ShumaCar' created. </b>");
   
    Response.Write(" <br/>Color:"+ShumaCar.Color);
    Response.Write(" <br/>Gear:" +ShumaCar.Gear);
   
    ShumaCar.Color="Black";
    ShumaCar.ChangeGear(+1);
    Response.Write(" <br/> <b>Properties updated. </b>");
   
    Response.Write(" <br/>Color:" +ShumaCar.Color);
    Response.Write(" <br/>New gear:"+ShumaCar.Gear);
   
    ShumaCar.Color="Black";
    ShumaCar.ChangeGear(+1);
    Response.Write(" <br/> <b>Properties updated. </b>");
   
    Response.Write(" <br/>Color:" +ShumaCar.Color);
    Response.Write(" <br/>New gear:"+ShumaCar.Gear);
   
    ShumaCar.ChangeGear("Up");
    Response.Write(" <br/> <b>Shifted 'up' one gear. </b>");
    Response.Write(" <br/>New gear:"+ShumaCar.Gear);
   
   
   
   
    Response.Write(" <hr>Attempting to start ShumaCar with AlexEngine:");
    ShumaCar.MyEngine("Ferrari", "050", "V10");
    Response.Write(ShumaCar.MyEngine.SwitchOn);
   
    Response.Write(" <hr>Attempting to start ShumaCar with RobEngine:");
    ShumaCar.MyEngine(RobEngine);
    Response.Write(ShumaCar.MyEngine.SwitchOn);
   
    Response.Write(" <hr>Attempting to start ShumaCar with MyEngine:");
    ShumaCar.MyEngine(MyEngine);
    Response.Write(ShumaCar.MyEngine.SwitchOn);
    Response.Write(" <br/>Attempting to stop ShumaCar:");
  }</script>
    

Answer 11

上面那个问题解决了，现在还有几个问题：
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(147,5): error CS1502: 与“System.Web.HttpResponse.Write(string)”最匹配的重载方法具有一些无效参数
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(147,20): error CS1503: 参数“1”: 无法从“void”转换为“string”
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(151,29): error CS0119: “ASP.aspnet_engine_object_aspx.Car.MyEngine()”是一个“方法”，这在给定的上下文中无效
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(155,29): error CS0119: “ASP.aspnet_engine_object_aspx.Car.MyEngine()”是一个“方法”，这在给定的上下文中无效
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(21,9): error CS0127: 由于“ASP.aspnet_engine_object_aspx.Engine.SwitchOn(string, string, string)”返回 void，返回关键字后面不得有对象表达式
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(25,9): error CS0127: 由于“ASP.aspnet_engine_object_aspx.Engine.SwitchOn(string, string, string)”返回 void，返回关键字后面不得有对象表达式
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(29,9): error CS0127: 由于“ASP.aspnet_engine_object_aspx.Engine.SwitchOn(string, string, string)”返回 void，返回关键字后面不得有对象表达式
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(53,11): error CS1002: 应输入 ;
c:\inetpub\wwwroot\ASPNET\engine_object.aspx(64,18): error CS0103: 当前上下文中不存在名称“count”帮忙啊,高手呢??
<%@page language="C#" runat="server" Debug="true"%>
<script runat="server">
public class Engine
{
    private string name;
    private string rpm;
    private string serialno;
    private string Name2;
 
      public Engine(string Name, string Rpm, string SerialNo)//如果这里有参数名称,那么实例化一个engine的时候也要在括号内表明参数名称(并非参数)
      {
          name=Name;
          rpm=Rpm;
          serialno=SerialNo;
      }    public  void SwitchOn(string Name, string Rpm, string SerialNo)
    {
        if(Name=="Xeer" && Rpm=="070" && SerialNo=="V6")
        {
        return "The engine is running.";
        }
      else if(Name=="Ferrari" && Rpm=="050" && SerialNo=="V10")
      {
        return "The engine is not running.";
      }
      else if(Name=="Fdd" && Rpm=="060" && SerialNo=="V3")
      {
        return "The engine is not running.";
      }
    }
}
public class Car
{
    private string color;
    private int gear;
    private int ignition;
    private Engine engine;    public Engine objEngine
    {
      get
      {
        return engine;
      }
      set
      {
        engine=value;
      }
    }
  public  void MyEngine()
  {
      get
      {
          return engine;
        }
    } 
    public static int Count
    {
        get
        {
          return count;
        }
    }
    public string Color
    {
        get
        {
          return color;
        }
        set
        {
          color=value;
        }
    }
 
    public int Gear
    {
        get
        {
          return gear;
        }
    }
     public void ChangeGear(int direction)
    {
        if(direction <0)gear-=1;
        if(direction>0)gear+=1;
        if(gear>5)gear=5;
        if(gear <-1)gear=-1;
    }
 
    public void ChangeGear(string direction)
    {
      if(direction.ToLower()=="down")
      {
        ChangeGear(-1);
      }
      if(direction.ToLower()=="up")
      {
        ChangeGear(+1);
      }
    }
   }
    public void Page_Load()
  {
    Car ShumaCar=new Car();
    Engine AlexEngine=new Engine("Ferrari", "050", "V10");
    Engine RobEngine=new Engine("Fdd", "060", "V3");
    Engine MyEngine=new Engine("Xeer", "070", "V6");
   
    ShumaCar.objEngine=new Engine("Xeer", "070","V6");    Response.Write(" <b>New object 'ShumaCar' created. </b>");
 
    Response.Write(" <br/>Color:"+ShumaCar.Color);
    Response.Write(" <br/>Gear:" +ShumaCar.Gear);
 
    ShumaCar.Color="Black";
    ShumaCar.ChangeGear(+1);
    Response.Write(" <br/> <b>Properties updated. </b>");
 
    Response.Write(" <br/>Color:" +ShumaCar.Color);
    Response.Write(" <br/>New gear:"+ShumaCar.Gear);
 
    ShumaCar.Color="Black";
    ShumaCar.ChangeGear(+1);
    Response.Write(" <br/> <b>Properties updated. </b>");
 
    Response.Write(" <br/>Color:" +ShumaCar.Color);
    Response.Write(" <br/>New gear:"+ShumaCar.Gear);
 
    ShumaCar.ChangeGear("Up");
    Response.Write(" <br/> <b>Shifted 'up' one gear. </b>");
    Response.Write(" <br/>New gear:"+ShumaCar.Gear);
     Response.Write(" <hr>Attempting to start ShumaCar with AlexEngine:");    Response.Write(ShumaCar.objEngine.SwitchOn("Ferrari", "050", "V10"));
 
    Response.Write(" <hr>Attempting to start ShumaCar with RobEngine:");
    ShumaCar.objEngine=new Engine("Fdd", "060", "V3");
    Response.Write(ShumaCar.MyEngine.SwitchOn);
 
    Response.Write(" <hr>Attempting to start ShumaCar with MyEngine:");
    ShumaCar.objEngine=new Engine("Xeer", "070", "V6");
    Response.Write(ShumaCar.MyEngine.SwitchOn);
    Response.Write(" <br/>Attempting to stop ShumaCar:");
  }</script>