在結構中使用代表不會修改結構內部元素

Question

我們認爲這將是一個簡單的方法來解決通過價值限制（現實生活中我們的結構有更多成員）的結構傳遞，但我們注意到使用結構內的代表不會修改結構內部成員，即使這是代表數組的唯一目的。
鑑於此委託和結構：

public delegate void ChangeValues(); 

structure Effects 
{ 
    int val1,val2,val3; 

    void SetValues(int index) 
    { 
     ChangeValues[] delegateArray = new ChangeValues(){this.SetValSet1,this.setValSet2,this.SetValSet3}; 
     delegateArray[index](); //now set the values as necessary 
    } 
    void setValSet1() 
    { 
     val1=0;val2=1;val3=2; 
    }   
    void setValSet2() 
    { 
     val1=1;val2=2;val3=3; 
    }   
    void setValSet3() 
    { 
     val1=2;val2=3;val3=4; 
    }   
} 

Effects effects = new Effects(); 
effects.SetValues(1); //when stepping through code one sees the values change inside eh setValues functions, but the modified values are gone after leaving this function 

是否使用委託會導致創建結構的另一個實例，然後失去了什麼？

Answer 1

第一：請不要發佈甚至沒有編譯的代碼（除非你問爲什麼它不編譯）。這只是浪費我們的時間。

二：是的代表似乎對結構值複製，不知道具體情況，但下面的是一個解決方案：

public delegate void ChangeValues(ref Effects a); 

public struct Effects 
{ 
    int val1,val2,val3; 

    public void SetValues(int index) 
    { 
     ChangeValues[] delegateArray = new ChangeValues[]{setValSet1,setValSet2,setValSet3}; 
     delegateArray[index](ref this); //now set the values as necessary 
    } 
    public void setValSet1(ref Effects a) 
    { 
     a.val1 = 0; a.val2 = 1; a.val3 = 2; 
    } 
    public void setValSet2(ref Effects a) 
    { 
     a.val1 = 1; a.val2 = 2; a.val3 = 3; 
    } 
    public void setValSet3(ref Effects a) 
    { 
     a.val1 = 2; a.val2 = 3; a.val3 = 4; 
    } 
    public override string ToString() 
    { 
     return val1 + "," + val2 + "," + val3; 
    } 
} 

class Program 
{ 
    static void Main(string[] args) 
    { 
     Effects effects = new Effects(); 
     Effects effects2 = new Effects(); 
     effects.SetValues(1); //when stepping through code one sees the values change inside eh setValues functions, but the modified values are gone after leaving this function 
     Console.WriteLine(effects); 
    } 
} 

它輸出：1,2,3