C＃对象数组CopyTo用于连接两个数组的价值观？ [英] C# Object Array CopyTo links both arrays' values?

问题描述

好吧，我有什么，我认为是一个简单的问题..或只是我是一个C＃初学者的情况。

我有我从数据库填充自定义对象（clsScriptItem）阵列。一旦项目被加载，我想将它们备份到备份数组这样我就可以改变主阵列后归回信息。然而，当我使用CopyTo从到阵列复制，然后修改原始阵列，备份阵列也被改变了......我还以为只是CopyTo从复制值+结构从一个阵列到另一个。

 私人无效backupItems（）
    {
        // lastSavedItems和物品的类型都是clsScriptItem的[]
        //（未显示声明）        lastSavedItems =新clsScriptItem [items.Length]        items.CopyTo（lastSavedItems，0）;        //items[0].nexts[0]为2
        //lastSavedItems[0].nexts[0]为2        项[0] .nexts [0] =-1;        //items[0].nexts[0] -1
        //lastSavedItems[0].nexts[0]也是-1
    }
 

如何备份这些数据，而无需两个数组被'挂'??

更新：
我已经更新了备份功能本

 私人无效backupItems（）
    {
        lastSavedItems =新clsScriptItem [items.Length]
        的for（int i = 0; I＆LT; items.Length;我++）
            lastSavedItems [I] =（clsScriptItem）项目[I] .Clone（）;        项[0] .nexts [0] =-1;    }
 

和我有更新正是如此我的课......

 公共类clsScriptItem：ICloneable
{    //其他声明...    对象ICloneable.Clone（）{返回的clone（）; }    公共clsScriptItem克隆（）
    {
        回报（（clsScriptItem）MemberwiseClone（））;
    }
}
 

** - 同样的事情正在发生。任何想法**

解决方案

 试试这个： - 公共静态的MyType [] DeepClone（的MyType [] OBJ）
     {
                使用（MemoryStream的毫秒=新的MemoryStream（））
                {
                    BinaryFormatter的格式化=新的BinaryFormatter（）;
                    formatter.Serialize（MS，OBJ）;
                    ms.Position = 0;                    返回（的MyType []）formatter.Deserialize（MS）;
                }
      }
 

Okay, I have what I think is a simple question.. or just a case of me being a C# beginner.

I have an array of custom objects (clsScriptItem) that I am populating from a database. Once the items are loaded, I want to back them up to "backup" array so I can revert the information back after changing the main array. However, when I use CopyTo to copy the array and then alter the original array, the backup array is also being altered... I thought CopyTo merely copied values + structure from one array to another.

    private void backupItems()
    {
        //lastSavedItems and items are both of type clsScriptItem[] 
        //(declaration not shown)

        lastSavedItems = new clsScriptItem[items.Length];

        items.CopyTo(lastSavedItems, 0);

        //items[0].nexts[0] is 2
        //lastSavedItems[0].nexts[0] is 2

        items[0].nexts[0] = "-1";

        //items[0].nexts[0] is -1
        //lastSavedItems[0].nexts[0] is also -1


    }

How do I backup this data without having the two arrays be 'linked'??

UPDATE : I have updated the backup function to this

    private void backupItems()
    {
        lastSavedItems = new clsScriptItem[items.Length];
        for (int i = 0; i < items.Length; i++)
            lastSavedItems[i] = (clsScriptItem)items[i].Clone();

        items[0].nexts[0] = "-1";

    }

And I have update my class thusly....

public class clsScriptItem : ICloneable 
{

    //other declarations...

    object ICloneable.Clone() { return Clone(); }

    public clsScriptItem Clone()
    {
        return ((clsScriptItem)MemberwiseClone());
    }
}

** - and the same thing is happening.. Any thoughts?**

解决方案

try this:-

public static MyType[] DeepClone(MyType[] obj)
     {
                using (MemoryStream ms = new MemoryStream())
                {
                    BinaryFormatter formatter = new BinaryFormatter();
                    formatter.Serialize(ms, obj);
                    ms.Position = 0;

                    return (MyType[])formatter.Deserialize(ms);
                }
      }

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