使用wpf C＃中的点访问2d数组

I have a 2d array of a class. The size of array is very large (around 3000*3000) and accessing the array with ordinary row and column method is taking very much time. For this purpose, I want to use pointers to access the array.

我有一个类的2d数组。数组的大小非常大(大约3000 * 3000),使用普通的行和列方法访问数组需要花费很多时间。为此,我想使用指针来访问数组。

Following is my array code:

以下是我的数组代码:

Class definition:

Class BoxData     
{
  Size _bound;
  bool _isFilled=false;
  Color _color=Colors.White;

  public Size Bounds
  {
    get
    {
      return _bound;
    }
    set
    {
      _bound=value;
    }
  }

  public bool IsFilled
  {
    get
    {
      return _isFilled;
    }
    set
    {
      _isFilled=value;
    }
  }

  public Color FillColor
  {
    get
    {
      return _color;
    }
    set
    {
      _color=value;
    }
  }
}

Class used as array in application:

在应用程序中用作数组的类:

BoxData[,] boxData=new BoxData[3000,3000];

I want to access boxData with pointers.

我想用指针访问boxData。

Thanks

2 个解决方案

#1

Try a jagged array instead of a multi dimensional one, they are faster in Microsoft's CLR implementation

尝试锯齿状阵列而不是多维阵列,它们在Microsoft的CLR实现中更快

BoxData[][] boxData=new BoxData[3000][];
for (int i=0; i<3000; i++)
    boxData[i] = new BoxData[3000];

#2

Maybe you could use a struct instead of a class for BoxData ?

也许你可以使用结构而不是BoxData的类?

Struct is a value type: as you declare your array, everything will be populated already. You will not longer use a loop to create new BoxData() instances.

Struct是一种值类型:当您声明数组时,所有内容都将被填充。您将不再使用循环来创建新的BoxData()实例。

var x = new BoxData[3000,3000]; // Populated array of BoxData

Because of struct vs class restrictions, you will have to remove initializers this way...

由于struct vs class限制,你必须以这种方式删除初始化程序...

struct BoxData
{
    Size _bound;
    bool _isFilled; // = false;
    Color _color; // = Color.White;

    public Size Bounds
    {
        get
        {
            return _bound;
        }
        set
        {
            _bound = value;
        }
    }

    public bool IsFilled
    {
        get
        {
            return _isFilled;
        }
        set
        {
            _isFilled = value;
        }
    }

    public Color FillColor
    {
        get
        {
            return _color;
        }
        set
        {
            _color = value;
        }
    }
}

...and initialize your default values using a loop will be much more faster.

...并使用循环初始化默认值会快得多。

for (int j = 0; j < 3000; j++)
    for (int i = 0; i < 3000; i++)
        x[i, j].FillColor = Color.White;

#1