什么是在用户控件中配置画笔的更好方法 [英] What is better approach to dispose Brush in User Control

问题描述

在Paint事件中使用新的Brush是否是更好的方法，即

Is it better approach to use a new Brush in Paint event i.e

protected override void OnPaint(PaintEventArgs e)
    {
        e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
        using (SolidBrush b = new SolidBrush(Color.FromArgb(129, 242, 121)))
        {
            for (int i = 0; i < 12; i++)
            {
                e.Graphics.FillPath(b, path[i]);
            }
        }
        base.OnPaint(e);
    }

或一次定义一次并使用Dispose方法进行处置，即

or define once at top and dispose in Dispose Method i.e

private SolidBrush _b= null;

    private SolidBrush b
    {
        get
        {
            if (_b== null)
                return _b= new SolidBrush(Color.FromArgb(129, 242, 121));
            else
                return _b;
        }
    }

推荐答案

这完全取决于您是否要在一种以上的方法中使用同一笔刷.如果需要重用，则将其声明为类级别变量，然后将其处置在OnDispose方法中，否则只需像第一个示例中那样创建它即可.

希望对您有帮助

It all depends on whether you want to use the same brush in more than one method. If you need to reuse it then declare it as a class level variable and dispose it in OnDispose method, else just create it as in your first example.

Hope this helps

请参阅此
http://stackoverflow.com/questions/8253398/what-is-better-approach-to-dispose-brush-in-user-control [ http://stackoverflow.com/questions/1209585/when-is-dispose-necessary [ ^ ]

Refer this
http://stackoverflow.com/questions/8253398/what-is-better-approach-to-dispose-brush-in-user-control[^]
http://stackoverflow.com/questions/1209585/when-is-dispose-necessary[^]

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