c#怎样画出像任务管理器那样的线

[cgstian]

想画出那样动态变化的线，根据传进来的数据，曲线进行变化

[北京的雾霾天]

可以参考一下下面的代码：

		public Form1()
		{
			InitializeComponent();
            this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw, true);
		}
		private PerformanceCounter _oPerformanceCounter;
		private Queue<float> queue;
		protected override void OnLoad(EventArgs e)
		{
			base.OnLoad(e);
			this._oPerformanceCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
			this.queue = new Queue<float>();
			Timer timer = new Timer();
			timer.Interval = 200;
			timer.Tick += new EventHandler(timer_Tick);
			timer.Start();
		}

		void timer_Tick(object sender, EventArgs e)
		{
			float _nVal = _oPerformanceCounter.NextValue();
			this.queue.Enqueue(_nVal);
			if (this.queue.Count > 50)
			{
				this.queue.Dequeue();
			}
			this.Invalidate();
		}
		protected override void OnPaint(PaintEventArgs e)
		{
			base.OnPaint(e);
			if (this.queue.Count > 1)
			{
				float[] fa = this.queue.ToArray();

				for (int i = 1; i < fa.Length; i++)
				{
					e.Graphics.DrawLine(SystemPens.ControlText, i * 5, this.ClientRectangle.Height - fa[i] * this.ClientRectangle.Height / 100, (i - 1) * 5, this.ClientRectangle.Height - fa[i - 1] * this.ClientRectangle.Height / 100);
				}
			}
		}
		protected override void OnFormClosed(FormClosedEventArgs e)
		{
			base.OnFormClosed(e);
			_oPerformanceCounter.Dispose();
		}
...

[jinjazz]

代码参考

http://www.codeproject.com/KB/miscctrl/SimplePerfChart.aspx

[cgstian]

一楼的大哥我QQ304903797，可以详细讲讲么？

[xuyiazl]

[Dobzhansky]

jinjazz 那个不错
另外, SmartThreadPool 那个文件的源码里头也有一个类似的控件

[Dobzhansky]

xuyiazl:
STP = SmartThreadPool
^_^

[xuyiazl]

SmartThreadPool 的开源包里有UsageControl

[月光下的土豆]

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