图表绘制事件

Question

下面是我正在运行的代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Drawing;

namespace ChartTeste
{
    public partial class Form1 : Form
    {
        Graphics g;

        public Form1()
        {
            InitializeComponent();
            chart1.ChartAreas["Triangulos"].AxisY.Minimum = 0;
            chart1.ChartAreas["Triangulos"].AxisY.Maximum = 40;
            chart1.ChartAreas["Triangulos"].AxisX.Minimum = 0;
            chart1.ChartAreas["Triangulos"].AxisX.Maximum = 5;
            g = chart1.CreateGraphics();
        }

        private void chart1_Paint(object sender, PaintEventArgs e)
        {
            Paint();
        }

        private void Paint()
        {
            Pen p = new Pen(Brushes.Red);
                chart1.Series["PreçoT"].Points.AddXY(1, 0);

                double posiX = chart1.ChartAreas["Triangulos"].AxisX.ValueToPixelPosition(1);
                double posiY = chart1.ChartAreas["Triangulos"].AxisY.ValueToPixelPosition(13);
                double posiY2 = chart1.ChartAreas["Triangulos"].AxisY.ValueToPixelPosition(16);
                double max = chart1.ChartAreas["Triangulos"].AxisY.ValueToPixelPosition(19);
                double min = chart1.ChartAreas["Triangulos"].AxisY.ValueToPixelPosition(10);


                Point[] points = { new Point(Convert.ToInt32(posiX - 20), Convert.ToInt32(posiY)), new Point(Convert.ToInt32(posiX + 20), Convert.ToInt32(posiY)), new Point(Convert.ToInt32(posiX + 20), Convert.ToInt32(posiY2)) };

                g.DrawLine(p,Convert.ToInt32(posiX),Convert.ToInt32(min),Convert.ToInt32(posiX),Convert.ToInt32(max));
                g.FillPolygon(Brushes.Red, points);
        }
    }
}

当我运行它时，生成的三角形不是固定的，而是闪烁和故障。有什么方法可以停止油漆事件后，它产生三角形？

任何帮助都是非常感谢的。

Answer 1

要停止闪烁，请将this.DoubleBuffered = true;添加到窗体的构造函数中。

为了每隔X分钟重新绘制表单，在timer tick事件中添加Invalidate(true); (我假设您有计时器)。

Answer 2

this.SetStyle(ControlStyles.UserPaint, true);
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);