c#线程实现点元素随机移动

以下是使用 C# 线程实现点元素随机移动的代码实现：

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 ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Display;
using System.Threading;

namespace RandomPointMove
{
    public partial class Form1 : Form
    {
        private IMapControl3 m_pMapControl;
        private IGraphicsContainer m_pGraphicsContainer;
        private IPoint m_pPoint;
        private Thread m_pThread;
        private bool m_bRun;
        private Random m_pRandom;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            m_pMapControl = axMapControl1.Object as IMapControl3;
            m_pGraphicsContainer = m_pMapControl.Map as IGraphicsContainer;
            m_pRandom = new Random(DateTime.Now.Millisecond);
        }

        private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
        {
            if (e.button == 1)
            {
                IPoint pPoint = m_pMapControl.ToMapPoint(e.x, e.y);
                AddPointGraphic(pPoint);
            }
        }

        private void AddPointGraphic(IPoint pPoint)
        {
            m_pPoint = pPoint;
            IMarkerSymbol pMarkerSymbol = new SimpleMarkerSymbolClass();
            IRgbColor pColor = new RgbColorClass();
            pColor.Red = 255;
            pMarkerSymbol.Color = pColor;
            pMarkerSymbol.Size = 10;
            IElement pElement = new MarkerElementClass();
            pElement.Geometry = m_pPoint;
            pElement.Symbol = pMarkerSymbol;
            m_pGraphicsContainer.AddElement(pElement, 0);
            m_pMapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
            m_bRun = true;
            m_pThread = new Thread(new ThreadStart(RandomMovePoint));
            m_pThread.Start();
        }

        private void RandomMovePoint()
        {
            while (m_bRun)
            {
                double x = m_pPoint.X + m_pRandom.NextDouble() * 100 - 50;
                double y = m_pPoint.Y + m_pRandom.NextDouble() * 100 - 50;
                m_pPoint.PutCoords(x, y);
                IElement pElement = m_pGraphicsContainer.Element[0];
                pElement.Geometry = m_pPoint;
                m_pGraphicsContainer.UpdateElement(pElement);
                m_pMapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
                Thread.Sleep(100);
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            m_bRun = false;
            if (m_pThread != null && m_pThread.ThreadState == ThreadState.Running)
            {
                m_pThread.Abort();
            }
        }
    }
}

这段代码中，我们使用一个线程不断随机移动点的位置，通过设置`m_bRun`变量来控制线程的运行状态，当窗口关闭时，通过`Thread.Abort()`方法结束线程运行。