C# winform ListBox实现滚动条自动滚动至底部

效果如图：

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

namespace ListBoxAutoScroll
{
    public partial class Form1 : Form
    {
        Thread[] threadArr = new Thread[20];
        bool scroll = false;
        object obj = new object();
        delegate void AddItemCallback(string text);
        public Form1()
        {
            InitializeComponent();
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            listBoxMsg.Items.Clear();
            for (int i = 0; i < threadArr.Length; i++)
            {
                if (threadArr[i] == null || threadArr[i].ThreadState == ThreadState.Aborted || threadArr[i].ThreadState == ThreadState.Stopped)
                {
                    threadArr[i] = new Thread(new ThreadStart(() => AddData(i)));
                    threadArr[i].Name = i.ToString();
                }
                threadArr[i].Start();
            }
        }
        public void AddData(int i)
        {

            while (true)
            {
                AddItem("ListBox中添加【第" + i.ToString() + "项】");
                Thread.Sleep(1000);
            }
        }
        private void AddItem(string text)
        {
            if (this.listBoxMsg.TopIndex == this.listBoxMsg.Items.Count - (int)(this.listBoxMsg.Height / this.listBoxMsg.ItemHeight))
                scroll = true;
            if (this.listBoxMsg.InvokeRequired)
            {
                AddItemCallback d = new AddItemCallback(AddItem);
                this.Invoke(d, new object[] { text });
            }
            else
            {
                this.listBoxMsg.Items.Add(text);
            }
            if (scroll)
                this.listBoxMsg.TopIndex = this.listBoxMsg.Items.Count - (int)(this.listBoxMsg.Height / this.listBoxMsg.ItemHeight);
        }

        private void btnStop_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < threadArr.Length; i++)
            {
                if (threadArr[i] != null && threadArr[i].ThreadState != ThreadState.Stopped && threadArr[i].ThreadState != ThreadState.Aborted)
                {
                    threadArr[i].Abort();
                }
            }
        }
    }
}

转载信息：

原作者：程序届卡卡罗特 

来源：CSDN 

原文：https://blog.csdn.net/u010533180/article/details/73468057
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