使用c#直接拖串列埠控制元件serialPort1 設定屬性即可。

</pre><p></p><p></p><pre name="code" class="cpp">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;
<span style="color:#ff0000;">using System.IO.Ports;</span>


namespace Adc_Display
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            serialPort1.DataReceived += new SerialDataReceivedEventHandler(PortDataReceivedEvent);                  //新增串列埠資料接受事件
            System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;                                   //
        }

        private void PortDataReceivedEvent(object sender, SerialDataReceivedEventArgs args)                         //串列埠資料接收
        {
<span style="color:#ff0000;">            byte Data = (byte)serialPort1.ReadByte();                                                               //讀串列埠接收位元組，
            progressBar1.Value = Data;                                                                              //進度條賦值，顯示進度條刻度</span>
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (serialPort1.IsOpen)                                                                                 //判斷
            {
                groupBox2.Visible = false;                                                                          //第二個框框可見
                this.Size = new Size(620, 117);                                                                     //縮小
                serialPort1.Close();                                                                                //此處可不加try，catch
                button1.Text = "開啟串列埠";
            }
            else
            {
                try
                {
                    serialPort1.PortName = comboBox1.Text;                                                         //串列埠號
                    serialPort1.Open();                                                                            //開啟
                    groupBox2.Visible = true;                                                                      //第二個框框可見
                    this.Size = new Size(620, 172);                                                                //放大
                    button1.Text = "關閉串列埠";                                                                     //按鍵標題
                }
                catch
                {
                    MessageBox.Show("串列埠開啟錯誤", "錯誤");
                }

            }
        }
    }
}
 

效果如圖：