简单串口通讯_参数设置

using System;

using System.Collections.Generic;

using https://www.360docs.net/doc/ec7287687.html,ponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace 串口通讯

{

public partial class frmDataExchange : Form

{

public frmDataExchange()

{

InitializeComponent();

}

private void frmDataExchange_Load(object sender, EventArgs e)

{

int index;

int count = 1;

for (int i = 1; i <= 10; i++)

{

this.cboxCOM.Items.Add("COM" + i);

}

for (int i = 1; i < 10; i++)

{

index = count * 300;

this.cboxBaudRate.Items.Add(index);

count *= 2;

}

this.cboxCOM.SelectedIndex = 0;

this.cboxBaudRate.SelectedIndex = 0;

this.txtSend.Enabled = false;

this.txtRecieve.Enabled = false;

this.btnSend.Enabled = false;

}

private void cboxCOM_SelectedIndexChanged(object sender, EventArgs e)

{

this.spDataExchange.PortName = this.cboxCOM.Text;

}

private void cboxBaudRate_SelectedIndexChanged(object sender, EventArgs e) {

this.spDataExchange.BaudRate = int.Parse(this.cboxBaudRate.Text);

}

private void btnOpen_Click(object sender, EventArgs e)

{

try

{

if (btnOpen.Text == "打开串口")

{

btnOpen.Text = "关闭串口";

this.spDataExchange.Open();

MessageBox.Show("已经打开串口");

this.txtSend.Enabled = true;

this.txtRecieve.Enabled = true;

this.txtSend.Enabled = true;

}

else

{

btnOpen.Text = "打开串口";

this.spDataExchange.Close();

MessageBox.Show("已经关闭串口");

}

}

catch (Exception ex)

{

MessageBox.Show(ex.ToString());

}

}

private void btnSend_Click(object sender, EventArgs e)

{

try

{

if (txtSend.Text == string.Empty)

{

MessageBox.Show("输入的字符串不能为空");

txtSend.Focus();

}

else

{

this.spDataExchange.WriteLine(txtSend.Text);

txtSend.Text = "";

txtSend.Focus();

}

}

catch (Exception ex)

{

MessageBox.Show(ex.ToString());

}

}

private void spDataExchange_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)

{

txtRecieve.Text += spDataExchange.ReadExisting();

}

}

}