此代码Genrat“Com”端口错误并给我Com端口信息和Sol我连接的错误Dlink Dongle使用。谢谢。 [英] This Code Genrat "Com" Port Error And Give Me Com Port Information And Sol The Error I Am Connected Dlink Dongle Use. Thanks.
本文介绍了此代码Genrat“Com”端口错误并给我Com端口信息和Sol我连接的错误Dlink Dongle使用。谢谢。的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
使用系统;
使用 System.Collections.Generic;
使用 System.ComponentModel;
使用 System.Data;
使用 System.Drawing;
使用 System.Linq;
使用 System.Text;
使用 System.Windows.Forms;
使用 System.IO.Ports;
命名空间 call_app
{
public 部分 类 Form1：表格
{
public Form1（）
{
InitializeComponent（）;
}
private void button1_Click（ object sender，EventArgs e）
{
try
{
SerialPort sp = new SerialPort（）;
sp.PortName = COM3;
sp.BaudRate = 9600 ;
sp.Parity = Parity.None;
sp.DataBits = 8 ;
sp.StopBits = StopBits.One;
sp.Handshake = Handshake.XOnXOff;
sp.DtrEnable = true ;
sp.RtsEnable = true ;
sp.Open（）;
if （！sp.IsOpen）
{
MessageBox.Show（ 未打开串口）;
return ;
}
sp.WriteLine（ AT + Environment 。新队）;
sp.WriteLine（ ATD = \ + 7600684319; + \ + Environment.NewLine）;
}
catch （异常errcatch）
{
MessageBox.Show（errcatch.Message）;
}
}
私有 void Form1_Load（ object sender，EventArgs e）
{
}
}
}
解决方案
审核完代码后，我认为您可能需要考虑以下几点：
- 在班级声明串口。
- 在表单加载处理程序中创建，初始化和打开串行端口。
- 根据调制解调器制造商的建议设置串行端口属性，而不是从其他来源复制的代码。
- 写入串口后，等待调制解调器制造商推荐的时间。
- 声明DataReceived事件的处理程序。除非您专门禁止调制解调器成功消息，否则您将能够看到应用程序与调制解调器的交互。
- 声明ErrorReceived事件的处理程序。在这里你可以确定出了什么问题。
保留这些物品请注意，这是对代码的修改：
使用系统;
使用 System.IO.Ports;
使用 System.Threading;
使用 System.Windows.Forms;
命名空间 CallApp
{
// ************************************* **************类Form1
public 部分 类 Form1：表格
{
// 在班级声明
SerialPort serial_port = null ;
// **************** ****************************** OnFormClosed
// 确保串口关闭并在末尾处理
// 应用程序
protected 覆盖 void OnFormClosed（FormClosedEventArgs e）
{
base .OnFormClosed（e）;
if （serial_port！= null ）
{
if （serial_port.IsOpen）
{
serial_port.Close（）;
}
serial_port.Dispose（）;
serial_port = null ;
}
}
// ****** ****************************************** Form1_Load
// 创建，初始化并打开表格中的串口
// 加载处理程序
private void Form1_Load（ object sender，
EventArgs e）
{
serial_port = new SerialPort（）;
serial_port.DataReceived + =
new SerialDataReceivedEventHandler（
serial_port_DataReceived）;
serial_port.ErrorReceived + =
new SerialErrorReceivedEventHandler（
serial_port_ErrorReceived）;
serial_port.PortName = COM3;
// 您必须设置以下
// 基于调制解调器的值
// 制造商推荐
// 请注意可能不是
//
serial_port.BaudRate = 9600 ;
serial_port.Parity = Parity.None;
serial_port.DataBits = 8 ;
serial_port.StopBits = StopBits.One;
serial_port.Handshake = Handshake.XOnXOff;
serial_port.DtrEnable = true ;
serial_port.RtsEnable = true ;
serial_port.NewLine = Environment.NewLine;
// 在这里打开串口
尝试
{
serial_port.Open（）;
}
catch （例外情况）
{
throw new ApplicationException（
失败打开串口 +
ex.Message + ex.StackTrace）;
}
}
// ****** Form**** 1 ***************************************** span>
public Form1（）
{
InitializeComponent（）;
}
// *********** ********************************** button1_Click
// 处理button1 Click事件
private void button1_Click（ object sender，
EventArgs e）
{
尝试
{
如果（！ serial_port.IsOpen）
{
MessageBox.Show（ 串口未打开，
串口错误）;
return ;
}
serial_port.WriteLine（ AT）;
Thread.Sleep（ 1000 ）;
serial_port.WriteLine（ ATD = \ +
7600684319; +
\）;
Thread.Sleep（ 1000 ）;
}
catch （Exception ex）
{
MessageBox.Show（ex.Message + ex.StackTrace）;
}
}
// ****** **************************** serial_port_DataReceived
// 处理DataReceived事件
private void serial_port_DataReceived（
object sender，
SerialDataReceivedEventArgs e）
{
string received_string = String .Empty;
SerialPort serial_port =（SerialPort）sender;
received_string = serial_port.ReadExisting（）;
MessageBox.Show（received_string，
Recieved）;
}
// *********** ********************** serial_port_ErrorReceived
// 在此处理串口错误
void serial_port_ErrorReceived（
< span class =code-keyword> object sender，
SerialErrorReceivedEventArgs e）
{
SerialPort serial_port =（SerialPort）sender;
MessageBox.Show（ Serial Port error，
错误）;
}
} // class Form1
} // 命名空间call_app
即使在COM3上没有调制解调器，也会显示以下日志：
AT
OK
ATD = 7600684319;
NO DIALTONE
希望有所帮助。
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.IO.Ports;
namespace call_app
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
try
{
SerialPort sp = new SerialPort();
sp.PortName = "COM3";
sp.BaudRate = 9600;
sp.Parity = Parity.None;
sp.DataBits = 8;
sp.StopBits = StopBits.One;
sp.Handshake = Handshake.XOnXOff;
sp.DtrEnable = true;
sp.RtsEnable = true;
sp.Open();
if (!sp.IsOpen)
{
MessageBox.Show("Serial port is not opened");
return;
}
sp.WriteLine("AT" + Environment.NewLine);
sp.WriteLine("ATD=\"" + "7600684319;" + "\"" + Environment.NewLine);
}
catch(Exception errcatch)
{
MessageBox.Show(errcatch.Message);
}
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
} 解决方案
After reviewing your code, here are a few things that I think you might want to consider:
- Declare the serial port at the class level.
- Create, initialize, and open the serial port in the form load handler.
- Set the serial port properties based upon the modem manufacturer's recommendations, not on code copied from some other source.
- After writing to the serial port, wait the amount of time recommended by the modem manufacturer.
- Declare a handler for the DataReceived event. Unless you specifically inhibit modem success messages, you will be able to see your application's interactions with the modem.
- Declare a handler for the ErrorReceived event. Here you will be able to determine what went wrong.
Keeping those items in mind, here is a rework of your code:
using System; using System.IO.Ports; using System.Threading; using System.Windows.Forms; namespace CallApp { // *************************************************** class Form1 public partial class Form1 : Form { // declare at class level SerialPort serial_port = null; // ********************************************** OnFormClosed // insure that serial port is closed and disposed at the end // of the application protected override void OnFormClosed ( FormClosedEventArgs e ) { base.OnFormClosed ( e ); if ( serial_port != null ) { if ( serial_port.IsOpen ) { serial_port.Close ( ); } serial_port.Dispose ( ); serial_port = null; } } // ************************************************ Form1_Load // create, initialize, and open the serial port in the forms // load handler private void Form1_Load ( object sender, EventArgs e ) { serial_port = new SerialPort ( ); serial_port.DataReceived += new SerialDataReceivedEventHandler ( serial_port_DataReceived ); serial_port.ErrorReceived += new SerialErrorReceivedEventHandler ( serial_port_ErrorReceived ); serial_port.PortName = "COM3"; // you must set the following // values based upon modem // manufacturer recommendation // note that some may not be // needed serial_port.BaudRate = 9600; serial_port.Parity = Parity.None; serial_port.DataBits = 8; serial_port.StopBits = StopBits.One; serial_port.Handshake = Handshake.XOnXOff; serial_port.DtrEnable = true; serial_port.RtsEnable = true; serial_port.NewLine = Environment.NewLine; // open the serial port here try { serial_port.Open ( ); } catch ( Exception ex ) { throw new ApplicationException ( "Failed to open serial port" + ex.Message + ex.StackTrace ); } } // ***************************************************** Form1 public Form1 ( ) { InitializeComponent ( ); } // ********************************************* button1_Click // handle the button1 Click event private void button1_Click ( object sender, EventArgs e ) { try { if ( !serial_port.IsOpen ) { MessageBox.Show ( "Serial port is not opened", "Serial Port Error" ); return; } serial_port.WriteLine ( "AT" ); Thread.Sleep ( 1000 ); serial_port.WriteLine ( "ATD=\"" + "7600684319;" + "\"" ); Thread.Sleep ( 1000 ); } catch ( Exception ex ) { MessageBox.Show ( ex.Message + ex.StackTrace ); } } // ********************************** serial_port_DataReceived // handle the DataReceived event private void serial_port_DataReceived ( object sender, SerialDataReceivedEventArgs e ) { string received_string = String.Empty; SerialPort serial_port = ( SerialPort ) sender; received_string = serial_port.ReadExisting ( ); MessageBox.Show ( received_string, "Recieved" ); } // ********************************* serial_port_ErrorReceived // handle serial port errors here void serial_port_ErrorReceived ( object sender, SerialErrorReceivedEventArgs e ) { SerialPort serial_port = ( SerialPort ) sender; MessageBox.Show ( "Serial Port error", "Error" ); } } // class Form1 } // namespace call_app
Even without a modem on COM3, the following log is displayed:
AT OK ATD="7600684319;" NO DIALTONE
Hope that helps.
这篇关于此代码Genrat“Com”端口错误并给我Com端口信息和Sol我连接的错误Dlink Dongle使用。谢谢。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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