MSCOMM控件问题 本人最近在用MSCOMM控件写一个串口通信的程序,像波特率,校验位这些都用组合框做的,希望用户在选择后能传入到该控件的SetSettings属性中。但是老是传不进去,希望大虾给点解决的方法。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 这样说下很难让人明白问题所在啊。是不是直接给控件联系变量,然后又忘记调用UpdateData()? 不会,我刚写的程序,就是你的这种情况。 我的程序可以。你首先给各个组合框添加CBN_SELCHANGE事件相应函数:---------------------------------------------------------------------void CLMS291Dlg::OnSelchangeComname() { // TODO: Add your control notification handler code here SettingChanged(); }void CLMS291Dlg::OnSelchangeBaud() { // TODO: Add your control notification handler code here SettingChanged(); }void CLMS291Dlg::OnSelchangeDataBit() { // TODO: Add your control notification handler code here SettingChanged(); }void CLMS291Dlg::OnSelchangeParity() { // TODO: Add your control notification handler code here SettingChanged(); }void CLMS291Dlg::OnSelchangeStopBit() { // TODO: Add your control notification handler code here SettingChanged(); }---------------------------------------------------------------------void CLMS291Dlg::SettingChanged(){ if (m_ctrlCOMName.SetCurSel(m_ctrlCOMName.GetCurSel()) == CB_ERR || m_ctrlBaud.SetCurSel(m_ctrlBaud.GetCurSel()) == CB_ERR || m_ctrlDataBit.SetCurSel(m_ctrlDataBit.GetCurSel()) == CB_ERR || m_ctrlParity.SetCurSel(m_ctrlParity.GetCurSel()) == CB_ERR || m_ctrlStopBit.SetCurSel(m_ctrlStopBit.GetCurSel()) == CB_ERR) { ::AfxMessageBox("error occur in SettingChanged()"); return ; } if (m_ctrlComm.GetPortOpen()) //opened { this->UpdateData(TRUE); //读取内容 if (m_szCOMName.IsEmpty() || m_szParity.IsEmpty() || m_szDataBit.IsEmpty() || m_szStopBit.IsEmpty() || m_szBaud.IsEmpty()) { ::AfxMessageBox("请设置好通信参数"); return ; } CString szSetting; szSetting = m_szBaud + ","; CString parity; if (m_szParity == "None") parity = "n"; else if (m_szParity == "Odd") parity = "o"; else if (m_szParity == "Even") parity = "e"; else if (m_szParity == "Mark") parity = "m"; else if (m_szParity == "Space") parity = "s"; else { ::AfxMessageBox("请设置好校验方式"); parity = "n"; return ; } szSetting += parity + ","; szSetting += m_szDataBit + ","; szSetting += m_szStopBit; //::AfxMessageBox(szSetting); if (m_szCOMName == "COM1" || m_szCOMName == "COM2") { m_ctrlComm.SetPortOpen(FALSE); //先关闭 if (m_szCOMName == "COM1") m_ctrlComm.SetCommPort(1); if (m_szCOMName == "COM2") m_ctrlComm.SetCommPort(2); } else { ::AfxMessageBox("COM端口不对"); //m_ctrlComm.SetPortOpen(FALSE); return ; } m_ctrlComm.SetPortOpen(TRUE); //打开串口 //m_szStatus = "打开"; this->UpdateData(FALSE); m_ctrlComm.SetSettings(szSetting); m_ctrlComm.SetInputMode(1); //1:表示以二进制方式检取数据 m_ctrlComm.SetRThreshold(1); //为1表示有一个字符引发一个事件 m_ctrlComm.SetSThreshold(1); //参数1表示每当串口接收缓冲区中有 //多于或等于1个字符时将引发一个接收数据的OnComm事件 m_ctrlComm.SetInputLen(0); //设置当前接收区数据长度为0 m_ctrlComm.GetInput(); //先预读缓冲区以清除残留数据 //m_ctrlComm.SetInBufferSize(16); //设置输入缓冲区的大小,Bytes //m_ctrlComm.SetOutBufferSize(16); //设置输入缓冲区的大小,Bytes } else { this->UpdateData(TRUE); //读取内容 }} 按照楼上的方法能编译通过,但是debug时好像不能观察端口号和其他的设置阿 关于判断ListCtrl滚动条是否到底部的问题 vc6打sp6补丁,语言版本是根据操作系统的选,还是根据vc6的语言选呢? IE7 tab切换的时候ocx控件是什么状态? 求助!痛苦中。。。关于SDK 如何在程序中安全的删除u盘。 请问有谁知道防止窗口闪烁 求<<windows核心编程>>的配套光盘 如何在VC中使用VB所寫的ActiveX dll? 主要問題是如何生成vb所寫dll的接口文件,在線等。。。 请教,系统托盘图标问题 to:xyzhao()&oldfarmer(老弯弯) 分已经给出 你们来登记! 怎样用函数画正圆? SOCKET的多线程编程问题
是不是直接给控件联系变量,然后又忘记调用UpdateData()?
---------------------------------------------------------------------
void CLMS291Dlg::OnSelchangeComname()
{
// TODO: Add your control notification handler code here
SettingChanged();
}void CLMS291Dlg::OnSelchangeBaud()
{
// TODO: Add your control notification handler code here
SettingChanged();
}void CLMS291Dlg::OnSelchangeDataBit()
{
// TODO: Add your control notification handler code here
SettingChanged();
}void CLMS291Dlg::OnSelchangeParity()
{
// TODO: Add your control notification handler code here
SettingChanged();
}void CLMS291Dlg::OnSelchangeStopBit()
{
// TODO: Add your control notification handler code here
SettingChanged();
}
---------------------------------------------------------------------
void CLMS291Dlg::SettingChanged()
{
if (m_ctrlCOMName.SetCurSel(m_ctrlCOMName.GetCurSel()) == CB_ERR ||
m_ctrlBaud.SetCurSel(m_ctrlBaud.GetCurSel()) == CB_ERR ||
m_ctrlDataBit.SetCurSel(m_ctrlDataBit.GetCurSel()) == CB_ERR ||
m_ctrlParity.SetCurSel(m_ctrlParity.GetCurSel()) == CB_ERR ||
m_ctrlStopBit.SetCurSel(m_ctrlStopBit.GetCurSel()) == CB_ERR)
{
::AfxMessageBox("error occur in SettingChanged()");
return ;
} if (m_ctrlComm.GetPortOpen()) //opened
{
this->UpdateData(TRUE); //读取内容
if (m_szCOMName.IsEmpty() || m_szParity.IsEmpty() ||
m_szDataBit.IsEmpty() || m_szStopBit.IsEmpty() ||
m_szBaud.IsEmpty())
{
::AfxMessageBox("请设置好通信参数");
return ;
}
CString szSetting;
szSetting = m_szBaud + ",";
CString parity;
if (m_szParity == "None")
parity = "n";
else if (m_szParity == "Odd")
parity = "o";
else if (m_szParity == "Even")
parity = "e";
else if (m_szParity == "Mark")
parity = "m";
else if (m_szParity == "Space")
parity = "s";
else
{
::AfxMessageBox("请设置好校验方式");
parity = "n";
return ;
}
szSetting += parity + ",";
szSetting += m_szDataBit + ",";
szSetting += m_szStopBit;
//::AfxMessageBox(szSetting); if (m_szCOMName == "COM1" ||
m_szCOMName == "COM2")
{
m_ctrlComm.SetPortOpen(FALSE); //先关闭
if (m_szCOMName == "COM1") m_ctrlComm.SetCommPort(1);
if (m_szCOMName == "COM2") m_ctrlComm.SetCommPort(2);
}
else
{
::AfxMessageBox("COM端口不对");
//m_ctrlComm.SetPortOpen(FALSE);
return ;
}
m_ctrlComm.SetPortOpen(TRUE); //打开串口
//m_szStatus = "打开";
this->UpdateData(FALSE);
m_ctrlComm.SetSettings(szSetting);
m_ctrlComm.SetInputMode(1); //1:表示以二进制方式检取数据
m_ctrlComm.SetRThreshold(1); //为1表示有一个字符引发一个事件
m_ctrlComm.SetSThreshold(1); //参数1表示每当串口接收缓冲区中有
//多于或等于1个字符时将引发一个接收数据的OnComm事件
m_ctrlComm.SetInputLen(0); //设置当前接收区数据长度为0
m_ctrlComm.GetInput(); //先预读缓冲区以清除残留数据
//m_ctrlComm.SetInBufferSize(16); //设置输入缓冲区的大小,Bytes
//m_ctrlComm.SetOutBufferSize(16); //设置输入缓冲区的大小,Bytes
}
else
{
this->UpdateData(TRUE); //读取内容
}
}