将无符号字符值设置为mfc中的CString类型编辑控件 [英] Set unsigned character value to CString type edit control in mfc

问题描述

在我基于MFC对话框的应用程序中，我希望通过串口读取数据以及从中接收的任何数据，显示在编辑控件中，但不知何故它不起作用，因为我使用下面的方法：

In my MFC dialogue based application, I want to Read data through serial port and whatever data received from that,displayed into Edit control,but somehow it is not working,as I used below methodology:

/*CString msg;
    msg.Format(L"%c",Buff);*/
    //strcpy( (char*)Buff,ThreadStruct->m_handleDlg->m_console);//"Hello World");
    while(1)
    {
        ReadFile(DeviceHandle,&Buff,1,&WriteBytes,NULL);
        //ThreadStruct->m_handleDlg->m_OutConsole.ReplaceSel(L"\r\n\r\n\r"+msg+L"\r\n\r\n\r");
        //ThreadStruct->m_handleDlg->m_OutConsole.SetWindowTextW(Buff);
        //ThreadStruct->m_handleDlg->m_console.Format(L"%uc",Buff);
    }

以上代码我使用了工作线程。所以使用ThreadStruct。

以上没有人正在运行，给出错误！怎么做？

for above code I used worker thread.So that used ThreadStruct.
above no one is running,gives error! How to do that?

推荐答案

你正在将一个字符（字节）读入 Buff 。因此，您无法传递 Buff ，其中预期NULL终止字符串参数而不附加NULL终止符。您的代码段还表明您正在使用Unicode构建。因此，从串行端口读取的字符必须转换为Unicode。使用 CString ，这可以通过这种方式完成（当收到的字符是纯ASCII或来自系统的ANSI代码页时）：

You are reading a single character (byte) into Buff. So you can't pass Buff where a NULL terminated string parameter is expected without appending the NULL terminator. Your code snippet indicates also that you are using a Unicode build. So the characters read from the serial port must be converted to Unicode. Using a CString, this can be done this way (when the received characters are plain ASCII or from the ANSI code page of your system):

CString msg;
// Format single ASCII/ANSI char
msg.Format(L"%hc", Buff[0]);
// Format ASCII/ANSI string after appending a NULL char
Buff[1] = 0;
msg.Format(L"%hs", Buff);

h 前缀告诉format函数该参数是ASCII / ANSI字符串或字符串，并执行转换为Unicode。

The h prefix tells the format function that the parameter is an ASCII/ANSI char or string and performs the conversion to Unicode.

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