关于保存文件的问题

[johilion]

我想向c;\hello.txt中不断添加文本内容hello，请问应该如何添加？如下代码为什么实现不了望指教，谢谢...
CFile fileText;
CString str="hello";
if(fileText.Open("C:\\hello.txt",CFile::modeCreate+CFile::modeNoTruncate+CFile::modeWrite))
{
fileText.Write((LPCSTR)str,strlen(str));
fileText.Close();
}

[zhouyong0371]

CFile fileText;
CString str="hello";
if(fileText.Open("C:\\hello.txt",CFile::modeCreate+CFile::modeNoTruncate+CFile::modeWrite))
{
fileText.Write((LPCSTR)str,str.GetLength()); //这里
fileText.Close();
}

[zhouyong0371]

CFile fileText;
CString str="hello";
if(fileText.Open("C:\\hello.txt",CFile::modeCreate+CFile::modeNoTruncate+CFile::modeWrite))
{
fileText.SeekToEnd();
fileText.Write((LPCSTR)str,str.GetLength());
fileText.Close();
}

[wanglh]

CFile fileText;
CString str="hello";
if(fileText.Open("C:\\hello.txt",CFile::modeCreate+CFile::modeNoTruncate+CFile::modeWrite))
{
fileText.SeekToEnd();
fileText.Write(str,str.GetLength());
fileText.Close();
}