使用CStdioFile删除txt文件的第一行

void DeleteTxtItem()
{
CStdioFile file;
CStringArray array;
CString strPath = g_pMainWind->GetHaitianSunTxtPath();//txt文件路径
CString str;
file.Open(strPath, CFile::modeCreate|CFile::modeReadWrite|CFile::modeNoTruncate|CFile::shareDenyNone);
while(file.ReadString(str))
{
array.Add(str + "\r\n");
}
file.Close();
file.Open(strPath, CFile::modeCreate|CFile::modeReadWrite/*|CFile::modeNoTruncate*/|CFile::shareDenyNone);
for(int i = 1; i < array.GetSize(); i++)
{
file.WriteString(array.GetAt(i));
}
file.Close();
}