LPVOID lParam 如何转化为CString 类型

Question

多谢

Answer 1

CString str = (LPTSTR)lParam

Answer 2

这是一个消息参数类型，因为它不知道你要传送那种类型，所以定义成lpvoid类型。
要将它转换为CString类型。首先你要确认发送过来的是CString类型数据，然后接收：
CString str = *(CString*)lParam;

Answer 3

不行吧，转成CString* 还可以的

Answer 4

看你lParam 是如何传进来的

Answer 5

if(!DownLoadFiles(&str_Filename))
......
BOOL CFtpListDialog::DownLoadFiles(LPVOID lParam)
{
CString temp_ftp_name = (LPTSTR)lParam;
AfxMessageBox(temp_ftp_name);
........
显示为乱码

Answer 6

lParam好象只能传递一个字符~~~~~~

Answer 7

CString str = *(CString*)lParam;

Answer 8

不行啊，非法错误
void CFtpListDialog::OnDblclkList1(NMHDR* pNMHDR, LRESULT* pResult) 
{
// TODO: Add your control notification handler code here
int i;
CString str_Filename;
if (( i =m_SerListFile.GetSelectedCount()) == 0)
return;
POSITION iPos = m_SerListFile.GetFirstSelectedItemPosition();
for (int j = 0 ;j< i; j++)
{
int nItem=m_SerListFile.GetNextSelectedItem(iPos);
str_Filename = m_SerListFile.GetItemText(nItem,0);         AfxMessageBox(str_Filename);
}

//CWinThread * dl_thread = AfxBeginThread(::DownLoadFunction, this);
if(!DownLoadFiles(str_Filename))
AfxMessageBox("建立文件发送线程出错");
*pResult = 0;
}BOOL CFtpListDialog::DownLoadFiles(CString sz_filename)
{
//CString *temp_ftp_name = (CString *)lParam;
//AfxMessageBox(*temp_ftp_name);
if (m_pReceiveFileThread)
{
::WaitForSingleObject(m_pReceiveFileThread->m_hThread,100);
//AfxMessageBox("Thread end");
    delete m_pReceiveFileThread;
m_pReceiveFileThread=NULL;
}
if (m_pReceiveFileThread = AfxBeginThread(::DownLoadFunction,  sz_filename,THREAD_PRIORITY_ABOVE_NORMAL,
0,CREATE_SUSPENDED,NULL))
{
m_pReceiveFileThread->m_bAutoDelete=FALSE;
m_pReceiveFileThread->ResumeThread();
//AfxMessageBox("Thread start");
return TRUE;
}
else
return FALSE;}UINT DownLoadFunction(LPVOID lParam)
{
CString temp_ftp_name = *(CString*)lParam;
AfxMessageBox(temp_ftp_name);
/*CInternetSession Cis;
CFtpConnection* m_Ftp_Conn;
try {
m_Ftp_Conn = Cis.GetFtpConnection(szFtpName,szFtpUser,szFtpPassword);
m_Ftp_Conn->SetCurrentDirectory(sz_Path);
CInternetFile*  ifp = m_Ftp_Conn->OpenFile(temp_ftp_name);
}
catch (CInternetException* pEx)
{

}*/
return 0;
}

Answer 9

如果lParam是个字符串地址,消息不是WM_SETTEXT,WM_GETTEXT而发送消息方又不在同一地址空间的话,.....,阿门!
传递全局内存的句柄吧.

Answer 10

兄弟。我是新手。不过你用MSDN查找一下CString 的用法。或者查找关键字为String这样或许你能找到些有用的东西！！

Answer 11

AfxBeginThread(::DownLoadFunction,  (LPCTSTR)sz_filename,THREAD_PRIORITY_ABOVE_NORMAL,
0,CREATE_SUSPENDED,NULL))UINT DownLoadFunction(LPVOID lParam)
{
CString temp_ftp_name = (LPCTSTR)lParam;

Answer 12

你传给DownLoadFunction(LPVOID lParam)根本就不是CString指针啊。
AfxBeginThread(::DownLoadFunction, this);－－－>你的DownLoadFunction函数的传递的内容是那个啊？？？》》

Answer 13

改成AfxBeginThread(::DownLoadFunction,  (LPCTSTR)sz_filename,THREAD_PRIORITY_ABOVE_NORMAL,
0,CREATE_SUSPENDED,NULL))
不行，编译报错

Answer 14

AfxBeginThread(::DownLoadFunction,  &sz_filename,THREAD_PRIORITY_ABOVE_NORMAL,
0,CREATE_SUSPENDED,NULL))
要不就
AfxBeginThread(::DownLoadFunction,  (lparam)(&sz_filename),THREAD_PRIORITY_ABOVE_NORMAL,
0,CREATE_SUSPENDED,NULL))

Answer 15

cannot convert from 'class CString' to 'void *'

Answer 16

void CFtpListDialog::OnDblclkList1(NMHDR* pNMHDR, LRESULT* pResult) 
{
// TODO: Add your control notification handler code here
int i;
CString str_Filename;
if (( i =m_SerListFile.GetSelectedCount()) == 0)
return;
POSITION iPos = m_SerListFile.GetFirstSelectedItemPosition();
for (int j = 0 ;j< i; j++)
{
int nItem=m_SerListFile.GetNextSelectedItem(iPos);
str_Filename = m_SerListFile.GetItemText(nItem,0);         AfxMessageBox(str_Filename);
}

//CWinThread * dl_thread = AfxBeginThread(::DownLoadFunction, this);
if(!DownLoadFiles(str_Filename))
AfxMessageBox("建立文件发送线程出错");
*pResult = 0;
}BOOL CFtpListDialog::DownLoadFiles(CString sz_filename)
{
//CString *temp_ftp_name = (CString *)lParam;
AfxMessageBox(sz_filename);
if (m_pReceiveFileThread)
{
::WaitForSingleObject(m_pReceiveFileThread->m_hThread,100);
//AfxMessageBox("Thread end");
    delete m_pReceiveFileThread;
m_pReceiveFileThread=NULL;
}
//if (m_pReceiveFileThread = AfxBeginThread(::DownLoadFunction,(LPCTSTR)sz_filename,THREAD_PRIORITY_ABOVE_NORMAL,
//0,CREATE_SUSPENDED,NULL))
if (AfxBeginThread(::DownLoadFunction, (LPVOID)(&sz_filename), THREAD_PRIORITY_ABOVE_NORMAL,
0,CREATE_SUSPENDED,NULL))
{
m_pReceiveFileThread->m_bAutoDelete=FALSE;
m_pReceiveFileThread->ResumeThread();
//AfxMessageBox("Thread start");
return TRUE;
}
else
return FALSE;}UINT DownLoadFunction(LPVOID lParam)
{

CString temp_ftp_name = (LPCTSTR)lParam; AfxMessageBox(temp_ftp_name); return 0;
}