在WEB常常有人问我如何直接给file发文件呢??
通常都告诉别人可以使wscript.shell用sendkeys模拟,但是那个是没有用处的,如果仅仅是不喜欢file控件呢,可以用层把file透明了,用button结合text,两种方法具体如下:
这个是方法2:
<div style="position:absolute;top:11px;left:-71px;width:150;filter:alpha(opacity=0)" >
<input name="file" type="file" size=33 onpropertychange="a.value=this.value">
</div>
方法一是:
<script language=javascript>
function window.onload()
{
document.form1.T1.focus();
var WshShell=new ActiveXObject("WScript.Shell");
WshShell.sendKeys("c:\\test.txt"); //向文本框里发送东东
}
</script>
这并不是所有的,我以前还写过一个VB的ftp上传,做成控件定时传送的
Public Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" _
(ByVal sAgent As String, ByVal LAccessType As Long, ByVal sProxyName As String, _
ByVal SProxyBypass As String, ByVal lFlags As Long) As Long
Public Declare Function InternetConnect Lib "wininet.dll" Alias "InternetConnectA" _
(ByVal hInternetSession As Long, ByVal sServerName As String, _
ByVal nServerPort As Integer, ByVal sUsername As String, _
ByVal sPassword As String, ByVal lService As Long, _
ByVal lFlags As Long, ByVal lContext As Long) As Long
Public Declare Function FtpGetFile Lib "wininet.dll" Alias "FtpGetFileA" _
(ByVal hFtpSession As Long, ByVal lpszRemoteFile As String, _
ByVal lpszNewFile As String, ByVal fFailIfExists As Boolean, _
ByVal dwFlagsAndAttributes As Long, ByVal dwFlags As Long, _
ByVal dwContext As Long) As Boolean
Public Declare Function FtpPutFile Lib "wininet.dll" Alias "FtpPutFileA" _
(ByVal hFtpSession As Long, ByVal lpszLocalFile As String, _
ByVal lpszRemoteFile As String, ByVal dwFlags As Long, _
ByVal dwContext As Long) As Boolean
Public Declare Function FtpDeleteFile Lib "wininet.dll" Alias "FtpDeleteFileA" _
(ByVal hFtpSession As Long, ByVal lpszFileName As String) As Boolean
Public Declare Function FtpRenameFile Lib "wininet.dll" Alias "FtpRenameFileA" _
(ByVal hFtpSession As Long, ByVal lpszExsiting As String, ByVal lpszNew As String) As Boolean
Public Declare Function InternetCloseHandle Lib "wininet.dll" (ByVal hInet As Long) As Integer
Private Sub Timer1_Timer()
lnginet = InternetOpen(vbNullString, INTERNET_OPEN_TYPE_PRECONFIG, _
vbNullString, vbNullString, 0&)
If lnginet Then
lnginetconn = InternetConnect(lnginet, "210.51.180.101", 0, _
"用户名", "密码", 1, 0, 0)
If lnginetconn Then
blnrc = FtpPutFile(lnginetconn, "你的具体上传的东东", "网站的FTP的文件夹", 0, 0, 1, 0)
If blnrc Then
MsgBox "download ok!!!"
End If
InternetCloseHandle lnginetconn
InternetCloseHandle lnginet
Else
a = 1
DoEvents
End If
Else
a = 2
DoEvents
End If
End Sub
当然这个也不最后的,因为别人毕竟要得是http的上传
研究了一下发现一个好办法是用httpsendrequest函数,可以用http协议直接上传,唯一的问题是客户端要允许你注册
BOOL UseHttpSendReqEx(HINTERNET hRequest, DWORD dwPostSize)
{
INTERNET_BUFFERS BufferIn;
DWORD dwBytesWritten;
int n;
BYTE pBuffer[1024];
BOOL bRet;
BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS );
// Must be set or error will occur
BufferIn.Next = NULL;
BufferIn.lpcszHeader = NULL;
BufferIn.dwHeadersLength = 0;
BufferIn.dwHeadersTotal = 0;
BufferIn.lpvBuffer = NULL;
BufferIn.dwBufferLength = 0;
BufferIn.dwBufferTotal = dwPostSize;
// This is the only member used other than dwStructSize
BufferIn.dwOffsetLow = 0;
BufferIn.dwOffsetHigh = 0;
if(!HttpSendRequestEx( hRequest, &BufferIn, NULL, 0, 0))
{
printf( "Error on HttpSendRequestEx %d\n",GetLastError() );
return FALSE;
}
FillMemory(pBuffer, 1024, 'D'); // Fill buffer with data
bRet=TRUE;
for(n=1; n<=(int)dwPostSize/1024 && bRet; n++)
{
if(bRet=InternetWriteFile( hRequest, pBuffer, 1024, &dwBytesWritten))
printf( "\r%d bytes sent.", n*1024);
}
if(!bRet)
{
printf( "\nError on InternetWriteFile %lu\n",GetLastError() );
return FALSE;
}
if(!HttpEndRequest(hRequest, NULL, 0, 0))
{
printf( "Error on HttpEndRequest %lu \n", GetLastError());
return FALSE;
}
return TRUE;
}
这个是用VC写的,道理是相同的,可以在MSDN上查到httpsendrequest的原型,上面那个程序的难点就是把文件分割了,以便于ASP的接收 
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