C + + Builder The use of components to transfer files

In Borland C + + builder, using the Nmstrmserv and NMSTRM components makes it easy to pass files between two computers. Of course, you can also use the FTPJ protocol based file transfer component Nmftp, but using Nmstrmserv and NMSTRM components is more convenient and quicker.

First, run Borland C + + Builder, add a Nmstrmserv component to the form Form1 and a Save dialog box component Savedialog.

Then add in the NMStrmServ1 onmsg event:

Save File dialog box
if (Savedialog1->execute ())
{
Delete if the destination file exists
if (FileExists (savedialog1->filename))
DeleteFile (Savedialog1->filename);
TFileStream *myfstream;
Create a file
Myfstream = new TFileStream (Savedialog1->filename, fmcreate);
Try
{
Myfstream->copyfrom (STRM, strm->size);
ShowMessage ("Receive success!") Save file as "+savedialog1->filename";
}
catch (...)
{
ShowMessage ("Receive failed!") ");
}
Release
Myfstream->free ();
}

In this way, a program to receive files, please do so, and then we do the file to send the program:

Run Borland C + + Builder again, adding a NMSTRM component, a OpenDialog component, a button buttons component, a label component, and an edit component on the new project's form. Change the Caption property of Button1 to "send File", change the Caption property of Label1 to "receive host:", change the Text property of Edit1 to "127.0.0.1".

Then double-click Button1 to add the code to its onclick event:

Open File dialog box
if (Opendialog1->execute ())
{
TFileStream *myfstream;
Myfstream = new TFileStream (Opendialog1->filename, Fmopenread);
Try
{
Host Name
Nmstrm1->host = edit1->text;
Nmstrm1->fromname = "Netmasters";
Send
Nmstrm1->postit (Myfstream);
ShowMessage ("file" +opendialog1->filename+) sent successfully! ");
}
catch (...)
{
ShowMessage ("File" +opendialog1->filename+) failed to send! ");
}
Myfstream->free ();
}

Code input complete, compile and run the two programs separately. Once the compilation is complete, you can open a file to the remote host by clicking the Send File button on the sending program. In this example, the default host IP address is 127.0.0.1, which is the local computer, you can also run the receiving program on other computers in the local area network, and then fill in the name or IP address of the computer in the host name of the sending program, and then open the file to send. After the send is successful, the receiving program receives the file and asks for the save file, selects the path and file name to save to save the received file.

The above program runs through the Borland C + + Builder 5.0,win98/win2000.