摘要:[C#] FTP 控制
參考：http://msdn2.microsoft.com/zh-tw/library/system.net.ftpwebrequest(VS.80).aspx
下列程式碼範例將示範如何刪除 FTP 伺服器上的檔案
刪除 FTP 伺服器上的檔案
public static bool DeleteFileOnServer(Uri serverUri)...{
// The serverUri parameter should use the ftp:// scheme. // It contains the name of the server file that is to be deleted. // Example: ftp://contoso.com/someFile.txt. // if (serverUri.Scheme != Uri.UriSchemeFtp)
...{ return false;
} // Get the object used to communicate with the server. FtpWebRequest request =(FtpWebRequest)WebRequest.Create(serverUri); request.Method = WebRequestMethods.Ftp.DeleteFile; FtpWebResponse response = (FtpWebResponse) request.GetResponse(); Console.WriteLine("Delete status: ...{0}",response.StatusDescription); response.Close(); return true;
}
下列程式碼範例將示範如何使用 WebClient 類別，從 FTP 伺服器下載檔案
使用 WebClient 類別，從 FTP 伺服器下載檔案//下列程式碼範例將示範如何使用 WebClient 類別，從 FTP 伺服器下載檔案。public static bool DisplayFileFromServer(Uri serverUri)
...{ // The serverUri parameter should start with the ftp:// scheme. if (serverUri.Scheme != Uri.UriSchemeFtp) ...{ return false; } // Get the object used to communicate with the server. WebClient request = new WebClient(); // This example assumes the FTP site uses anonymous logon. request.Credentials = new NetworkCredential ("anonymous","janeDoe@contoso.com");
try ...{ byte [] newFileData = request.DownloadData (serverUri.ToString());
string fileString = System.Text.Encoding.UTF8.GetString(newFileData);
Console.WriteLine(fileString); } catch (WebException e) ...{ Console.WriteLine(e.ToString()); } return true;}
下列程式碼範例將示範如何使用非同步作業，將檔案上載至 FTP 伺服器
使用非同步作業，將檔案上載至 FTP 伺服器using ...System;using System.Net;using System.Threading;using System.IO;namespace Examples.System.Net...{ public class FtpState ...{ private ManualResetEvent wait; private FtpWebRequest request; private string fileName; private Exception operationException = null; string status; public FtpState() ...{ wait = new ManualResetEvent(false); } public ManualResetEvent OperationComplete ...{ get ...{return wait;} } public FtpWebRequest Request ...{ get ...{return request;} set ...{request = value;} } public string FileName ...{ get ...{return fileName;} set ...{fileName = value;} } public Exception OperationException ...{ get ...{return operationException;} set ...{operationException = value;} } public string StatusDescription ...{ get ...{return status;} set ...{status = value;} } } public class AsynchronousFtpUpLoader ...{ // Command line arguments are two strings: // 1. The url that is the name of the file being uploaded to the server. // 2. The name of the file on the local machine. // public static void Main(string[] args) ...{ // Create a Uri instance with the specified URI string. // If the URI is not correctly formed, the Uri constructor // will throw an exception. ManualResetEvent waitObject; Uri target = new Uri (args[0]); string fileName = args[1]; FtpState state = new FtpState(); FtpWebRequest request = (FtpWebRequest)WebRequest.Create(target); request.Method = WebRequestMethods.Ftp.UploadFile; // This example uses anonymous logon. // The request is anonymous by default; the credential does not have to be specified. // The example specifies the credential only to // control how actions are logged on the server. request.Credentials = new NetworkCredential ("anonymous","janeDoe@contoso.com"); // Store the request in the object that we pass into the // asynchronous operations. state.Request = request; state.FileName = fileName; // Get the event to wait on. waitObject = state.OperationComplete; // Asynchronously get the stream for the file contents. request.BeginGetRequestStream( new AsyncCallback (EndGetStreamCallback), state ); // Block the current thread until all operations are complete. waitObject.WaitOne(); // The operations either completed or threw an exception. if (state.OperationException != null) ...{ throw state.OperationException; } else ...{ Console.WriteLine("The operation completed - ...{0}", state.StatusDescription); } } private static void EndGetStreamCallback(IAsyncResult ar) ...{ FtpState state = (FtpState) ar.AsyncState; Stream requestStream = null; // End the asynchronous call to get the request stream. try ...{ requestStream = state.Request.EndGetRequestStream(ar); // Copy the file contents to the request stream. const int bufferLength = 2048; byte[] buffer = new byte[bufferLength]; int count = 0; int readBytes = 0; FileStream stream = File.OpenRead(state.FileName); do ...{ readBytes = stream.Read(buffer, 0, bufferLength); requestStream.Write(buffer, 0, readBytes); count += readBytes; } while (readBytes != 0); Console.WriteLine ("Writing ...{0} bytes to the stream.", count); // IMPORTANT: Close the request stream before sending the request. requestStream.Close(); // Asynchronously get the response to the upload request. state.Request.BeginGetResponse( new AsyncCallback (EndGetResponseCallback), state ); } // Return exceptions to the main application thread. catch (Exception e) ...{ Console.WriteLine("Could not get the request stream."); state.OperationException = e; state.OperationComplete.Set(); return; } } // The EndGetResponseCallback method // completes a call to BeginGetResponse. private static void EndGetResponseCallback(IAsyncResult ar) ...{ FtpState state = (FtpState) ar.AsyncState; FtpWebResponse response = null; try ...{ response = (FtpWebResponse) state.Request.EndGetResponse(ar); response.Close(); state.StatusDescription = response.StatusDescription; // Signal the main application thread that // the operation is complete. state.OperationComplete.Set(); } // Return exceptions to the main application thread. catch (Exception e) ...{ Console.WriteLine ("Error getting response."); state.OperationException = e; state.OperationComplete.Set(); } } }}
