C# 使用 FtpWebResponse 编写GUI 简易 FTP客户端

阳光boyer

1. using System;
   
2. using System.Collections.Generic;
   
3. using System.ComponentModel;
   
4. using System.Data;
   
5. using System.Drawing;
   
6. using System.Windows.Forms;
   
7. using System.Net;
   
8. using System.IO;
   
9. 
   
10. class FtpClientForm : Form {
    
11.     public FtpClientForm() {
    
12.         InitializeComponent();
    
13.     }
    
14. 
    
15.     private string serverDirectory;
    
16. 
    
17.     private void OnOpen(object sender, EventArgs e) {
    
18.         Cursor currentCursor = this.Cursor;
    
19.         FtpWebResponse response = null;
    
20.         Stream stream = null;
    
21.         this.Cursor = Cursors.WaitCursor;
    
22. 
    
23.         FtpWebRequest request = (FtpWebRequest)WebRequest.Create(textServer.Text);
    
24.         request.Credentials = new NetworkCredential(textUsername.Text,
    
25.               textPassword.Text);
    
26.         request.Method = WebRequestMethods.Ftp.ListDirectory;
    
27. 
    
28.         response = (FtpWebResponse)request.GetResponse();
    
29. 
    
30.         stream = response.GetResponseStream();
    
31.         FillDirectoryList(stream);
    
32. 
    
33.         serverDirectory = null;
    
34.         buttonOpenDirectory.Enabled = false;
    
35.         buttonGetFile.Enabled = false;
    
36. 
    
37.         if (response != null)
    
38.             response.Close();
    
39.         if (stream != null)
    
40.             stream.Close();
    
41.         this.Cursor = currentCursor;
    
42.     }
    
43. 
    
44.     private void FillDirectoryList(Stream stream) {
    
45.         StreamReader reader = new StreamReader(stream);
    
46.         string content = reader.ReadToEnd();
    
47.         string[] files = content.Split('\n');
    
48.         listFiles.DataSource = files;
    
49.         reader.Close();
    
50.     }
    
51. 
    
52.     private void OnOpenDirectory(object sender, EventArgs e) {
    
53.         FtpWebResponse response = null;
    
54.         Stream stream = null;
    
55.         string subDirectory = listFiles.SelectedValue.ToString().Trim();
    
56.         serverDirectory += @"/" + subDirectory;
    
57.         Uri baseUri = new Uri(textServer.Text);
    
58.         Uri uri = new Uri(baseUri, serverDirectory);
    
59. 
    
60.         FtpWebRequest request = (FtpWebRequest)WebRequest.Create(uri);
    
61.         request.Credentials = new NetworkCredential(textUsername.Text,
    
62.               textPassword.Text);
    
63. 
    
64.         request.Method = WebRequestMethods.Ftp.ListDirectory;
    
65.         response = (FtpWebResponse)request.GetResponse();
    
66. 
    
67.         stream = response.GetResponseStream();
    
68.         FillDirectoryList(stream);
    
69.         if (response != null)
    
70.             response.Close();
    
71.         if (stream != null)
    
72.             stream.Close();
    
73.     }
    
74. 
    
75.     private void OnDownloadFile(object sender, EventArgs e) {
    
76.         FtpWebResponse response = null;
    
77.         Stream inStream = null;
    
78.         Stream outStream = null;
    
79.         Uri baseUri = new Uri(textServer.Text);
    
80. 
    
81.         string filename = listFiles.SelectedValue.ToString().Trim();
    
82.         string fullFilename = serverDirectory + @"/" + filename;
    
83. 
    
84.         Uri uri = new Uri(baseUri, fullFilename);
    
85. 
    
86.         FtpWebRequest request = (FtpWebRequest)WebRequest.Create(uri);
    
87.         request.Credentials = new NetworkCredential(textUsername.Text,textPassword.Text);
    
88.         request.Method = WebRequestMethods.Ftp.DownloadFile;
    
89.         request.UseBinary = checkBoxBinary.Checked;
    
90. 
    
91.         response = (FtpWebResponse)request.GetResponse();
    
92. 
    
93.         inStream = response.GetResponseStream();
    
94. 
    
95.         saveFileDialog1.FileName = filename;
    
96. 
    
97.         if (saveFileDialog1.ShowDialog() == DialogResult.OK) {
    
98.             outStream = File.OpenWrite(saveFileDialog1.FileName);
    
99.             byte[] buffer = new byte[4096];
    
100.             int size = 0;
     
101.             while ((size = inStream.Read(buffer, 0, 4096)) > 0) {
     
102.                 outStream.Write(buffer, 0, size);
     
103.             }
     
104.         }
     
105. 
     
106.         if (inStream != null)
     
107.             inStream.Close();
     
108.         if (outStream != null)
     
109.             outStream.Close();
     
110.         if (response != null)
     
111.             response.Close();
     
112. 
     
113.     }
     
114. 
     
115.     private void OnFileSelection(object sender, EventArgs e) {
     
116.         this.buttonGetFile.Enabled = true;
     
117.         this.buttonOpenDirectory.Enabled = true;
     
118.     }
     
119.     private void InitializeComponent() {
     
120.         this.label1 = new System.Windows.Forms.Label();
     
121.         this.textServer = new System.Windows.Forms.TextBox();
     
122.         this.buttonOpen = new System.Windows.Forms.Button();
     
123.         this.statusStrip1 = new System.Windows.Forms.StatusStrip();
     
124.         this.listFiles = new System.Windows.Forms.ListBox();
     
125.         this.buttonOpenDirectory = new System.Windows.Forms.Button();
     
126.         this.buttonGetFile = new System.Windows.Forms.Button();
     
127.         this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog();
     
128.         this.checkBoxBinary = new System.Windows.Forms.CheckBox();
     
129.         this.label2 = new System.Windows.Forms.Label();
     
130.         this.label3 = new System.Windows.Forms.Label();
     
131.         this.textUsername = new System.Windows.Forms.TextBox();
     
132.         this.textPassword = new System.Windows.Forms.TextBox();
     
133.         this.SuspendLayout();
     
134.         this.label1.AutoSize = true;
     
135.         this.label1.Location = new System.Drawing.Point(28, 31);
     
136.         this.label1.Size = new System.Drawing.Size(37, 13);
     
137.         this.label1.Text = "Server:";
     
138.         this.textServer.Location = new System.Drawing.Point(109, 31);
     
139.         this.textServer.Size = new System.Drawing.Size(146, 20);
     
140.         this.textServer.Text = "ftp://";
     
141.         this.buttonOpen.Location = new System.Drawing.Point(371, 31);
     
142.         this.buttonOpen.Size = new System.Drawing.Size(103, 23);
     
143.         this.buttonOpen.Text = "Open";
     
144.         this.buttonOpen.Click += new System.EventHandler(this.OnOpen);
     
145.         this.statusStrip1.LayoutStyle = System.Windows.Forms.ToolStripLayoutStyle.Table;
     
146.         this.statusStrip1.Location = new System.Drawing.Point(0, 0);
     
147.         this.statusStrip1.Size = new System.Drawing.Size(496, 18);
     
148.         this.statusStrip1.Text = "statusStrip1";
     
149.         this.listFiles.FormattingEnabled = true;
     
150.         this.listFiles.Location = new System.Drawing.Point(28, 149);
     
151.         this.listFiles.Size = new System.Drawing.Size(315, 160);
     
152.         this.listFiles.SelectedIndexChanged += new System.EventHandler(this.OnFileSelection);
     
153.         this.buttonOpenDirectory.Enabled = false;
     
154.         this.buttonOpenDirectory.Location = new System.Drawing.Point(371, 77);
     
155.         this.buttonOpenDirectory.Name = "buttonOpenDirectory";
     
156.         this.buttonOpenDirectory.Size = new System.Drawing.Size(103, 23);
     
157.         this.buttonOpenDirectory.TabIndex = 8;
     
158.         this.buttonOpenDirectory.Text = "Open Directory";
     
159.         this.buttonOpenDirectory.Click += new System.EventHandler(this.OnOpenDirectory);
     
160.         this.buttonGetFile.Enabled = false;
     
161.         this.buttonGetFile.Location = new System.Drawing.Point(371, 122);
     
162.         this.buttonGetFile.Size = new System.Drawing.Size(103, 23);
     
163.         this.buttonGetFile.Text = "Get File";
     
164.         this.buttonGetFile.Click += new System.EventHandler(this.OnDownloadFile);
     
165.         this.checkBoxBinary.AutoSize = true;
     
166.         this.checkBoxBinary.Checked = true;
     
167.         this.checkBoxBinary.CheckState = System.Windows.Forms.CheckState.Checked;
     
168.         this.checkBoxBinary.Location = new System.Drawing.Point(371, 190);
     
169.         this.checkBoxBinary.Size = new System.Drawing.Size(81, 17);
     
170.         this.checkBoxBinary.Text = "Binary Mode";
     
171.         this.label2.AutoSize = true;
     
172.         this.label2.Location = new System.Drawing.Point(28, 62);
     
173.         this.label2.Size = new System.Drawing.Size(54, 13);
     
174.         this.label2.Text = "Username:";
     
175.         this.label3.AutoSize = true;
     
176.         this.label3.Location = new System.Drawing.Point(28, 101);
     
177.         this.label3.Size = new System.Drawing.Size(52, 13);
     
178.         this.label3.Text = "Password:";
     
179.         this.textUsername.Location = new System.Drawing.Point(109, 62);
     
180.         this.textUsername.Size = new System.Drawing.Size(146, 20);
     
181.         this.textUsername.Text = "Anonymous";
     
182.         this.textPassword.Location = new System.Drawing.Point(109, 101);
     
183.         this.textPassword.PasswordChar = '?';
     
184.         this.textPassword.Size = new System.Drawing.Size(146, 20);
     
185.         this.textPassword.UseSystemPasswordChar = true;
     
186.         this.ClientSize = new System.Drawing.Size(496, 353);
     
187.         this.Controls.Add(this.textPassword);
     
188.         this.Controls.Add(this.textUsername);
     
189.         this.Controls.Add(this.label3);
     
190.         this.Controls.Add(this.label2);
     
191.         this.Controls.Add(this.checkBoxBinary);
     
192.         this.Controls.Add(this.buttonGetFile);
     
193.         this.Controls.Add(this.buttonOpenDirectory);
     
194.         this.Controls.Add(this.listFiles);
     
195.         this.Controls.Add(this.buttonOpen);
     
196.         this.Controls.Add(this.textServer);
     
197.         this.Controls.Add(this.label1);
     
198.         this.Text = "FTP Client";
     
199.         this.ResumeLayout(false);
     
200.         this.PerformLayout();
     
201. 
     
202.     }
     
203.     private System.Windows.Forms.Label label1;
     
204.     private System.Windows.Forms.TextBox textServer;
     
205.     private System.Windows.Forms.Button buttonOpen;
     
206.     private System.Windows.Forms.StatusStrip statusStrip1;
     
207.     private System.Windows.Forms.ListBox listFiles;
     
208.     private System.Windows.Forms.Button buttonOpenDirectory;
     
209.     private System.Windows.Forms.Button buttonGetFile;
     
210.     private System.Windows.Forms.SaveFileDialog saveFileDialog1;
     
211.     private System.Windows.Forms.CheckBox checkBoxBinary;
     
212.     private System.Windows.Forms.Label label2;
     
213.     private System.Windows.Forms.Label label3;
     
214.     private System.Windows.Forms.TextBox textUsername;
     
215.     private System.Windows.Forms.TextBox textPassword;
     
216.     [STAThread]
     
217.     static void Main() {
     
218.         Application.EnableVisualStyles();
     
219.         Application.Run(new FtpClientForm());
     
220.     }
     
221. }

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