FTP類未使用

Question

今天我第一次嘗試了C＃。我想上傳一個文件夾到FTP服務器並使用這個FTP CLass：http://www.codeproject.com/Tips/443588/Simple-Csharp-FTP-Class

現在，當我使用方法時，它說「名稱ftpClient在該上下文中不存在」。我將複製我的代碼：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.IO; 
using System.Net 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 


namespace DaloCloud 
{ 

    public partial class Form1 : Form 
    { 
     static int x = 200;  // For Help-Screen 
     static int y = 200;  // For Help-Screen 
     string username;  // FTP-Username Value stored in there 
     string password;  // FTP-Password Value stored in there 
     string dirPath;   // C:\DaloUpload 
     string uploadPath;  // ftp: //daloserver/users/username/files 

     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void Form1_Load(object sender, EventArgs e) 
     { 

     } 

     private void pictureBox1_Click(object sender, EventArgs e) 
     { 

     } 

     private void helpButton_Click(object sender, EventArgs e) 
     { 
      // Create a new instance of Form2 and set its Visible property to true. 
      Form2 form2 = new Form2(); 
      form2.Visible = true; 

     } 

     private void usernameTextbox_TextChanged(object sender, EventArgs e) 
     { 
      username = usernameTextbox.Text; 
     } 

     private void passwordTextbox_TextChanged(object sender, EventArgs e) 
     { 
      password = passwordTextbox.Text; 
     } 

     private void connectButton_Click(object sender, EventArgs e) 
     { 
      string[] files = Directory.GetFiles(dirPath, "*.*"); 
      string[] subDirs = Directory.GetDirectories(dirPath); 

      foreach (string file in files) 
      { 
       ftpClient.upload(uploadPath + "/" + Path.GetFileName(file), file); 
      } 

      foreach (string subDir in subDirs) 
      { 
       ftpClient.createDirectory(uploadPath + "/" + Path.GetFileName(subDir)); 
       recursiveDirectory(subDir, uploadPath + "/" + Path.GetFileName(subDir)); 
      } 
     } 
    } 
} 

Answer 1

在C＃中，您必須先聲明變量，然後才能使用它們。您尚未聲明名爲ftpClient的任何變量。

這個錯誤告訴你很簡潔，ftpClient在你使用它的地方不存在。你必須聲明它存在。

魔法門看起來是這樣的：

FTPClient ftpClient = new FTPClient();