如何用WPF结合WinSCP工具实现FTP文件的批量下载操作？

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使用WPF结合WinSCP进行FTP下载Nuget包，安装WinSCP后，进入安装目录`packages\WinSCP.5.21.6\tools`，复制两个文件到Debug调试目录。以下代码实现使用WinSCP下载FTP文件：

csharpusing System;using WinSCP;

public class FtpDownloader{ public static void Main() { string hostName=ftp.example.com; string userName=user; string password=password; string localPath=@C:\path\to\local\file;

using (Session session=new Session()) { session.ConnectionInfo=new ConnectionInfo(hostName, userName, password); session.Open();

TransferOptions transferOptions=new TransferOptions(); transferOptions.TransferMode=TransferMode.Binary;

session.GetFiles(path/to/file, localPath, false, transferOptions).Check();

session.Close(); }

Console.WriteLine(下载完成！); }}

WPF 使用 WinSCP 做 FTP 下载

Nuget安装WinSCP

当安装完成后进入安装后的目录packages\WinSCP.5.21.6\tools将两个文件拷贝Debug调试（运行）目录下。

下面开始代码实现使用WinSCP FTP下载。

示例代码

1）xaml代码如下：

<wpfdev:Window x:Class="WpfApp1.Window1"         xmlns="schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="schemas.microsoft.com/winfx/2006/xaml"         xmlns:d="schemas.microsoft.com/expression/blend/2008"         xmlns:mc="schemas.openxmlformats.org/markup-compatibility/2006"         xmlns:wpfdev="github.com/WPFDevelopersOrg/WPFDevelopers"         xmlns:local="clr-namespace:WpfApp1"         mc:Ignorable="d" WindowStyle="ToolWindow"         Title="WinSCP - FTP" Height="450" Width="800">     <Grid>         <WrapPanel VerticalAlignment="Center"                    HorizontalAlignment="Center">             <TextBlock Name="myTextBlock" Margin="10,0" VerticalAlignment="Center"/>             <wpfdev:CircularProgressBar Name="myCircularProgressBar"                                          BrushStrokeThickness="2"                                         StrokeThickness="5"                                         Size="20,20"                                         BorderBrush="#42ABAC"                                          Background="#E14D5F"                                         Value="0"/>             <Button Style="{StaticResource PrimaryButton}" Margin="10,0" Content="Download" Click="Button_Click"/>         </WrapPanel>     </Grid> </wpfdev:Window>

2）cs代码如下：

using System; using System.IO; using System.Threading.Tasks; using System.Windows; using WinSCP; namespace WpfApp1 {     /// <summary>     /// Window1.xaml 的交互逻辑     /// </summary>     public partial class Window1     {         public Window1()         {             InitializeComponent();         }         private void Button_Click(object sender, RoutedEventArgs e)         {             myCircularProgressBar.Value = 0;             Task.Run(() =>             {                 Download();             });         }         bool Download()         {             try             {                                  SessionOptions sessionOptions = new SessionOptions                 {                     Protocol = Protocol.Ftp,                     HostName = "127.0.0.1",                     UserName = "wpfdevelopers",                     Password = "wpfdevelopers",                 };                 string localPath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory,"packages");                 if (Directory.Exists(localPath))                     DeleteDirectory(localPath);                 string remotePath = "packages";                 using (Session session = new Session())                 {                     session.FileTransferProgress += Session_FileTransferProgress;                     session.Open(sessionOptions);                     TransferOptions transferOptions = new TransferOptions();                     transferOptions.TransferMode = TransferMode.Binary;                     TransferOperationResult transferResult = session.GetFiles(remotePath, localPath, false, transferOptions);                     transferResult.Check();                 }                 return true;             }             catch (Exception)             {                 return false;             }         }         void DeleteDirectory(string target_dir)         {             string[] files = Directory.GetFiles(target_dir);             string[] dirs = Directory.GetDirectories(target_dir);             foreach (string file in files)             {                 File.SetAttributes(file, FileAttributes.Normal);                 File.Delete(file);             }             foreach (string dir in dirs)             {                 DeleteDirectory(dir);             }             Directory.Delete(target_dir, false);         }         private void Session_FileTransferProgress(object sender, FileTransferProgressEventArgs e)         {             Dispatcher.BeginInvoke(new Action(() =>             {                                 var value = (int)(e.OverallProgress * 100);                 myCircularProgressBar.Value = value;                 if (value == 100)                     myTextBlock.Text = "文件已经全部下载完成";                 else                     myTextBlock.Text = $"正在下载文件 {System.IO.Path.GetFileName(e.FileName)}";             }));         }     } }

效果图

下载完成的文件

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