VB.net中的FTP操作：创建、删除、查询、、上传案例

   与FTP服务器联机沟通之前，先确定应用程序要执行的操作，如上传下载文件、 目录增删列举等。

       FTP服务器在接收到应用程序引用GetResponse（）方法要求返回操作消息的时候，会根据应用程序所指定的方法进行相关操作，故要在此之前预先指定FTP 所要执行的方法。

    简单地说：联机发起的同时，也发送操作指令。回应指令的同时也完成客户端的指令。

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-12-30 22:12  WindowsApplication1\
     目录           0  2019-12-30 22:12  WindowsApplication1\WindowsApplication1\
     文件       22250  2019-10-29 00:11  WindowsApplication1\WindowsApplication1\Form1.Designer.vb
     文件        5817  2019-10-29 00:11  WindowsApplication1\WindowsApplication1\Form1.resx
     文件        6921  2019-10-29 00:11  WindowsApplication1\WindowsApplication1\Form1.vb
     目录           0  2019-12-30 22:12  WindowsApplication1\WindowsApplication1\My Project\
     文件        1523  2019-10-28 22:49  WindowsApplication1\WindowsApplication1\My Project\Application.Designer.vb
     文件         510  2019-10-28 22:49  WindowsApplication1\WindowsApplication1\My Project\Application.myapp
     文件        1117  2019-10-28 22:49  WindowsApplication1\WindowsApplication1\My Project\AssemblyInfo.vb
     文件        2790  2019-10-28 22:49  WindowsApplication1\WindowsApplication1\My Project\Resources.Designer.vb
     文件        5612  2010-05-04 06:45  WindowsApplication1\WindowsApplication1\My Project\Resources.resx
     文件        3017  2019-10-28 22:49  WindowsApplication1\WindowsApplication1\My Project\Settings.Designer.vb
     文件         279  2010-05-04 06:45  WindowsApplication1\WindowsApplication1\My Project\Settings.settings
     文件        5216  2019-10-28 22:53  WindowsApplication1\WindowsApplication1\WindowsApplication1.vbproj
     文件         227  2019-10-28 22:53  WindowsApplication1\WindowsApplication1\WindowsApplication1.vbproj.user
     目录           0  2019-12-30 22:12  WindowsApplication1\WindowsApplication1\bin\
     目录           0  2020-02-20 23:25  WindowsApplication1\WindowsApplication1\bin\Debug\
     文件       38912  2019-10-29 00:22  WindowsApplication1\WindowsApplication1\bin\Debug\WindowsApplication1.exe
     文件       54784  2019-10-29 00:22  WindowsApplication1\WindowsApplication1\bin\Debug\WindowsApplication1.pdb
     文件       11600  2020-02-20 23:26  WindowsApplication1\WindowsApplication1\bin\Debug\WindowsApplication1.vshost.exe
     文件         490  2010-03-17 22:39  WindowsApplication1\WindowsApplication1\bin\Debug\WindowsApplication1.vshost.exe.manifest
     文件         708  2019-10-29 00:22  WindowsApplication1\WindowsApplication1\bin\Debug\WindowsApplication1.xml
     目录           0  2020-02-20 23:31  WindowsApplication1\WindowsApplication1\bin\Release\
     目录           0  2019-12-30 22:12  WindowsApplication1\WindowsApplication1\obj\
     目录           0  2019-12-30 22:12  WindowsApplication1\WindowsApplication1\obj\x86\
     目录           0  2020-02-20 23:25  WindowsApplication1\WindowsApplication1\obj\x86\Debug\
     文件        3453  2020-02-20 23:25  WindowsApplication1\WindowsApplication1\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        6299  2020-02-20 23:25  WindowsApplication1\WindowsApplication1\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2019-12-30 22:12  WindowsApplication1\WindowsApplication1\obj\x86\Debug\TempPE\
     文件        7680  2019-10-28 22:49  WindowsApplication1\WindowsApplication1\obj\x86\Debug\TempPE\My Project.Resources.Designer.vb.dll
     文件         180  2019-10-29 00:22  WindowsApplication1\WindowsApplication1\obj\x86\Debug\WindowsApplication1.Form1.resources
............此处省略9个文件信息