以编程方式创建ftp站点

Question

我已经编写了在ftp中创建新站点的代码。但它给了com例外。本代码附后以供参考。

异常详细信息包括

System.Runtime.InteropServices.COMException was unhandled
  Message="Filename: \r\nError: Unrecognized element 'ftpServer'\r\n\r\n"
  Source=""
  ErrorCode=-2147023483
  StackTrace:
       at Microsoft.Web.Administration.Interop.IAppHostElement.GetElementByName(String bstrSubName)
       at Microsoft.Web.Administration.ConfigurationElement.GetChildElement(String elementName)
       at WindowsFormsTest.Form2.CreateFTPSite(String serverName, String siteName, String siteID) in D:\My Projects\WindowsFormsTest\WindowsFormsTest\Form2.cs:line 48
       at WindowsFormsTest.Form2.button1_Click(Object sender, EventArgs e) in D:\My Projects\WindowsFormsTest\WindowsFormsTest\Form2.cs:line 25
       at System.Windows.Forms.Control.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ButtonBase.WndProc(Message& m)
       at System.Windows.Forms.Button.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at WindowsFormsTest.Program.Main() in D:\My Projects\WindowsFormsTest\WindowsFormsTest\Program.cs:line 18
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

创建ftp站点的代码：

using(ServerManager serverManager = new ServerManager()) { 
        Microsoft.Web.Administration.Configuration config = serverManager.GetApplicationHostConfiguration();

        ConfigurationSection sitesSection = config.GetSection("system.applicationHost/sites");

        ConfigurationElementCollection sitesCollection = sitesSection.GetCollection();

        ConfigurationElement siteElement = sitesCollection.CreateElement("site");
        siteElement["name"] = @"eMentorftp";

        ConfigurationElementCollection bindingsCollection = siteElement.GetCollection("bindings");

        ConfigurationElement bindingElement = bindingsCollection.CreateElement("binding");
        bindingElement["protocol"] = @"ftp";
        bindingElement["bindingInformation"] = @"*:21:";
        bindingsCollection.Add(bindingElement);

        ConfigurationElement ftpServerElement = siteElement.GetChildElement("ftpServer");

        ConfigurationElement securityElement = ftpServerElement.GetChildElement("security");

        ConfigurationElement sslElement = securityElement.GetChildElement("ssl");
        sslElement["serverCertHash"] = @"53FC3C74A1978C734751AB7A14A3E48F70A58A84";
        sslElement["controlChannelPolicy"] = @"SslRequire";
        sslElement["dataChannelPolicy"] = @"SslRequire";

        ConfigurationElement authenticationElement = securityElement.GetChildElement("authentication");

        ConfigurationElement basicAuthenticationElement = authenticationElement.GetChildElement("basicAuthentication");
        basicAuthenticationElement["enabled"] = true;

        ConfigurationElementCollection siteCollection = siteElement.GetCollection();

        ConfigurationElement applicationElement = siteCollection.CreateElement("application");
        applicationElement["path"] = @"/";

        ConfigurationElementCollection applicationCollection = applicationElement.GetCollection();

        ConfigurationElement virtualDirectoryElement = applicationCollection.CreateElement("virtualDirectory");
        virtualDirectoryElement["path"] = @"/";
        virtualDirectoryElement["physicalPath"] = @"D:\Ftp";
        applicationCollection.Add(virtualDirectoryElement);
        siteCollection.Add(applicationElement);
        sitesCollection.Add(siteElement);

        serverManager.CommitChanges();

Answer 1

您可以从异常中看出您的错误是什么。查看异常堆栈跟踪中的第一行：

System.Runtime.InteropServices.COMException未处理Message=“文件名：\r\n错误:未识别元素‘ftpServer’\r\n\n”“Source="”ErrorCode=-2147023483“

首先，我们看到“未被识别的元素'ftpserver'”--这将告诉我们在查看代码时发生了什么。但除此之外，我们还得到了一个错误代码，它可以准确地告诉我们抛出COMException的原因。如果我们将错误代码解码为无符号int (十六进制)，就会得到：

0x80070585

这对应于以下错误代码：

• 8:失败
• 7: Win32
• 585：(1413小数点)：无效索引(ERROR_INVALID_INDEX)

有关错误代码的更多信息，请参见赫鲁特和Win32错误码。

因此，我们抛出了一个COMException，因为我们使用了一个无效的索引。我们在异常消息中得到一个“未被识别的元素'ftpServer'”。查看您的代码，通过告诉ConfigurationElement siteElement添加一个名为“site”的新元素来创建一个新的sitesCollection：

Microsoft.Web.Administration.Configuration config = serverManager.GetApplicationHostConfiguration();
ConfigurationSection sitesSection = config.GetSection("system.applicationHost/sites");
ConfigurationElementCollection sitesCollection = sitesSection.GetCollection();
ConfigurationElement siteElement = sitesCollection.CreateElement("site");

然后为站点创建一个名称，并在站点的绑定集合中创建绑定：

siteElement["name"] = @"eMentorftp";
ConfigurationElementCollection bindingsCollection = siteElement.GetCollection("bindings");
ConfigurationElement bindingElement = bindingsCollection.CreateElement("binding");
bindingElement["protocol"] = @"ftp";
bindingElement["bindingInformation"] = @"*:21:";
bindingsCollection.Add(bindingElement);

不幸的是，您随后尝试使用名称“ftpServer”获取站点的子元素：

ConfigurationElement ftpServerElement = siteElement.GetChildElement("ftpServer"); 

但是，刚刚制作的ConfigurationElement siteElement却没有一个名叫ftpServer的孩子！因此，我们得到一个无效的索引并抛出一个异常。您是否打算在这一行代码中创建一个子元素？

顺便说一句，我认为这是一个COMException，因为.NET接口与底层IIS7 COM对象互操作。不是Microsoft.Web名称空间的专家(一点也不)，这只是猜测。