該應用程序稱爲一個接口，被編組爲不同的線程。當獲取USB_Hub的列表

Question

我使用下面的代碼獲取USB設備列表。但是，當我運行時沒有調試它顯示錯誤：

該應用程序稱爲一個接口，被編組爲一個不同的線程。

但是，當我運行應用程序調試它工作正常。我在單獨的類庫項目中使用此函數並在WPF窗體上調用它。

public static List<USBDeviceInfo> GetUSBDevices() 
    { 
     List<USBDeviceInfo> devices = new List<USBDeviceInfo>(); 
     ManagementScope scope = new ManagementScope("\\\\.\\ROOT\\cimv2"); 
     ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_USBHub"); 
     try 
     { 
      ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query); 
      ManagementObjectCollection queryCollection = searcher.Get(); 
      //ManagementObjectCollection collection; 
      //using (var searcher = new ManagementObjectSearcher(@"Select * From Win32_USBHub")) 
      //var searcher = new ManagementObjectSearcher(@"Select * From Win32_USBHub"); 
      //collection = searcher.Get(); 

      foreach (ManagementObject device in queryCollection) 
      { 
       devices.Add(new USBDeviceInfo(
       (string)device.GetPropertyValue("DeviceID"), 
       (string)device.GetPropertyValue("PNPDeviceID"), 
       (string)device.GetPropertyValue("Description"), 
       (string)device.GetPropertyValue("Name") 
       )); 
      } 
     } 
     catch (ManagementException MEEx) 
     { 
      throw MEEx; 
     } 
     catch(COMException COMEx) 
     { 
      throw COMEx; 
     } 
     finally 
     { 

     } 
     //collection.Dispose(); 
     return devices; 
    } 

    public class USBDeviceInfo 
    { 
     public USBDeviceInfo(string deviceID, string pnpDeviceID, string description, string name) 
     { 
      this.DeviceID = deviceID; 
      this.PnpDeviceID = pnpDeviceID; 
      this.Description = description; 
      this.Name = name; 
     } 
     public string DeviceID { get; private set; } 
     public string PnpDeviceID { get; private set; } 
     public string Description { get; private set; } 
     public string Name { get; private set; } 

    } 

Answer 1

我曾經

Application.Current.Dispatcher.InvokeAsync(new Action(() => {  IDALUsbDetection.GetUSBDevices(); })); 

調用函數。正常工作。