Question

我有两个问题：

首先，我正在努力将一些WMI对象添加到字典中。目前，每当我尝试添加所需的值时，我都会System.InvalidCastException: Specified cast is not valid.如何更正此问题？

其次，将这些WMI对象/值添加到我的字典后，如何将字典绑定到WPF组合框？我希望能够将字典值绑定，在这种情况下NetConnectionID到组合框下拉，同时在选择相应的值时从我的字典中返回Index。

这是我的代码：

class NetworkInterfaces
{
    public Dictionary<int, string> GetNetworkAdapters()
    {
        Dictionary<int, string> Adapters = new Dictionary<int, string>(); 

        try
        {
            ManagementObjectSearcher searcher = new ManagementObjectSearcher
                ("SELECT Index,NetConnectionID FROM Win32_NetworkAdapter");
            ManagementObjectCollection data = searcher.Get();
            foreach (ManagementObject item in data)
                Adapters.Add((int)item["Index"], (string)item["NetConnectionID"]);

            return Adapters;
        }
        catch (Exception ex)
        {
            Console.WriteLine("ERROR: " + ex);
        }

        return null;
    }
}

. . . .

    private void NetworkAdapters()
    {
        NetworkInterfaces NICInfo = new NetworkInterfaces();
        Dictionary<int, string> Adapters = NICInfo.GetNetworkAdapters();

        if (Adapters != null)
        {                
            cmbNetworkAdapters.ItemsSource = Adapters;
            cmbNetworkAdapters.DisplayMemberPath = "Value";
        }
    }

    private void cmbNetworkAdapters_DropDownOpened(object sender, EventArgs e)
    {
        cmbNetworkAdapters.DisplayMemberPath = "Key";
    }

    private void cmbNetworkAdapters_DropDownClosed(object sender, EventArgs e)
    {
        cmbNetworkAdapters.DisplayMemberPath = "Value";
    }

错误详情：

System.InvalidCastException was caught
  HResult=-2147467262
  Message=Specified cast is not valid.
  Source=MyProject
  StackTrace:
       at MyProject.NetworkInterfaces.GetNetworkAdapters() in h:\_Storage\Projects\MyProject\MyProject\NetworkInterfaces.cs:line 28
  InnerException:

System.InvalidCastException将WMI对象添加到Dictionary

0 个答案: