在xml C＃中选择特定节点

Question

我制作了一个程序来显示LTE设备信息。我遇到的问题是尝试仅显示设备名称时发生此错误“对象引用未设置为对象的实例。”

 public void GetInfo()
    {
        Initialise();

        var Info = Get("api/device/information");

        LogMessage(DateTime.Now.ToShortDateString() + " " + DateTime.Now.ToShortTimeString());
        LogMessage(string.Format("Device name:\n {0}", Info.SelectSingleNode("//response/devicename").InnerText)); //something wrong here?

    }

错误：

System.NullReferenceException: Object reference not set to an instance of an object.
   at HuaweiRouterTool.HuaweiRouter.GetInfo() in C:\Users\pxc\Desktop\HuaweiRouterTool-master\HuaweiRouter.cs:line 233
   at HuaweiRouterTool.Program.DeviceInfo() in C:\Users\pxc\Desktop\HuaweiRouterTool-master\Program.cs:line 41
   at HuaweiRouterTool.Program.Main(String[] args) in C:\Users\pxc\Desktop\HuaweiRouterTool-master\Program.cs:line 21

但是当我删除“设备名称”时，它会显示所有值。

public void GetInfo()
    {
        Initialise();

        var Info = Get("api/device/information");

        LogMessage(DateTime.Now.ToShortDateString() + " " + DateTime.Now.ToShortTimeString());
        LogMessage(string.Format("Device name:\n {0}", Info.SelectSingleNode("//response").InnerText));

    }

我在这里做什么错了？

Answer 1

我已经解决了这个问题。

我将“ DeviceName”改为“ DeviceName”，并且现在可以使用。