c# - 无效查询 C#

Question

今天我用 C# 编写了我的第二个代码为什么它不起作用？代码(看起来)是正确的!

错误代码:无效查询

代码:

  static void Main(string[] args)
      {
          GetComponent("Win32_Processor", "Name");
        Console.Read();
        Console.ReadKey();
      }

    private static void GetComponent(string hwclass, string syntax)
    {
    ManagementObjectSearcher mos = new ManagementObjectSearcher ("root\\CIMV2","SELECT * FROM" + hwclass);
    foreach(ManagementObject mj in mos.Get())
       {
           Console.WriteLine(Convert.ToString(mj[syntax]));
       }


    }  

Answer 1

请使用格式化 或字符串插值 (C# 6.0+) 以避免语法错误:

private static void GetComponent(string hwclass, string syntax) {
  //DONE: keep query readable
  string query = 
    $@"select * 
         from {hwclass}"; // <- you've missed space here

  //DONE: wrap IDisposable into using
  using (ManagementObjectSearcher mos = new ManagementObjectSearcher("root\\CIMV2", query)) {
    foreach(ManagementObject mj in mos.Get())
      Console.WriteLine(Convert.ToString(mj[syntax]));
  }
}