查詢不能在C＃中工作，但在PowerShell中工作

Question

誰知道爲什麼我的查詢"select Name, ProcessID, Caption from Win32_Process where ProcessId='" + processIds[index] + "'"在我的程序C＃返回

Column 'Name' does not belong to table Win32_Process 

。

在PowerShell中當我執行

Get-WmiObject -query "select Name, ProcessID, Caption from win32_process" 

它的作品！

String queryString = "select Name, ProcessID, Caption from Win32_Process where ProcessId='" + processIds[index] + "'"; 
       SelectQuery query = new SelectQuery(queryString); 

       ConnectionOptions options = new ConnectionOptions(); 
       options.Authentication = System.Management.AuthenticationLevel.PacketPrivacy; 


       ManagementScope scope = new System.Management.ManagementScope("\\root\\cimv2"); 
       ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query); 
       try 
       { 
        ManagementObjectCollection processes = searcher.Get(); 
        DataTable result = new DataTable(); 
        foreach (ManagementObject mo in processes) 
        { 
         DataRow row = result.NewRow(); 
         if (mo["Name"] != null) 
          row["Name"] = mo["Name"].ToString(); 
         row["ProcessId"] = Convert.ToInt32(mo["ProcessId"]); 
         if (mo["Caption"] != null) 
          row["Caption"] = mo["Caption"].ToString(); 
         result.Rows.Add(row); 
        } 

感謝您的幫助

Answer 1

此代碼：

const string queryString = "SELECT Name, ProcessID, Caption FROM Win32_Process"; 

var scope = new ManagementScope(@"\root\cimv2"); 
var query = new ObjectQuery(queryString); 
var searcher = new ManagementObjectSearcher(scope, query); 
var objectCollection = searcher.Get(); 

foreach (var o in objectCollection) 
{ 
    Console.WriteLine("{0} {1} {2}", o["Name"], o["ProcessID"], o["Caption"]); 
} 

...工作正常，我。你的代碼究竟是如何工作的？

（順便說一下，您似乎沒有在options上做任何事情）。

更新：

它實際上是在抱怨，因爲你已經不是你DataTable設置列。我認爲你已經減少了太多的例子。你的DataTable被稱爲「Win32_Process」，是嗎？如果我把我的「偉業」：

var table = new DataTable("Albert"); 

我得到Column 'Name' does not belong to table Albert.

你需要做類似如下：

var table = new DataTable("Albert"); 
table.Columns.Add("Name"); 
table.Columns.Add("ProcessID", typeof(int)); 
table.Columns.Add("Caption");