添加 WHERE Name = 时出现无效查询错误

Question

public static void Command(string vCommand, string machineName, string username, string password)
            {
                ManagementScope Scope = null;
                ConnectionOptions ConnOptions = null;
                ObjectQuery ObjQuery = null;
                ManagementObjectSearcher ObjSearcher = null;
                try
                {
                    ConnOptions = new ConnectionOptions();
                    ConnOptions.Impersonation = ImpersonationLevel.Impersonate;
                    ConnOptions.EnablePrivileges = true;
                    //local machine
                    if (machineName.ToUpper() == Environment.MachineName.ToUpper())
                        Scope = new ManagementScope(@"\ROOT\CIMV2", ConnOptions);
                    else
                    {
                        //remote machine
                        ConnOptions.Username = username;
                        ConnOptions.Password = password;
                        Scope = new ManagementScope(@"\\" + machineName + @"\ROOT\CIMV2", ConnOptions);
                    }
                    Scope.Connect();

                    ObjQuery = new ObjectQuery("SELECT * FROM Win32_Directory WHERE Name = 'c:\\0stuff'");
                    ObjSearcher = new ManagementObjectSearcher(Scope, ObjQuery);

                    foreach (ManagementObject obj in ObjSearcher.Get()) //ERROR HAPPEN HERE
                    {
                       //code here
                    }

                    if (ObjSearcher != null)
                    {
                        ObjSearcher.Dispose();
                    }
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
        }

如果我只使用“ObjQuery = new ObjectQuery("SELECT * FROM Win32_Directory");”，我完全没有问题。

但一旦我尝试使用“WHERE Name = X”，我就会收到“无效查询”错误。

我不知道出了什么问题。 （在有人问之前，是的 c:\0stuff 存在）。

Answer 1

您需要使用逐字字符串 @"..." 来防止反斜杠在 C# 中被视为转义序列：

@"SELECT * FROM Win32_Directory WHERE Name = 'c:\\0stuff'"

如果没有 @ ，则实际发送的查询看起来像这样：

SELECT * FROM Win32_Directory WHERE Name = 'c:\0stuff'

请注意，反斜杠不再被正确转义。