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更新win32_打印机管理对象需要很长时间

performance wmi

Alexander Taran · 技术社区 · 16 年前

我使用以下代码更改打印机的“端口”属性。问题是它的执行时间超过了一分钟。有办法加快速度吗? 我是否可以实例化管理对象,而不是使用WMI对象的所有属性?更重要的是,如何只更新1个属性? 也许我应该在不使用搜索器的情况下实例化ManagementObject?

ManagementPath mPath = new ManagementPath();
mPath.Server = Server.TrimStart(new char[] {'\\'});
mPath.NamespacePath = "root\\cimv2";
ManagementScope mScope = new ManagementScope();
mScope.Options.Impersonation = ImpersonationLevel.Impersonate;
mScope.Path = mPath;
SelectQuery sQ = new SelectQuery();
sQ.ClassName = "Win32_Printer";

//sQ.SelectedProperties.Add("PortName");
//sQ.SelectedProperties.Add("DeviceID");

sQ.Condition = string.Format("Name=\"{0}\"", Name);

ManagementObjectSearcher s = new ManagementObjectSearcher(mScope, sQ);
foreach (ManagementObject service in s.Get())
{
string oldname = service.Properties["PortName"].Value.ToString();
service.Properties["PortName"].Value  = PortName;
service.Put( );
this.Port = PortName;
return true;

}

1 回复 | 直到 16 年前

Alexander Taran 16 年前

  ManagementPath mPath = new ManagementPath() ;
        mPath.NamespacePath = "root\\cimv2";
        mPath.Server = Server.TrimStart(new char[] { '\\' });
        mPath.RelativePath = "Win32_Printer.DeviceID=\"" + Name + "\"";
        ManagementObject Printer = new ManagementObject(mPath);
        string oldname = Printer.Properties["PortName"].Value.ToString();
        Printer.Properties["PortName"].Value = PortName;
        Printer.Put();