WMI RegDword getvalue和setvalue

Question

我无法从USBSTOR注册表项获取REG_DWORD数据，但我可以获得REG_SZ类型的'DisplayName'数据

ManagementScope myScope = new ManagementScope("\\\\" + strComputer + "\\root\\default");
ManagementPath mypath = new ManagementPath("StdRegProv");
ManagementClass mc = new ManagementClass(myScope, mypath, null);
ManagementBaseObject inParams = mc.GetMethodParameters("GetStringValue");
inParams["sSubKeyName"] = @"SYSTEM\CurrentControlSet\services\USBSTOR";
inParams["sValueName"] = "DisplayName";
ManagementBaseObject outParams = mc.InvokeMethod("GetStringValue", inParams, null);
Console.WriteLine(outParams["Type"].ToString());

Answer 1

如果数据类型为REG_DWORD，则应使用GetDWORDValue方法;如果数据类型为REG_SZ，则应使用GetStringValue方法：

ManagementBaseObject inParams = mc.GetMethodParameters("GetDWORDValue");
inParams["sSubKeyName"] = @"SYSTEM\CurrentControlSet\services\USBSTOR";
inParams["sValueName"] = "Type";
ManagementBaseObject outParams = mc.InvokeMethod("GetDWORDValue", inParams, null);
UInt32 uValue = (UInt32)outParams["uValue"];
//...
ManagementBaseObject inParams = mc.GetMethodParameters("GetStringValue");
inParams["sSubKeyName"] = @"SYSTEM\CurrentControlSet\services\USBSTOR";
inParams["sValueName"] = "DisplayName";
ManagementBaseObject outParams = mc.InvokeMethod("GetStringValue", inParams, null);
string sValue = (string)outParams["sValue"];