根据存储的值类型,我必须使用以下方法之一：
GetBinaryValue GetDWORDValue GetExpandedStringValue GetMultiStringValue GetStringValue
如果我所知道的值是hive,key和value name,我不想尝试所有五个.有没有办法做到这一点？我正在使用WMI,但如果唯一的方法是使用advapi32.dll方法,我对此持开放态度.
您可以使用
StdRegProv.EnumValues方法枚举键的值,找出值的类型并确定要调用的Get方法.
这样的事情(抱歉,我不太了解C#所以这段代码可能远非完美)：
using System;
using System.Management;
using System.Management.Instrumentation;
namespace ConsoleApplication1
{
public enum RegHive : uint
{
HKEY_CLASSES_ROOT = 0x80000000,HKEY_CURRENT_USER = 0x80000001,HKEY_LOCAL_MACHINE = 0x80000002,HKEY_USERS = 0x80000003,HKEY_CURRENT_CONfig = 0x80000005
}
public enum RegType
{
REG_SZ = 1,REG_EXPAND_SZ,REG_BINARY,REG_DWORD,REG_MULTI_SZ = 7
}
class Program
{
static void Main(string[] args)
{
const string strComputer = "computername";
Connectionoptions options = new Connectionoptions();
options.Impersonation = ImpersonationLevel.Impersonate;
options.EnablePrivileges = true;
options.Username = "username";
options.Password = "password";
ManagementScope myScope = new ManagementScope("\\\\" + strComputer + "\\root\\default",options);
ManagementPath mypath = new ManagementPath("StdRegProv");
ManagementClass mc = new ManagementClass(myScope,mypath,null);
object ovalue = GetValue(mc,RegHive.HKEY_LOCAL_MACHINE,"SOFTWARE\\Microsoft\\Windows\\CurrentVersion","ProgramFilesDir");
Console.WriteLine(ovalue.ToString());
}
public static object GetValue(ManagementClass mc,RegHive hDefKey,string sSubKeyName,string sValueName)
{
RegType rType = GetValueType(mc,hDefKey,sSubKeyName,sValueName);
ManagementBaSEObject inParams = mc.getmethodParameters("GetStringValue");
inParams["hDefKey"] = hDefKey;
inParams["sSubKeyName"] = sSubKeyName;
inParams["sValueName"] = sValueName;
object ovalue = null;
switch (rType)
{
case RegType.REG_SZ:
ManagementBaSEObject outParams = mc.InvokeMethod("GetStringValue",inParams,null);
if (Convert.ToUInt32(outParams["ReturnValue"]) == 0)
{
ovalue = outParams["sValue"];
}
else
{
// GetStringValue call Failed
}
break;
case RegType.REG_EXPAND_SZ:
outParams = mc.InvokeMethod("GetExpandedStringValue",null);
if (Convert.ToUInt32(outParams["ReturnValue"]) == 0)
{
ovalue = outParams["sValue"];
}
else
{
// GetExpandedStringValue call Failed
}
break;
case RegType.REG_MULTI_SZ:
outParams = mc.InvokeMethod("GetMultiStringValue",null);
if (Convert.ToUInt32(outParams["ReturnValue"]) == 0)
{
ovalue = outParams["sValue"];
}
else
{
// GetMultiStringValue call Failed
}
break;
case RegType.REG_DWORD:
outParams = mc.InvokeMethod("GetDWORDValue",null);
if (Convert.ToUInt32(outParams["ReturnValue"]) == 0)
{
ovalue = outParams["uValue"];
}
else
{
// GetDWORDValue call Failed
}
break;
case RegType.REG_BINARY:
outParams = mc.InvokeMethod("GetBinaryValue",null);
if (Convert.ToUInt32(outParams["ReturnValue"]) == 0)
{
ovalue = outParams["uValue"] as byte[];
}
else
{
// GetBinaryValue call Failed
}
break;
}
return ovalue;
}
public static RegType GetValueType(ManagementClass mc,string sValueName)
{
ManagementBaSEObject inParams = mc.getmethodParameters("EnumValues");
inParams["hDefKey"] = hDefKey;
inParams["sSubKeyName"] = sSubKeyName;
ManagementBaSEObject outParams = mc.InvokeMethod("EnumValues",null);
if (Convert.ToUInt32(outParams["ReturnValue"]) == 0)
{
string[] sNames = outParams["sNames"] as String[];
int[] iTypes = outParams["Types"] as int[];
for (int i = 0; i < sNames.Length; i++)
{
if (sNames[i] == sValueName)
{
return (RegType)iTypes[i];
}
}
// value not found
}
else
{
// EnumValues call Failed
}
}
}
}