Registery
//============================================================================================================
// Copyright (C) 2004-2005 Microsoft Corporation
// All rights reserved.
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR
// FITNESS FOR A PARTICULAR PURPOSE.
//============================================================================================================
using System;
using Microsoft.Win32;
namespace Helper
{
/// <summary>
/// Wrapper for functions to access the Registry.
/// </summary>
public sealed class RegistryHelper
{
/// <summary>
/// Get the value from the keyName and the valueName specified
/// key should be a subkey under HKeyLocalMachine
/// </summary>
/// <param name="keyName"></param>
/// <param name="valueName"></param>
/// <returns></returns>
public static string GetValueFromLocalMachine(string keyName, string valueName)
{
RegistryKey subKey;
try
{
//open the localMachine
RegistryKey localMachine = Registry.LocalMachine;
//open the subkey specified
subKey = localMachine.OpenSubKey(keyName);
}
catch(Exception ex)
{
throw new RegistryKeyNotFoundException("Key not found!", keyName, valueName, ex);
}
//if the key was not found, throw an error
if(subKey == null)
{
throw new RegistryKeyNotFoundException("Key not found!", keyName, valueName);
}
//get the value
object keyValue = subKey.GetValue(valueName);
//throw an exception if the value not found
if(keyValue == null)
{
throw new RegistryKeyNotFoundException("Value not found!" ,keyName, valueName);
}
return keyValue.ToString();
}
/// <summary>
/// Set Registry Key in the Current user node
/// </summary>
/// <param name="keyValue"></param>
public static void SetValueOnCurrentUser(string keyName, string valueName, int keyValue)
{
RegistryKey key = Registry.CurrentUser.CreateSubKey(keyName);
key.SetValue(valueName,keyValue);
}
/// <summary>
/// Get the value of a registry key from the current user node
/// </summary>
/// <param name="keyName"></param>
/// <param name="valueName"></param>
/// <returns></returns>
public static object GetValueFromCurrentUser(string keyName, string valueName)
{
RegistryKey subKey;
try
{
//open the localMachine
RegistryKey localMachine = Registry.CurrentUser;
//open the subkey specified
subKey = localMachine.OpenSubKey(keyName);
}
catch(Exception ex)
{
throw new RegistryKeyNotFoundException("Key not found!", keyName, valueName, ex);
}
//if the key was not found, throw an error
if(subKey == null)
{
throw new RegistryKeyNotFoundException("Key not found!", keyName, valueName);
}
//get the value
object keyValue = subKey.GetValue(valueName);
//throw an exception if the value not found
if(keyValue == null)
{
throw new RegistryKeyNotFoundException("Value not found!" ,keyName, valueName);
}
return keyValue;
}
/// <summary>
/// New exception type for missing keys
/// </summary>
public class RegistryKeyNotFoundException : ApplicationException
{
/// <summary>
/// define private variables to hold data
/// </summary>
private string keyName;
private string valueName;
private Exception innerException;
/// <summary>
/// Get the KeyName associated with this exception
/// </summary>
public string KeyName
{
get
{
return keyName;
}
}
/// <summary>
/// Get the value name associated with this exception
/// </summary>
public string ValueName
{
get
{
return valueName;
}
}
/// <summary>
/// pass the key that was not found
/// </summary>
/// <param name="keyName"></param>
public RegistryKeyNotFoundException(string message, string keyName, string valueName, Exception innerException) :base(message,innerException)
{
this.keyName= keyName;
this.valueName = valueName;
this.innerException = innerException;
}
/// <summary>
/// pass the key and the value that was not found
/// </summary>
/// <param name="keyName"></param>
public RegistryKeyNotFoundException(string message, string keyName, string valueName) : base(message)
{
this.valueName = valueName;
this.keyName= keyName;
}
}
}
}
