前段時間在測試我們觸摸屏聯網性能的時候，由于屏的Mac位址通過系統資料庫設定，而PB定制WinCE核心的時候就有一個預設值，是以一批下來Mac位址都一樣，兩台以上的機器一聯網準出問題，通過系統資料庫軟體去修改Mac位址太麻煩了，是以做了一個小的Mac位址軟體。
以前用VB做了一個系統資料庫操作類（參見我的blog：
http://blog.csdn.net/yefanqiu/archive/2004/07/13/40379.aspx），功能比較詳盡；現在用C#做了一個系統資料庫操作類也别簡單的隻做資料讀寫了，索性也做個全功能的了。由于.Net在域名空間Microsoft.Win32中提供RegistryKey類，操作系統資料庫還是比較友善的，唯感不足的時在操作多級子鍵的時候不很便捷，是以在封裝系統資料庫操作類的時候也把這部分内容給考慮進去了。
系統資料庫操作類代碼（可以用在.Net精簡架構集下）如下：
///<summary>
///系統資料庫操作類 -- 葉帆工作室
///</summary>
public class YFReg
{
public enum HKEY { HKEY_LOCAL_MACHINE = 0, HKEY_CLASSES_ROOT = 1, HKEY_CURRENT_USER = 2, HKEY_USERS = 3 };
private RegistryKey[] reg = new RegistryKey[4];
public YFReg()
{
reg[(int)HKEY.HKEY_LOCAL_MACHINE] = Registry.LocalMachine;
reg[(int)HKEY.HKEY_CLASSES_ROOT] = Registry.ClassesRoot;
reg[(int)HKEY.HKEY_CURRENT_USER] = Registry.CurrentUser;
reg[(int)HKEY.HKEY_USERS] = Registry.Users;
}
//讀指定變量值
public string ReadValue(HKEY Root,string SubKey,string ValueName)
{
RegistryKey subKey=reg[(int)Root];
if (ValueName.Length == 0) return "[ERROR]";
try
{
if (SubKey.Length > 0)
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.OpenSubKey(strKeyName);
}
}
string strKey = subKey.GetValue(ValueName).ToString();
subKey.Close();
return strKey;
}
catch
{
return "[ERROR]";
}
}
//讀指定變量的類型
public RegistryValueKind ReadValueType(HKEY Root, string SubKey, string ValueName)
{
RegistryKey subKey = reg[(int)Root];
if (ValueName.Length == 0) return RegistryValueKind.Unknown;
try
{
if (SubKey.Length > 0)
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.OpenSubKey(strKeyName);
}
}
RegistryValueKind valueType = subKey.GetValueKind(ValueName);
subKey.Close();
return valueType;
}
catch
{
return RegistryValueKind.Unknown;
}
}
//寫指定變量值
public int WriteValue(HKEY Root, string SubKey, string ValueName, string ValueData)
{
return WriteValue(Root, SubKey, ValueName, ValueData, RegistryValueKind.String);
}
//寫指定變量值
public int WriteValue(HKEY Root, string SubKey, string ValueName,object ValueData,RegistryValueKind ValueType)
{
RegistryKey subKey = reg[(int)Root];
if (ValueName.Length == 0) return 2;
try
{
if (SubKey.Length > 0)
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.CreateSubKey(strKeyName);
}
}
subKey.SetValue(ValueName, ValueData, ValueType);
subKey.Close();
return 0;
}
catch
{
return 1;
}
}
//删除指定變量
public int DeleteValue(HKEY Root, string SubKey, string ValueName)
{
RegistryKey subKey = reg[(int)Root];
try
{
if (SubKey.Length > 0)
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.OpenSubKey(strKeyName,true);
}
}
subKey.DeleteValue(ValueName, true);
subKey.Close();
return 0;
}
catch
{
return 1;
}
}
//建立指定的鍵
public int CreateKey(HKEY Root, string SubKey, string KeyName)
{
RegistryKey subKey = reg[(int)Root];
if (KeyName.Length == 0) return 2;
try
{
if (SubKey.Length > 0)
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.CreateSubKey(strKeyName);
}
}
subKey.CreateSubKey(KeyName);
subKey.Close();
return 0;
}
catch
{
return 1;
}
}
//删除指定的鍵
public int DeleteKey(HKEY Root, string SubKey, string KeyName)
{
RegistryKey subKey = reg[(int)Root];
try
{
if (SubKey.Length > 0)
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.OpenSubKey(strKeyName, true);
}
}
subKey.DeleteSubKeyTree(KeyName);
subKey.Close();
return 0;
}
catch
{
return 1;
}
}
//判斷指定的鍵是否存在
public int IsExistKey(HKEY Root, string SubKey, string KeyName)
{
RegistryKey subKey = reg[(int)Root];
try
{
if (SubKey.Length > 0)
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.OpenSubKey(strKeyName);
}
}
string[] strSubKey1 = subKey.GetSubKeyNames();
foreach (string strKeyName in strSubKey1)
{
if (strKeyName == KeyName) return 0;
}
return 1;
}
catch
{
return 2;
}
}
//枚舉指定的鍵的子鍵
public string[] EnumKeyName(HKEY Root, string SubKey)
{
RegistryKey subKey = reg[(int)Root];
if (SubKey.Length == 0) return null;
try
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.OpenSubKey(strKeyName);
}
string[] strKey = subKey.GetSubKeyNames();
subKey.Close();
return strKey;
}
catch
{
return null;
}
}
//枚舉指定的鍵的值
public string[] EnumValueName(HKEY Root, string SubKey)
{
RegistryKey subKey = reg[(int)Root];
if (SubKey.Length == 0) return null;
try
{
string[] strSubKey = SubKey.Split('//');
foreach (string strKeyName in strSubKey)
{
subKey = subKey.OpenSubKey(strKeyName);
}
string[] strValue = subKey.GetValueNames();
subKey.Close();
return strValue;
}
catch
{
return null;
}
}
} 類出來了，用它讀寫Mac位址就是小菜一碟了，下面是讀寫Mac位址的示例代碼：
private void btnRead_Click(object sender, EventArgs e)
{
txtMAC1.Text = reg.ReadValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress0");
txtMAC2.Text = reg.ReadValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress1");
txtMAC3.Text = reg.ReadValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress2");
txtMAC4.Text = reg.ReadValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress3");
txtMAC5.Text = reg.ReadValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress4");
txtMAC6.Text = reg.ReadValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress5");
}
private void btnWrite_Click(object sender, EventArgs e)
{
int intRet = 0;
intRet += reg.WriteValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress0", txtMAC1.Text);
intRet += reg.WriteValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress1", txtMAC2.Text);
intRet += reg.WriteValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress2", txtMAC3.Text);
intRet += reg.WriteValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress3", txtMAC4.Text);
intRet += reg.WriteValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress4", txtMAC5.Text);
intRet += reg.WriteValue(YFReg.HKEY.HKEY_LOCAL_MACHINE, @"Comm/DM9CE1/Parms", "SoftwareMacAddress5", txtMAC6.Text);
if (intRet > 0)
{
MessageBox.Show("更改失敗");
}
} ![淺析ARP協定[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)