c#中如何获取本机用户名、MAC地址、IP地址、硬盘ID、CPU序列号、系统名称、物理内存

我们在利用C#开发桌面程序（Winform）程序的时候，
经常需要获取一些跟系统相关的信息，
以下这些代码获取能有些用处。
c#中如何获取本机用户名、MAC地址、IP地址、硬盘ID、CPU序列号、系统名称、物理内存。
首先需要引入命名空间：

usingSystem.Management;

/// 操作系统的登录用户名：

string GetUserName()
{
try
{
string st
="";
ManagementClass mc
=new ManagementClass("Win32_ComputerSystem");
ManagementObjectCollection moc
= mc.GetInstances();
foreach(ManagementObject mo
in moc)
{

st = mo["UserName"].ToString();
}
moc
=null;
mc
=null;
return st;
}
catch
{
return"unknow";
}
finally

{

}
}

//获取MAC地址：

string GetMacAddress()
{
try
{
//获取网卡硬件地址
string mac
="";
ManagementClass mc
=new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc
= mc.GetInstances();
foreach(ManagementObject mo
in moc)
{

if((bool)mo["IPEnabled"]==true)

{

mac = mo["MacAddress"].ToString();

break;

}
}
moc
=null;
mc
=null;
return mac;
}
catch
{
return"unknow";
}
finally
{

}
}

//获取IP地址：

/// <summary>
///
获取客户端内网IP地址

/// </summary>
///<returns></returns>
privatestaticstring
getClientLocalIPAddress()
{

string localIP=null;

try

{

IPHostEntry ipHost =System.Net.Dns.GetHostEntry(Dns.GetHostName());//
Dns.Resolve(Dns.GetHostName()); ;

IPAddress ipaddress = ipHost.AddressList[0];

localIP = ipaddress.ToString();

return"内网IP地址："+localIP;

}

catch

{
return"内网IP地址：unknown";

}

finally

{

}
}

/// <summary>
///
获得客户端外网IP地址
/// </summary>
/// <returns>IP地址</returns>
publicstaticstring
getClientInternetIPAddress()
{

string internetAddress
="";

try

{

using(WebClient webClient
=new WebClient())

{

internetAddress = webClient.DownloadString("http://www.coridc.com/ip");//从外部网页获得IP地址

//判断IP是否合法

if(!System.Text.RegularExpressions.Regex.IsMatch(internetAddress,
"[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}"))

{

internetAddress = webClient.DownloadString("http://fw.qq.com/ipaddress");//从腾讯提供的API中获得IP地址

}

}

return"外网IP地址："+ internetAddress;

}

catch

{

return"外网IP地址：unknown";

}

finally

{

}
}

//获取硬盘ID：

string GetDiskID()
{
try
{
String HDid
="";
ManagementClass mc
=new ManagementClass("Win32_DiskDrive");
ManagementObjectCollection moc
= mc.GetInstances();
foreach(ManagementObject mo
in moc)
{

//HDid =(string)mo.Properties["Model"].ToString();

HDid =(String)mo.Properties["Model"].Value.ToString();
}
moc
=null;
mc
=null;
return HDid;
}
catch
{
return"unknow";
}
finally
{

}
}

//获取CPUid：

string GetCpuID()
{
try
{
//获取CPU序列号代码
string cpuInfo
="";//cpu序列号
ManagementClass mc
=new ManagementClass("Win32_Processor");
ManagementObjectCollection moc
= mc.GetInstances();
foreach(ManagementObject mo
in moc)
{

cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
}
moc
=null;
mc
=null;
return cpuInfo;
}
catch
{
return"unknow";
}
finally
{

}
}

//系统名称：

string GetSystemType()
{
try
{
string st
="";
ManagementClass mc
=new ManagementClass("Win32_ComputerSystem");
ManagementObjectCollection moc
= mc.GetInstances();
foreach(ManagementObject mo
in moc)
{

st = mo["SystemType"].ToString();
}
moc
=null;
mc
=null;
return st;
}
catch
{
return"unknow";
}
finally
{

}
}

//获取物理内存：

string GetTotalPhysicalMemory()
{
try
{
string st
="";
ManagementClass mc
=new ManagementClass("Win32_ComputerSystem");
ManagementObjectCollection moc
= mc.GetInstances();
foreach(ManagementObject mo
in moc)
{

st = mo["TotalPhysicalMemory"].ToString();
}
moc
=null;
mc
=null;
return st;
}
catch
{

return"unknow";
}
finally
{

}
}