在局域网中访问其他计算机的时候会需要IP地址，我们是可以查看在同一个局域网内其他计算机的IP地址的。
第一步：在查询其他计算机IP地址之前，要先找到局域网内其他的计算机，打开“开始”-“运行”—输入“cmd”，如图1：
图1
第二步：在命令窗口输入“net view”，按Enter键之后显示出局域网内所有正在运行的电脑，如图2：
图2
第三步：在命令窗口接着输入“ping —4 计算机名称”，如小编找的是“JINXIN—02A5F942”这台计算机的IP，按Enter之后就会弹出这台计算机的IP地址，如图3：
//=====================================================
C#得到局域网内所有主机名，IP地址，MAC地址
private void btnCheck_Click(object sender, EventArgs e)
{
string ipAddress = this.cboBoxIp.Text.Trim();
Regex rgx = new Regex(@"^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}$");
if (rgx.IsMatch(ipAddress))
{
this.labelIpResult.Text = GetName(ipAddress);
this.labelMacResult.Text = GetMacAddress(ipAddress);
}
else
{
this.labelIpResult.Text = "IP address is not valid.";
this.labelMacResult.Text = "No mac result";
}
}
/// <summary>
/// 得到所有局域网内机器名
/// </summary>
private void GetAllLocalMachineName()
{
System.Diagnostics.ProcessStartInfo prcssStrtInfo = new System.Diagnostics.ProcessStartInfo();
prcssStrtInfo.FileName = @"C:windowssystem32cmd.exe";
prcssStrtInfo.Arguments = @"/c net view > F:\LanMachineName.txt"; // 将所有局域网机器名输出到文本文件
prcssStrtInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
System.Diagnostics.Process.Start(prcssStrtInfo);
}
/// <summary>
/// 通过Ip地址获得主机名
/// </summary>
/// <param name="IpAddress"></param>
/// <returns></returns>
private string GetName(string IpAddress)//获取指定IP的计算机名称
{
string name="";
try
{
IPHostEntry ipHstEntry = Dns.GetHostByAddress(IpAddress);//传递IP地址
//IPHostEntry ipHstEntry = Dns.GetHostEntry(IpAddress);
name = ipHstEntry.HostName.ToString();//取得主机名
}
catch (Exception e)
{
name = e.Message;
}
return name;
}
/// <summary>
/// 通过Ip得到MAC地址
/// </summary>
/// <param name="IpAddress"></param>
/// <returns></returns>
private string GetMacAddress(string IpAddress)//得到指定IP的MAC地址
{
string macAddress = "";
Int32 ldest = 0;
try
{
ldest = inet_addr(IpAddress);
}
catch (Exception iperr)
{
MessageBox.Show(iperr.Message);
}
Int64 macinfo = new Int64();
Int32 len = 6;
try
{
int res = SendARP(ldest, 0, ref macinfo, ref len);
}
catch (Exception err)
{
// throw new Exception("在解析MAC地址过程发生了错误!");
MessageBox.Show(err.Message);
}
string originalMACAddress = macinfo.ToString("X4");
if (originalMACAddress != "0000" && originalMACAddress.Length == 12)
{ //合法MAC地址
string mac1, mac2, mac3, mac4, mac5, mac6;
mac1 = originalMACAddress.Substring(10, 2);
mac2 = originalMACAddress.Substring(8, 2);
mac3 = originalMACAddress.Substring(6, 2);
mac4 = originalMACAddress.Substring(4, 2);
mac5 = originalMACAddress.Substring(2, 2);
mac6 = originalMACAddress.Substring(0, 2);
macAddress = mac1 + ":" + mac2 + ":" + mac3 + ":" + mac4 + ":" + mac5 + ":" + mac6;
//canPing = true;
}
else
{
macAddress = "无法探测到MAC地址";
//canPing = false;
}
return macAddress;
}
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