[网络协议][PDA開發]獲得PDA的ip地址與機器名稱

項目背景：需在后臺（SQL）記錄各PDA系統的使用情況，故需從前端傳入當前設備的ip地址與機器編碼。

得到本機IP:

  public string getLocalIP()
        {
            string strHostName = Dns.GetHostName(); //得到本机的主机名
            IPHostEntry ipEntry = Dns.GetHostByName(strHostName); //取得本机IP
            string strAddr = ipEntry.AddressList[0].ToString();
            return (strAddr);
        }

獲取機器名稱：

[DllImport("coredll.dll", EntryPoint = "KernelIoControl", SetLastError = true)]
        private extern static bool KernelIoControl(Int32 IoControlCode, IntPtr InputBuffer, Int32 InputBufferSize, byte[] OutputBuffer, Int32 OutputBufferSize, ref Int32 BytesReturned);
        private static Int32 FILE_DEVICE_HAL = 0x00000101;
        private static Int32 IOCTL_HAL_GET_DEVICEID =
            ((FILE_DEVICE_HAL) << 16) | ((0x0) << 14) | ((21) << 2) | (0x0);
        public string GetPDASerialNumber()
        {
            byte[] outputBuffer = new byte[256];
            Int32 outputBufferSize = outputBuffer.Length;
            Int32 bytesReturned = 0;
            bool retVal = KernelIoControl(IOCTL_HAL_GET_DEVICEID, IntPtr.Zero, 0, outputBuffer, outputBufferSize, ref bytesReturned);
            // If the request failed, exit the method now           
            if (retVal == false)
            {
                return String.Empty;
            }
            Int32 presetIdOffset = BitConverter.ToInt32(outputBuffer, 4);
            Int32 platformIdOffset = BitConverter.ToInt32(outputBuffer, 0xc);
            Int32 platformIdSize = BitConverter.ToInt32(outputBuffer, 0x10);
            StringBuilder sb = new StringBuilder();
            sb.Append(String.Format(CultureInfo.InvariantCulture, "{0:X8}-{1:X4}-{2:X4}-{3:X4}-",
                BitConverter.ToInt32(outputBuffer, presetIdOffset),
                BitConverter.ToInt16(outputBuffer, presetIdOffset + 4),
                BitConverter.ToInt16(outputBuffer, presetIdOffset + 6),
                BitConverter.ToInt16(outputBuffer, presetIdOffset + 8)));
            for (int i = platformIdOffset; i < platformIdOffset + platformIdSize; i++)
            {
                sb.Append(String.Format(CultureInfo.InvariantCulture, "{0:X2}", outputBuffer[i]));
            }               // return the device id string           
            return sb.ToString();
        }

String MNum = GetPDASerialNumber();
? ? ? ? ? ? if (MNum.Length >= 50)
? ? ? ? ? ? ? ? MNum = MNum.Substring(24, 16);

MessageBox.Show("machineNum: " + MNum); //0079005A-006C-006F-006E-00

MessageBox.Show("IP: " + getLocalIP()); //10.4.211.198

傳輸方式就是通過WebService把相應參數傳入SQL，此處不贅述。

附 - 常見異常：

1.引入命名空間

using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
using System.Net;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Threading;
using System.Globalization;
using System.Windows.Forms;

2.缺少OpenNETCF DLL集合 - > 自己去 CSDN資源 下載吧~

3.在MSDN上提到GetHostByName已过时。替代品是GetHostEntry。但GetHostEntry得到的并不是我們想要的地址。

public string getLocalIP()
		{
			string strAddr = "";
			//string strAddr1 ="";
			string strHostName = Dns.GetHostName(); //得到本机的主机名
			//IPHostEntry ipEntry = Dns.GetHostByName(strHostName); //取得本机IP 10.4.0.134
			IPHostEntry ipEntry1 = Dns.GetHostEntry(strHostName); //取得本机IP fe80::7060:37ec:9e18:31ec%3

			for (int i = 0; i < ipEntry1.AddressList.Length; i++)
			{
				//从IP地址列表中筛选出IPv4类型的IP地址
				//AddressFamily.InterNetwork表示此IP为IPv4,
				//AddressFamily.InterNetworkV6表示此地址为IPv6类型
				if (ipEntry1.AddressList[i].AddressFamily == AddressFamily.InterNetwork)
				{
					strAddr = ipEntry1.AddressList[i].ToString();//10.4.0.134
				}
				//else if(ipEntry1.AddressList[i].AddressFamily == AddressFamily.InterNetworkV6)
				//{
				//	strAddr1 = ipEntry1.AddressList[i].ToString();//fe80::7060:37ec:9e18:31ec%3
				//}
			}			
			return (strAddr);
		}