求助 c# 怎样获取u盘序列号

Question

   c#获取u盘的序列号，就是想唯一认定U盘，怎么实现呢？谢谢各位了！

Answer 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Management;namespace USBSNTest
{
    public class USBSerialNumber
     {
        string _serialNumber;
        string _driveLetter;        public string getSerialNumberFromDriveLetter(string driveLetter)
         {
            this._driveLetter = driveLetter.ToUpper();            if (!this._driveLetter.Contains(":"))
             {
                this._driveLetter += ":";
             }             matchDriveLetterWithSerial();            return this._serialNumber;
         }        private void matchDriveLetterWithSerial()
         {            string[] diskArray;
            string driveNumber;
            string driveLetter;             ManagementObjectSearcher searcher1 = new ManagementObjectSearcher("SELECT * FROM Win32_LogicalDiskToPartition");
            foreach (ManagementObject dm in searcher1.Get())
             {
                 diskArray = null;
                 driveLetter = getValueInQuotes(dm["Dependent"].ToString());
                 diskArray = getValueInQuotes(dm["Antecedent"].ToString()).Split(',');
                 driveNumber = diskArray[0].Remove(0, 6).Trim();
                if (driveLetter == this._driveLetter)
                 {
                    /* This is where we get the drive serial */
                     ManagementObjectSearcher disks = new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive");
                    foreach (ManagementObject disk in disks.Get())
                     {                        if (disk["Name"].ToString() == ("\\\\.\\PHYSICALDRIVE" + driveNumber) & disk["InterfaceType"].ToString() == "USB")
                         {
                            this._serialNumber = parseSerialFromDeviceID(disk["PNPDeviceID"].ToString());
                         }
                     }
                 }
             }
         }        private string parseSerialFromDeviceID(string deviceId)
         {
            string[] splitDeviceId = deviceId.Split('\\');
            string[] serialArray;
            string serial;
            int arrayLen = splitDeviceId.Length - 1;             serialArray = splitDeviceId[arrayLen].Split('&');
             serial = serialArray[0];            return serial;
         }        private string getValueInQuotes(string inValue)
         {
            string parsedValue = "";            int posFoundStart = 0;
            int posFoundEnd = 0;             posFoundStart = inValue.IndexOf("\"");
             posFoundEnd = inValue.IndexOf("\"", posFoundStart + 1);             parsedValue = inValue.Substring(posFoundStart + 1, (posFoundEnd - posFoundStart) - 1);            return parsedValue;
         }
     }
} 　　最后，调用方法如下：
USBSerialNumber usbSN = new USBSerialNumber();
textBox3.Text = usbSN.getSerialNumberFromDriveLetter("I");//I为我机器上的U盘盘符，可以自己定义，但是一定要是机器上正在运转的U盘哦 

Answer 2

private void matchDriveLetterWithSerial()
  {  string[] diskArray;
  string driveNumber;
  string driveLetter;  ManagementObjectSearcher searcher1 = new ManagementObjectSearcher("SELECT * FROM Win32_LogicalDiskToPartition");
   有错误 未能找到类型或命名空间名称“ManagementObjectSearcher”(是否缺少 using 指令或程序集引用?)

Answer 3

解决方案添加引用 --System.Mangement

Answer 4

 if (disk["Name"].ToString() == ("\\\\.\\PHYSICALDRIVE" + driveNumber) & disk["InterfaceType"].ToString() == "USB")
未将对象引用设置到对象的实例