Question

C#代码 判断磁盘是不是U盘

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using Microsoft.Win32;
namespace UpData
{
public partial class FindUsb
{
[DllImport("kernel32")]
public FindUsb()
{
String[] logicDrivers = Environment.GetLogicalDrives(); ///返回驱动器名字
Console.WriteLine(String.Join(", ", logicDrivers));
int i=0;
for(;i< logicDrivers.Length;i++)
{

switch (GetDriveType(logicDrivers[i]))
{
case 3:
Console.WriteLine("root");
continue ;
case 5:
Console.WriteLine("CD");
continue;
case 2:
Console.WriteLine("USB");
continue;
default:
Console.WriteLine("unknown");
continue;
}
}
}
}
}
代码如上，现在VS报错：
错误 1 属性“DllImport”在该声明类型中无效。它只在“method”声明中有效。
错误 2 当前上下文中不存在名称“GetDriveType”

请教，这是什么问题？该如何解决？

Answer 1

using System.IO;

DriveInfo[] drive = DriveInfo.GetDrives();
for (int i = 0; i < drive.Length;i++ )
{
if (drive[i].IsReady)
{
drive[i].Name //名称
drive[i].TotalSize //大小
drive[i].TotalFreeSpace //剩余空间

}
}

Answer 2

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace WindowsApplication3
{
public class FindUSB
{
public static List<String> FindUSBDriver()
{
List<String> driverList = new List<string>();
DriveInfo[] myAllDrives = DriveInfo.GetDrives();
foreach (DriveInfo myDrive in myAllDrives) {
if (myDrive.IsReady) {
if (myDrive.DriveType == DriveType.Removable) {
driverList.Add(myDrive.Name);
}
}
}

return driverList;
}
}
}

Answer 3

[DllImport("kernel32.dll")]

追问

不好意思，这样改了，错误提示还是一模一样的....

Answer 4

要声明你引用了哪个DLL好像。。。

追问

using System.Runtime.InteropServices;
不是声明了么？不对吗？要怎么弄？