C# 使用非托管FindFirstVolume枚举C中带有.NET的卷#
我试图枚举没有direve字母的驱动器,以便获得每个驱动器上的剩余空间。此应用程序必须与Windows XP配合使用,因此Win32_卷类不可用 执行以下代码时,将引发System.ExecutionEngineeExceptionC# 使用非托管FindFirstVolume枚举C中带有.NET的卷#,c#,.net,unmanaged,winapi,C#,.net,Unmanaged,Winapi,我试图枚举没有direve字母的驱动器,以便获得每个驱动器上的剩余空间。此应用程序必须与Windows XP配合使用,因此Win32_卷类不可用 执行以下代码时,将引发System.ExecutionEngineeException using System; using System.Text; using System.Runtime.InteropServices; using System.Collections.Generic; class Test : IDisposable {
using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Collections.Generic;
class Test : IDisposable
{
public static void Main( string[] args )
{
try
{
GetVolumes();
}
catch (Exception e)
{
Console.WriteLine( e.ToString() );
}
}
//HANDLE WINAPI FindFirstVolume(
// __out LPTSTR lpszVolumeName,
// __in DWORD cchBufferLength
//);
[DllImport( "kernel32.dll", EntryPoint = "FindFirstVolume", SetLastError = true, CallingConvention = CallingConvention.StdCall )]
public static extern int FindFirstVolume(
out StringBuilder lpszVolumeName,
int cchBufferLength );
[DllImport( "kernel32.dll", EntryPoint = "FindNextVolume", SetLastError = true, CallingConvention = CallingConvention.StdCall )]
public static extern bool FindNextVolume(
int hFindVolume,
out StringBuilder lpszVolumeName,
int cchBufferLength );
public static List<string> GetVolumes()
{
const int N = 1024;
StringBuilder cVolumeName = new StringBuilder( (int)N );
List<string> ret = new List<string>();
int volume_handle = FindFirstVolume( out cVolumeName, N );
do
{
ret.Add( cVolumeName.ToString() );
Console.WriteLine( cVolumeName.ToString() );
} while (FindNextVolume( volume_handle, out cVolumeName, N ));
return ret;
}
void IDisposable.Dispose()
{
throw new NotImplementedException();
}
}
使用系统;
使用系统文本;
使用System.Runtime.InteropServices;
使用System.Collections.Generic;
类测试:IDisposable
{
公共静态void Main(字符串[]args)
{
尝试
{
GetVolumes();
}
捕获(例外e)
{
Console.WriteLine(如ToString());
}
}
//处理WINAPI FindFirstVolume(
//输出LPTSTR lpszVolumeName,
//以DWORD cchBufferLength表示
//);
[DllImport(“kernel32.dll”,EntryPoint=“FindFirstVolume”,SetLastError=true,CallingConvention=CallingConvention.StdCall)]
公共静态外部内部FindFirstVolume(
out StringBuilder lpszVolumeName,
int cchBufferLength);
[DllImport(“kernel32.dll”,EntryPoint=“FindNextVolume”,SetLastError=true,CallingConvention=CallingConvention.StdCall)]
公共静态外部bool FindNextVolume(
int HFIND卷,
out StringBuilder lpszVolumeName,
int cchBufferLength);
公共静态列表GetVolumes()
{
常数int N=1024;
StringBuilder cVolumeName=新的StringBuilder((int)N);
List ret=新列表();
int volume_handle=FindFirstVolume(out cVolumeName,N);
做
{
ret.Add(cVolumeName.ToString());
Console.WriteLine(cVolumeName.ToString());
}while(FindNextVolume(volume_handle,out cVolumeName,N));
返回ret;
}
void IDisposable.Dispose()无效
{
抛出新的NotImplementedException();
}
}
从StringBuilder之前删除:
[DllImport( "kernel32.dll", EntryPoint = "FindFirstVolume", SetLastError = true, CallingConvention = CallingConvention.StdCall )]
public static extern int FindFirstVolume(
StringBuilder lpszVolumeName,
int cchBufferLength );
[DllImport( "kernel32.dll", EntryPoint = "FindNextVolume", SetLastError = true, CallingConvention = CallingConvention.StdCall )]
public static extern bool FindNextVolume(
int hFindVolume,
StringBuilder lpszVolumeName,
int cchBufferLength );