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//调用windows API获取磁盘空闲空间
//导入库
[DllImport(\
static extern bool GetDiskFreeSpace([MarshalAs(UnmanagedType.LPTStr)]string rootPathName,
ref int sectorsPerCluster, ref int bytesPerSector,
ref int numberOfFreeClusters, ref int totalNumbeOfClusters); ///
/// 获取指定路径的大小 ///
///
///
public static long GetDirectoryLength(string dirPath) {
long len = 0;
//判断该路径是否存在（是否为文件夹） if (!Directory.Exists(dirPath)) {
//查询文件的大小
len = FileSize(dirPath);
}
else {
//定义一个DirectoryInfo对象
DirectoryInfo di = new DirectoryInfo(dirPath);
//通过GetFiles方法，获取di目录中的所有文件的大小 foreach (FileInfo fi in di.GetFiles()) {
len += fi.Length;
}
//获取di中所有的文件夹，并存到一个新的对象数组中，以进行递归 DirectoryInfo[] dis = di.GetDirectories(); if (dis.Length > 0) {
for (int i = 0; i < dis.Length; i++) {
len += GetDirectoryLength(dis[i].FullName);
}
} }
return len; }
///
/// 获取指定路径的占用空间 ///
/// ///
public static long GetDirectorySpace(string dirPath) {
//返回值
long len = 0;
//判断该路径是否存在（是否为文件夹） if (!Directory.Exists(dirPath)) {
//如果是文件，则调用
len = FileSpace(dirPath); }
else {
//定义一个DirectoryInfo对象
DirectoryInfo di = new DirectoryInfo(dirPath); //本机的簇值
long clusterSize = GetClusterSize(di); //遍历目录下的文件，获取总占用空间
foreach (FileInfo fi in di.GetFiles()) {
//文件大小除以簇，余若不为0
if (fi.Length % clusterSize != 0) {
decimal res = fi.Length / clusterSize;
//文件大小除以簇，取整数加1。为该文件占用簇的值 int clu = Convert.ToInt32(Math.Ceiling(res)) + 1; long result = clusterSize * clu; len += result; }
else
{
//余若为0，则占用空间等于文件大小 len += fi.Length; } }
//获取di中所有的文件夹，并存到一个新的对象数组中，以进行递归 DirectoryInfo[] dis = di.GetDirectories(); if (dis.Length > 0) {
for (int i = 0; i < dis.Length; i++)
{
len += GetDirectorySpace(dis[i].FullName); } } }
return len; }
//所给路径中所对应的文件大小
public static long FileSize(string filePath)
{
//定义一个FileInfo对象，是指与filePath所指向的文件相关联，以获取其大小
FileInfo fileInfo = new FileInfo(filePath); return fileInfo.Length; }
//所给路径中所对应的文件占用空间
public static long FileSpace(string filePath) {
long temp = 0;
//定义一个FileInfo对象，是指与filePath所指向的文件相关联，以获取其大小
FileInfo fileInfo = new FileInfo(filePath); long clusterSize = GetClusterSize(fileInfo); if (fileInfo.Length % clusterSize != 0) {
decimal res = fileInfo.Length / clusterSize;
int clu = Convert.ToInt32(Math.Ceiling(res)) + 1; temp = clusterSize * clu; }
else {
return fileInfo.Length; }
return temp; }
public static DiskInfo GetDiskInfo(string rootPathName) {
DiskInfo diskInfo = new DiskInfo();
int sectorsPerCluster = 0, bytesPerSector = 0, numberOfFreeClusters = 0, totalNumberOfClusters = 0;
GetDiskFreeSpace(rootPathName, ref sectorsPerCluster, ref bytesPerSector, ref numberOfFreeClusters, ref totalNumberOfClusters);
//每簇的扇区数
diskInfo.SectorsPerCluster = sectorsPerCluster; //每扇区字节
diskInfo.BytesPerSector = bytesPerSector;
return diskInfo; }
////
/// 结构。硬盘信息 ///
public struct DiskInfo {
public string RootPathName; //每簇的扇区数
public int SectorsPerCluster; //每扇区字节
public int BytesPerSector;
public int NumberOfFreeClusters; public int TotalNumberOfClusters; }
///
/// 获取每簇的字节 ///
/// ///
public static long GetClusterSize(FileInfo file) {
long clusterSize = 0;
DiskInfo diskInfo = new DiskInfo();
diskInfo = GetDiskInfo(file.Directory.Root.FullName); clusterSize = (diskInfo.BytesPerSector * diskInfo.SectorsPerCluster); return clusterSize; }
///
/// 获取每簇的字节 ///
/// ///
public static long GetClusterSize(DirectoryInfo dir) {
long clusterSize = 0;
DiskInfo diskInfo = new DiskInfo();
diskInfo = GetDiskInfo(dir.Root.FullName); clusterSize = (diskInfo.BytesPerSector * diskInfo.SectorsPerCluster); return clusterSize; }
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