我在我的应用中使用了这个（How to unzip files in Windows Phone 8）帖子中的UnZipper类来获取带图片的拉链，但在极少数情况下它会给我这个错误：
类型＆＃39; System.OutOfMemoryException＆＃39;的第一次机会异常。发生在System.Windows.ni.dll System.OutOfMemoryException：类型的异常＆＃39; System.OutOfMemoryException＆＃39;被扔了。在System.Windows.Application.GetResourceStreamInternal（StreamResourceInfo zipPackageStreamResourceInfo，乌里resourceUri）在System.Windows.Application.GetResourceStream（StreamResourceInfo zipPackageStreamResourceInfo，乌里uriResource）在ImperiaOnline.Plugins.UnZipper.GetFileStream（字符串文件名）在ImperiaOnline.Plugins.IOHelpers.unzip （String zipFilePath，String zipDestinationPath）
设备有两倍以上的空闲内存。有人可以帮我这个。这是我的代码：
public static void unzip(string zipFilePath,string zipDestinationPath) {
using (IsolatedStorageFile isolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
var dirNames = isolatedStorage.GetDirectoryNames(zipDestinationPath);
bool doesFolderExists = (dirNames.Length > 0) ? true : false;
if (!doesFolderExists)
{
Debug.WriteLine("Folder does not exists");
isolatedStorage.CreateDirectory(zipDestinationPath);
}
try
{
using (IsolatedStorageFileStream zipFile = isolatedStorage.OpenFile(zipFilePath, FileMode.Open, FileAccess.ReadWrite))
{
UnZipper unzip = new UnZipper(zipFile);
bool isModuleFolderDeleted = false;
foreach (string currentFileAndDirectory in unzip.FileNamesInZip())
{
string[] fileLocations = currentFileAndDirectory.Split('/');
string prefix = zipDestinationPath + '/';
int locationsCount = fileLocations.Length;
string fileName = fileLocations.Last();
string currentPath = prefix;
for (int i = 0; i < locationsCount - 1; i++)
{
dirNames = isolatedStorage.GetDirectoryNames(currentPath + fileLocations[i]);
doesFolderExists = (dirNames.Length > 0) ? true : false;
if (!doesFolderExists)
{
isolatedStorage.CreateDirectory(currentPath + fileLocations[i]);
if (i == 2)
{
isModuleFolderDeleted = true;
}
}
else if (i == 2 && !isModuleFolderDeleted)
{
Debug.WriteLine(currentPath + fileLocations[i] + " is deleted and recreated");
DeleteDirectoryRecursively(isolatedStorage, currentPath + fileLocations[i]);
isolatedStorage.CreateDirectory(currentPath + fileLocations[i]);
isModuleFolderDeleted = true;
}
currentPath += fileLocations[i] + '/';
}
var newFileStream = isolatedStorage.CreateFile(currentPath + fileName);
byte[] fileBytes = new byte[unzip.GetFileStream(currentFileAndDirectory).Length];
unzip.GetFileStream(currentFileAndDirectory).Read(fileBytes, 0, fileBytes.Length);
unzip.GetFileStream(currentFileAndDirectory).Close();
try
{
newFileStream.Write(fileBytes, 0, fileBytes.Length);
}
catch (Exception ex)
{
Debug.WriteLine("FILE WRITE EXCEPTION: " + ex);
newFileStream.Close();
newFileStream = null;
zipFile.Close();
unzip.Dispose();
}
newFileStream.Close();
newFileStream = null;
}
zipFile.Close();
unzip.Dispose();
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
isolatedStorage.DeleteFile(zipFilePath);
}
}
public static void unzip(string zipFilePath,string zipDestinationPath) {
using (IsolatedStorageFile isolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
var dirNames = isolatedStorage.GetDirectoryNames(zipDestinationPath);
bool doesFolderExists = (dirNames.Length > 0) ? true : false;
if (!doesFolderExists)
{
Debug.WriteLine("Folder does not exists");
isolatedStorage.CreateDirectory(zipDestinationPath);
}
try
{
using (IsolatedStorageFileStream zipFile = isolatedStorage.OpenFile(zipFilePath, FileMode.Open, FileAccess.ReadWrite))
{
UnZipper unzip = new UnZipper(zipFile);
bool isModuleFolderDeleted = false;
foreach (string currentFileAndDirectory in unzip.FileNamesInZip())
{
string[] fileLocations = currentFileAndDirectory.Split('/');
string prefix = zipDestinationPath + '/';
int locationsCount = fileLocations.Length;
string fileName = fileLocations.Last();
string currentPath = prefix;
for (int i = 0; i < locationsCount - 1; i++)
{
dirNames = isolatedStorage.GetDirectoryNames(currentPath + fileLocations[i]);
doesFolderExists = (dirNames.Length > 0) ? true : false;
if (!doesFolderExists)
{
isolatedStorage.CreateDirectory(currentPath + fileLocations[i]);
if (i == 2)
{
isModuleFolderDeleted = true;
}
}
else if (i == 2 && !isModuleFolderDeleted)
{
Debug.WriteLine(currentPath + fileLocations[i] + " is deleted and recreated");
DeleteDirectoryRecursively(isolatedStorage, currentPath + fileLocations[i]);
isolatedStorage.CreateDirectory(currentPath + fileLocations[i]);
isModuleFolderDeleted = true;
}
currentPath += fileLocations[i] + '/';
}
var newFileStream = isolatedStorage.CreateFile(currentPath + fileName);
byte[] fileBytes = new byte[unzip.GetFileStream(currentFileAndDirectory).Length];
unzip.GetFileStream(currentFileAndDirectory).Read(fileBytes, 0, fileBytes.Length);
unzip.GetFileStream(currentFileAndDirectory).Close();
try
{
newFileStream.Write(fileBytes, 0, fileBytes.Length);
}
catch (Exception ex)
{
Debug.WriteLine("FILE WRITE EXCEPTION: " + ex);
newFileStream.Close();
newFileStream = null;
zipFile.Close();
unzip.Dispose();
}
newFileStream.Close();
newFileStream = null;
}
zipFile.Close();
unzip.Dispose();
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
isolatedStorage.DeleteFile(zipFilePath);
}
}
此处出现此错误：
var newFileStream = isolatedStorage.CreateFile(currentPath + fileName); byte[] fileBytes = new byte[unzip.GetFileStream(currentFileAndDirectory).Length]; unzip.GetFileStream(currentFileAndDirectory).Read(fileBytes, 0, fileBytes.Length); unzip.GetFileStream(currentFileAndDirectory).Close();
我调试了它，它在
上失败了byte[] fileBytes = new byte[unzip.GetFileStream(currentFileAndDirectory).Length];
我检查了GetFileStream方法
public Stream GetFileStream(string filename)
{
if (fileEntries == null)
fileEntries = ParseCentralDirectory(); //We need to do this in case the zip is in a format Silverligth doesn't like
long position = this.stream.Position;
this.stream.Seek(0, SeekOrigin.Begin);
Uri fileUri = new Uri(filename, UriKind.Relative);
StreamResourceInfo info = new StreamResourceInfo(this.stream, null);
StreamResourceInfo stream = System.Windows.Application.GetResourceStream(info, fileUri);
this.stream.Position = position;
if (stream != null)
return stream.Stream;
return null;
}
它会在此行上抛出OutOfMemory异常：
StreamResourceInfo stream = System.Windows.Application.GetResourceStream(info, fileUri);