I've been searching for it and I've not been able to find it. I wanted to know if it is possible to Zip a folder without any external dll nor any external references - just with native features.
I've been able to Zip files with System.IO.Packaging, but it does not include folders and I cannot tell it to Zip the parent folder.
I know there are external dll and so, but I'd like to know if it's possible to make it from a native way.
Thank you.
Your best bet is to use a 3rd party library. But if you can't I found this blog post that describes how to do it using System.IO.Packaging. Note this is c# not vb, but the example use of the framework is all you should need.
http://weblogs.asp.net/albertpascual/archive/2009/05/18/creating-a-folder-inside-the-zip-file-with-system-io-packaging.aspx
private static void AddFileToZip(string zipFilename, string fileToAdd, string sDirectory)
{
using (Package zip = System.IO.Packaging.Package.Open(zipFilename, FileMode.OpenOrCreate))
{
string destFilename = ".\\" + sDirectory + "\\" + Path.GetFileName(fileToAdd);
Uri uri = PackUriHelper.CreatePartUri(new Uri(destFilename, UriKind.Relative));
if (zip.PartExists(uri))
{
zip.DeletePart(uri);
}
PackagePart part = zip.CreatePart(uri, "", CompressionOption.Normal);
using (FileStream fileStream = new FileStream(fileToAdd, FileMode.Open, FileAccess.Read))
{
using (Stream dest = part.GetStream())
{
CopyStream(fileStream, dest);
}
}
}
}
That post references another post by Jon Galloway that talks about 3rd party libraries and doing it manually. That is a good reference as well.
Related
I have a mvc 4.5 application where I show a grid. The first column of the grid is a document name. The document name is an hyper link to the actual document that is hosted on our site and is available via a url. The documents can be pdf or doc or ppt. I can access these documents only via url and I do not have access to the actual physical document on our server.
I am providing users an option to select one or many of these documents from the grid and then they can download them. What I am trying to achieve is read each of the selected documents via the url and write it to a zip file and make the zip file downloadable. So users will be downloading one file instead of multiple files.
I have tried to stream the documents via url in memory and then add it to the zip file using ZipArchive Library from Microsoft. This is not working for me.
I was able to add documents that was on disk to zip file using Zip Archive and it works great. But I do not have access to the physical document as I can access the documents only through URL. My next option is to download each of these documents into a temp location on server and then add it to zip file using Zip Archive.But I am trying to avoid downloading files into a temp location
Please suggest how I can achieve reading documents via url in memory and adding each of these document to zip file and make zip file downloadable.
Any help will be appreciated.
Thank you Cbroe for commenting. I figured the answer. The problem was I was reading the pdf from the url and convert it to a memory stream and then was trying to add the memory stream to ZipArchive which was not working but instead I extracted the byte array out of the memory stream and then added it to the zip archive and it worked.
Here is the code snippet that might be useful for some one. My first contribution to Stack OverFlow.
public FileResult DownloadZip()
{
MemoryStream memoryStream = new MemoryStream();
using (var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create, true))
{
var demoFile = archive.CreateEntry("Pdf123.pdf");
var convertedStream = ConvertTobyte("http://www.example.com/Pdf123.pdf");
using (var entryStream = demoFile.Open())
{
entryStream.Write(convertedStream, 0, convertedStream.Length);
}
demoFile = archive.CreateEntry("Pdf456.pdf");
convertedStream = ConvertTobyte("http://www.example.com/Pdf456.pdf");
using (var entryStream = demoFile.Open())
{
entryStream.Write(convertedStream, 0, convertedStream.Length);
}
}
//This option is to write the zip to your local disk
using (var fileStream = new FileStream(#"C:\Temp\test.zip", FileMode.Create))
{
memoryStream.Seek(0, SeekOrigin.Begin);
memoryStream.CopyTo(fileStream);
}
//This option is to donload the zip via browser
memoryStream.Seek(0, SeekOrigin.Begin);
return new FileStreamResult(memoryStream, "application/zip")
{
FileDownloadName = "Archive.zip"
};
}
private static byte[] ConvertTobyte(string fileUrl)
{
byte[] imageData = null;
using (var wc = new System.Net.WebClient())
imageData = wc.DownloadData(fileUrl);
return imageData;
}
Where can i find folder with installed modern ui apps? Im developing some app which uses .txt files to store information (win8 doesnot support datebase on arm - facepalm) but they seem to not work properly - thats why i want to access them.
Thanks!
That is not the correct way of doing things in Metro. I assume you mean db files, or txt files. Simply access the local text file from the project folder.
Here is a great tutorial on how you would go about doing so: http://www.codeproject.com/Articles/432876/Windows-8-The-Right-Way-to-Read-Write-Files-in-Win
An example:
private async void ProjectFile()
{
// settings
var _Path = #"Metro.Helpers.Tests\MyFolder\MyFolder.txt";
var _Folder = Windows.ApplicationModel.Package.Current.InstalledLocation;
// acquire file
var _File = await _Folder.GetFileAsync(_Path);
Assert.IsNotNull(_File, "Acquire file");
// read content
var _ReadThis = await Windows.Storage.FileIO.ReadTextAsync(_File);
Assert.AreEqual("Hello world!", _ReadThis, "Contents correct");
}
I have been trying to find the best way to do this I have thought of extracting the contents of the .jar then moving the files into the directory then putting it back as a jar. Im not sure is the best solution or how I will do it. I have looked at DotNetZip & SharpZipLib but don't know what one to use.
If anyone can give me a link to the code on how to do this it would be appreciated.
For DotNetZip you can find very simple VB.NET examples of both creating a zip archive and extracting a zip archive into a directory here. Just remember to save the compressed file with extension .jar .
For SharpZipLib there are somewhat more comprehensive examples of archive creation and extraction here.
If none of these libraries manage to extract the full JAR archive, you could also consider accessing a more full-fledged compression software such as 7-zip, either starting it as a separate process using Process.Start or using its COM interface to access the relevant methods in the 7za.dll. More information on COM usage can be found here.
I think you are working with Minecraft 1.3.1 no? If you are, there is a file contained in the zip called aux.class, which unfortunately is a reserved filename in windows. I've been trying to automate the process of modding, while manipulating the jar file myself, and have had little success. The only option I have yet to explore is find a way to extract the contents of the jar file to a temporary location, while watching for that exception. When it occurs, rename the file to a temp name, extract and move on. Then while recreating the zip file, give the file the original name in the archive. From my own experience, SharZipLib doesnt do what you need it do nicely, or at least I couldnt figure out how. I suggest using Ionic Zip (Dot Net Zip) instead, and trying the rename route on the offending files. In addition, I also posted a question about this. You can see how far I got at Extract zip entries to another Zip file
Edit - I tested out .net zip more (available from http://dotnetzip.codeplex.com/), and heres what you need. I imagine it will work with any zip file that contains reserved file names. I know its in C#, but hey cant do all the work for ya :P
public static void CopyToZip(string inArchive, string outArchive, string tempPath)
{
ZipFile inZip = null;
ZipFile outZip = null;
try
{
inZip = new ZipFile(inArchive);
outZip = new ZipFile(outArchive);
List<string> tempNames = new List<string>();
List<string> originalNames = new List<string>();
int I = 0;
foreach (ZipEntry entry in inZip)
{
if (!entry.IsDirectory)
{
string tempName = Path.Combine(tempPath, "tmp.tmp");
string oldName = entry.FileName;
byte[] buffer = new byte[4026];
Stream inStream = null;
FileStream stream = null;
try
{
inStream = entry.OpenReader();
stream = new FileStream(tempName, FileMode.Create, FileAccess.ReadWrite);
int size = 0;
while ((size = inStream.Read(buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, size);
}
inStream.Close();
stream.Flush();
stream.Close();
inStream = new FileStream(tempName, FileMode.Open, FileAccess.Read);
outZip.AddEntry(oldName, inStream);
outZip.Save();
}
catch (Exception exe)
{
throw exe;
}
finally
{
try { inStream.Close(); }
catch (Exception ignore) { }
try { stream.Close(); }
catch (Exception ignore) { }
}
}
}
}
catch (Exception e)
{
throw e;
}
}
I've been trying to read a pre-built file with Car Maintenance tips, there's one in each line of my "Tips.txt" file. I've tried to follow around 4 or 5 different approaches but It's not working, it compiles but I get an exception. Here's what I've got:
using (IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication())
{
using (StreamReader sr = new StreamReader(store.OpenFile("Tips.txt", FileMode.Open, FileAccess.Read)))
{
string line;
while ((line = sr.ReadLine()) != null)
{
(App.Current as App).MyTips.Insert(new DoubleNode(line));
}
}
}
I'm getting this "Operation not permitted on IsolatedStorageFileStream", from the info inside the 2nd using statement. I tried with the build action of my "Tips.txt" set to resource, and content, yet I get the same result.
Thanks in advance.
Since you've added it to your project directory, you can't read it using Isolated Storage methods. There are various ways you can load the file. One way would be to set the text file's build type to Resource, then read it in as a stream:
//Replace 'MyProject' with the name of your XAP/Project
Stream txtStream = Application.GetResourceStream(new Uri("/MyProject;component/myTextFile.txt",
UriKind.Relative)).Stream;
using(StreamReader sr = new StreamReader(txtStream))
{
//your code
}
How can I get the list of all DLL dependencies of a given DLL or EXE file?
In other words, I'd like to do the same as the "Dependency walker" tool, but programmatically.
What is the Windows (ideally .NET) API for that?
You can use EnumProcessModules function. Managed API like kaanbardak suggested won't give you a list of native modules.
For example see this page on MSDN
If you need to statically analyze your dll you have to dig into PE format and learn about import tables. See this excellent tutorial for details.
NOTE: Based on the comments from the post below, I suppose this might miss unmanaged dependencies as well because it relies on reflection.
Here is a small c# program written by Jon Skeet from bytes.com on a .NET Dependency Walker
using System;
using System.Reflection;
using System.Collections;
public class DependencyReporter
{
static void Main(string[] args)
{
//change this line if you only need to run the code one:
string dllToCheck = #"";
try
{
if (args.Length == 0)
{
if (!String.IsNullOrEmpty(dllToCheck))
{
args = new string[] { dllToCheck };
}
else
{
Console.WriteLine
("Usage: DependencyReporter <assembly1> [assembly2 ...]");
}
}
Hashtable alreadyLoaded = new Hashtable();
foreach (string name in args)
{
Assembly assm = Assembly.LoadFrom(name);
DumpAssembly(assm, alreadyLoaded, 0);
}
}
catch (Exception e)
{
DumpError(e);
}
Console.WriteLine("\nPress any key to continue...");
Console.ReadKey();
}
static void DumpAssembly(Assembly assm, Hashtable alreadyLoaded, int indent)
{
Console.Write(new String(' ', indent));
AssemblyName fqn = assm.GetName();
if (alreadyLoaded.Contains(fqn.FullName))
{
Console.WriteLine("[{0}:{1}]", fqn.Name, fqn.Version);
return;
}
alreadyLoaded[fqn.FullName] = fqn.FullName;
Console.WriteLine(fqn.Name + ":" + fqn.Version);
foreach (AssemblyName name in assm.GetReferencedAssemblies())
{
try
{
Assembly referenced = Assembly.Load(name);
DumpAssembly(referenced, alreadyLoaded, indent + 2);
}
catch (Exception e)
{
DumpError(e);
}
}
}
static void DumpError(Exception e)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Error: {0}", e.Message);
Console.WriteLine();
Console.ResetColor();
}
}
To get native module dependencies, I believe it should be ok to get it from the PE file's import table, here are 2 links which explain that in-depth:
http://msdn.microsoft.com/en-us/magazine/bb985992.aspx
http://msdn.microsoft.com/en-us/magazine/cc301808.aspx
To get .NET dependencies, we can use .NET's API, like Assembly.Load.
To get a .NET module's all dependencies, How about combine the 2 ways - .NET assemblies are just PE file with meta data.
While this question already has an accepted answer, the documentation referenced in the other answers, where not broken, is old. Rather than reading through all of it only to find it doesn't cover differences between Win32 and x64, or other differences, my approach was this:
C:\UnxUtils\usr\local\wbin>strings.exe E:\the-directory-I-wanted-the-info-from\*.dll > E:\TEMP\dll_strings.txt
This allowed me to use Notepad++ or gvim or whatever to search for dlls that were still depending on MS dlls with 120.dll at the end of the dll name so I could find the ones that needed updating.
This could easily be scripted in your favorite language.
Given that my search for this info was with VS 2015 in mind, and this question was the top result for a Google search, I supply this answer that it may perhaps be of use to someone else who comes along looking for the same thing.
To read the DLL's (modules) loaded by a running exe, use the ToolHelp32 functions
Tool help Documentation on MSDN.
Not sure what it will show for a .Net running exe (I've never tried it). But, it does show the full path from where the DLL's were loaded. Often, this was the information I needed when trying to sort out DLL problems. .Net is supposed to have removed the need to use these functions (look up DLL Hell for more information).
If you don't want to load the assembly in your program, you can use DnSpy (https://www.nuget.org/packages/dnSpyLibs):
var assemblyDef = dnlib.DotNet.AssemblyDef.Load("yourDllName.dll");
var dependencies = assemblyDef.ManifestModule.GetAssemblyRefs();
Notice that you have all the infos you can want in the "ManifestModule" property.