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Xceed .NET Libraries Documentation
Welcome to Xceed Data Manipulation Compoents for .NET and .NET Standard / Basic Concepts / Zip and streaming capabilities / Unzipping / Extracting items from a generic stream

In This Topic
    Extracting items from a generic stream
    In This Topic

    The following example demonstrates how to extract the contents of a zip file which is located in the resources of an application using the StreamFile class. The StreamFile class implements access to any type of stream as though it were a file.

    Basic steps

    To extract the contents of a zip file located in an application's resources, the following steps must be performed:

    • Create a stream that accesses a zip file contained within the resources of an application This is done using the .NET Framework's GetManifestResourceStream method. 

    • Initrialize a new instance of the StreamFile class around the stream that accesses the zip file in the resources of the application specifying the name by which to access the zip file. 

    • Retrieve a reference to the zip file in the resources using the ZipArchive class. 

    • Retrieve a reference to a folder where the files will be extracted to using either the DiskFolder, ZippedFolder, ZipArchive, MemoryFolder or IsolatedFolder classes.   With Xceed Zip for .NET, a folder is a folder; it does not matter if it is located within a zip file, on disk or in memory. 

    • Copy the files from the zip file to a destination folder using the CopyFilesTo method.  With Xceed Zip for .NET, a folder is a folder; it does not matter if it is located within a zip file, on disk or in memory.

    Demonstration

    The following example demonstrates how to extract files from a zip file located in an application's resources.

    VB.NET Copy Code

    Imports Xceed.FileSystem
    Imports Xceed.Zip

    Dim resources As Stream = Me.GetType().Assembly.GetManifestResourceStream( "Resources.zip" )
    Dim file As New StreamFile( resources, "Resources.zip" )
    Dim zip As New ZipArchive( file )
    Dim destinationFolder As New DiskFolder( "d:\Destination" )            

    ' Copy files from the zip file contained within the resources to a local folder.
    zip.CopyFilesTo( destinationFolder, false, true )

    C# Copy Code

    using Xceed.FileSystem;
    using Xceed.Zip;

    Stream resources = this.GetType().Assembly.GetManifestResourceStream( "Resources.zip" );
    StreamFile file = new StreamFile( resources, "Resources.zip" );
    ZipArchive zip = new ZipArchive( file );
    DiskFolder destinationFolder = new DiskFolder( @"d:\Destination" ); 

    zip.CopyFilesTo( destinationFolder, false, true );

    Things you should consider

    The main questions you should ask yourself when copying items to a zip file are:

    • Do you want to filter (specify specific files and folders) the items that are to be unzipped? Use filters. 

    • Do you want to display the status of the operation? See the Events topic. 

    • Do you only want to copy a specific file or folder? Use the CopyTo method.          

    • Do you want to move items rather than copy them? Use the MoveTo and MoveFilesTo methods.      

     

     

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