Asp net download zip file from server
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Introduction: Here I will explain how to download multiple files as zip files archive from server using asp.net Gridview in C, VB. NET or upload response. Add Header( content-disposition, attachment; filename= + output File Name using ( Zip File zipfile = new Zip File zipfile. Add Selected Files( *.*, folder Name, include Sub Folders zipfile. Save(response. Output Stream.
This short article examines the baffling issue that a lot of people seem to encounter when attempting to send multiple files to the client from an ASP. NET application, and provides the solution. Every so often a question pops up on the forum asking why their multiple file download code only sends the first file. Typically, the code consists of a loop that iterates a collection of files and attempts to use Response. Transmit File or a File Result in MVC to dispatch each file to the client. The reason why this doesn't appear to work is because it is basically not possible. This isn't supported for security reasons. The potential exploit that enabling this scenario would open is known as a Drive-by Download whereby a malicious webmaster could send a whole load of malware to the client in addition to the requested file. The workaround is to compress the files into one archive file, and download that instead. There are quite a few examples that show how to do this using a variety of third party zip libraries. That's mainly because there was nothing specifically designed for this in the. NET framework until some new stuff was introduced in System. IO. Compression in. NET 4.5, specifically the Zip File class that enables you to create and work with.zip files. The simple examples that follow illustrates the use of the Zip File. Create From Directory method in ASP. NET MVC and Web Forms. In both cases, the user is presented with a list of checkboxes representing a selection of files to choose from. Submitting the form will result in just those files being packaged up into one zip file and downloaded. ASP. NET MVC The list of files is passed to the view via View Bag: public Action Result Index View Bag. Files = Directory. Enumerate Files( Server. Map Path( ~/pdfs return View The files are listed within a form with a set of checkboxes:
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@using( Html. Begin Form(.We are going to create a new zip file, add some files and then send it to the browser for download by using the Dot Net Zip/ Ionic lib Θα δημιουργήσουμε ένα.