Re: Can you dynamically define a folder structure while streaming from ASP.NET?

Justin — Wed, 01 Jun 2011 13:17:45 GMT

I figured it out. The issue was the syntax for my destination pathing.

Here is the corrected code in full (changes called out in bold)

<code>

protected void btnDownload_Click(object sender, EventArgs e)
{
var fileList = new Dictionary<string, string>
{

{@"C:\Data\Files\1.txt", @"Examples\1.txt"}
, {@"C:\Data\Files\2.txt", @"Folder\2.txt"}
, {@"C:\Data\Files\3.txt", @"Yesterday\3.txt"}
};

Response.Clear();
Response.ClearHeaders();
Response.Expires = -1;
Response.Buffer = false;
Response.ContentType = "application/x-zip-compressed";
Response.AddHeader("Content-Disposition", "attachment;filename=Files.zip");

using (var zipWriter = new ZipWriter(Response.OutputStream))
{
foreach (var fileToCompress in fileList)
{
if (File.Exists(fileToCompress.Key) == false) continue;

var fileInfo = new FileInfo(fileToCompress.Key);
var zipItemLocalHeader = new ZipItemLocalHeader(fileToCompress.Value
, CompressionMethod.Deflated
, CompressionLevel.Normal); zipWriter.WriteItemLocalHeader(zipItemLocalHeader);

var buffer = new byte[1023];
using (var fileStream = fileInfo.OpenRead())
{
int read;
do
{
read = fileStream.Read(buffer, 0, buffer.Length); zipWriter.WriteItemData(buffer, 0, read); Response.Flush();
} while (read != 0 && Response.IsClientConnected);
}
}

zipWriter.CloseZipFile();
Response.Flush();
Response.End();

}

</code>

Can you dynamically define a folder structure while streaming from ASP.NET?

Justin — Fri, 20 May 2011 19:04:53 GMT

I'm attempting to zip and stream files from asp.net. I found the following post which works great:

http://xceed.com/CS/forums/permalink/13036/13034/ShowThread.aspx#13034

However during this process I would like to change the folder structure.
My goal is to minimize disk and memory usage.

Here is an example:

Given this DataSource:
<code>

var fileList = new Dictionary<string, string>

{

{@"C:\Data\Files\1.txt",@"C:\Examples\1.txt"},

{@"C:\Data\Files\2.txt",@"C:\Folder\2.txt"},

{@"C:\Data\Files\3.txt",@"C:\Yesterday\3.txt"}

};

<code>

And assuming my physical files

"C:\Data\Files\1.txt"
"C:\Data\Files\2.txt"
"C:\Data\Files\3.txt"

When the user finishes downloading the zip, I would like the folder structure to be:

"C:\Examples\1.txt"
"C:\Folder\2.txt"
"C:\Yesterday\3.txt"

How do I accomplish this?

Xceed Zip for .NET

Re: Can you dynamically define a folder structure while streaming from ASP.NET?

Can you dynamically define a folder structure while streaming from ASP.NET?