Solved

How do I programmatically download a file from a specified URL?

Posted on 2008-10-03
4
332 Views
Last Modified: 2013-11-12
Hi Experts

I am looking for a snippet of code that will allow me to programmatically download a zip or xml file from a specified URL on the web. The code will have to work from a WPF program, so it is windows based. The URL and file will be on a domain that I administrate, so I will have full read/write access to the file. I will also want to save the file to a folder on the local C-drive.
0
Comment
Question by:Fritz41
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 55

Accepted Solution

by:
Jaime Olivares earned 200 total points
ID: 22639687
use the System.Net.WebClient class, like:

System.Net.WebClient Client = new System.Net.WebClient ();
Client.DownloadFile("http://www.yourdomain.com/yourfile.zip", @"c:\somefolder\yourfile.zip");
0
 

Expert Comment

by:esesjay4
ID: 22639696
Using a stream is the easiest and safest way to read a file on a client machine.  Hope this code helps:

Using Microsoft.Win32;
Using System.IO;
 
 
// Put this section of code in your function
 
/************ BEGIN ******************************************/
OpenFileDialog openDialog = new OpenFileDialog();
 
// Setup your file filters here
openDialog.Filter = "Text Files (*.txt)|*.txt|All files (*.*)|*.*";
 
// Variable that stores your file data
string fileData;
 
if (openDialog.ShowDialog() == true)
{
	using (Stream fileStream = openDialog.OpenFile())
	{
		int numBytesToRead = (int)fileStream.Length;
		byte[] bytes = new byte[numBytesToRead];
		int numBytesRead = 0;
		while (numBytesToRead > 0)
		{
			int n = fileStream.Read(bytes, numBytesRead, numBytesToRead);
			if (n == 0)
				break;
 
			numBytesRead += n;
			numBytesToRead -= n;
		}
		fileStream.Close();
 
                  // This variable has your file data.
		fileData = Encoding.ASCII.GetString(bytes);
	}
}
 
/************ END ******************************************/

Open in new window

0
 

Expert Comment

by:esesjay4
ID: 22639702
whoops...my code requires the user to actually select the file.  So this might not work for you...sorry.
0
 

Author Closing Comment

by:Fritz41
ID: 31502982
Thanks, this seems like exactly what I was looking for.
0

Featured Post

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Problem Hi all,    While many today have fast Internet connection, there are many still who do not, or are connecting through devices with a slower connect, so light web pages and fast load times are still popular.    If your ASP.NET page …
If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question