download file from sharepoint document library

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How to download files from sharepoint document library using asp.net c#

C#

string remoteUri = "http://remote-server name/folder name/";
           string fileName = "parapara2.jpg", myStringWebResource = null;
           // Create a new WebClient instance.
           WebClient myWebClient = new WebClient();
           // Concatenate the domain with the Web resource filename.
           myStringWebResource = remoteUri + fileName;
           Console.WriteLine("Downloading File \"{0}\" from \"{1}\" .......\n\n", fileName, myStringWebResource);
           // Download the Web resource and save it into the current filesystem folder.
           myWebClient.DownloadFile(myStringWebResource, fileName);

but this is not working.

Posted 7-Aug-12 1:44am

oliver grace

Updated 7-Aug-12 19:14pm

v2

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Comments

ZurdoDev 7-Aug-12 8:10am

There is a lot of code to be able to do this. There are samples on msdn. Have you looked there?

Sandeep Mewara 7-Aug-12 11:26am

Did you try anything?

2 solutions

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Christopher Drake · Answer 1 · 2012-09-12T08:53:00

Oliver -

If you code cannot use SharePoint and you are using ASP.Net you can use the following:

C#

//
// CopyStream is from 
// http://stackoverflow.com/questions/411592/how-do-i-save-a-stream-to-a-file
//
public static void CopyStream(Stream input, Stream output) { 
            byte[] buffer = new byte[8 * 1024]; 
            int len; 
            while ((len = input.Read(buffer, 0, buffer.Length)) > 0) { 
                output.Write(buffer, 0, len); 
            } 
        } 

        protected void Page_Load(object sender, EventArgs e)
        {
            string url = "https://myserver.com/test/Shared%20Documents/mypic.jpg";
            WebRequest request = WebRequest.Create(new Uri(url, UriKind.Absolute));
            request.UseDefaultCredentials = true;
            WebResponse response = request.GetResponse();
            Stream fs = response.GetResponseStream() as Stream;
            
            using (FileStream localfs = File.OpenWrite(@"c:\temp\aspdownloadedfile.jpg"))
            {
                CopyStream(fs, localfs);
            }
        }

If your code is located on the SharePoint server you can use the following code (add a reference to the SharePoint.dll):

C#

public string GetFileContents(string websiteUrl)
{
            string fileContentString = string.Empty;
            SPSite site = new SPSite(websiteUrl);
            if (site != null)
            {
                SPWeb web = site.OpenWeb();
                if (web != null)
                {
                    fileContentString = web.GetFileAsString(websiteUrl);
                    SPFile file = web.GetFile(websiteUrl);
                    
                }
                else
                {
                    Console.WriteLine("Could not open website {0}", websiteUrl);
                }
                site.Dispose();
            }
}
            return fileContentString;

Member 10268812 · Answer 2 · 2013-09-11T21:48:00

Solution 2

If the client account is already a valid user of the site you just need to use the default credentials before downloading, like so..

WebClient Client=new WebClient();
Client.UseDefaultCredentials=true;
Client.DownloadFile(url, destination);

Posted 11-Sep-13 21:48pm

Member 10268812

Comments

esb77 6-Nov-13 15:23pm

tried
WebClient Client=new WebClient();
Client.UseDefaultCredentials=true;
Client.DownloadFile(url, destination);

Worked fine with all kind of files except Doc Library Infopath forms
The output wasn't original file but in a rendered html format(?). Is it possible to download doc. library files