CODEWITHSUNDEEP
c#visual-studiosharepoint
user6580378
user6580378

Reputation:

Download a file from a specific library in Sharepoint

I have a simple console application that upload a file from a local folder to a library in sharepoint, and also have a method that download that folder, but using the url that is activated manually in the web site. But I need to download the same file that I upload a second later, it is for a test, AND WHAT I NEED IS TO ACTIVATE THE "VIEW LINK" FOR DOWNLOAD LATER. Here is my upload method:

  static void o365SaveBinaryDirect(ClientContext o365Context, string o365LibraryName, string o365FilePath, string o365FileName) {

        Web o365Web = o365Context.Web;
        if (!LibraryExist(o365Context, o365Web, o365LibraryName)) {
            CreateLibrary(o365Context, o365Web, o365LibraryName);
        }
        using (FileStream o365FileStream = new FileStream(o365FilePath, FileMode.Open)) {
            Microsoft.SharePoint.Client.File.SaveBinaryDirect(o365Context, string.Format("/{0}/{1}", o365LibraryName, o365FileName), o365FileStream, true);                
        }
    }

Now I have this method that download:

 private static void DownloadFile(string webUrl, ICredentials credentials, string fileRelativeUrl) {
        using (var client = new WebClient()) {
            client.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
            client.Headers.Add("User-Agent: Other");
            client.Credentials = credentials;
            client.DownloadFile(webUrl, fileRelativeUrl);

        }
    }

I need to generate the url for download the file later.

Upvotes: 1

Views: 4599

Answers (1)

Vadim Gremyachev
Vadim Gremyachev

Reputation: 59318

Some suggestions:

  • avoid generating file url based on library title since library url is not the same as library title
  • since Microsoft.SharePoint.Client.File.SaveBinaryDirect method from CSOM API is used for uploafding a file, consider to utilize Microsoft.SharePoint.Client.File.OpenBinaryDirect method for downloading a file

The following example demonstrates how to upload a file into a library and then downloading it:

var sourceFilePath = @"c:\in\UserGuide.pdf";  //local file path;
var listTitle = "Documents"; //target library;

var list = ctx.Web.Lists.GetByTitle(listTitle);
ctx.Load(list.RootFolder);
ctx.ExecuteQuery();

var targetFileUrl = string.Format("{0}/{1}", list.RootFolder.ServerRelativeUrl, Path.GetFileName(sourceFilePath));

//upload a file
using (var fs = new FileStream(sourceFilePath, FileMode.Open))
{
      Microsoft.SharePoint.Client.File.SaveBinaryDirect(ctx, targetFileUrl, fs, true);
}

//download a file
var downloadPath = @"c:\out\";
var fileInfo = Microsoft.SharePoint.Client.File.OpenBinaryDirect(ctx, targetFileUrl);
var fileName = Path.Combine(downloadPath, Path.GetFileName(targetFileUrl));
using (var fileStream = System.IO.File.Create(fileName))
{
      fileInfo.Stream.CopyTo(fileStream);
}

Upvotes: 2

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