Alternative Save/OpenBinaryDirect methods for CSOM for SharePoint Online

Question

Based on the doc from MS
https://learn.microsoft.com/en-us/sharepoint/dev/sp-add-ins/using-csom-for-dotnet-standard

So for .NET core app, what is the alternative way to read/write files stored in SharePoint online? what is the regular file API? does anyone done this? any example code/documentation?

Answer 1

You could use the file.OpenBinaryStream() to read/write files stored in SharePoint, below is my demo code for your reference:

        Microsoft.SharePoint.Client.File file = context.Web.GetFileByUrl("https://tenant.sharepoint.com/sites/michael/Shared%20Documents/aa.txt");
        context.Load(file);
        context.ExecuteQuery();       

        Microsoft.SharePoint.Client.ClientResult<Stream> mstream = file.OpenBinaryStream();
        context.ExecuteQuery();

        using (System.IO.StreamReader sr = new System.IO.StreamReader(mstream.Value))
        {
          String line = sr.ReadToEnd();
          Console.WriteLine(line);
        }

Answer 2

Hi @10031103 ,

Welcome to Microsoft Q&A! Currently, Microsoft Q&A supports the products listed over here (more to be added later on).

Your question about Alternative Save/OpenBinaryDirect methods for CSOM for SharePoint Online is not yet supported on this platform. You could ask about this in the SharePoint Developers forums:https://techcommunity.microsoft.com/t5/sharepoint-developer/bd-p/SharePointDev

Thanks,

Grace

Answer 3

.NET Standard CSOM is now available as of June 23rd on NuGet. You should be able to use this CSOM binary with your .NET Core app.