Upload large files to SharePoint Online library with graph api using c# code

Question

I am reading this article to uplaod large files to library in sharepoint site: https://learn.microsoft.com/en-us/graph/api/driveitem-createuploadsession?view=graph-rest-1.0.

But there is no C# demo code in the documentation, can anyone provide an example for me?

Thanks in advance
Kelly

Answer 1

Hi @Kelly ,

Please refer to this post: https://stackoverflow.com/questions/49776955/how-to-upload-a-large-document-in-c-sharp-using-the-microsoft-graph-api-rest-cal

Create upload session

// Create upload session   
// POST /v1.0/drive/items/01KGPRHTV6Y2GOVW7725BZO354PWSELRRZ:/SWEBOKv3.pdf:/microsoft.graph.createUploadSession  
var uploadSession = await graphClient.Drive.Items[itemId].ItemWithPath("SWEBOK.pdf").CreateUploadSession().Request().PostAsync();  

Create the task

// Create task  
var maxChunkSize = 320 * 1024; // 320 KB - Change this to your chunk size. 5MB is the default.  
var largeFileUpload = new LargeFileUpload(uploadSession, graphClient, stream, maxChunkSize);  

Create upload monitor

public class MyProgress : IProgressCallback  
{  
    public void OnFailure(ClientException clientException)  
    {  
        Console.WriteLine(clientException.Message);  
    }  
  
    public void OnSuccess(DriveItem result)  
    {  
        Console.WriteLine("Download completed with id below");  
        Console.WriteLine(result.Id);  
    }  
  
    public void UpdateProgress(long current, long max)  
    {  
        long percentage = (current * 100) / max ;  
        Console.WriteLine("Upload in progress. " + current + " bytes of " + max + "bytes. " + percentage + " percent complete");  
    }  
}  

Upload the file

uploadedFile = await largeFileUpload.ResumeAsync(new MyProgress());  

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