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Edit file xlsx from Onedrive

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148443 Oct 19,2019 05:30 PM UTC Oct 23,2019 01:48 PM UTC UWP 1
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Tags: XlsIO
Phan Minh Dang Khoa
Asked On October 19, 2019 05:30 PM UTC

I tried to edit a file on Ondrive via Microsoft Graph by downloading it for editing then uploading it again.
I encountered 2 problems as follows

"System.ArgumentException: 'Update mode requires a stream with read, write, and seek capabilities.'" for this code below.

ExcelEngine excelEngine = new ExcelEngine();
IApplication application = excelEngine.Excel;         
application.UseFastRecordParsing = true;
var stream = await graphClient.Me.Drive.Items["F90FCCBAC810EFDB!41667"].Content
                                                                       .Request()
                                                                       .GetAsync();
IWorkbook workbook = await application.Workbooks.OpenAsync(stream);


I tried to upload a file successfully but it was empty.

using (ExcelEngine excelEngine = new ExcelEngine())
            {
                FileOpenPicker openPicker = new FileOpenPicker();
                openPicker.SuggestedStartLocation = PickerLocationId.Desktop;
                openPicker.FileTypeFilter.Add(".xlsx");
                openPicker.FileTypeFilter.Add(".xls");
                StorageFile inputStorageFile = await openPicker.PickSingleFileAsync();
                Stream fileStream = (await inputStorageFile.OpenReadAsync()).AsStreamForRead();
                IWorkbook workbook = await excelEngine.Excel.Workbooks.OpenAsync(fileStream);
                workbook.Version = ExcelVersion.Excel2016;
                MemoryStream outputStream = new MemoryStream();
                await workbook.SaveAsAsync(outputStream);
                await graphClient.Me.Drive.Root.ItemWithPath(inputStorageFile.Name).Content
                .Request()
                .PutAsync<DriveItem>(outputStream);
            }

So how to solve these problems?

Konduru Keerthi Konduru Ravichandra Raju [Syncfusion]
Replied On October 23, 2019 01:48 PM UTC

Hi Phan, 

Greetings from Syncfusion. 

We have tried to reproduce the mentioned issues and found solution to resolve them. Please find the details below. 

Query 
Answer 
"System.ArgumentException: 'Update mode requires a stream with read, write, and seek capabilities.'" for this code below. 
We request you to copy the stream to MemoryStream and set stream.Postion = 0; before loading the file into IWorkbook, to resolve the issue. 

Code Snippet:  

ExcelEngine excelEngine = new ExcelEngine(); 
IApplication application = excelEngine.Excel; 
application.UseFastRecordParsing = true; 
 
var stream = await graphClient.Me.Drive.Root.ItemWithPath("Sample.xlsx").Content.Request().GetAsync(); 
stream.Position = 0; 
 
MemoryStream file = new MemoryStream(); 
stream.CopyTo(file); 
file.Position = 0; 
 
IWorkbook workbook = await application.Workbooks.OpenAsync(file); 
 
I tried to upload a file successfully but it was empty. 
We request you to set the stream position as 0 here also, before uploading the file to resolve the issue. 

Code Snippet: 

outputStream.Position = 0; 
await graphClient.Me.Drive.Root.ItemWithPath("Sample.xlsx").Content.Request().PutAsync<DriveItem>(outputStream); 
 

The sample we have tried at our end can be downloaded from the following link. 


Note: Please add the ApplicationID and use valid file name then execute the sample. 

Kindly try this and let us know if the issue is resolved. 

Regards, 
Keerthi. 


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