Open/Create presentation in Azure function

[Frank Sposaro]

Hi all,

I'm trying to build a processing pipeline using Azure Logic App.

When a form response is received it will trigger an Azure function that will create a PPTX.

The function copies a template pptx to a memory stream from Azure storage blob, makes modifications, and then uploads the stream back to the blob.

However, I am running into issues opening the presentation from the stream.

Any Ideas?

            blob = container.GetBlockBlobReference("template.pptx");

            Stream inStream = new MemoryStream();

            blob.DownloadToStream(inStream);

            using (IPresentation pptxDoc = Presentation.Open(inStream))

            {

                /* Make modifications here */

               

                pptxDoc.Save(inStream);

                blob.UploadFromStream(inStream);

                return new HttpResponseMessage(HttpStatusCode.OK);

            }

[Karthikeyan Chandrasekar]

Hi Frank, 

We suspect different version of “Syncfusion.Licensing” assembly is referred in Azure Function sample, which gives error on runtime while opening or creating the Presentation using our Syncfusion Presentation library. Could you please ensure whether below referred assemblies are in same version?   

Syncfusion.Presentation 

Syncfusion.OfficeChart 

Syncfusion.Compression 

Syncfusion.Licensing 

Still if you are facing same error, please send us the stack trace of the error. So that we can proceed further in this and provide you a solution. 

Regards, 

Karthikeyan  

[Frank Sposaro]

You are correct. I dug deeper through the logs and found this error:

"Could not load file or assembly 'Syncfusion.Licensing, Version=16.4450.0.44, Culture=neutral, PublicKeyToken=123...321' or one of its dependencies. The system cannot find the file specified.

Please see the Sync Fusion versions I am using below. How can I get around this issue, which version should I be using? I double checked and there wasn't a nuget update for this.

[Karthikeyan Chandrasekar]

Hi Frank, 

Syncfusion.Presentation.AspNet.Mvc5 NuGet is compatible only with MVC application which is targeting framework 4.5. So if your application framework is different than 4.5 you should use the Syncfusion.Presentation.WinForms NuGet which will be compatible in 2.0, 3.0, 4.5, 4.5.1 and 4.6 frameworks.

By installing Syncfusion.Presentation.WinForms NuGet in your Azure Function application instead of Syncfusion.Presentation.AspNet.Mvc5 NuGet, you can resolve this issue.

Please let me know if you have any questions. 

Regards, 

Karthikeyan