[BUG] Image file upload throws exception while invoking image analysis

[justinyoo]

Describe the bug

• Docs link: https://platform.openai.com/docs/guides/images-vision?api-mode=responses&format=file
• While running the code sample, https://github.com/justinyoo/openai-dotnet/blob/docs/images-vision/docs/guides/images-vision/responses/analyze_images_passing_file.cs, it throws an exception like:

Unhandled exception. System.ClientModel.ClientResultException: HTTP 400 (invalid_request_error: )
Parameter: input

Invalid input: Expected file type to be a supported format: .pdf but got .png.

Steps to reproduce

1. Run this code: https://github.com/justinyoo/openai-dotnet/blob/docs/images-vision/docs/guides/images-vision/responses/analyze_images_passing_file.cs
2. See the error below:

Unhandled exception. System.ClientModel.ClientResultException: HTTP 400 (invalid_request_error: )
Parameter: input

Invalid input: Expected file type to be a supported format: .pdf but got .png.
   at OpenAI.ClientPipelineExtensions.ProcessMessage(ClientPipeline pipeline, PipelineMessage message, RequestOptions options)
   at OpenAI.Responses.OpenAIResponseClient.CreateResponse(BinaryContent content, RequestOptions options)
   at OpenAI.Responses.OpenAIResponseClient.CreateResponse(IEnumerable`1 inputItems, ResponseCreationOptions options, CancellationToken cancellationToken)
   at Program.<Main>$(String[] args) in C:\Users\justi\dev\gh\openai-dotnet\docs\guides\images-vision\responses\analyze_images_passing_file.cs:line 23
   at Program.<Main>(String[] args)

Code snippets

Here's the code snippet link: https://github.com/justinyoo/openai-dotnet/blob/docs/images-vision/docs/guides/images-vision/responses/analyze_images_passing_file.cs

OS

Windows

.NET version

.NET 10 RC1

Library version

2.4

[joseharriaga]

Thank you for reaching out, @justinyoo ! I believe the issue is that you're passing the image as a "input file part" (which only supports PDFs) instead of passing it as an "input image part". Specifically, I think you need to change this:

ResponseContentPart.CreateInputFilePart(file.Id),

For this:

ResponseContentPart.CreateInputImagePart(file.Id),

[jsquire]

As the image sample has merged, I'm going to assume that this has been resolved and close things out.