How do I reference a file in a chat with an agent which uses the OpenAI Assistants API

[3052]

repost because it seems the original question was incorrectly closed

#5103

[moonbox3]

Hi @3052, in this OpenAIAssistantAgent sample, we show the process of uploading an image, and then providing the fileId as part of agent invocation:

semantic-kernel/dotnet/samples/GettingStartedWithAgents/OpenAIAssistant/Step03_Assistant_Vision.cs

Line 34 in 620d5f3

string fileId = await this.Client.UploadAssistantFileAsync(imageStream, "cat.jpg");

semantic-kernel/dotnet/samples/GettingStartedWithAgents/OpenAIAssistant/Step03_Assistant_Vision.cs

Line 46 in 620d5f3

await InvokeAgentAsync(CreateMessageWithImageReference("Is there an animal in this image?", fileId));

semantic-kernel/dotnet/samples/GettingStartedWithAgents/OpenAIAssistant/Step03_Assistant_Vision.cs

Lines 70 to 71 in 620d5f3

	private ChatMessageContent CreateMessageWithImageReference(string input, string fileId)
	=> new(AuthorRole.User, [new TextContent(input), new FileReferenceContent(fileId)]);