What is the reason why the ollama model tool call function does not support stream output?

[williamlzw]

What is the reason why the ollama model tool call function does not support stream output?
Microsoft.Extensions.AI.Ollama

[stephentoub]

To what are you referring? Can you share a repro?

[williamlzw]

using System.ComponentModel;
using Microsoft.Data.Sqlite;
using System.Text.Encodings.Web;
using System.Text.Json;
using Microsoft.Extensions.AI;

public class Program1
{
    public async static Task Main()
    {
        OllamaChatClient ollamaClient = new OllamaChatClient(new Uri("http://localhost:11434/"), "qwen3:32b");

        var client = new Microsoft.Extensions.AI.ChatClientBuilder(ollamaClient)
            .UseFunctionInvocation()
            .Build();

        ChatOptions chatOptions = new()
        {
            Tools = [AIFunctionFactory.Create(QueryDateTime), AIFunctionFactory.Create(SaveFile)]
        };
        ChatMessage chatMessage = new()
        {
            
        };
        await foreach(var res in client.GetStreamingResponseAsync("Query the current time and write the time text to d:/123.txt", chatOptions))//，
        {  
            Console.Write(res.Text);
        }
    }

    [Description("This method is used to query the current system time and return it in the format yyyy-MM-dd HH:mm:ss")]
    public static string QueryDateTime()
    {
        return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
    }

    [Description("This method is used to write the text content to the target file of the local computer")]
    public static void SaveFile(string filePath, string fileContent)
    {
        System.IO.File.WriteAllText(filePath, fileContent);
    }
}