BlazorChatMessage.FunctionCalls Property

Returns information on all functions invoked by the AI model.

Namespace: DevExpress.AIIntegration.Blazor.Chat

Assembly: DevExpress.AIIntegration.Blazor.Chat.v25.2.dll

NuGet Package: DevExpress.AIIntegration.Blazor.Chat

Declaration

public List<AIChatFunctionCall> FunctionCalls { get; }

Property Value

Type	Description
List<AIChatFunctionCall>	The collection of function calls.

Remarks

The FunctionCalls collection contains information about all functions invoked in response to an AI chat message. Use this information to build custom message templates.

Note

If the same function is called more than once, the FunctionCalls collection contains a distinct item for each call.

The following code snippet appends function call information to the AI chat response. Details include the function name/unique identifier and the return value:

Razor

@using DevExpress.AIIntegration.Blazor.Chat
@using DevExpress.AIIntegration.Tools
@inject AIToolsContextContainer aiToolsContextContainer

<DxAIChat>
    <MessageContentTemplate>
        @context.Content
        @if(context.FunctionCalls.Count > 0) {
            <ul>
                @foreach(var functionCall in context.FunctionCalls) {
                    <li>
                        Called function: <b>@functionCall.Request.Name</b><br />
                        Return value: <b>@functionCall.Result.Result.ToString()</b>
                    </li>
                }
            </ul>
        }
    </MessageContentTemplate>
</DxAIChat>

@code {
    protected override void OnAfterRender(bool firstRender) {
        if(firstRender) {
            var context = new AIToolsContextBuilder()
                .WithToolMethods(MyAITools.Greet, MyAITools.AddNumbers)
                .Build();
            aiToolsContextContainer.Add(context);
        }
    }
}

AI Tools

using DevExpress.AIIntegration;
using System.ComponentModel;

public class MyAITools
{
    [AIIntegrationTool("Generic_Greeting")]
    [Description("Greets a user with their name.")]
    public static string Greet(
        [Description("The name of the user.")] string name) {
        var now = DateTime.Now;
        if(now.Hour < 7)
            return $"Good night, {name}!";
        else if(now.Hour < 12)
            return $"Good morning, {name}!";
        else if(now.Hour < 18)
            return $"Good afternoon, {name}!";
        else
            return $"Good evening, {name}!";
    }

    [AIIntegrationTool("Generic_Calculator")]
    [Description("Adds two numbers.")]
    public static int AddNumbers(
        [Description("First number")] int a,
        [Description("Second number")] int b) {
        return a + b;
    }
}

Program.cs

using Azure.AI.OpenAI;
using DevExpress.AIIntegration;
using DxAI.Components;
using Microsoft.Extensions.AI;
using System.ClientModel;

/* ... */

string azureOpenAiKey = Environment.GetEnvironmentVariable("AZURE_OPENAI_KEY")
    ?? throw new InvalidOperationException("AZURE_OPENAI_KEY environment variable is not set.");
string azureOpenAiEndpoint = Environment.GetEnvironmentVariable("AZURE_OPENAI_ENDPOINT")
    ?? throw new InvalidOperationException("AZURE_OPENAI_ENDPOINT environment variable is not set.");
string azureOpenAiModel = Environment.GetEnvironmentVariable("AZURE_OPENAI_MODEL")
    ?? throw new InvalidOperationException("AZURE_OPENAI_MODEL environment variable is not set.");
AzureOpenAIClient azureOpenAIClient = new(
      new Uri(azureOpenAiEndpoint),
      new ApiKeyCredential(azureOpenAiKey)
);
IChatClient azureOpenAIChatClient = azureOpenAIClient.GetChatClient(azureOpenAiModel).AsIChatClient();
/** Register scoped chat client with DevExpress AI tool calling */
builder.Services.AddScoped((sp) => {
    return azureOpenAIChatClient.AsBuilder()
                                .UseDXTools()
                                .UseFunctionInvocation()
                                .Build(sp);
});
/** Register DevExpress AI services */
builder.Services.AddDevExpressAI();
/** Register DevExpress Blazor services */
builder.Services.AddDevExpressBlazor();