Not working example for Dialogflow V2 api

问题

Experienced problems with C# SDK documentation which can be found here: http://googleapis.github.io/google-cloud-dotnet/docs/Google.Cloud.Dialogflow.V2/api/Google.Cloud.Dialogflow.V2.SessionsClient.html#Google_Cloud_Dialogflow_V2_SessionsClient_Create_Google_Api_Gax_Grpc_ServiceEndpoint_Google_Cloud_Dialogflow_V2_SessionsSettings_

No reference for method ToChannelCredentials(). We cannot connect the SDK to dialogflow, even with blank project. Is this method still existing or deprecated?

using Google.Cloud.Dialogflow.V2;
using Google.Apis.Auth.OAuth2;
using Grpc.Auth;
using Grpc.Core;
...
GoogleCredential cred = GoogleCredential.FromFile("/path/to/credentials.json");
Channel channel = new Channel(
    SessionsClient.DefaultEndpoint.Host, SessionsClient.DefaultEndpoint.Port, cred.ToChannelCredentials());
SessionsClient client = SessionsClient.Create(channel);
...
// Shutdown the channel when it is no longer required.
channel.ShutdownAsync().Wait();

回答1:

Have you tried connecting using the service account private key ? (Json file)

Follow these steps (working example in C#)

After you create a Dialogflow agent go to the agent's settings --> General --> click on the Service Account link
You will be sent to to google cloud platform where you can create a service account
After you create a service account, there will be an option to create a KEY, create it and download the (JSON) format of it
This key will be used to connect from your C# project to the Dialogflow agent
Install Google.Cloud.Dialogflow.V2 package in your project

Create for example a Dialogflow manager class (check below for an example)

    public class DialogflowManager {
    private string _userID;
    private string _webRootPath;
    private string _contentRootPath;
    private string _projectId;
    private SessionsClient _sessionsClient;
    private SessionName _sessionName;

    public DialogflowManager(string userID, string webRootPath, string contentRootPath, string projectId) {

        _userID = userID;
        _webRootPath = webRootPath;
        _contentRootPath = contentRootPath;
        _projectId = projectId;
        SetEnvironmentVariable();

    }

    private void SetEnvironmentVariable() {
        try {
            Environment.SetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS", _contentRootPath + "\\Keys\\{THE_DOWNLOADED_JSON_FILE_HERE}.json");
        } catch (ArgumentNullException) {
            throw;
        } catch (ArgumentException) {
            throw;
        } catch (SecurityException) {
            throw;
        }
    }

    private async Task CreateSession() {
        // Create client
        _sessionsClient = await SessionsClient.CreateAsync();
        // Initialize request argument(s)
        _sessionName = new SessionName(_projectId, _userID);

    }

    public async Task < QueryResult > CheckIntent(string userInput, string LanguageCode = "en") {
        await CreateSession();
        QueryInput queryInput = new QueryInput();
        var queryText = new TextInput();
        queryText.Text = userInput;
        queryText.LanguageCode = LanguageCode;
        queryInput.Text = queryText;

        // Make the request
        DetectIntentResponse response = await _sessionsClient.DetectIntentAsync(_sessionName, queryInput);
        return response.QueryResult;
    }
}

And then this can be called like this for example to get detect Intents

     DialogflowManager dialogflow = new DialogflowManager("{INSERT_USER_ID}",
    _hostingEnvironment.WebRootPath,
    _hostingEnvironment.ContentRootPath,
    "{INSERT_AGENT_ID");

var dialogflowQueryResult = await dialogflow.CheckIntent("{INSERT_USER_INPUT}");

来源：https://stackoverflow.com/questions/52934364/not-working-example-for-dialogflow-v2-api

标签

dialogflow