c# Bot Framework client and Server timezone difference

问题

I create a chatbot using MS bot framework where initially i will send a welcome message like "Good morning UserName" but my bot is hosted in azure and i user DateTime.Now to find the time of the day and provide the greeting message accordingly. But if some user from different timezone uses "Good morning " and "Good afternoon" messages are not appropriate.

How can i overcome this?

if (DateTime.Now.Hour < 12)
{
    await context.PostAsync("Good Morning");
}
else if (DateTime.Now.Hour > 12 and DateTime.Now.Hour < 17)
{
    await context.PostAsync("Good Afternoon");
}
else
{
    await context.PostAsync("Good Evening");
}

回答1:

If you embed webchat in your website, as Matt mentioned in comment, you can use the backchannel mechanism to pass TimezoneOffset from JavaScript client to your bot application to achieve your requirement.

In JavaScript client:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <link href="https://cdn.botframework.com/botframework-webchat/latest/botchat.css" rel="stylesheet" />
    <script src="https://cdn.botframework.com/botframework-webchat/latest/botchat.js"></script>
    <style>
        .wc-chatview-panel {
            width: 350px;
            height: 500px;
            position: relative;
        }
    </style>
</head>
<body>
    <div id="bot" />
</body>
</html>
<script>
    var botConnection = new BotChat.DirectLine({ secret: "{directline_secret}" }); 

    var d = new Date();
    var tzoffset = d.getTimezoneOffset();

    BotChat.App({
        botConnection: botConnection,
        user: { id: 'userid' },
        bot: { id: 'fehanbotdg' },
        resize: 'detect'
    }, document.getElementById("bot"));


    botConnection.postActivity({
        type: 'event',
        from: { id: 'userid'},
        name: 'ClientTimezoneOffsetEvent',
        value: tzoffset.toString()
    }).subscribe(function (id) { console.log('ClientTimezoneOffset: "' + tzoffset + '" sent'); });
</script>

In bot application MessagesController:

private Activity HandleSystemMessage(Activity message)
{
    if (message.Type == ActivityTypes.DeleteUserData)
    {
        // Implement user deletion here
        // If we handle user deletion, return a real message
    }
//......
//code logic for other messages types
    //......
    else if (message.Type == ActivityTypes.Event && message.Name == "ClientTimezoneOffsetEvent") {

        int timezoneOffset = Convert.ToInt32(message.Value);

        var client = new ConnectorClient(new Uri(message.ServiceUrl), new MicrosoftAppCredentials());

        timezoneOffset = Convert.ToInt32(message.Value);

        DateTime newDate = DateTime.UtcNow - new TimeSpan(timezoneOffset / 60, timezoneOffset % 60, 0);

        var greeting = "";

        if (newDate.Hour < 12)
        {
            greeting = "Good Morning";
        }
        else if (newDate.Hour > 12 & newDate.Hour <= 17)
        {
            greeting = "Good Afternoon";
        }
        else if (newDate.Hour > 17 & newDate.Hour <= 24)
        {
            greeting = "Good Evening";
        }

        var reply = message.CreateReply();

        reply.Text = $"{greeting}! UTC time: {DateTime.UtcNow}; Client time: {newDate}";

        client.Conversations.ReplyToActivityAsync(reply);
    }

    return null;
}

Test result:

来源：https://stackoverflow.com/questions/50396878/c-sharp-bot-framework-client-and-server-timezone-difference

标签

.net

botframework