编辑：

在查看源代码时，我在botbuilder.d.ts中发现了以下内容。似乎在瀑布中您不需要显式调用endDialog？

/* You can terminate a waterfall early by either falling through every step of the waterfall using
 * calls to `skip()` or simply not starting another prompt or dialog.
 *
 * __note:__ Waterfalls have a hidden last step which will automatically end the current dialog if
 * if you call a prompt or dialog from the last step. This is useful where you have a deep stack of
 * dialogs and want a call to [session.endDialog()](/en-us/node/builder/chat-reference/classes/_botbuilder_d_.session.html#enddialog)
 * from the last child on the stack to end the entire stack. The close of the last child will trigger
 * all of its parents to move to this hidden step which will cascade the close all the way up the stack.
 * This is typically a desired behavior but if you want to avoid it or stop it somewhere in the
 * middle you'll need to add a step to the end of your waterfall that either does nothing or calls
 * something like [session.send()](/en-us/node/builder/chat-reference/classes/_botbuilder_d_.session.html#send)
 * which isn't going to advance the waterfall forward.
 * @example
 * <pre><code>
 * var bot = new builder.BotConnectorBot();
 * bot.add('/',[
 *     function (session) {
 *         builder.Prompts.text(session,"Hi! What's your name?");
 *     },*     function (session,results) {
 *         if (results && results.response) {
 *             // User answered question.
 *             session.send("Hello %s.",results.response);
 *         } else {
 *             // User said never mind.
 *             session.send("OK. Goodbye.");
 *         }
 *     }
 * ]);
 * </code></pre>
 */

我正在学习MS Bot Framework版本3-这是他们在这里使用的版本。

我遵循瀑布工作原理（https://docs.microsoft.com/en-us/azure/bot-service/nodejs/bot-builder-nodejs-dialog-manage-conversation-flow?view=azure-bot-service-3.0）的概念，但是我不明白的是endDialog扮演什么角色。

例如，在我们使用的代码中，有一堆单独的对话框，它们的格式均为

module.exports = function showTickets() {
    this.bot.dialog('/showAllTickets',[
        async function showAllTicketsFn(session,args,next) {
            this.beginDialog.bind(this,'/showTickets')(session,next);
        }.bind(this)
    ]);
};

基本上，一个对话框正在加载另一个对话框（之间还有其他一些代码，例如在数据存储区中设置数据）。 endDialog无处可调用。但是在MS教程的示例中，每个瀑布都以某种形式的endDialog（endDialog或endDialogWithResults等结尾）。

使用beginDialog“打开”的每个对话框在完成瀑布之后，即运行在数组中传递给bot.dialog的函数时是否自动“关闭”自身？ （在上面的代码中，瀑布只是一步）。

何时需要明确呼叫endDialog？

感谢您的帮助！