Bot Framework，提示选择对象列表

Question

我想问一个用户，它在搜索小部件后要使用哪个小部件，从而生成小部件列表。 我希望能够单击小部件的名称，然后获取小部件的URL。 当我运行以下代码时，我得到的需求是invalid need: expected Call, have Poll 。

public async Task SelectAfterSearch(IDialogContext context, List<Widget> widgetlist)
{
    PromptDialog.Choice(context, this.OnWidgetSelected, GetListOfWidgets("list"), "Which one do you want more information about?", "Not a valid option", 3);
}

public async Task OnWidgetSelected(IDialogContext context, IAwaitable<Widget> result)
{
    var chosen = await result;
    await context.PostAsync($"You have chosen {chosen.Name}: {chosen.Url}");
}

Answer 1

您缺少context.Wait在你结束OnWidgetSelected方法。

public async Task OnWidgetSelected(IDialogContext context, IAwaitable<Widget> result)
{
    var chosen = await result;
    await context.PostAsync($"You have chosen {chosen.Name}: {chosen.Url}");
    context.Wait(...) // => usually you Wait on the MessageReceived method.
}