Bot Framework，提示选择对象列表

Question

我想在用户搜索窗口小部件后询问用户想要使用哪个窗口小部件，这会生成一个窗口小部件列表。我希望能够点击小部件的名称，然后获取小部件的URL。当我运行下面的代码时，我得到了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

你缺少一个context.Wait你OnWidgetSelected方法结束。

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. 
}