您好,我在这两个对话框中收到 Stackoverflow 异常。Dialog A
正在从主对话框类中调用。对话框A有一个选择去Dialog A child
and Dialog A child
有选择回去Dialog A
。但它遇到了 Stackoverflow 异常。当我从另一个中删除一个时:示例删除Dialog A child
from Dialog A
或删除Dialog A
from Dialog A child
,异常错误消失。简而言之,当两个对话框可以互相调用时,它会抛出 Stackoverflow 异常。
我知道我可以EndDialogAsync
在这个特定场景中返回Dialog A
但我真正的对话流程并不是这样在一起的
。如何解决这个问题?
对话框A代码:
public class DialogA : ComponentDialog
{
private const string InitialId = "dialogA";
private const string ChoicePrompt = "choicePrompt";
private const string DialogAchildId = "dialogA_childId";
public DialogA(string dialogId)
: base(dialogId)
{
InitialDialogId = InitialId;
WaterfallStep[] waterfallSteps = new WaterfallStep[]
{
FirstStepAsync,
SecondStepAsync,
ThirdStepAsync,
};
AddDialog(new WaterfallDialog(InitialId, waterfallSteps));
AddDialog(new ChoicePrompt(ChoicePrompt));
AddDialog(new DialogA_child(DialogAchildId));
}
private static async Task<DialogTurnResult> FirstStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken = default(CancellationToken))
{
return await stepContext.PromptAsync(
ChoicePrompt,
new PromptOptions
{
Prompt = MessageFactory.Text($"Here are your choices:"),
Choices = new List<Choice>{new Choice { Value = "Open Dialog A_Child", }, new Choice { Value = "Open Dialog B_Child" }, },
RetryPrompt = MessageFactory.Text($"Please choose one of the options."),
});
}
private static async Task<DialogTurnResult> SecondStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken = default(CancellationToken))
{
var response = (stepContext.Result as FoundChoice)?.Value.ToLower();
if (response == "open dialog a_child")
{
return await stepContext.BeginDialogAsync(DialogAchildId, cancellationToken: cancellationToken);
}
return await stepContext.NextAsync();
}
private static async Task<DialogTurnResult> ThirdStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken = default(CancellationToken))
{
return await stepContext.EndDialogAsync();
}
对话框A子代码:
public class DialogA_child : ComponentDialog
{
private const string InitialId = "dialogAchild";
private const string ChoicePrompt = "choicePrompt";
private const string DialogAId = "dialogAId";
public DialogA_child(string dialogId)
: base(dialogId)
{
InitialDialogId = InitialId;
WaterfallStep[] waterfallSteps = new WaterfallStep[]
{
FirstStepAsync,
SecondStepAsync,
};
AddDialog(new WaterfallDialog(InitialId, waterfallSteps));
AddDialog(new DialogA(DialogAId));
}
private static async Task<DialogTurnResult> FirstStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken = default(CancellationToken))
{
return await stepContext.PromptAsync(
ChoicePrompt,
new PromptOptions
{
Prompt = MessageFactory.Text($"Here are your choices:"),
Choices = new List<Choice> {new Choice { Value = "Open Dialog A" }, new Choice { Value = "Open Dialog B" }, },
RetryPrompt = MessageFactory.Text($"Please choose one of the options."),
});
}
private static async Task<DialogTurnResult> SecondStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken = default(CancellationToken))
{
var response = (stepContext.Result as FoundChoice)?.Value.ToLower();
if (response == "open dialog a")
{
return await stepContext.BeginDialogAsync(DialogAId, cancellationToken: cancellationToken);
}
return await stepContext.NextAsync();
}
调用对话框A的主要代码:
public class MainDialog : ComponentDialog
{
private const string InitialId = "mainDialog";
private const string ChoicePrompt = "choicePrompt";
private const string DialogAId = "dialogAId";
public MainDialog(string dialogId)
: base(dialogId)
{
InitialDialogId = InitialId;
WaterfallStep[] waterfallSteps = new WaterfallStep[]
{
FirstStepAsync,
SecondStepAsync,
ThirdStepAsync,
};
AddDialog(new WaterfallDialog(InitialId, waterfallSteps));
AddDialog(new ChoicePrompt(ChoicePrompt));
AddDialog(new DialogA(DialogAId));
}
private static async Task<DialogTurnResult> FirstStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken = default(CancellationToken))
{
return await stepContext.PromptAsync(
ChoicePrompt,
new PromptOptions
{
Prompt = MessageFactory.Text($"Here are your choices:"),
Choices = new List<Choice>{ new Choice { Value = "Open Dialog A" }, new Choice { Value = "Open Dialog B" }, },
RetryPrompt = MessageFactory.Text($"Please choose one of the options."),
});
}
private static async Task<DialogTurnResult> SecondStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken = default(CancellationToken))
{
var response = (stepContext.Result as FoundChoice)?.Value.ToLower();
if (response == "open dialog a")
{
return await stepContext.BeginDialogAsync(DialogAId, cancellationToken: cancellationToken);
}
if (response == "open dialog b")
{
}
return await stepContext.NextAsync();
}
private static async Task<DialogTurnResult> ThirdStepAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken = default(CancellationToken))
{
return await stepContext.EndDialogAsync();
}