如何在我键入退出或取消的每一刻中断表单流?

Question

我正在使用BotFramework在.Net C#中创建一个聊天机器人。在我的一个对话框中，当我开始填写表单流时，我无法退出流表单，直到我将填充所有流的那一刻。存在退出和离开形式的可能性吗？

这是我的代码：

路易斯对话框.cs ：

[LuisIntent("balance")]
public async Task balance(IDialogContext context, LuisResult result)
{
var balanca = new FormDialog<BalanceForm>(
new BalanceForm(),
BalanceForm.BuildForm,
FormOptions.PromptInStart,
result.Entities);
context.Call<BalanceForm>(balanca, BalanceCompleted);

平衡形式.cs

namespace BasicMultiDialog
{
[Serializable]
public class BalanceForm
{
[Prompt("What is your contract number?")]
public string contract;
public static IForm<BalanceForm> BuildForm()
{
OnCompletionAsyncDelegate<BalanceForm> wrapUpRequest = async 
(context, state) =>
{


string wrapUpMessage = "Dear " + house.Firstname + "," + "your  balance is " + house.Balance;
await context.PostAsync(wrapUpMessage);

}
};
return new FormBuilder<BalanceForm>().Message
("We have to ask you some information")

.Field(nameof(contract), validate: async (state, response) =>
{
var result = new ValidateResult();

return result;
}
})
.OnCompletion(wrapUpRequest)
//.Confirm("Are you sure: Yes or No ")
.Build();
}
}
}

Answer 1

实际上，取消表单很容易。如果您键入"帮助"或"选择"，您可以看到内置表单命令的列表，其中之一是"退出"。您可以使用许多术语来退出，例如"完成"或"再见"。如果要定义自己的术语，可以按如下方式配置表单命令：

var builder = new FormBuilder<BalanceForm>().Message
("We have to ask you some information")
.Field(nameof(contract), validate: async (state, response) =>
{
var result = new ValidateResult();
return result;
})
.OnCompletion(wrapUpRequest)
// Set the command term configuration on its own line
builder.Configuration.Commands[FormCommand.Quit].Terms = new[] { "exit", "cancel" };
return builder.Build();

请记住，当表单被取消时，会抛出一个FormCanceledException<T>。如果不希望显示类似"抱歉，我的机器人代码有问题"之类的消息，可以捕获如下所示的异常：

var balanca = new FormDialog<BalanceForm>(
new BalanceForm(),
BalanceForm.BuildForm,
FormOptions.PromptInStart,
result.Entities)
.Catch<BalanceForm, FormCanceledException<BalanceForm>>((dialog, ex) =>
{
// Handle the cancellation here and return an IDialog<BalanceForm>
});