在我的表单确认对话框后自定义导航表单

Question

我在 FormBuilder 上定义了一个自定义 MessageDelegate 传递给 .Confirm(...)。（见屏幕截图。）

我的问题是我想自定义当用户在 Confirm 对话框中选择 "No" 时出现的导航菜单。我发现 this SO post 似乎在朝着正确的方向前进，但我想要更多的定制。我仍然希望显示按钮列表，但我希望能够指定哪些按钮 appear/don 不显示，以及每个按钮上的文本，而不是让 FormFlow 自动填充它。

例如：

在我的用例中，我有一个 HasMiddleName 字段，后跟一个 MiddleName 字段，只有在 HasMiddleName 字段收到 "Yes"回答。我希望导航仅显示 "Middle Name"，类似于它显示 First/Last 的方式。如果用户选择中间名，我希望它重定向到表单的 HasMiddleName 部分。
另一个调整是我希望能够格式化出生日期以仅显示 MM/dd/yyyy.

我尝试使用 Pattern language，但无法正常工作...我想要的可能吗？如果我手动创建对话框，我想展示如何将其与 FormFlow 的导航相关联？

Answer 1

导航步骤的自定义有点棘手，因此我想出了一个解决方案来解决这个问题。诀窍是确保 MiddleName 字段在导航步骤滚动时处于非活动状态，并将 HasMiddleName 字段伪装成 MiddleName 字段，以便单击它会带您到HasMiddleName 字段。

// We want our HasMiddleName field to be treated as the "Middle Name" field for navigation purposes
[Describe("Middle Name"), Prompt("Does the dependent have a middle name?"), Template(TemplateUsage.NavigationFormat, "{&}({MiddleName})", FieldCase = CaseNormalization.None)]
public bool HasMiddleName { get; set; }

// I'm showing you how to use the "Unspecified" template but for some reason it doesn't work in the navigation step.
// Also, be careful about giving two fields the same description. It works in this case because of the tricks we're using.
[Optional, Describe("Middle Name"), Prompt("Please enter middle name {||}"), Template(TemplateUsage.NoPreference, "None"), Template(TemplateUsage.Unspecified, "None")]
public string MiddleName { get; set; }

[Template(TemplateUsage.NavigationFormat, "{&}({:d})", FieldCase = CaseNormalization.None)]
public DateTime DateOfBirth { get; set; }

public static IForm<MyClass> BuildForm()
{
    var builder = new FormBuilder<MyClass>()
        .Field(new FieldReflector<MyClass>(nameof(HasMiddleName)).SetNext((value, state) =>
        {
            // This NextDelegate will execute after the user enters a value for HasMiddleName
            bool didTheySayYes = (bool)value;
            // If MiddleName is inactive it will be skipped over
            state._isMiddleNameActive = didTheySayYes;

            if (didTheySayYes)
            {
                // We need to explicitly navigate to the MiddleName field
                // or else it will go back to the confirmation step
                // if a middle name had already been entered
                return new NextStep(new[] { nameof(MiddleName) });
            }
            else
            {
                // We want to clear the middle name in case one had been entered before
                state.MiddleName = null;
                // This will go to either the DateOfBirth field or the confirmation step
                // since the MiddleName field will be inactive in this case
                return new NextStep();
            }
        }))
        .Field(new FieldReflector<MyClass>(nameof(MiddleName)).SetActive(state => state._isMiddleNameActive))
        .Field(new FieldReflector<MyClass>(nameof(DateOfBirth)))
        .Confirm(async state =>
        {
            // We're making sure MiddleName is inactive at the confirmation step
            // so it won't be visible in the navigation step,
            // but since we're not changing the MiddleName field
            // it can still be retrieved from the form's result
            state._isMiddleNameActive = false;
            return new PromptAttribute("Ok. Is this correct? {||}");
        });

    return builder.Build();
}

// This private field isn't included in the form
private bool _isMiddleNameActive;

另一方面，如果您真的想控制导航步骤中显示的按钮，还有另一种途径可以探索。上面的代码应该能很好地为您服务，但我觉得我应该简单地提一下这个其他技巧，因为我写了一个 post 关于如何做到这一点。如果您制作自己的提示器，您可以检查 PromptAsync 委托中的字段名称是否等于 __navigation__，然后相应地生成一条消息。请记住，您仍然必须使用第一个解决方案中的一些来确保单击 "Middle Name" 会将您带到 HasMiddleName 字段。

在我的表单确认对话框后自定义导航表单

Customizing the Navigation Form after my form's confirmation dialog

c#

botframework

formflow