AdaptiveChoiceSetInput默认选中后取消勾选提交异常问题

问题描述 #

在Microsoft Teams中创建机器人，使用自适应卡片的多选复选框控件，默认选中两个选项，但取消其中一个并点击提交按钮时，系统判定所有复选框均未选中，触发必填校验提示。

问题原因 #

代码中给AdaptiveChoiceSetInput的Value属性赋值为逗号分隔的字符串"1,2"，但当IsMultiSelect = true时，多选复选框的Value应该是字符串数组类型，而非单个字符串。这种格式不匹配导致提交时控件无法正确识别剩余选中的选项，误判为未选中任何项。

修复后的代码 #

将chkBox.Value = "1,2";替换为字符串数组赋值：

var card = new AdaptiveCard("1.5");
AdaptiveChoice choice = new AdaptiveChoice();

var chkBox = new AdaptiveChoiceSetInput();
card.Body.Add(chkBox);
chkBox.Spacing = AdaptiveSpacing.Medium;
chkBox.IsMultiSelect = true;
chkBox.Style = AdaptiveChoiceInputStyle.Expanded;
chkBox.Id = "test";
chkBox.Wrap = true;
// 修改此处：用字符串数组设置默认选中项
chkBox.Value = new List<string> { "1", "2" };
chkBox.IsRequired = true;
chkBox.ErrorMessage = "please select at least one option.";

choice = new AdaptiveChoice();
choice.Title = "Red";
choice.Value = "1";
chkBox.Choices.Add(choice);

choice = new AdaptiveChoice();
choice.Title = "Orange";
choice.Value = "2";
chkBox.Choices.Add(choice);

AdaptiveAction action = new AdaptiveSubmitAction();
action.Type = "Action.Submit";
action.Title = texts["btnConfirm"];
action.AdditionalProperties.Add("data", new Dictionary<string, object>() { { "id", "Testingsss" } });
card.Actions.Add(action);

var act = MessageFactory.Attachment(new Attachment()
{
    Content = card,
    ContentType = AdaptiveCard.ContentType
});

await turnContext.SendActivityAsync(act);

说明 #

当启用多选（IsMultiSelect = true）时，AdaptiveChoiceSetInput的Value属性需要接收IList<string>类型的值，用来指定默认选中的选项集合。使用逗号分隔的字符串会导致控件解析错误，进而在提交时无法正确识别选中状态。

内容的提问来源于stack exchange，提问作者Swapnil Chowkekar