Power Automate中Adaptive Card处理Microsoft Forms选择字段报错求助

问题根源 #

Microsoft Forms的多选字段返回的响应是字符串化的JSON数组（如示例中的id3字段值"[\"iOS\"]"），直接将该值插入Adaptive Card的text属性时，会破坏卡片的JSON结构，导致Teams解析时抛出JsonReaderException。

解决方案 #

方法1：将字符串数组转为纯文本（推荐） #

使用Power Automate内置函数先解析字符串为数组，再拼接为逗号分隔的文本：

• 替换Adaptive Card中操作系统字段的表达式：
  原表达式：@{outputs('Get_response_details')?['body/id#']}
  替换为：@{join(json(outputs('Get_response_details')?['body/id3']), ', ')}

修改后的完整Adaptive Card JSON

{
  "type": "AdaptiveCard",
  "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
  "version": "1.2",
  "body": [
    {"type": "TextBlock","text": "Title","size": "large","weight": "bolder","wrap": true},
    {"type": "TextBlock","text": "@{outputs('Get_response_details')?['body/id1']}","wrap": true},
    {"type": "TextBlock","text": "Description","size": "large","weight": "bolder","wrap": true},
    {"type": "TextBlock","text": "@{outputs('Get_response_details')?['body/id2']}","wrap": true},
    {"type": "TextBlock","text": "Operating System","size": "large","weight": "bolder","wrap": true},
    {"type": "TextBlock","text": "@{join(json(outputs('Get_response_details')?['body/id3']), ', ')}","wrap": true}
  ]
}

方法2：用列表样式展示多选结果（可选） #

如果需要更清晰的列表展示，可使用Adaptive Card的FactSet组件：

{
  "type": "AdaptiveCard",
  "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
  "version": "1.2",
  "body": [
    {"type": "TextBlock","text": "Title","size": "large","weight": "bolder","wrap": true},
    {"type": "TextBlock","text": "@{outputs('Get_response_details')?['body/id1']}","wrap": true},
    {"type": "TextBlock","text": "Description","size": "large","weight": "bolder","wrap": true},
    {"type": "TextBlock","text": "@{outputs('Get_response_details')?['body/id2']}","wrap": true},
    {"type": "TextBlock","text": "Operating System","size": "large","weight": "bolder","wrap": true},
    {
      "type": "FactSet",
      "facts": [
        {
          "title": "",
          "value": "@{join(json(outputs('Get_response_details')?['body/id3']), '\n')}"
        }
      ]
    }
  ]
}

验证方式 #

提交表单时选择多个操作系统选项（如Both），检查Teams中推送的自适应卡片是否正常显示所有选中项，无解析报错。

内容的提问来源于stack exchange，提问作者Chris