Umbraco 11中会员绑定班级切换的Razor视图实现问询

核心说明 #

Umbraco Forms 10+（对应Umbraco 11）已废弃UmbracoFormsStorage这类直接实例化的存储类，全部改用依赖注入的服务接口。无需手动实例化存储类，通过@inject引入官方服务即可操作表单和记录。

步骤1：注入正确的服务 #

在Razor视图顶部添加所需服务注入：

@inject Umbraco.Forms.Core.Services.IFormService FormService
@inject Umbraco.Forms.Core.Services.IRecordService RecordService
@inject Umbraco.Cms.Core.IPublishedContentQuery PublishedContentQuery

步骤2：获取当前会员的班级关联记录 #

需先找到当前会员在目标表单中提交的记录，从中提取绑定的班级ID。假设表单中用memberId字段存储会员ID（若无此字段，建议添加隐藏字段自动填充会员ID），完整修正代码如下：

完整Razor代码示例 #

@inherits UmbracoViewPage<SiteBuilderBaseViewModel>
@using USNSiteBuilder.Core.Models
@using Umbraco.Cms.Core.Security
@using Umbraco.Forms.Core.Models
@using Umbraco.Forms.Core.Services;
@using Umbraco.Cms.Core.Models.PublishedContent;

@inject IMemberManager MemberManager
@inject IFormService FormService
@inject IRecordService RecordService
@inject IPublishedContentQuery PublishedContentQuery

@{
    Layout = "USNMaster.cshtml";
    Usnstyle websiteStyle = (Usnstyle)Model.WebsiteStyle;

    var currentMember = await MemberManager.GetCurrentMemberAsync();
    List<IPublishedContent> userClasses = new List<IPublishedContent>();
    string selectedClassId = string.Empty;

    // 从Session读取当前选中的班级（切换状态存储）
    if (HttpContext.Session.TryGetValue("SelectedClassId", out byte[] classIdBytes))
    {
        selectedClassId = System.Text.Encoding.UTF8.GetString(classIdBytes);
    }

    if (currentMember != null)
    {
        // 目标表单GUID（去除前缀"umbraco_form_"）
        var formGuid = Guid.Parse("2234732813ed4ada88a0370f2630e351");
        var targetForm = FormService.GetForm(formGuid);

        if (targetForm != null)
        {
            // 查询当前会员提交的表单记录
            var memberRecords = RecordService.GetRecordsByForm(formGuid)
                .Where(r => r.RecordFields.Any(f => 
                    f.Alias == "memberId" && 
                    f.Values.FirstOrDefault()?.ToString() == currentMember.Key.ToString()))
                .ToList();

            foreach (var record in memberRecords)
            {
                // 提取绑定的班级ID列表
                if (record.RecordFields.TryGetValue("registeredClasses", out var classField))
                {
                    var classIdsStr = classField.Values.FirstOrDefault()?.ToString();
                    if (!string.IsNullOrEmpty(classIdsStr))
                    {
                        var classIds = classIdsStr.Split(',', StringSplitOptions.RemoveEmptyEntries);
                        foreach (var classId in classIds)
                        {
                            if (Guid.TryParse(classId, out Guid contentGuid))
                            {
                                var classNode = PublishedContentQuery.Content(contentGuid);
                                if (classNode != null)
                                {
                                    userClasses.Add(classNode);
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

@if (userClasses.Any())
{
    <div class="class-switcher">
        <h3>我的班级</h3>
        <!-- 班级切换按钮组 -->
        <div class="switch-buttons">
            @foreach (var classNode in userClasses)
            {
                var isSelected = classNode.Key.ToString() == selectedClassId;
                <form method="post" asp-action="SetSelectedClass" asp-controller="ClassSwitch">
                    <input type="hidden" name="classId" value="@classNode.Key" />
                    <button type="submit" class="btn @(isSelected ? "active" : "")">
                        @classNode.Value<string>("klassensNamn")
                    </button>
                </form>
            }
        </div>

        <!-- 当前选中班级详情 -->
        @if (!string.IsNullOrEmpty(selectedClassId) && Guid.TryParse(selectedClassId, out Guid selectedGuid))
        {
            var selectedClass = userClasses.FirstOrDefault(c => c.Key == selectedGuid);
            if (selectedClass != null)
            {
                <div class="class-details">
                    <h4>@selectedClass.Value<string>("klassensNamn")</h4>
                    <p>学年：@selectedClass.Value<string>("aarskull")</p>
                    <p>学校：@selectedClass.Value<string>("skolansNamn")</p>
                    <p>地址：@selectedClass.Value<string>("skolansAdress") @selectedClass.Value<string>("skolansPostnummer") @selectedClass.Value<string>("skolansPostort")</p>
                    <p>学生数：@selectedClass.Value<string>("antalElever")</p>
                    <p>教师：@selectedClass.Value<string>("pedagogensNamn")</p>
                </div>
            }
        }
    </div>
}
else
{
    <p>你还未绑定任何班级，请先完成注册。</p>
}

步骤3：添加班级切换的Surface Controller（推荐） #

为避免在Razor中写过多POST逻辑，建议创建Surface Controller处理切换提交：

using Microsoft.AspNetCore.Mvc;
using Umbraco.Cms.Core.Security;
using Umbraco.Cms.Web.Common.Controllers;

public class ClassSwitchController : SurfaceController
{
    private readonly IMemberManager _memberManager;

    public ClassSwitchController(IMemberManager memberManager)
    {
        _memberManager = memberManager;
    }

    [HttpPost]
    public IActionResult SetSelectedClass(string classId)
    {
        var currentMember = _memberManager.GetCurrentMemberAsync().Result;
        if (currentMember != null && Guid.TryParse(classId, out Guid classGuid))
        {
            // 方式1：临时存储到Session
            HttpContext.Session.SetString("SelectedClassId", classId);

            // 方式2：永久存储到会员属性（需先在会员类型中添加selectedClassId字段）
            // await _memberManager.UpdateMemberAsync(currentMember, new Dictionary<string, object>
            // {
            //     {"selectedClassId", classId}
            // });
        }

        // 重定向回原页面
        return RedirectToCurrentUmbracoPage();
    }
}

关键注意事项 #

1. 会员与表单关联：确保表单中有存储会员ID的字段（如隐藏字段，默认值设为@CurrentMember.Key），才能准确关联会员和班级记录。
2. 服务注入规则：Umbraco 11中所有Forms操作必须通过依赖注入服务，禁止直接实例化存储类。
3. 切换状态存储：可选择Session（临时状态）或会员属性（永久状态）保存选中班级，按需选择。
4. Request.Form的限制：Request.Form仅在POST请求时有效，之前尝试无效是因为页面为GET请求，无法获取表单字段值。

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