这是视图//
Views/Team/Delete.
cshtml - 删除确认页面
@model UserManagementSystem.Web.Models.
ViewModels.TeamDelete
ViewModel
@{
ViewData["Title"] = $"删除队别 - {Model.Name}";
}
<div class="container-fluid">
<div class="d-flex justify-content-between align-items-center mb-4">
<h2>@
ViewData["Title"]</h2>
<a asp-action="Index" class="btn btn-secondary">
<i class="bi bi-arrow-left"></i> 返回列表
</a>
</div>
@if (TempData["ErrorMessage"] != null)
{
<div class="alert alert-danger alert-dismissible fade show" role="alert">
@TempData["ErrorMessage"]
<button type="button" class="btn-close" data-bs-dismiss="alert"></button>
</div>
}
<div class="row">
<div class="col-md-8">
<div class="card border-danger">
<div class="card-header bg-danger text-white">
<h5 class="mb-0">删除确认</h5>
</div>
<div class="card-body">
<div class="alert alert-warning">
<h5><i class="bi bi-exclamation-triangle"></i> 警告：此操作不可撤销！</h5>
<p>您即将永久删除以下队别信息，删除后将无法恢复。</p>
</div>
<h6>要删除的队别信息：</h6>
<dl class="row">
<dt class="col-sm-3">@Html.DisplayNameFor(model => model.Name)</dt>
<dd class="col-sm-9">@Html.DisplayFor(model => model.Name)</dd>
<dt class="col-sm-3">@Html.DisplayNameFor(model => model.GroupName)</dt>
<dd class="col-sm-9">@Html.DisplayFor(model => model.GroupName)</dd>
<dt class="col-sm-3">@Html.DisplayNameFor(model => model.CmbName)</dt>
<dd class="col-sm-9">@Html.DisplayFor(model => model.CmbName)</dd>
<dt class="col-sm-3">@Html.DisplayNameFor(model => model.SortOrder)</dt>
<dd class="col-sm-9">@Html.DisplayFor(model => model.SortOrder)</dd>
</dl>
<p class="text-danger">
<strong>重要提示：</strong> 删除此队别不会影响用户数据，因为队别目前不直接关联用户。
</p>
</div>
</div>
</div>
<div class="col-md-4">
<div class="card mb-4">
<div class="card-header bg-danger text-white">
<h5 class="mb-0">确认删除</h5>
</div>
<div class="card-body">
<p>请确认您要删除这个队别吗？</p>
<form asp-action="Delete" method="post">
@Html.AntiForgeryToken()
<input type="hidden" name="id" value="@Model.Id" />
<div class="d-grid gap-2">
<button type="submit" class="btn btn-lg btn-danger">
<i class="bi bi-trash-fill"></i> 确认删除
</button>
<a asp-action="Details" asp-route-id="@Model.Id" class="btn btn-lg btn-secondary">
<i class="bi bi-x-circle"></i> 取消删除
</a>
</div>
</form>
</div>
</div>
<div class="card">
<div class="card-header bg-secondary text-white">
<h5 class="mb-0">安全提示</h5>
</div>
<div class="card-body">
<ul class="list-unstyled">
<li class="mb-2"><i class="bi bi-shield-lock-fill text-success"></i> 删除操作需要二次确认</li>
<li class="mb-2"><i class="bi bi-shield-lock-fill text-success"></i> 系统会记录操作日志</li>
<li class="mb-2"><i class="bi bi-shield-lock-fill text-success"></i> 建议先备份重要数据</li>
<li class="mb-2"><i class="bi bi-shield-lock-fill text-success"></i> 删除后可通过重新创建恢复</li>
</ul>
</div>
</div>
</div>
</div>
</div>
这是控制器// Controllers/TeamController.cs
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using System.Threading.Tasks;
using UserManagementSystem.Web.Data;
using UserManagementSystem.Web.Models;
using UserManagementSystem.Web.Models.
ViewModels;
namespace UserManagementSystem.Web.Controllers
{
public class TeamController : Controller
{
private readonly ApplicationDbContext _context;
public TeamController(ApplicationDbContext context)
{
_context = context;
}
[HttpGet]
public async Task<IActionResult> Index(TeamListRequestModel request)
{
// 确保页码至少为1
request.PageNumber = Math.Max(1, request.PageNumber);
var query = _context.Teams
.Include(t => t.Group).ThenInclude(g => g.Cmb)
.AsQueryable();
// 应用过滤条件
if (!string.IsNullOrEmpty(request.SearchTerm))
{
query = query.Where(t => t.Name.Contains(request.SearchTerm));
}
if (request.SelectedGroupId.HasValue)
{
query = query.Where(t => t.GroupId == request.SelectedGroupId.Value);
}
if (request.SelectedCmbId.HasValue)
{
query = query.Where(t => t.Group != null && t.Group.CmbId == request.SelectedCmbId.Value);
}
const int pageSize = 10;
var totalItems = await query.CountAsync();
var totalPages = (int)Math.Ceiling(totalItems / (double)pageSize);
var teams = await query
.OrderBy(t => t.SortOrder)
.ThenBy(t => t.Id)
.Skip((request.PageNumber - 1) * pageSize)
.Take(pageSize)
.Select(t => new TeamListItem
ViewModel
{
Id = t.Id,
Name = t.Name,
GroupName = t.Group != null ? t.Group.Name : "未分配",
CmbName = t.Group != null && t.Group.Cmb != null ? t.Group.Cmb.Name : "未知",
SortOrder = t.SortOrder,
GroupId = t.GroupId??0
})
.ToListAsync();
// ✅ 新增：传递所有组别（包含所属行政村名称）到视图
ViewBag.AllGroups = await _context.Groups
.Include(g => g.Cmb)
.Select(g => new GroupSelect
ViewModel
{
Id = g.Id,
Name = g.Name,
CmbName = g.Cmb != null ? g.Cmb.Name : "未知" // 或使用 ?. ?? 更简洁
})
.ToListAsync();
// ✅ 新增：传递所有行政村到视图
ViewBag.AllCmbs = await _context.Cmbs
.Select(c => new { c.Id, c.Name })
.ToListAsync();
var
viewModel = new TeamList
ViewModel
{
Teams = teams,
PageNumber = request.PageNumber,
TotalPages = totalPages,
TotalItems = totalItems,
SearchTerm = request.SearchTerm,
SelectedGroupId = request.SelectedGroupId,
SelectedCmbId = request.SelectedCmbId
};
return View(
viewModel);
}
[HttpGet("Details/{id}")]
public async Task<IActionResult> Details(int id)
{
var team = await _context.Teams
.Include(t => t.Group)
.ThenInclude(g => g.Cmb)
.FirstOrDefaultAsync(t => t.Id == id);
if (team == null)
{
return NotFound();
}
var
viewModel = new TeamDetail
ViewModel
{
Id = team.Id,
Name = team.Name,
GroupName = team.Group?.Name ?? string.Empty,
CmbName = team.Group?.Cmb?.Name ?? string.Empty,
SortOrder = team.SortOrder
};
return View(
viewModel);
}
[HttpGet("Create")]
public async Task<IActionResult> Create()
{
// ✅ 创建时也需要下拉框数据
ViewBag.AllGroups = await _context.Groups
.Include(g => g.Cmb)
.Select(g => new GroupSelect
ViewModel
{
Id = g.Id,
Name = g.Name,
CmbName = g.Cmb.Name
})
.ToListAsync();
return View(new TeamEdit
ViewModel());
}
[HttpPost("Create")]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create(TeamEdit
ViewModel model)
{
if (ModelState.IsValid)
{
var team = new Team
{
Name = model.Name,
GroupId = model.GroupId,
SortOrder = model.SortOrder
};
_context.Teams.Add(team);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
// 如果验证失败，重新加载下拉框数据
ViewBag.AllGroups = await _context.Groups
.Include(g => g.Cmb)
.Select(g => new GroupSelect
ViewModel
{
Id = g.Id,
Name = g.Name,
CmbName = g.Cmb.Name
})
.ToListAsync();
return View(model);
}
[HttpGet("Edit/{id}")]
public async Task<IActionResult> Edit(int id)
{
var team = await _context.Teams.FindAsync(id);
if (team == null)
{
return NotFound();
}
var model = new TeamEdit
ViewModel
{
Id = team.Id,
Name = team.Name,
GroupId = team.GroupId ?? 0,
SortOrder = team.SortOrder
};
// ✅ 编辑时也需要下拉框数据
ViewBag.AllGroups = await _context.Groups
.Include(g => g.Cmb)
.Select(g => new GroupSelect
ViewModel
{
Id = g.Id,
Name = g.Name,
CmbName = g.Cmb.Name
})
.ToListAsync();
return View(model);
}
[HttpPost("Edit/{id}")]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Edit(int id, TeamEdit
ViewModel model)
{
if (id != model.Id)
{
return NotFound();
}
if (ModelState.IsValid)
{
var team = await _context.Teams.FindAsync(id);
if (team == null)
{
return NotFound();
}
team.Name = model.Name;
team.GroupId = model.GroupId;
team.SortOrder = model.SortOrder;
try
{
_context.Update(team);
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!TeamExists(team.Id))
{
return NotFound();
}
else
{
throw;
}
}
return RedirectToAction(nameof(Index));
}
// 验证失败时重新加载下拉框
ViewBag.AllGroups = await _context.Groups
.Include(g => g.Cmb)
.Select(g => new GroupSelect
ViewModel
{
Id = g.Id,
Name = g.Name,
CmbName = g.Cmb.Name
})
.ToListAsync();
return View(model);
}
[HttpGet("Delete/{id}")]
public async Task<IActionResult> Delete(int id)
{
var team = await _context.Teams
.Include(t => t.Group)
.ThenInclude(g => g.Cmb)
.FirstOrDefaultAsync(t => t.Id == id);
if (team == null)
{
return NotFound();
}
var model = new TeamDelete
ViewModel
{
Id = team.Id,
Name = team.Name,
GroupName = team.Group?.Name ?? string.Empty,
CmbName = team.Group?.Cmb?.Name ?? string.Empty,
SortOrder = team.SortOrder
};
return View(model);
}
// POST: Team/Delete/5
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Delete(int id)
{
var team = await _context.Teams.FindAsync(id);
if (team == null)
{
TempData["ErrorMessage"] = "团队不存在或已被删除。";
return RedirectToAction(nameof(Index));
}
_context.Teams.Remove(team);
await _context.SaveChangesAsync();
TempData["SuccessMessage"] = $"团队 '{team.Name}' 已成功删除。";
return RedirectToAction(nameof(Index));
}
private bool TeamExists(int id)
{
return _context.Teams.Any(e => e.Id == id);
}
}
}
博客主要介绍了Redirect、RedirectToAction和Return View的区别。Redirect让浏览器重定向，与服务器两次交互，新请求取不到第一次的ViewBag信息；Return View由服务器渲染cshtml内容，一次交互，可获取ViewBag信息。RedirectToAction是客户端重定向，无法读取ViewBag内容。还说明了各自适用场景。
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