Identity角色管理三（编辑角色）

using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace Shop.ViewModel
{
    public class CreateEditRoleViewModel
    {
        [Required(ErrorMessage = "角色名不能为空")]
        [DisplayName("角色名")]
        public string Name { get; set; }
    }
}

// GET: RoleController/Edit/5
public ActionResult Edit(int id)
{
    return View();
}

// POST: RoleController/Edit/5
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Edit(string id, CreateEditRoleViewModel input)
{
    var role = await _roleManager.FindByIdAsync(id);
    if (role != null)
    {
        role.Name = input.Name;
        var result = await _roleManager.UpdateAsync(role);
        if (result.Succeeded)
        {
            return RedirectToAction("Index");
        }

        foreach (var error in result.Errors)
        {
            ModelState.AddModelError("", error.Description);
        }
    }

    return View(input);
}

@model Shop.ViewModel.CreateEditRoleViewModel
@*因只需要一个角色名，故直接使用了创建视图模型*@

@{
    ViewData["Title"] = "Edit";
}

<h1>Edit</h1>

<h4>编辑角色</h4>
<hr />
<div class="row">
    <div class="col-md-4">
        <form asp-action="Edit">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="Name" class="control-label"></label>
                <input asp-for="Name" class="form-control" />
                <span asp-validation-for="Name" class="text-danger"></span>
            </div>
            <div class="form-group">
                <input type="submit" value="Save" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

@section Scripts {
    @{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}