asp.net-mvc-3 – 如何将复选框绑定到mvc3中的viewmodel

发布时间：2020-12-15 20:25:37 所属栏目：asp.Net 来源：网络整理

导读：我真的很努力地围绕着这个：我有一个UserModel和一个UserRoleModel： public class UserModel{ [Required] [Display(Name = "User name")] public string UserName { get; set; } [Required] [DataType(DataType.EmailAddress)] [Display(Name = "Email add

我真的很努力地围绕着这个：

我有一个UserModel和一个UserRoleModel：

public class UserModel
{
    [Required]
    [Display(Name = "User name")]
    public string UserName { get; set; }

    [Required]
    [DataType(DataType.EmailAddress)]
    [Display(Name = "Email address")]
    public string Email { get; set; }

    [Required]
    [StringLength(100,ErrorMessage = "The {0} must be at least {2} characters long.",MinimumLength = 6)]
    [DataType(DataType.Password)]
    [Display(Name = "Password")]
    public string Password { get; set; }

    [DataType(DataType.Password)]
    [Display(Name = "Confirm password")]
    [Compare("Password",ErrorMessage = "The password and confirmation password do not match.")]
    public string ConfirmPassword { get; set; }

    public IEnumerable<string> UserRoles { get; set; }
}
public class UserRoleModel
{
    public IEnumerable<string> AllRoles { get; set; }
    public UserModel user { get; set; }

    public UserRoleModel()
    {
        this.AllRoles = Roles.GetAllRoles();
        this.user = new UserModel();
    }
}

在控制器中：

public ActionResult Create()
    {
        return View(new UserRoleModel());
    }

    [HttpPost]
    public ActionResult Create(UserRoleModel model)
    {
        if (ModelState.IsValid)
        {
            MembershipCreateStatus createStatus;
            Membership.CreateUser(model.user.UserName,model.user.Password,model.user.Email,null,true,out createStatus);

            if (createStatus == MembershipCreateStatus.Success)
            {
                foreach (var r in model.AllRoles)
                {
                    Roles.AddUserToRole(model.user.UserName,r);
                }

                return RedirectToAction("Index","Home");
            }
            else
            {
                ModelState.AddModelError("",ErrorCodeToString(createStatus));
            }
        }

        return View(model);
    }

和视图：

@model BBmvc.Areas.Tools.Models.UserRoleModel

和：

@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
    <legend>UserModel</legend>

    <div class="editor-label">
        @Html.LabelFor(model => model.user.UserName)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.user.UserName)
        @Html.ValidationMessageFor(model => model.user.UserName)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.user.Email)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.user.Email)
        @Html.ValidationMessageFor(model => model.user.Email)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.user.Password)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.user.Password)
        @Html.ValidationMessageFor(model => model.user.Password)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.user.ConfirmPassword)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.user.ConfirmPassword)
        @Html.ValidationMessageFor(model => model.user.ConfirmPassword)
    </div>
    <div class="editor-field">
        @foreach (var r in @Model.AllRoles)
        {
            @Html.CheckBox(r,false)
            @Html.Label(r)
            <br />
        }
    </div>

    <p>
        <input type="submit" value="Create" />
    </p>
</fieldset>

}

首先,我无法从我的viewModel中找出如何使用CheckBoxFor.但它显示复选框选项,所以我可以与它一起生活.但是,我无法确定如何确定哪个复选框在表单发布时被检查.我也似乎破坏了客户端验证,我假设因为我使用viewModel.

解决方法

CheckBoxFor助手以布尔属性运行.所以你可以定义一个视图模型：

public class RoleViewModel
{
    public string Name { get; set; }
    public bool Selected { get; set; }
}

然后在视图模型上修改AllRoles属性：

public class UserRoleModel
{
    public IEnumerable<RoleViewModel> AllRoles { get; set; }
    public UserModel user { get; set; }

    public UserRoleModel()
    {
        this.AllRoles = Roles.GetAllRoles().Select(r => new RoleViewModel 
        {
            Name = r
        });
        this.user = new UserModel();
    }
}

而在视图中而不是编写foreach循环使用编辑器模板：

<div class="editor-field">
    @Html.EditorFor(x => x.AllRoles)
</div>

最后定义一个RoleViewModel类型的编辑器模板,它将自动为AllRoles集合的每个元素呈现(?/ Views / Shared / EditorTemplates / RoleViewModel.cshtml)

@model RoleViewModel
@Html.CheckBoxFor(x => x.Selected)
@Html.LabelFor(x => x.Selected,Model.Name)
@Html.HiddenFor(x => x.Name)
<br />

就这样.在Post操作中,您将获得使用值填充的AllRoles属性.

（编辑：李大同）

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