C# MVC3型号绑定器无法绑定字典<；字符串，bool>；这是我的ViewModel的一部分

我搞不清楚我搞砸了什么。

FormCollection

似乎表明一切都是正确的<代码>角色名也很好地恢复了。那么为什么

RoleMembership

返回

null

型号：

public class EditRoleMembershipViewModel
{
    public string RoleName { get; set; }
    public Dictionary<string, bool> RoleMembership { get; set; }
}

[HttpGet]
public ActionResult EditRoleMembership(string roleName)
{
    var viewModel = new EditRoleMembershipViewModel {RoleName = roleName};

    var allUsers = _userServices.GetAllUsers();
    getRolesForUsers(allUsers);
    var role = _roleServices.GetRole(roleName);

    viewModel.RoleMembership = new Dictionary<string, bool>();
    foreach (var user in allUsers)
    {
        var isMember = user.Roles != null && user.Roles.Contains(role);
        viewModel.RoleMembership.Add(user.UserName, isMember);
    }

    return View(viewModel);
}

@model CI.Portal.Mvc.ViewModels.EditRoleMembershipViewModel
@{
    ViewBag.Title = "Edit Role";
}
<h2>@ViewBag.Title: @Model.RoleName</h2>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)
    <table>
        <thead>
            <tr>
                <th>
                </th>
                <th>
                    In Role
                </th>
            </tr>
        </thead>
        <tbody>
            @{
                int index = 0;
                foreach (var item in Model.RoleMembership)
                {
                    <tr>
                        <td>
                            @item.Key
                            @Html.Hidden(string.Format("model.RoleMembership[{0}].Key", index), item.Key)
                        </td>
                        <td>@Html.CheckBox(string.Format("model.RoleMembership[{0}].Value", index), item.Value)</td>
                    </tr>
                    index++;
                }
            }
        </tbody>
    </table>

    <p>
        <input type="submit" value="Save" />
    </p>
}
<div>
    @Html.ActionLink("Back to Details", "RoleDetails", new { Model.RoleName })
</div>

公共类EditRoleMembershipViewModel
{
公共字符串RoleName{get；set；}
公共字典角色记忆{get；set；}
}

控制器动作：

public class EditRoleMembershipViewModel
{
    public string RoleName { get; set; }
    public Dictionary<string, bool> RoleMembership { get; set; }
}

[HttpGet]
public ActionResult EditRoleMembership(string roleName)
{
    var viewModel = new EditRoleMembershipViewModel {RoleName = roleName};

    var allUsers = _userServices.GetAllUsers();
    getRolesForUsers(allUsers);
    var role = _roleServices.GetRole(roleName);

    viewModel.RoleMembership = new Dictionary<string, bool>();
    foreach (var user in allUsers)
    {
        var isMember = user.Roles != null && user.Roles.Contains(role);
        viewModel.RoleMembership.Add(user.UserName, isMember);
    }

    return View(viewModel);
}

@model CI.Portal.Mvc.ViewModels.EditRoleMembershipViewModel
@{
    ViewBag.Title = "Edit Role";
}
<h2>@ViewBag.Title: @Model.RoleName</h2>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)
    <table>
        <thead>
            <tr>
                <th>
                </th>
                <th>
                    In Role
                </th>
            </tr>
        </thead>
        <tbody>
            @{
                int index = 0;
                foreach (var item in Model.RoleMembership)
                {
                    <tr>
                        <td>
                            @item.Key
                            @Html.Hidden(string.Format("model.RoleMembership[{0}].Key", index), item.Key)
                        </td>
                        <td>@Html.CheckBox(string.Format("model.RoleMembership[{0}].Value", index), item.Value)</td>
                    </tr>
                    index++;
                }
            }
        </tbody>
    </table>

    <p>
        <input type="submit" value="Save" />
    </p>
}
<div>
    @Html.ActionLink("Back to Details", "RoleDetails", new { Model.RoleName })
</div>

[HttpGet]
公共操作结果EditRoleMembership（字符串roleName）
{
var viewModel=neweditrolemembershipviewmodel{RoleName=RoleName}；
var allUsers=_userServices.GetAllUsers（）；
getRolesForUsers（allUsers）；
var role=_roleServices.GetRole（roleName）；
viewModel.RoleMembership=新字典（）；
foreach（allUsers中的var用户）
{
var isMember=user.Roles！=null&&user.Roles.Contains（role）；
viewModel.RoleMembership.Add（user.UserName，isMember）；
}
返回视图（viewModel）；
}

查看：

public class EditRoleMembershipViewModel
{
    public string RoleName { get; set; }
    public Dictionary<string, bool> RoleMembership { get; set; }
}

[HttpGet]
public ActionResult EditRoleMembership(string roleName)
{
    var viewModel = new EditRoleMembershipViewModel {RoleName = roleName};

    var allUsers = _userServices.GetAllUsers();
    getRolesForUsers(allUsers);
    var role = _roleServices.GetRole(roleName);

    viewModel.RoleMembership = new Dictionary<string, bool>();
    foreach (var user in allUsers)
    {
        var isMember = user.Roles != null && user.Roles.Contains(role);
        viewModel.RoleMembership.Add(user.UserName, isMember);
    }

    return View(viewModel);
}

@model CI.Portal.Mvc.ViewModels.EditRoleMembershipViewModel
@{
    ViewBag.Title = "Edit Role";
}
<h2>@ViewBag.Title: @Model.RoleName</h2>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)
    <table>
        <thead>
            <tr>
                <th>
                </th>
                <th>
                    In Role
                </th>
            </tr>
        </thead>
        <tbody>
            @{
                int index = 0;
                foreach (var item in Model.RoleMembership)
                {
                    <tr>
                        <td>
                            @item.Key
                            @Html.Hidden(string.Format("model.RoleMembership[{0}].Key", index), item.Key)
                        </td>
                        <td>@Html.CheckBox(string.Format("model.RoleMembership[{0}].Value", index), item.Value)</td>
                    </tr>
                    index++;
                }
            }
        </tbody>
    </table>

    <p>
        <input type="submit" value="Save" />
    </p>
}
<div>
    @Html.ActionLink("Back to Details", "RoleDetails", new { Model.RoleName })
</div>

@model CI.Portal.Mvc.ViewModels.EditRoleMembershipViewModel
@{
ViewBag.Title=“编辑角色”；
}
@ViewBag.Title:@Model.RoleName
@使用（Html.BeginForm（））
{
@Html.AntiForgeryToken（）
@Html.ValidationSummary（true）
扮演
@{
int指数=0；
foreach（Model.RoleMembership中的var项）
{
@项目.关键
@Html.Hidden（string.Format（“model.RoleMembership[{0}].Key”，index），item.Key）
@CheckBox（string.Format（“model.RoleMembership[{0}].Value”，索引），item.Value）
索引++；
}
}


}
@ActionLink（“回到细节”，“RoleDetails”，新的{Model.RoleName}）

能否尝试从复选框助手声明中删除“model.”前缀

而不是

<td>
    @item.Key
    @Html.Hidden(string.Format("model.RoleMembership[{0}].Key", index), item.Key)
</td>
<td>
    @Html.CheckBox(string.Format("model.RoleMembership[{0}].Value", index), item.Value)
</td>

@项目.关键
@Html.Hidden（string.Format（“model.RoleMembership[{0}].Key”，index），item.Key）
@CheckBox（string.Format（“model.RoleMembership[{0}].Value”，索引），item.Value）

这样做：

<td>
    @item.Key
    @Html.Hidden(string.Format("RoleMembership[{0}].Key", index), item.Key)
</td>
<td>
    @Html.CheckBox(string.Format("RoleMembership[{0}].Value", index), item.Value)
</td>

@项目.关键
@隐藏（string.Format（“RoleMembership[{0}].Key”，索引），item.Key）
@CheckBox（string.Format（“RoleMembership[{0}].Value”，索引），item.Value）

我认为默认的model binder无法做到这一点。我很确定这就是序列化词典的问题，如果不做一些额外的工作，.Net是无法做到的。难以置信，这是多么简单。在这方面，按惯例编码真的会让你后悔莫及。如果我知道怎么做，如果你能给我一个关于模型绑定器的约定的资源，我很乐意给你一个奖励