Asp.net mvc 基于用户角色显示MVCHtmlString

例如，我有一个搜索表单，如下面的表单，我想检查您是否有权查看输入（用户可能有权查看其中一个，而另一个可能有权查看其中3个），检查mvchtmlstring的最佳方法或扩展是什么

---

@使用（Html.BeginForm（））{
课程

@Html.ValidationSummary（true，“，new{@class=“text danger”}）
@Html.HiddenFor（model=>model.CourseID）
@LabelFor（model=>model.CourseID，新的{@class=“controllabel col-md-2”}）
@DisplayFor（model=>model.CourseID）
@LabelFor（model=>model.Title，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Title，new{htmlAttributes=new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.Title，“，new{@class=“text danger”}）
@LabelFor（model=>model.Credits，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Credits，new{htmlAttributes=new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.Credits，“，new{@class=“text danger”}）
部门
@DropDownList（“DepartmentID”，null，htmlAttributes:new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.DepartmentID，“，new{@class=“text danger”}）
}

控制器和视图模型

//namespace Testy20161006.Controllers
public class MiranViewModel
{
    public int CourseID { get; set; }
    public string Title { get; set; }
    public int Credits { get; set; }
    public int DepartmentID { get; set; }
    public List<SelectListItem> Departments { get; set; }
}

[Flags]
public enum TheSelection
{
    Begin = 0x0,
    SelectA = 0x1,
    SelectB = 0x2,
    SelectC = 0x4,
    SelectD = 0x8
}

public class HomeController : Controller
{
    public ActionResult Tut120()
    {
        List<SelectListItem> list = new List<SelectListItem>();
        SelectListItem item = new SelectListItem { Text = "DeptA", Value = "DeptA" };
        SelectListItem item2 = new SelectListItem { Text = "DeptB", Value = "DeptB" };
        MiranViewModel viewModel = new MiranViewModel { CourseID = 1, Credits = 20, DepartmentID = 1, Title = "Math 101" };
        viewModel.Departments = new List<SelectListItem>();
        viewModel.Departments.Add(item);
        viewModel.Departments.Add(item2);

        //Show section A-C but not section D
        TheSelection theSelection = TheSelection.Begin;
        theSelection |= TheSelection.SelectA;
        theSelection |= TheSelection.SelectB;
        theSelection |= TheSelection.SelectC;

        ViewBag.Selection = theSelection;

        return View(viewModel);
    }

//名称空间testy2016 1006.控制器
公共类MiranViewModel
{
public int CourseID{get；set；}
公共字符串标题{get；set；}
公共整数积分{get；set；}
public int DepartmentID{get；set；}
公共列表部门{get；set；}
}
[旗帜]
公共枚举选择
{
Begin=0x0，
选择A=0x1，
选择B=0x2，
选择C=0x4，
选择D=0x8
}
公共类HomeController:控制器
{
公共行动结果（120）
{
列表=新列表（）；
SelectListItem=new SelectListItem{Text=“DeptA”，Value=“DeptA”}；
SelectListItem2=新建SelectListItem{Text=“DeptB”，Value=“DeptB”}；
MiranViewModel viewModel=new MiranViewModel{CourseID=1，Credits=20，DepartmentID=1，Title=“Math 101”}；
viewModel.Departments=新列表（）；
viewModel.Departments.Add（项）；
viewModel.Departments.Add（第2项）；
//显示截面A-C，但不显示截面D
TheSelection TheSelection=选择开始；
theSelection |=theSelection.SelectA；
theSelection |=theSelection.SelectB；
theSelection |=theSelection.SelectC；
ViewBag.Selection=所选内容；
返回视图（viewModel）；
}

看法

@model testy2016 1006.Controllers.MiranViewModel
@使用Testy2016 1006.控制器
@{
布局=空；
}
图120
@使用（Html.BeginForm（））
{
课程

@Html.ValidationSummary（true，“，new{@class=“text danger”}）
@Html.HiddenFor（model=>model.CourseID）
@if（（ViewBag.Selection和TheSelection.SelectA）=TheSelection.SelectA）
{
@LabelFor（model=>model.CourseID，新的{@class=“controllabel col-md-2”}）
@DisplayFor（model=>model.CourseID）
}
@if（（ViewBag.Selection和TheSelection.SelectB）=TheSelection.SelectB）
{
@LabelFor（model=>model.Title，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Title，new{htmlAttributes=new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.Title，“，new{@class=“text danger”}）
}
@if（（ViewBag.Selection和TheSelection.SelectC）=TheSelection.SelectC）
{
@LabelFor（model=>model.Credits，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Credits，new{htmlAttributes=new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.Credits，“，new{@class=“text danger”}）
}
@if（（ViewBag.Selection和TheSelection.SelectD）=TheSelection.SelectD）
{
部门
@Html.DropDownListFor（m=>m.DepartmentID，
新的选择列表（Model.Departments，“Value”，“Text”），新的{htmlAttributes=new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.DepartmentID，“，new{@class=“text danger”}）
}
}

感谢您的回复，但这对我来说不是一个好的解决方案，我有一个大项目，它有很多形式，有很多用户，例如，100个用户，bas（关于用户角色部分搜索字段是否可见，我想要一个扩展来检查所有htmlinstring，不想在我的视图中使用if-else配置目前我唯一能想到的是自动生成您的视图。我会研究这个。自动生成的

//namespace Testy20161006.Controllers
public class MiranViewModel
{
    public int CourseID { get; set; }
    public string Title { get; set; }
    public int Credits { get; set; }
    public int DepartmentID { get; set; }
    public List<SelectListItem> Departments { get; set; }
}

[Flags]
public enum TheSelection
{
    Begin = 0x0,
    SelectA = 0x1,
    SelectB = 0x2,
    SelectC = 0x4,
    SelectD = 0x8
}

public class HomeController : Controller
{
    public ActionResult Tut120()
    {
        List<SelectListItem> list = new List<SelectListItem>();
        SelectListItem item = new SelectListItem { Text = "DeptA", Value = "DeptA" };
        SelectListItem item2 = new SelectListItem { Text = "DeptB", Value = "DeptB" };
        MiranViewModel viewModel = new MiranViewModel { CourseID = 1, Credits = 20, DepartmentID = 1, Title = "Math 101" };
        viewModel.Departments = new List<SelectListItem>();
        viewModel.Departments.Add(item);
        viewModel.Departments.Add(item2);

        //Show section A-C but not section D
        TheSelection theSelection = TheSelection.Begin;
        theSelection |= TheSelection.SelectA;
        theSelection |= TheSelection.SelectB;
        theSelection |= TheSelection.SelectC;

        ViewBag.Selection = theSelection;

        return View(viewModel);
    }

@model Testy20161006.Controllers.MiranViewModel
@using Testy20161006.Controllers
@{
    Layout = null;
}
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Tut120</title>
</head>
<body>
    <div>
        @using (Html.BeginForm())
        {
            <div class="form-horizontal">
                <h4>Course</h4>
                <hr />
                @Html.ValidationSummary(true, "", new { @class = "text-danger" })
                @Html.HiddenFor(model => model.CourseID)

                @if ((ViewBag.Selection & TheSelection.SelectA) == TheSelection.SelectA)
                {
                    <div class="form-group">
                        @Html.LabelFor(model => model.CourseID, new { @class = "control-label col-md-2" })
                        <div class="col-md-10">
                            @Html.DisplayFor(model => model.CourseID)
                        </div>
                    </div>
                }
                @if ((ViewBag.Selection & TheSelection.SelectB) == TheSelection.SelectB)
                {
                    <div class="form-group">
                        @Html.LabelFor(model => model.Title, htmlAttributes: new { @class = "control-label col-md-2" })
                        <div class="col-md-10">
                            @Html.EditorFor(model => model.Title, new { htmlAttributes = new { @class = "form-control" } })
                            @Html.ValidationMessageFor(model => model.Title, "", new { @class = "text-danger" })
                        </div>
                    </div>
                }
                @if ((ViewBag.Selection & TheSelection.SelectC) == TheSelection.SelectC)
                {
                    <div class="form-group">
                        @Html.LabelFor(model => model.Credits, htmlAttributes: new { @class = "control-label col-md-2" })
                        <div class="col-md-10">
                            @Html.EditorFor(model => model.Credits, new { htmlAttributes = new { @class = "form-control" } })
                            @Html.ValidationMessageFor(model => model.Credits, "", new { @class = "text-danger" })
                        </div>
                    </div>
                }
                @if ((ViewBag.Selection & TheSelection.SelectD) == TheSelection.SelectD)
                {
                    <div class="form-group">
                        <label class="control-label col-md-2" for="DepartmentID">Department</label>
                        <div class="col-md-10">
                            @Html.DropDownListFor(m => m.DepartmentID,
                        new SelectList(Model.Departments, "Value", "Text"), new { htmlAttributes = new { @class = "form-control" } })
                            @Html.ValidationMessageFor(model => model.DepartmentID, "", new { @class = "text-danger" })
                        </div>
                    </div>
                }
                <div class="form-group">
                    <div class="col-md-offset-2 col-md-10">
                        <input type="submit" value="Search" class="btn btn-default" />
                    </div>
                </div>
            </div>}
    </div>
</body>
</html>