元哥的筆記

筆者已經許久沒寫MVC 5了，這一次到新單位回鍋MVC 5架構，所以趁這時候做一下表單開發的筆記

在Model建置一下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace FormControl.Models
{
    
    public class Country
    {
        public string ID { get; set; }
        public string Name { get; set; }
 
    }
   
    public class Course
    {
        public string ID { get; set; }
        public string Name { get; set; }
        public bool Checked { get; set; }
 
    }
     
    
    public class FormControlsViewModel
    {
        public string UserID { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
        public string Country { get; set; }
        public string Gender { get; set; }
        public List<Course> Courses { get; set; }
        public IEnumerable<SelectListItem> Countries { get; set; }
        public List<Country> CountryList { get; set; }
        public string Description { get; set; }
    }
}

在Controller寫一下骨架

using FormControl.Models;
using System.Collections.Generic;
using System.Web.Mvc;

namespace FormControl.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            return View();
        }

        public ActionResult About()
        {
            ViewBag.Message = "Your application description page.";

            return View();
        }

        public ActionResult Contact()
        {
            ViewBag.Message = "Your contact page.";

            return View();
        }

        public ActionResult Create()
        {
            var model = new FormControlsViewModel();
            model.Courses = CreateCourseList();
            model.Countries = CreateCountryList();
            return View(model);
        }
        [HttpPost]
        [AllowAnonymous]
        [ValidateAntiForgeryToken]
        public ActionResult Create(FormControlsViewModel model)
        {
            model.Courses = CreateCourseList();
            model.Countries = CreateCountryList();
            //var user = _fRepo.AddUser(model);
            //_fRepo.AddUserCountry(model.Country, null, user);
            //_fRepo.AddUserDescription(user.ID, model.Description);
            //_fRepo.AddUserCourses(model.Courses, user.ID);
            //_fRepo.Save();
            //return RedirectToAction("Index", "Home");
            return View(model);
        }
        public List<Course> CreateCourseList()
        {
            var courses = new List<Course>();

            courses.Add(new Course { Name = "aaaa", ID = "1" ,Checked = true});
            courses.Add(new Course { Name = "bbbb", ID = "2" });
            courses.Add(new Course { Name = "cccc", ID = "3" });

            return courses;
        }

        public IEnumerable<SelectListItem> CreateCountryList()
        {
            List<SelectListItem> countryNames = new List<SelectListItem>();

            countryNames.Add(new SelectListItem { Text = "aaa", Value = "1" });
            countryNames.Add(new SelectListItem { Text = "bbb", Value = "2" });
            countryNames.Add(new SelectListItem { Text = "ccc", Value = "3" });
            return countryNames;
        }
    }
}

 

接者在Controller中的Create 加入檢視

@model FormControls.Models.FormControlsViewModel
@{
    ViewBag.Title = "Create";
}
<h2>@ViewBag.Title</h2>
<hr />
@using (Html.BeginForm("Create", "Home", FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
{
    @Html.AntiForgeryToken()
    <div class="form-group">
        @Html.LabelFor(m => m.Name, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.TextBoxFor(m => m.Name, new { @class = "form-control" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(m => m.Email, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.TextBoxFor(m => m.Email, new { @class = "form-control" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(m => m.Gender, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.RadioButtonFor(m => m.Gender, "Male", new { @id = "male" })
            @Html.Label("male", "Male")
            @Html.RadioButtonFor(m => m.Gender, "Female", new { @id = "female" })
            @Html.Label("female", "Female")
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(m => m.Country, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.DropDownListFor(m => m.Country, (IEnumerable<SelectListItem>)Model.Countries, "Select Country", new { @class = "form-control" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(m => m.Courses, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @for (int i = 0; i < Model.Courses.Count(); i++)
            {
                @Html.CheckBoxFor(m => m.Courses[i].Checked)
                @Html.LabelFor(m => m.Courses[i].Checked, Model.Courses[i].Name)
                @Html.HiddenFor(m => m.Courses[i].ID)<br />
            }
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(m => m.Description, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.TextAreaFor(m => m.Description, new { @class = "form-control" })
        </div>
    </div>

    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" class="btn btn-default" value="Create" />
        </div>
    </div>
}

在開發系統的表單都會很常用這幾個控制項，順手作筆記一下，以便參考

若是要擴充方法追加CheckboxList和RadioButtonList在擴充方法部分加入

，這是參考mkrt的checkboxList和radiobuttonList文章直接拿來用和研究

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Mvc;
using System.Web.Routing;

namespace System.Web.Mvc.Html
{
  

    public static class CheckBoxListExtensions
    {
        #region -- CheckBoxList (Horizontal) --

        /// <summary>
        /// CheckBoxList.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">SelectListItem.</param>
        /// <returns></returns>
        public static MvcHtmlString CheckBoxList(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo)
        {
            return htmlHelper.CheckBoxList(name, listInfo, (IDictionary<string, object>)null, 0);
        }

        /// <summary>
        /// CheckBoxList.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">SelectListItem.</param>
        /// <param name="htmlAttributes">The HTML attributes.</param>
        /// <returns></returns>
        public static MvcHtmlString CheckBoxList(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo,
            object htmlAttributes)
        {
            return htmlHelper.CheckBoxList(name, listInfo, (IDictionary<string, object>)new RouteValueDictionary(htmlAttributes), 0);
        }

        /// <summary>
        /// CheckBoxList.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">The list info.</param>
        /// <param name="htmlAttributes">The HTML attributes.</param>
        /// <param name="number">每個Row的顯示個數.</param>
        /// <returns></returns>
        public static MvcHtmlString CheckBoxList(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo,
            IDictionary<string, object> htmlAttributes,
            int number)
        {
            if (String.IsNullOrEmpty(name))
            {
                throw new ArgumentException("必須給這些CheckBoxList一個Tag Name", "name");
            }
            if (listInfo == null)
            {
                throw new ArgumentNullException("listInfo", "必須要給List<SelectListItem> listInfo");
            }
            if (listInfo.Count() < 1)
            {
                throw new ArgumentException("List<SelectListItem> listInfo 至少要有一組資料", "listInfo");
            }

            StringBuilder sb = new StringBuilder();
            int lineNumber = 0;

            foreach (SelectListItem info in listInfo)
            {
                lineNumber++;

                TagBuilder builder = new TagBuilder("input");
                if (info.Selected)
                {
                    builder.MergeAttribute("checked", "checked");
                }
                builder.MergeAttributes<string, object>(htmlAttributes);
                builder.MergeAttribute("type", "checkbox");
                builder.MergeAttribute("value", info.Value);
                builder.MergeAttribute("name", name);
                sb.Append(builder.ToString(TagRenderMode.Normal));

                TagBuilder labelBuilder = new TagBuilder("label");
                labelBuilder.MergeAttribute("for", name);
                labelBuilder.InnerHtml = info.Text;
                sb.Append(labelBuilder.ToString(TagRenderMode.Normal));

                if (number == 0 || (lineNumber % number == 0))
                {
                    sb.Append("<br />");
                }
            }
            return MvcHtmlString.Create(sb.ToString());
        }

        #endregion -- CheckBoxList (Horizontal) --

        #region -- CheckBoxListVertical --

        /// <summary>
        /// Checks the box list vertical.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">The list info.</param>
        /// <param name="htmlAttributes">The HTML attributes.</param>
        /// <param name="columnNumber">The column number.</param>
        /// <returns></returns>
        public static MvcHtmlString CheckBoxListVertical(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo,
            IDictionary<string, object> htmlAttributes,
            int columnNumber = 1)
        {
            if (String.IsNullOrEmpty(name))
            {
                throw new ArgumentException("必須給這些CheckBoxList一個Tag Name", "name");
            }
            if (listInfo == null)
            {
                throw new ArgumentNullException("listInfo", "必須要給List<CheckBoxListInfo> listInfo");
            }
            if (listInfo.Count() < 1)
            {
                throw new ArgumentException("List<CheckBoxListInfo> listInfo 至少要有一組資料", "listInfo");
            }

            int dataCount = listInfo.Count();

            // calculate number of rows
            int rows = Convert.ToInt32(Math.Ceiling(Convert.ToDecimal(dataCount) / Convert.ToDecimal(columnNumber)));
            if (dataCount <= columnNumber || dataCount - columnNumber == 1)
            {
                rows = dataCount;
            }

            TagBuilder wrapBuilder = new TagBuilder("div");
            wrapBuilder.MergeAttribute("style", "float: left; light-height: 25px; padding-right: 5px;");

            string wrapStart = wrapBuilder.ToString(TagRenderMode.StartTag);
            string wrapClose = string.Concat(wrapBuilder.ToString(TagRenderMode.EndTag), " <div style=\"clear:both;\"></div>");
            string wrapBreak = string.Concat("</div>", wrapBuilder.ToString(TagRenderMode.StartTag));

            StringBuilder sb = new StringBuilder();
            sb.Append(wrapStart);

            int lineNumber = 0;

            foreach (var info in listInfo)
            {
                TagBuilder builder = new TagBuilder("input");
                if (info.Selected)
                {
                    builder.MergeAttribute("checked", "checked");
                }
                builder.MergeAttributes<string, object>(htmlAttributes);
                builder.MergeAttribute("type", "checkbox");
                builder.MergeAttribute("value", info.Value);
                builder.MergeAttribute("name", name);
                sb.Append(builder.ToString(TagRenderMode.Normal));

                TagBuilder labelBuilder = new TagBuilder("label");
                labelBuilder.MergeAttribute("for", name);
                labelBuilder.InnerHtml = info.Text;
                sb.Append(labelBuilder.ToString(TagRenderMode.Normal));

                lineNumber++;

                if (lineNumber.Equals(rows))
                {
                    sb.Append(wrapBreak);
                    lineNumber = 0;
                }
                else
                {
                    sb.Append("<br/>");
                }
            }
            sb.Append(wrapClose);
            return MvcHtmlString.Create(sb.ToString());
        }

        #endregion -- CheckBoxListVertical --

        #region -- CheckBoxList (Horizonal, Vertical) --

        /// <summary>
        /// Checks the box list.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">The list info.</param>
        /// <param name="htmlAttributes">The HTML attributes.</param>
        /// <param name="position">The position.</param>
        /// <param name="number">Position.Horizontal則表示每個Row的顯示個數, Position.Vertical則表示要顯示幾個Column</param>
        /// <returns></returns>
        public static MvcHtmlString CheckBoxList(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo,
            IDictionary<string, object> htmlAttributes,
            Position position = Position.Horizontal,
            int number = 0)
        {
            if (String.IsNullOrEmpty(name))
            {
                throw new ArgumentException("必須給這些CheckBoxList一個Tag Name", "name");
            }
            if (listInfo == null)
            {
                throw new ArgumentNullException("listInfo", "必須要給List<SelectListItem> listInfo");
            }
            if (listInfo.Count() < 1)
            {
                throw new ArgumentException("List<SelectListItem> listInfo 至少要有一組資料", "listInfo");
            }

            StringBuilder sb = new StringBuilder();
            int lineNumber = 0;

            switch (position)
            {
                case Position.Horizontal:

                    foreach (SelectListItem info in listInfo)
                    {
                        lineNumber++;
                        sb.Append(CreateCheckBoxItem(info, name, htmlAttributes));

                        if (number == 0 || (lineNumber % number == 0))
                        {
                            sb.Append("<br />");
                        }
                    }
                    break;

                case Position.Vertical:

                    int dataCount = listInfo.Count();

                    // 計算最大顯示的列數(rows)
                    int rows = Convert.ToInt32(Math.Ceiling(Convert.ToDecimal(dataCount) / Convert.ToDecimal(number)));
                    if (dataCount <= number || dataCount - number == 1)
                    {
                        rows = dataCount;
                    }

                    TagBuilder wrapBuilder = new TagBuilder("div");
                    wrapBuilder.MergeAttribute("style", "float: left; light-height: 25px; padding-right: 5px;");

                    string wrapStart = wrapBuilder.ToString(TagRenderMode.StartTag);
                    string wrapClose = string.Concat(wrapBuilder.ToString(TagRenderMode.EndTag), " <div style=\"clear:both;\"></div>");
                    string wrapBreak = string.Concat("</div>", wrapBuilder.ToString(TagRenderMode.StartTag));

                    sb.Append(wrapStart);

                    foreach (SelectListItem info in listInfo)
                    {
                        lineNumber++;
                        sb.Append(CreateCheckBoxItem(info, name, htmlAttributes));

                        if (lineNumber.Equals(rows))
                        {
                            sb.Append(wrapBreak);
                            lineNumber = 0;
                        }
                        else
                        {
                            sb.Append("<br/>");
                        }
                    }
                    sb.Append(wrapClose);
                    break;
            }

            return MvcHtmlString.Create(sb.ToString());
        }

        internal static string CreateCheckBoxItem(SelectListItem info, string name, IDictionary<string, object> htmlAttributes)
        {
            StringBuilder sb = new StringBuilder();

            TagBuilder builder = new TagBuilder("input");
            if (info.Selected)
            {
                builder.MergeAttribute("checked", "checked");
            }
            builder.MergeAttributes<string, object>(htmlAttributes);
            builder.MergeAttribute("type", "checkbox");
            builder.MergeAttribute("value", info.Value);
            builder.MergeAttribute("name", name);
            sb.Append(builder.ToString(TagRenderMode.Normal));

            TagBuilder labelBuilder = new TagBuilder("label");
            labelBuilder.MergeAttribute("for", name);
            labelBuilder.InnerHtml = info.Text;
            sb.Append(labelBuilder.ToString(TagRenderMode.Normal));

            return sb.ToString();
        }

        #endregion -- CheckBoxList (Horizonal, Vertical) --
    }
}

追加RadioButtonList

 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Mvc;
using System.Web.Routing;

namespace System.Web.Mvc.Html
{

    public static class RadioButtonListExtensions
    {
        #region -- RadioButtonList (Horizontal) --

        /// <summary>
        /// RadioButtonList.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">RadioButtonListInfo.</param>
        /// <returns></returns>
        public static MvcHtmlString RadioButtonList(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo)
        {
            return htmlHelper.RadioButtonList(name, listInfo, (IDictionary<string, object>)null, 0);
        }

        /// <summary>
        /// RadioButtonList.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">RadioButtonListInfo.</param>
        /// <param name="htmlAttributes">The HTML attributes.</param>
        /// <returns></returns>
        public static MvcHtmlString RadioButtonList(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo,
            object htmlAttributes)
        {
            return htmlHelper.RadioButtonList(
                name,
                listInfo,
                (IDictionary<string, object>)new RouteValueDictionary(htmlAttributes),
                0);
        }

        /// <summary>
        /// RadioButtonList.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">The list info.</param>
        /// <param name="htmlAttributes">The HTML attributes.</param>
        /// <param name="number">每個Row的顯示個數.</param>
        /// <returns></returns>
        public static MvcHtmlString RadioButtonList(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo,
            IDictionary<string, object> htmlAttributes,
            int number)
        {
            if (String.IsNullOrEmpty(name))
            {
                throw new ArgumentException("必須給這些RadioButtonList一個Tag Name", "name");
            }
            if (listInfo == null)
            {
                throw new ArgumentNullException("listInfo", "必須要給List<RadioButtonListInfo> listInfo");
            }
            if (listInfo.Count() < 1)
            {
                throw new ArgumentException("List<RadioButtonListInfo> listInfo 至少要有一組資料", "listInfo");
            }

            StringBuilder sb = new StringBuilder();
            int lineNumber = 0;

            foreach (SelectListItem info in listInfo)
            {
                lineNumber++;

                TagBuilder builder = new TagBuilder("input");
                if (info.Selected)
                {
                    builder.MergeAttribute("checked", "checked");
                }
                builder.MergeAttributes<string, object>(htmlAttributes);
                builder.MergeAttribute("type", "radio");
                builder.MergeAttribute("value", info.Value);
                builder.MergeAttribute("name", name);
                sb.Append(builder.ToString(TagRenderMode.Normal));

                TagBuilder labelBuilder = new TagBuilder("label");
                labelBuilder.MergeAttribute("for", name);
                labelBuilder.InnerHtml = info.Text;
                sb.Append(labelBuilder.ToString(TagRenderMode.Normal));

                if (number == 0 || (lineNumber % number == 0))
                {
                    sb.Append("<br />");
                }
            }
            return MvcHtmlString.Create(sb.ToString());
        }

        #endregion -- RadioButtonList (Horizontal) --

        #region -- RadioButtonVertical --

        /// <summary>
        /// Checks the box list vertical.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">The list info.</param>
        /// <param name="htmlAttributes">The HTML attributes.</param>
        /// <param name="columnNumber">The column number.</param>
        /// <returns></returns>
        public static MvcHtmlString RadioButtonVertical(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo,
            IDictionary<string, object> htmlAttributes,
            int columnNumber = 1)
        {
            if (String.IsNullOrEmpty(name))
            {
                throw new ArgumentException("必須給這些RadioButton一個Tag Name", "name");
            }
            if (listInfo == null)
            {
                throw new ArgumentNullException("listInfo", "必須要給List<RadioButtonInfo> listInfo");
            }
            if (listInfo.Count() < 1)
            {
                throw new ArgumentException("List<RadioButtonInfo> listInfo 至少要有一組資料", "listInfo");
            }

            int dataCount = listInfo.Count();

            // calculate number of rows
            int rows = Convert.ToInt32(Math.Ceiling(Convert.ToDecimal(dataCount) / Convert.ToDecimal(columnNumber)));
            if (dataCount <= columnNumber || dataCount - columnNumber == 1)
            {
                rows = dataCount;
            }

            TagBuilder wrapBuilder = new TagBuilder("div");
            wrapBuilder.MergeAttribute("style", "float: left; light-height: 25px; padding-right: 5px;");

            string wrapStart = wrapBuilder.ToString(TagRenderMode.StartTag);
            string wrapClose = string.Concat(wrapBuilder.ToString(TagRenderMode.EndTag), " <div style=\"clear:both;\"></div>");
            string wrapBreak = string.Concat("</div>", wrapBuilder.ToString(TagRenderMode.StartTag));

            StringBuilder sb = new StringBuilder();
            sb.Append(wrapStart);

            int lineNumber = 0;

            foreach (var info in listInfo)
            {
                TagBuilder builder = new TagBuilder("input");
                if (info.Selected)
                {
                    builder.MergeAttribute("checked", "checked");
                }
                builder.MergeAttributes<string, object>(htmlAttributes);
                builder.MergeAttribute("type", "radio");
                builder.MergeAttribute("value", info.Value);
                builder.MergeAttribute("name", name);
                sb.Append(builder.ToString(TagRenderMode.Normal));

                TagBuilder labelBuilder = new TagBuilder("label");
                labelBuilder.MergeAttribute("for", name);
                labelBuilder.InnerHtml = info.Text;
                sb.Append(labelBuilder.ToString(TagRenderMode.Normal));

                lineNumber++;

                if (lineNumber.Equals(rows))
                {
                    sb.Append(wrapBreak);
                    lineNumber = 0;
                }
                else
                {
                    sb.Append("<br/>");
                }
            }
            sb.Append(wrapClose);
            return MvcHtmlString.Create(sb.ToString());
        }

        #endregion -- RadioButtonVertical --

        #region -- RadioButtonList (Horizonal, Vertical) --

        /// <summary>
        /// Checks the box list.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <param name="name">The name.</param>
        /// <param name="listInfo">The list info.</param>
        /// <param name="htmlAttributes">The HTML attributes.</param>
        /// <param name="position">The position.</param>
        /// <param name="number">Position.Horizontal則表示每個Row的顯示個數, Position.Vertical則表示要顯示幾個Column</param>
        /// <returns></returns>
        public static MvcHtmlString RadioButtonList(this HtmlHelper htmlHelper,
            string name,
            IEnumerable<SelectListItem> listInfo,
            IDictionary<string, object> htmlAttributes,
            Position position = Position.Horizontal,
            int number = 0)
        {
            if (String.IsNullOrEmpty(name))
            {
                throw new ArgumentException("必須給這些RadioButtonList一個Tag Name", "name");
            }
            if (listInfo == null)
            {
                throw new ArgumentNullException("listInfo", "必須要給List<RadioButtonListInfo> listInfo");
            }
            if (listInfo.Count() < 1)
            {
                throw new ArgumentException("List<RadioButtonListInfo> listInfo 至少要有一組資料", "listInfo");
            }

            StringBuilder sb = new StringBuilder();
            int lineNumber = 0;

            switch (position)
            {
                case Position.Horizontal:

                    foreach (SelectListItem info in listInfo)
                    {
                        lineNumber++;
                        sb.Append(CreateRadioButtonItem(info, name, htmlAttributes));

                        if (number == 0 || (lineNumber % number == 0))
                        {
                            sb.Append("<br />");
                        }
                    }
                    break;

                case Position.Vertical:

                    int dataCount = listInfo.Count();

                    // 計算最大顯示的列數(rows)
                    int rows = Convert.ToInt32(Math.Ceiling(Convert.ToDecimal(dataCount) / Convert.ToDecimal(number)));
                    if (dataCount <= number || dataCount - number == 1)
                    {
                        rows = dataCount;
                    }

                    TagBuilder wrapBuilder = new TagBuilder("div");
                    wrapBuilder.MergeAttribute("style", "float: left; light-height: 25px; padding-right: 5px;");

                    string wrapStart = wrapBuilder.ToString(TagRenderMode.StartTag);
                    string wrapClose = string.Concat(wrapBuilder.ToString(TagRenderMode.EndTag), " <div style=\"clear:both;\"></div>");
                    string wrapBreak = string.Concat("</div>", wrapBuilder.ToString(TagRenderMode.StartTag));

                    sb.Append(wrapStart);

                    foreach (SelectListItem info in listInfo)
                    {
                        lineNumber++;
                        sb.Append(CreateRadioButtonItem(info, name, htmlAttributes));

                        if (lineNumber.Equals(rows))
                        {
                            sb.Append(wrapBreak);
                            lineNumber = 0;
                        }
                        else
                        {
                            sb.Append("<br/>");
                        }
                    }
                    sb.Append(wrapClose);
                    break;
            }

            return MvcHtmlString.Create(sb.ToString());
        }

        /// <summary>
        /// CreateRadioButtonItem
        /// </summary>
        /// <param name="info"></param>
        /// <param name="name"></param>
        /// <param name="htmlAttributes"></param>
        /// <returns></returns>
        internal static string CreateRadioButtonItem(
            SelectListItem info,
            string name,
            IDictionary<string, object> htmlAttributes)
        {
            StringBuilder sb = new StringBuilder();

            TagBuilder builder = new TagBuilder("input");
            if (info.Selected)
            {
                builder.MergeAttribute("checked", "checked");
            }
            builder.MergeAttributes<string, object>(htmlAttributes);
            builder.MergeAttribute("type", "radio");
            builder.MergeAttribute("value", info.Value);
            builder.MergeAttribute("name", name);
            sb.Append(builder.ToString(TagRenderMode.Normal));

            TagBuilder labelBuilder = new TagBuilder("label");
            labelBuilder.MergeAttribute("for", name);
            labelBuilder.InnerHtml = info.Text;
            sb.Append(labelBuilder.ToString(TagRenderMode.Normal));

            return sb.ToString();
        }

        #endregion -- RadioButtonList (Horizonal, Vertical) --

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace System.Web.Mvc.Html
{
    public enum Position
    {
        Horizontal,
        Vertical
    }
}

最後筆者會依據篩選的部分開始進行

集合.ForEach(x => x.Selected = (x.Value == 所選的值) ? true : false); //進行勾選動作

參考：https://kevintsengtw.blogspot.com/2012/09/aspnet-mvc-checkboxlist-radiobuttonlist.html

元哥的筆記