Html.RadioButtonListASP.NET MVC期货中有一个扩展方法。有没有人找到强类型版本的代码RadioButtonListFor<T>。在视图中看起来像这样：
<%= Html.RadioButtonListFor(model=>model.Item,Model.ItemList) %>
有没有人为ASP.NET MVC实现RadioButtonListFor <T>？
Answers:
这是aspx页面中的用法
<%= Html.RadioButtonListFor(m => m.GenderRadioButtonList)%>
这是视图模型
public class HomePageViewModel
{
public enum GenderType
{
Male,
Female
}
public RadioButtonListViewModel<GenderType> GenderRadioButtonList { get; set; }
public HomePageViewModel()
{
GenderRadioButtonList = new RadioButtonListViewModel<GenderType>
{
Id = "Gender",
SelectedValue = GenderType.Male,
ListItems = new List<RadioButtonListItem<GenderType>>
{
new RadioButtonListItem<GenderType>{Text = "Male", Value = GenderType.Male},
new RadioButtonListItem<GenderType>{Text = "Female", Value = GenderType.Female}
}
};
}
}
这是用于单选按钮列表的视图模型
public class RadioButtonListViewModel<T>
{
public string Id { get; set; }
private T selectedValue;
public T SelectedValue
{
get { return selectedValue; }
set
{
selectedValue = value;
UpdatedSelectedItems();
}
}
private void UpdatedSelectedItems()
{
if (ListItems == null)
return;
ListItems.ForEach(li => li.Selected = Equals(li.Value, SelectedValue));
}
private List<RadioButtonListItem<T>> listItems;
public List<RadioButtonListItem<T>> ListItems
{
get { return listItems; }
set
{
listItems = value;
UpdatedSelectedItems();
}
}
}
public class RadioButtonListItem<T>
{
public bool Selected { get; set; }
public string Text { get; set; }
public T Value { get; set; }
public override string ToString()
{
return Value.ToString();
}
}
这是RadioButtonListFor的扩展方法
public static class HtmlHelperExtensions
{
public static string RadioButtonListFor<TModel, TRadioButtonListValue>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, RadioButtonListViewModel<TRadioButtonListValue>>> expression) where TModel : class
{
return htmlHelper.RadioButtonListFor(expression, null);
}
public static string RadioButtonListFor<TModel, TRadioButtonListValue>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, RadioButtonListViewModel<TRadioButtonListValue>>> expression, object htmlAttributes) where TModel : class
{
return htmlHelper.RadioButtonListFor(expression, new RouteValueDictionary(htmlAttributes));
}
public static string RadioButtonListFor<TModel, TRadioButtonListValue>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, RadioButtonListViewModel<TRadioButtonListValue>>> expression, IDictionary<string, object> htmlAttributes) where TModel : class
{
var inputName = GetInputName(expression);
RadioButtonListViewModel<TRadioButtonListValue> radioButtonList = GetValue(htmlHelper, expression);
if (radioButtonList == null)
return String.Empty;
if (radioButtonList.ListItems == null)
return String.Empty;
var divTag = new TagBuilder("div");
divTag.MergeAttribute("id", inputName);
divTag.MergeAttribute("class", "radio");
foreach (var item in radioButtonList.ListItems)
{
var radioButtonTag = RadioButton(htmlHelper, inputName, new SelectListItem{Text=item.Text, Selected = item.Selected, Value = item.Value.ToString()}, htmlAttributes);
divTag.InnerHtml += radioButtonTag;
}
return divTag + htmlHelper.ValidationMessage(inputName, "*");
}
public static string GetInputName<TModel, TProperty>(Expression<Func<TModel, TProperty>> expression)
{
if (expression.Body.NodeType == ExpressionType.Call)
{
var methodCallExpression = (MethodCallExpression)expression.Body;
string name = GetInputName(methodCallExpression);
return name.Substring(expression.Parameters[0].Name.Length + 1);
}
return expression.Body.ToString().Substring(expression.Parameters[0].Name.Length + 1);
}
private static string GetInputName(MethodCallExpression expression)
{
// p => p.Foo.Bar().Baz.ToString() => p.Foo OR throw...
var methodCallExpression = expression.Object as MethodCallExpression;
if (methodCallExpression != null)
{
return GetInputName(methodCallExpression);
}
return expression.Object.ToString();
}
public static string RadioButton(this HtmlHelper htmlHelper, string name, SelectListItem listItem,
IDictionary<string, object> htmlAttributes)
{
var inputIdSb = new StringBuilder();
inputIdSb.Append(name)
.Append("_")
.Append(listItem.Value);
var sb = new StringBuilder();
var builder = new TagBuilder("input");
if (listItem.Selected) builder.MergeAttribute("checked", "checked");
builder.MergeAttribute("type", "radio");
builder.MergeAttribute("value", listItem.Value);
builder.MergeAttribute("id", inputIdSb.ToString());
builder.MergeAttribute("name", name + ".SelectedValue");
builder.MergeAttributes(htmlAttributes);
sb.Append(builder.ToString(TagRenderMode.SelfClosing));
sb.Append(RadioButtonLabel(inputIdSb.ToString(), listItem.Text, htmlAttributes));
sb.Append("<br>");
return sb.ToString();
}
public static string RadioButtonLabel(string inputId, string displayText,
IDictionary<string, object> htmlAttributes)
{
var labelBuilder = new TagBuilder("label");
labelBuilder.MergeAttribute("for", inputId);
labelBuilder.MergeAttributes(htmlAttributes);
labelBuilder.InnerHtml = displayText;
return labelBuilder.ToString(TagRenderMode.Normal);
}
public static TProperty GetValue<TModel, TProperty>(HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression) where TModel : class
{
TModel model = htmlHelper.ViewData.Model;
if (model == null)
{
return default(TProperty);
}
Func<TModel, TProperty> func = expression.Compile();
return func(model);
}
}
我认为Keltex可能是在答案中，而不是博客。我几乎从来没有去过第三方网站并下载源代码，而是喜欢在这里甚至在博客中浏览核心部分的代码示例：）
—
Jay
哦，我懂了。我开始这样做，但是代码变得越来越疯狂了，所以我认为不值得重复。我可以看到张贴代码段会很有用，但是在这种情况下张贴4-5类所需的代码可能会过大。不过，如果需要的话，我可以这样做。有什么想法吗？
—
Mac
只要描述性强，SO上的人们似乎都不会介意冗长的答案（例如，请参见stackoverflow.com/questions/1863884/which-orm-supports-this/…）。话虽这么说，我相信如果您只想做单选按钮而不是它处理的多种输入类型，那么您可以将下面的答案中的代码压缩到大约40行，并且我敢肯定您可以对您的代码做同样的事情。如果可以轻松使用我的答案中的代码，请：)
—
Jay
在MVC应用程序中使用上面的MVVM模式是否是一种一致的方法？
—
mirezus 2010年
这似乎不适用于MVC2，因为
—
德鲁·诺阿克斯
htmlHelper.ValidationMessage返回的MvcHtmlString不会实现+字符串的运算符。
MVC 3示例创建了3个带有验证的单选按钮，以确保选择了1个选项。如果表单未通过验证（例如在其他字段上），则在重新显示表单时会预先选择所选的单选选项。
视图
@Html.RadioButtonForSelectList(m => m.TestRadio, Model.TestRadioList)
@Html.ValidationMessageFor(m => m.TestRadio)
模型
public class aTest
{
public Int32 ID { get; set; }
public String Name { get; set; }
}
public class LogOnModel
{
public IEnumerable<SelectListItem> TestRadioList { get; set; }
[Required(ErrorMessage="Test Error")]
public String TestRadio { get; set; }
[Required]
[Display(Name = "User name")]
public string UserName { get; set; }
}
控制器动作
public ActionResult LogOn()
{
List<aTest> list = new List<aTest>();
list.Add(new aTest() { ID = 1, Name = "Line1" });
list.Add(new aTest() { ID = 2, Name = "Line2" });
list.Add(new aTest() { ID = 3, Name = "Line3" });
SelectList sl = new SelectList(list, "ID", "Name");
var model = new LogOnModel();
model.TestRadioList = sl;
return View(model);
}
[HttpPost]
public ActionResult LogOn(LogOnModel model, string returnUrl)
{
if (ModelState.IsValid)
{
....
}
// If we got this far, something failed, redisplay form
List<aTest> list = new List<aTest>();
list.Add(new aTest() { ID = 1, Name = "Line1" });
list.Add(new aTest() { ID = 2, Name = "Line2" });
list.Add(new aTest() { ID = 3, Name = "Line3" });
SelectList sl = new SelectList(list, "ID", "Name");
model.TestRadioList = sl;
return View(model);
}
这是扩展名：
public static class HtmlExtensions
{
public static MvcHtmlString RadioButtonForSelectList<TModel, TProperty>(
this HtmlHelper<TModel> htmlHelper,
Expression<Func<TModel, TProperty>> expression,
IEnumerable<SelectListItem> listOfValues)
{
var metaData = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
var sb = new StringBuilder();
if (listOfValues != null)
{
foreach (SelectListItem item in listOfValues)
{
var id = string.Format(
"{0}_{1}",
metaData.PropertyName,
item.Value
);
var radio = htmlHelper.RadioButtonFor(expression, item.Value, new { id = id }).ToHtmlString();
sb.AppendFormat(
"<label for=\"{0}\">{1}</label> {2}",
id,
HttpUtility.HtmlEncode(item.Text),
radio
);
}
}
return MvcHtmlString.Create(sb.ToString());
}
}
最喜欢您的解决方案的外观，非常易于集成，效果很好，谢谢！
—
Baconbeastnz
嗨，当使用克隆将表/网格（
—
变形金刚
row例如向表添加行）动态添加到客户端视图中的表时，此方法不起作用。在POST动作中，该行的单选框始终为空，但其他单元格通过！
好的，我知道这不是您问题的直接答案，但是无论如何，这可能是进行大多数输入的一种更好的方法（这样做很有趣）。我只是完成了此操作，并针对它进行了少量测试，因此我不能保证在每种情况下都能做到完美。
我从吉米·博加德（Jimmy Bogard）在这里的帖子中得到了这个主意。看一看，因为那里有很多很棒的想法。
我所做的就是创建一个“ InputFor”帮助程序，该程序将尽最大努力找出您要输入的内容并相应地输出。这将执行单选按钮，但是如果有两个以上，则默认为下拉菜单，您应该可以轻松更改此功能。
以下代码可让您拨打诸如<%= Html.InputFor(m => m.Gender) %>或的电话<%Html.InputFor(m => m.Gender, Model.GenderList)%>。最后有一点很酷，它允许您按约定进行编码，但是稍后我们将进行介绍。
public static MvcHtmlString InputFor<TModel>(this HtmlHelper<TModel> helper, Expression<Func<TModel, object>> field, Dictionary<string, string> listing) where TModel : class
{
string property_name = GetInputName(field);
PropertyDescriptor descriptor = TypeDescriptor.GetProperties(helper.ViewData.Model).Find(property_name, true);
string property_type = descriptor.PropertyType.Name;
var func = field.Compile();
var value = func(helper.ViewData.Model);
//Add hidden element if required
if (descriptor.Attributes.Contains(new HiddenInputAttribute()))
{
return helper.Hidden(property_name, value);
}
if (property_type == "DateTime" || property_type == "Date")
{
return helper.TextBox(property_name, value, new { @class = "date_picker" });
}
if (listing != null)
{
if (listing.Count <= 2)
{
//This is a good length for a radio button
string output = "";
foreach (KeyValuePair<string, string> pair in listing)
{
TagBuilder label = new TagBuilder("label");
label.MergeAttribute("for", property_name);
label.SetInnerText(pair.Value);
output += helper.RadioButton(property_name, pair.Key, (value == pair.Key)).ToHtmlString();
output += label.ToString();
}
return MvcHtmlString.Create(output);
}
else
{
//too big for a radio button, lets make a drop down
return helper.DropDownList(property_name, new SelectList(listing, "Key", "Value"), value);
}
}
else
{
if (property_type == "Boolean")
{
listing = new Dictionary<string, string>();
listing.Add("true", "Yes");
listing.Add("false", "No");
SelectList select_values = new SelectList(listing, "Key", "Value", ((bool)value ? "Yes" : "No"));
return helper.DropDownList(property_name, select_values);
}
return helper.TextBox(property_name, value);
}
}
约定编码
下面的代码允许在实现约定的基础上完成此操作。例如，如果您有一个包含要列出的属性的模型对象（性别）和一个具有相同名称但附加了“列表”的字典（GenderList），则默认情况下它将使用此列表。
例如，<%= Html.InputFor(m => m.Gender) %>可以创建一个完整的下拉列表/单选按钮组，但是可以通过进行如下调用来覆盖这些默认值：<%= Html.InputFor(m => m.Gender, alternate_list) %>
public static MvcHtmlString InputFor<TModel>(this HtmlHelper<TModel> helper, Expression<Func<TModel, object>> field) where TModel : class
{
string property_name = GetInputName(field) + "List";
PropertyDescriptor list_descriptor = TypeDescriptor.GetProperties(helper.ViewData.Model).Find(property_name, true);
Dictionary<string, string> listing = null;
if (list_descriptor != null)
{
//Found a match for PropertyNameList, try to pull it out so we can use it
PropertyInfo temp = helper.ViewData.Model.GetType().GetProperty(property_name);
listing = (Dictionary<string, string>)temp.GetValue(helper.ViewData.Model, null);
}
return InputFor(helper, field, listing);
}
现在略作免责声明：
- 这不是世界上最快的代码（由于反射和其他原因），在我的情况下，这并不是真正相关的，因为如果您打算做一些疯狂的事情，它是所有用户驱动的。
- 这段代码尚处于起步阶段，我将对其进行更彻底的测试，并在接下来的几天内对其进行添加，以听取任何改进代码的建议。
我希望这段代码对某人有用，我知道我将在接下来的几周内使用它来减少时间。减少此操作以仅执行单选按钮应该是一件微不足道的任务，祝您好运:)
周杰伦
在Jon post的基础上，做了一个小的改进，可以使用HTMLAttributtes将单选按钮列表生成为ul
public static MvcHtmlString RadioButtonListFor<TModel, TProperty>(
this HtmlHelper<TModel> htmlHelper,
Expression<Func<TModel, TProperty>> expression,
IEnumerable<SelectListItem> listOfValues,
IDictionary<string, object> radioHtmlAttributes = null,
string ulClass = null)
{
ModelMetadata metaData = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
if (radioHtmlAttributes == null)
radioHtmlAttributes = new RouteValueDictionary();
TagBuilder ulTag = new TagBuilder("ul");
if (!String.IsNullOrEmpty(ulClass))
ulTag.MergeAttribute("class", ulClass);
if (listOfValues != null)
{
// Create a radio button for each item in the list
foreach (SelectListItem item in listOfValues)
{
// Generate an id to be given to the radio button field
var id = string.Format("{0}_{1}", metaData.PropertyName, item.Value);
if (!radioHtmlAttributes.ContainsKey("id"))
radioHtmlAttributes.Add("id", id);
else
radioHtmlAttributes["id"] = id;
// Create and populate a radio button using the existing html helpers
var label = htmlHelper.Label(id, HttpUtility.HtmlEncode(item.Text));
var radio = htmlHelper.RadioButtonFor(expression, item.Value, radioHtmlAttributes).ToHtmlString();
// Create the html string that will be returned to the client
// e.g. <input data-val="true" data-val-required="You must select an option" id="TestRadio_1" name="TestRadio" type="radio" value="1" /><label for="TestRadio_1">Line1</label>
ulTag.InnerHtml += string.Format("<li>{0}{1}</li>", radio, label);
}
}
return MvcHtmlString.Create(ulTag.ToString(TagRenderMode.Normal));
}
public static MvcHtmlString RadioButtonListFor<TModel, TProperty>(
this HtmlHelper<TModel> htmlHelper,
Expression<Func<TModel, TProperty>> expression,
IEnumerable<SelectListItem> listOfValues,
object radioHtmlAttributes = null,
string ulClass = null)
{
return RadioButtonListFor<TModel, TProperty>(htmlHelper, expression, listOfValues, new RouteValueDictionary(radioHtmlAttributes), ulClass);
}
我已经在MVC 1.0中实现了类似的功能。看看这是否对您有帮助：
public static string RadioButtonList2(this HtmlHelper _helper, string _name, IEnumerable<SelectListItem> _items, string _selectedValue, string _seperator)
{
return RadioButtonList2(_helper, _name, _items, _selectedValue, _seperator, null);
}
public static string RadioButtonList2(this HtmlHelper _helper, string _name, IEnumerable<SelectListItem> _items, string _selectedValue, string _seperator, IDictionary<string, object> _htmlAttributes)
{
StringBuilder _outputScript = new StringBuilder();
foreach (var item in _items)
{
var optionField = new TagBuilder("input");
optionField.MergeAttribute("name", _name);
optionField.MergeAttribute("id", _name);
optionField.MergeAttribute("class", _name);
optionField.MergeAttribute("value", item.Value);
optionField.MergeAttribute("type", "radio");
// Check to see if it's checked
if (item.Value == _selectedValue)
optionField.MergeAttribute("checked", "checked");
if (_htmlAttributes != null)
optionField.MergeAttributes(_htmlAttributes);
_outputScript.Append(optionField.ToString(TagRenderMode.SelfClosing));
_outputScript.Append("<label style=\"display:inline;\">");
_outputScript.Append(item.Text);
_outputScript.Append("</label>" + _seperator);
}
return _outputScript.ToString();
}
在控制器中，您可以返回以下结果：
ViewData["GenderList"] = new SelectList(new[] { new { Value = "M", Text = "Male" }, new { Value = "F", Text = "Female" }, new { Value = "A", Text = "All" } }, "Value", "Text");
要么
ViewData["GenderList"] = new SelectList(_resultFromSomeLinqQuery, "GenderID", "GenderName");
并在“视图”中使用它，如下所示：
<%= Html.RadioButtonList2("Sex", ViewData["GenderList"] as SelectList, ViewData["SelectedSex"].ToString(), " ")%>
您也可以将替换为 ，<BR />以单独显示它们。
希望这可以帮助。
关于Naweed Akram naweed@xgeno.com
不幸的是，这不是我想要的模板化版本。
—
Keltex
这是一个很好的VB的“微弱”答案。对我有用，但这不是一个完整的解决方案。
<Extension()> _
Public Function RadioButtonListFor(Of TModel, TProperty)(ByVal htmlHelper As System.Web.Mvc.HtmlHelper(Of TModel), ByVal expression As System.Linq.Expressions.Expression(Of System.Func(Of TModel, TProperty)), ByVal selectList As System.Collections.Generic.IEnumerable(Of System.Web.Mvc.SelectListItem), ByVal htmlAttributes As Object) As System.Web.Mvc.MvcHtmlString
'Return htmlHelper.DropDownListFor(expression, selectList, htmlAttributes)
If selectList Is Nothing OrElse selectList.Count = 0 Then Return MvcHtmlString.Empty
Dim divTag = New TagBuilder("div")
divTag.MergeAttributes(New RouteValueDictionary(htmlAttributes))
Dim name = CType(expression.Body, System.Linq.Expressions.MemberExpression).Member.Name
Dim value = expression.Compile()(htmlHelper.ViewData.Model)
Dim sb As New StringBuilder()
For Each item In selectList
sb.AppendFormat("<input id=""{0}_{1}"" type=""radio"" name=""{0}"" value=""{1}"" {2} />", name, item.Value, If(item.Value = value.ToString, """checked""", ""))
sb.AppendFormat("<label for=""{0}_{1}"">{2}</label>", name, item.Value, item.Text)
Next
divTag.InnerHtml = sb.ToString
Return MvcHtmlString.Create(divTag.ToString)
End Function
我修改了Mac的解决方案，并用数据库表替换了Enum类型，我的表是：
在我的申请中，我要按照性别偏好租用房间。我的GenderRadios属性模型：
public partial class Room
{
public RadioButtonListViewModel GenderRadios { get; set; }
//...
}
在房间控制器中，我正在准备收音机：
private void fillRadios(Room room)
{
List<Gender> genders = fre.Genders.ToList();
room.GenderRadios= new RadioButtonListViewModel();
room.GenderRadios.ListItems = new List<RadioButtonListItem>();
foreach (Gender gender in genders)
room.GenderRadios.ListItems.Add(new RadioButtonListItem { Text = gender.Name, Value = gender.Id, Selected= (room.GenderId == gender.Id)});
}
最后，我在视图中使用它来创建空间：
<tr>
<td>Gender</td>
<%= Html.RadioButtonListFor(m => m.GenderRadios, "GenderRadiosForRoomCreate")%>
</tr>
对于编辑室：
<tr>
<td>Gender</td>
<%= Html.RadioButtonListFor(m => m.GenderRadios, "GenderRadiosForRoomEdit")%>
</tr>
创建会议室html如下所示：
<td id="GenderRadisoForRoomCreate_Container">
<input id="GenderRadisoForRoomCreate_Any" name="GenderRadisoForRoomCreate_value" value="1" type="radio"><label for="GenderRadisoForRoomCreate_Any">Any</label>
<input id="GenderRadisoForRoomCreate_Female" name="GenderRadisoForRoomCreate_value" value="2" type="radio"><label for="GenderRadisoForRoomCreate_Female">Female</label>
<input id="GenderRadisoForRoomCreate_Male" name="GenderRadisoForRoomCreate_value" value="3" type="radio"><label for="GenderRadisoForRoomCreate_Male">Male</label>
</td>
创建房间时：
[HttpPost]
public ActionResult RoomCreate(Room room, FormCollection formValues, int? GenderRadiosForRoomCreate_value, int? SmokingRadiosForRoomCreate_value)
{
room.GenderId = GenderRadiosForRoomCreate_value;
room.SmokingId = SmokingRadiosForRoomCreate_value;
//...
}
这是助手类：
public class RadioButtonListViewModel
{
public int Id { get; set; }
private int selectedValue;
public int SelectedValue
{
get { return selectedValue; }
set
{
selectedValue = value;
UpdatedSelectedItems();
}
}
private void UpdatedSelectedItems()
{
if (ListItems == null)
return;
ListItems.ForEach(li => li.Selected = Equals(li.Value, SelectedValue));
}
private List<RadioButtonListItem> listItems;
public List<RadioButtonListItem> ListItems
{
get { return listItems; }
set
{
listItems = value;
UpdatedSelectedItems();
}
}
}
public class RadioButtonListItem
{
public bool Selected { get; set; }
public string Text { get; set; }
public int Value { get; set; }
public override string ToString()
{
return Value.ToString();
}
}
public static class HtmlHelperExtensions
{
/*
tagBase: I used tagBase string for building other tag's Id or Name on this. i.e. for tagBase="GenderRadiosForRoomCreate"
<td id="GenderRadisoForRoomCreate_Container">
<input id="GenderRadisoForRoomCreate_Any" name="GenderRadisoForRoomCreate_value" value="1" type="radio"><label for="GenderRadisoForRoomCreate_Any">Any</label>
<input id="GenderRadisoForRoomCreate_Female" name="GenderRadisoForRoomCreate_value" value="2" type="radio"><label for="GenderRadisoForRoomCreate_Female">Female</label>
<input id="GenderRadisoForRoomCreate_Male" name="GenderRadisoForRoomCreate_value" value="3" type="radio"><label for="GenderRadisoForRoomCreate_Male">Male</label>
</td>
*/
public static string RadioButtonListFor<TModel>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, RadioButtonListViewModel>> expression, String tagBase) where TModel : class
{
return htmlHelper.RadioButtonListFor(expression, tagBase, null);
}
public static string RadioButtonListFor<TModel>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, RadioButtonListViewModel>> expression, String tagBase, object htmlAttributes) where TModel : class
{
return htmlHelper.RadioButtonListFor(expression, tagBase, new RouteValueDictionary(htmlAttributes));
}
public static string RadioButtonListFor<TModel>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, RadioButtonListViewModel>> expression, String tagBase, IDictionary<string, object> htmlAttributes) where TModel : class
{
var inputName = tagBase;
RadioButtonListViewModel radioButtonList = GetValue(htmlHelper, expression);
if (radioButtonList == null)
return String.Empty;
if (radioButtonList.ListItems == null)
return String.Empty;
var containerTag = new TagBuilder("td");
containerTag.MergeAttribute("id", inputName + "_Container");
foreach (var item in radioButtonList.ListItems)
{
var radioButtonTag = RadioButton(htmlHelper, inputName, new SelectListItem{Text=item.Text, Selected = item.Selected, Value = item.Value.ToString()}, htmlAttributes);
containerTag.InnerHtml += radioButtonTag;
}
return containerTag.ToString();
}
public static string RadioButton(this HtmlHelper htmlHelper, string name, SelectListItem listItem,
IDictionary<string, object> htmlAttributes)
{
var inputIdSb = new StringBuilder();
inputIdSb.Append(name);
var sb = new StringBuilder();
var builder = new TagBuilder("input");
if (listItem.Selected) builder.MergeAttribute("checked", "checked");
builder.MergeAttribute("type", "radio");
builder.MergeAttribute("value", listItem.Value);
builder.MergeAttribute("id", inputIdSb.ToString() + "_" + listItem.Text);
builder.MergeAttribute("name", name + "_value");
builder.MergeAttributes(htmlAttributes);
sb.Append(builder.ToString(TagRenderMode.SelfClosing));
sb.Append(RadioButtonLabel(inputIdSb.ToString(), listItem.Text, htmlAttributes));
return sb.ToString();
}
public static string RadioButtonLabel(string inputId, string displayText,
IDictionary<string, object> htmlAttributes)
{
var labelBuilder = new TagBuilder("label");
labelBuilder.MergeAttribute("for", inputId + "_" + displayText);
labelBuilder.MergeAttributes(htmlAttributes);
labelBuilder.InnerHtml = displayText;
return labelBuilder.ToString(TagRenderMode.Normal);
}
public static TProperty GetValue<TModel, TProperty>(HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression) where TModel : class
{
TModel model = htmlHelper.ViewData.Model;
if (model == null)
{
return default(TProperty);
}
Func<TModel, TProperty> func = expression.Compile();
return func(model);
}
}