理解ASP.NET MVC中的HTML Helpers

01 内联Html Helpers

 @helper listItems(string[] items)
 {
     <ol>
         @foreach (var item in items)
         {
             <li>@item</li>
         }
     </ol>
 }
 <h1>页面内自定义helper</h1>
 @listItems(new string[] { "项目一","项目二","项目三"})

02 内置Html Helpers

HTML Element	Standard Html Helpers Example	Strongly Typed HTML Helpers Example
TextBox	@Html.TextBox("Textbox1", "val") Output: <input id="Textbox1" name="Textbox1" type="text" value="val" />	@Html.TextBoxFor(m=>m.Name) Output: <input id="Name" name="Name" type="text" value="Name-val" />
TextArea	@Html.TextArea("Textarea1", "val", 5, 15, null) Output: <textarea cols="15" id="Textarea1" name="Textarea1" rows="5">val</textarea>	@Html.TextArea(m=>m.Address , 5, 15, new{})) Output: <textarea cols="15" id="Address" name=" Address " rows="5">Addressvalue</textarea>
Password	@Html.Password("Password1", "val") Output: <input id="Password1" name="Password1" type="password" value="val" />	@Html.PasswordFor(m=>m.Password) Output: <input id="Password" name="Password" type="password"/>
Hidden Field	@Html.Hidden("Hidden1", "val") Output: <input id="Hidden1" name="Hidden1" type="hidden" value="val" />	@Html.HiddenFor(m=>m.UserId) Output: <input id=" UserId" name=" UserId" type="hidden" value="UserId-val" />
CheckBox	@Html.CheckBox("Checkbox1", false) Output: <input id="Checkbox1" name="Checkbox1" type="checkbox" value="true" /> <input name="myCheckbox" type="hidden" value="false" />	@Html.CheckBoxFor(m=>m.IsApproved) Output: <input id="Checkbox1" name="Checkbox1" type="checkbox" value="true" /> <input name="myCheckbox" type="hidden" value="false" />
RadioButton	@Html.RadioButton("Radiobutton1", "val", true) Output: <input checked="checked" id="Radiobutton1" name="Radiobutton1" type="radio" value="val" />	@Html.RadioButtonFor(m=>m.IsApproved, "val") Output: <input checked="checked" id="Radiobutton1" name="Radiobutton1" type="radio" value="val" />
Drop-down list	@Html.DropDownList (“DropDownList1”, new SelectList(new [] {"Male", "Female"})) Output: <select id="DropDownList1" name="DropDownList1"> <option>M</option> <option>F</option> </select>	@Html.DropDownListFor(m => m.Gender, new SelectList(new [] {"Male", "Female"})) Output: <select id="Gender" name="Gender"> <option>Male</option> <option>Female</option> </select>
Multiple-select	Html.ListBox(“ListBox1”, new MultiSelectList(new [] {"Cricket", "Chess"})) Output: <select id="ListBox1" multiple="multiple" name="ListBox1"> <option>Cricket</option> <option>Chess</option> </select>	Html.ListBoxFor(m => m.Hobbies, new MultiSelectList(new [] {"Cricket", "Chess"})) Output: <select id="Hobbies" multiple="multiple" name="Hobbies"> <option>Cricket</option> <option>Chess</option> </select>