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📜  ASP.Net Razor HTML帮助器

📅  最后修改于: 2020-12-28 01:02:00             🧑  作者: Mango

ASP.NET Razor HTML帮助器

HtmlHelper是MVC 2中引入的类。它用于以编程方式创建HTML控件。它提供了内置方法来在视图页面上生成控件。在本主题中，我们列出了此类的构造函数，属性和方法。最后，我们解释了一个使用扩展方法创建表单的示例。

注意：HtmlHelper类旨在生成UI。不应在控制器或模型类中使用它。

建设者

以下是HtmlHelper类的构造函数。

Constructor Name Description
HtmlHelper(ViewContext, IViewDataContainer) It Initializes a new instance of the HtmlHelper class by using the specified view context and view data container.
HtmlHelper(ViewContext, IViewDataContainer, RouteCollection) It Initializes a new instance of the HtmlHelper class by using the specified view context, view data container, and route collection.

物产

Name Description
RouteCollection It is used to get or set the collection of routes for the application.
ViewBag It is used to get the view bag.
ViewContext It is used to get or set the context information about the view.
ViewData It is used to get the current view data dictionary.
ViewDataContainer It is used to get or set the view data container.

HtmlHelper扩展方法

Name Description Overloaded Methods
Action(String) It is used to invoke the specified child action method and returns the result as an HTML string. Action(String, Object)
Action(String, RouteValueDictionary)
Action(String, String)
Action(String, String, Object)
Action(String, String, RouteValueDictionary)
BeginForm() It is used to generate an opening
tag. The form uses the POST method.
 BeginForm(Object)
BeginForm(RouteValueDictionary)
BeginForm(String, String)
BeginForm(String, String, FormMethod)
BeginForm(String, String, FormMethod, IDictionary)
BeginForm(String, String, FormMethod, Object)
BeginForm(String, String, Object)
BeginForm(String, String, Object, FormMethod)
BeginForm(String, String, Object, FormMethod, Object)
BeginForm(String, String, RouteValueDictionary)
BeginForm(String, String, RouteValueDictionary, FormMethod)
BeginForm(String, String, RouteValueDictionary, FormMethod, IDictionary)
CheckBox(String) It is used to generate a check box input element by using the specified HTML helper and the name of the form field. CheckBox(String, Boolean)
CheckBox(String, Boolean, IDictionary)
CheckBox(String, Boolean, Object)
CheckBox(String, IDictionary)
CheckBox(String, Object)
DropDownList(String) It generates a single-selection select element using the specified HTML helper and the name of the form field. DropDownList(String, IEnumerable)
DropDownList(String, IEnumerable, IDictionary)
DropDownList(String, IEnumerable, Object)
DropDownList(String, IEnumerable, String)
DropDownList(String, IEnumerable, String, IDictionary)
DropDownList(String, IEnumerable, String, Object)
DropDownList(String, String)
Editor(String) It generates an HTML input element for each property in the object that is represented by the expression. Editor(String, Object)
Editor(String, String)
Editor(String, String, Object)
Editor(String, String, String)
Editor(String, String, String, Object)
EndForm() It renders the closing tag.
Label(String) It generates an HTML label element. Label(String, IDictionary)
Label(String, Object)
Label(String, String)
Label(String, String, IDictionary)
Label(String, String, Object)
ListBox(String) It returns a multi-select select element using the specified HTML helper. ListBox(String, IEnumerable)
ListBox(String, IEnumerable, IDictionary)
ListBox(String, IEnumerable, Object)
Password(String) It is used to generate a password input element by using the specified HTML helper. Password(String, Object)
Password(String, Object, IDictionary)
Password(String, Object, Object)
RadioButton(String, Object) It returns a radio button input element. RadioButton(String, Object, Boolean)
RadioButton(String, Object, Boolean, IDictionary)
RadioButton(String, Object, Boolean, Object)
RadioButton(String, Object, IDictionary)
RadioButton(String, Object, Object)
TextArea(String) It is used to create a text area to the web page. TextArea(String, IDictionary)
TextArea(String, Object)
TextArea(String, String)
TextArea(String, String, IDictionary)
TextArea(String, String, Int32, Int32, IDictionary)
TextArea(String, String, Int32, Int32, Object)
TextArea(String, String, Object)
TextBox(String) It is used to return a text input element by using the specified HTML helper. TextBox(String, Object)
TextBox(String, Object, IDictionary)
TextBox(String, Object, Object)
TextBox(String, Object, String)
TextBox(String, Object, String, IDictionary)
TextBox(String, Object, String, Object)

例

因为这是MVC应用程序，所以它包括Model，View和Controller。本示例包括以下文件。

视图

// HtmlHelperDemo.cshtml

@{
    ViewBag.Title = "HtmlHelperDemo";
}



User Registration Form





    @using (Html.BeginForm("UserRegistration", "Students"))
    {
        

            @Html.Label("User Name", new { @class = "control-label col-sm-2" })
            

                @Html.TextBox("username", null, new { @class = "form-control" })
            

        

        

            @Html.Label("Email ID", new { @class = "control-label col-sm-2" })
            

                @Html.TextBox("email", null, new { @class = "form-control" })
            

        

        

            @Html.Label("Gender", new { @class = "control-label col-sm-2" })
            

                

                    Male @Html.RadioButton("Gender", "male")
                    Female @Html.RadioButton("Gender", "female")
                

            

        

                

                    @Html.Label("Courses", new { @class = "control-label col-sm-2" })
                    

                        C# @Html.CheckBox("C#", new { value = "C#" })
                        ASP.NET @Html.CheckBox("ASP.NET", new { value = "ASP.NET" })
                        ADO.NET @Html.CheckBox("ADO.NET", new { value = "ADO.NET" })
                    

                

                

                    @Html.Label("Contact", new { @class = "control-label col-sm-2" })
                    

                        @Html.TextBox("contact", null, new { @class = "form-control" })
                    

                

                

                    

                    

                        
                    

                

    }

控制者

// StudentsController.cs

using System.Web.Mvc;
namespace MvcApplicationDemo.Controllers
{
    public class StudentsController : Controller
    {
        public ActionResult Index()
        {
            return View();
        }
        public ActionResult HtmlHelperDemo()
        {
            return View();
        }
[HttpPost]
        public ContentResult UserRegistration()
        {
            return Content(
                "User Name = " + Request.Form["username"] + "
" +
                "Email ID  = " + Request.Form["email"] + "
" +
                "Gender    = " + Request.Form["gender"] + "
" +
                "Courses   = " + Request.Form.GetValues("C#")[0] + " " + Request.Form.GetValues("ASP.NET")[0] + " " + Request.Form.GetValues("ADO.NET")[0] + "
" +
                "Contact   = " + Request.Form["contact"] + "
"
                );
        }
    }
}

输出：

我们正在提交此表格，其中包含以下详细信息。

提交后，我们将收到action方法中的所有值。