在asp.net中，displayfor和displaynamefor的简单解释是什么? [英] What is a simple explanation for displayfor and displaynamefor in asp.net?

问题描述

我上课

public class Item
{
    public int ItemId { get; set; }

    [Required(ErrorMessage = "Category is required")]
    [Range(1, int.MaxValue, ErrorMessage = "Category is required")]
    public int CategoryId { get; set; }

    [Display(Name = "Current password")]
    [Required(ErrorMessage = "Name is required")]
    [StringLength(160)]
    public string Name { get; set; }

    [Required(ErrorMessage = "Price is required")]
    [Range(0.01, 100.00,
        ErrorMessage = "Price must be between 0.01 and 100.00")]
    public decimal Price { get; set; }

    public virtual Category Category { get; set; }
}

在我的控制器中，我将其实例传递给视图

In my controller I pass an instance of this to view

public ActionResult Index()
    {
        var model = new Item
        {
            CategoryId = 1,
            Name = "aaa",
            Price = 2
        };

        return View("Index", model);            
    }

然后在视图中我尝试使用显示名称

then in view I try to display name using

@model GenericShop.Models.Item

<p>                               
 @Html.DisplayNameFor(m => m.Name)                                       
</p>

并出现以下错误

编译器错误消息:CS1061: 'System.Web.Mvc.HtmlHelper'不包含 "DisplayNameFor"的定义，没有扩展方法 'DisplayNameFor'接受类型的第一个参数 可以找到"System.Web.Mvc.HtmlHelper" (您是否缺少using指令或程序集引用?)

Compiler Error Message: CS1061: 'System.Web.Mvc.HtmlHelper' does not contain a definition for 'DisplayNameFor' and no extension method 'DisplayNameFor' accepting a first argument of type 'System.Web.Mvc.HtmlHelper' could be found (are you missing a using directive or an assembly reference?)

@Html.DisplayFor(m => m.Name)可以正常工作，但是我看不到为什么

@Html.DisplayFor(m => m.Name) works fine, but I just cant see why

@Html.DisplayNameFor(m => m.Name)没有.

DisplayFor显示模型项的值，而DisplayNameFor仅显示属性的名称?

DisplayFor displays the value for the model item and DisplayNameFor simply displays the name of the property?

推荐答案

快到了. :)

DisplayNameFor显示属性的名称或在属性的display属性中定义的字符串.

The DisplayNameFor shows the name of the property or the string defined in the display attribute for the property.

public class Item
{
    public int ItemId { get; set; }

    [Display(Name = "Current name")]
    [Required(ErrorMessage = "Name is required")]
    [StringLength(160)]
    public string Name { get; set; }

    [Required(ErrorMessage = "Price is required")]
    [Range(0.01, 100.00,
        ErrorMessage = "Price must be between 0.01 and 100.00")]
    public decimal Price { get; set; }

}

然后@Html.DisplayNameFor(m => m.Name)将显示当前名称".

Then @Html.DisplayNameFor(m => m.Name) would show 'Current name'.

@Html.DisplayNameFor(m => m.Price)只会显示价格.

请注意，您还可以像这样本地化显示属性:

Note that you can also localize the display attribute like this:

[Display(ResourceType = typeof(MyResources), Name = "Name")]
public string Name{ get; set; }

依次将在MyResources resc文件中查找. (如果安装正确完成).

Which in turn will look in the MyResources resc file. (If setup is done correctly).

Html.DisplayFor显示字段的值.

The Html.DisplayFor shows the value of the field.

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