C# 如何将数据属性添加到 ASP.NET MVC 中的 html 元素？
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How to add data attributes to html element in ASP.NET MVC?
提问by Hemant
I learned few minutes agothat adding data attributes is a nice way to add custom information to html elements. So I tried to do like this:
几分钟前我了解到添加数据属性是一种将自定义信息添加到 html 元素的好方法。所以我试着这样做：
<%= Html.TextBox ("textBox", "Value", new { data-myid = m.ID })%>
But it ends up as a syntax error. How can I define custom data attributes?
但它以语法错误告终。如何定义自定义数据属性？
EDIT:
编辑：
I see that I can achieve this effect using:
我看到我可以使用以下方法实现这种效果：
<%= Html.TextBox ("textBox", "Value", new Dictionary<string, object> {{ "data-myid", m.ID }})%>
But that doesn't look...umm...clean! Is there any better way to do this?
但这看起来并不......嗯......干净！有没有更好的方法来做到这一点？
采纳答案by Lee Gunn
Use an underscoreinstead of a dash.
使用下划线而不是破折号。
new { data_myid = m.ID }
new { data_myid = m.ID }
This definitely works in MVC3(haven't checked other versions). The underscore will be converted to a dash when the HTML is rendered.
这绝对适用于 MVC3（尚未检查其他版本）。呈现 HTML 时，下划线将转换为破折号。
EDIT
编辑
This works in the latest versions of MVC too.
这也适用于最新版本的 MVC。
回答by redsquare
I think you will have to create your own helper to do this for you. I cannot find a way to do this directly in the view.
我认为您必须创建自己的助手来为您执行此操作。我找不到直接在视图中执行此操作的方法。
回答by stevemegson
I can't see any way to get an anonymous type declaration to accept data-myid, since that's not a valid property name in C#. One option would be to create a new overload that takes an extra dataAttributesparameter, and prepends data-to the names for you...
我看不到任何方法可以让匿名类型声明接受data-myid，因为这在 C# 中不是有效的属性名称。一种选择是创建一个新的重载，它带有一个额外的dataAttributes参数，并data-为您添加名称...
using System.ComponentModel;
using System.Web.Mvc;
using System.Web.Mvc.Html;
using System.Web.Routing;
static class TextBoxExtensions
{
public static string TextBox(this HtmlHelper htmlHelper, string name, object value, object htmlAttributes, object dataAttributes)
{
RouteValueDictionary attributes = new RouteValueDictionary(htmlAttributes);
attributes.AddDataAttributes(dataAttributes);
return htmlHelper.TextBox(
name,
value,
((IDictionary<string, object>)attributes);
}
private static void AddDataAttributes(this RouteValueDictionary dictionary, object values)
{
if (values != null)
{
foreach (PropertyDescriptor descriptor in TypeDescriptor.GetProperties(values))
{
object obj2 = descriptor.GetValue(values);
dictionary.Add("data-" + descriptor.Name, obj2);
}
}
}
}
Then you can add a data-myidattribute with
然后你可以添加一个data-myid属性
<%= Html.TextBox ("textBox", "Value",
new { title = "Some ordinary attribute" },
new { myid = m.ID }) %>
However, that leaves you to create that overload on any other methods that you want to accept data attributes, which is a pain. You could get around that by moving the logic to a
但是，这会让您在要接受数据属性的任何其他方法上创建重载，这很痛苦。您可以通过将逻辑移至
public static IDictionary<string,object> MergeDataAttributes(
this HtmlHelper htmlHelper,
object htmlAttributes,
object dataAttributes)
and call it as
并将其称为
<%= Html.TextBox ("textBox", "Value",
Html.MergeDataAttributes( new { title = "Some ordinary attribute" }, new { myid = m.ID } ) ) %>
