asp.net-mvc 如何强制 Razor 使 Editorfor 为浮点变量输入数字类型？
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How to force Razor to make Editorfor to input number type for float variable?
提问by Slicksim
Here is my code in MVC 5:
这是我在 MVC 5 中的代码：
@Html.EditorFor(model => model.myfloatvalue, new { @type = "number", @min = "0", @step = "0.01", @value = "0" })
And here is the html code:
这是 html 代码：
<input class="text-box single-line" data-val="true" data-val-number="The field Fix Amount must be a number." data-val-required="The Fix Amount field is required." id="myfloatvalue" name="myfloatvalue" type="text" value="">
Not to
不
<input class="text-box single-line" data-val="true" data-val-number="The field Fix Amount must be a number." data-val-required="The Fix Amount field is required." id="myfloatvalue" name="myfloatvalue" type="number" min="0" step="0.01" value="0">
What should I do?
Thanks for response!
我该怎么办？
感谢您的回复！
回答by Slicksim
Have you tried wrapping your anonymous object in the htmlAttributesof another anonymous object? When using EditorFor/TextBoxFor, I believe in MVC 5 that's the only way of affecting the HTML attributes output by the editor.
您是否尝试将匿名对象包装在htmlAttributes另一个匿名对象的 中？使用EditorFor/ 时TextBoxFor，我相信 MVC 5 这是影响编辑器输出的 HTML 属性的唯一方法。
@Html.EditorFor(model => model.myfloatvalue, new { htmlAttributes = new { @type = "number", @min = "0", @step = "0.01", @value = "0" }})
If you not using MVC-5.1 or higher, then you will need to use TextBoxFor().
Note no htmlAttributesused here:
如果您不使用 MVC-5.1 或更高版本，那么您将需要使用TextBoxFor(). 注意htmlAttributes这里没有使用：
@Html.TextBoxFor(m => m.myfloatvalue, new { type = "number", min = "0", step = "0.01" }) // don't set the value attribute
回答by tomRedox
You can actually change the default behaviour for the EditorFor for a floatso that it produces type="number"instead of type="text".
您实际上可以为 a 更改 EditorFor 的默认行为，float以便它生成type="number"而不是type="text".
To do that you need to add a custom EditorTemplatefor the Single(notfloat) type to /Views/Shared/EditorTemplates/Single.cshtmlas follows:
为此，您需要EditorTemplate为Single( notfloat) 类型添加自定义，/Views/Shared/EditorTemplates/Single.cshtml如下所示：
@model Single?
@{
var attributes = HtmlHelper.AnonymousObjectToHtmlAttributes(ViewData["htmlAttributes"]);
if (!attributes.ContainsKey("type")) { attributes.Add("type", "number"); }
}
@Html.TextBoxFor(m => m, attributes)
The reason this works is that floatis a C# alias for System.Single(see the Microsoft c# Language Referencefor more details on that). Adding an EditorTemplatecalled Float.cshtml will not work (I tried...).
这样做的原因是它float是 C# 的别名System.Single（有关更多详细信息，请参阅Microsoft c# 语言参考）。添加一个EditorTemplate名为 Float.cshtml 将不起作用（我试过......）。
I got the idea for this from @Stephen Muecke's excellent answer to my question here. He also mentions the idea of creating your own HtmlHelperextension so you could then write @Html.FloatFor(...).
我从@Stephen Muecke在这里对我的问题的出色回答中得到了这个想法。他还提到了创建自己的HtmlHelper扩展的想法，这样你就可以编写@Html.FloatFor(...).
This same approach can also be applied to Decimaland Double, both of which also render type="text"by default.
同样的方法也可以应用于Decimal和Double，这两者也type="text"默认呈现。
