如果禁用，Html.CheckBox 返回 false，即使已选择 [英] Html.CheckBox returns false if disabled, even if seleced

问题描述

希望对 asp.net mvc 大师来说是一个简单的问题:

Hopefully an easy question for you asp.net mvc gurus:

我有一个复选框，创建方式如下:

I have a checkbox, created like this:

<%=Html.CheckBox("MyCheckBox", true, new { disabled = "disabled"})%>

在我的操作中，我正在像这样检查值:

In my action I am checking the value like so:

bool isChecked = form["MyCheckBox"].Contains("true");

我希望这会返回 true，因为它已被检查.然而，被创建的隐藏元素有一个假值:

I expect this to return true, as it is checked. However the hidden element that gets created has a false value:

<input checked="checked" disabled="disabled" id="MyCheckBox" name="MyCheckBox" type="checkbox" value="true" />
<input name="MyCheckBox" type="hidden" value="false" />

首先，有没有办法让 HtmlHelper 表现得像我期望的那样?还是手动构建输入/创建我自己的辅助方法是唯一的方法?(并不是说这有什么大不了的...)

First, is there a way to make the HtmlHelper behave as I expect it should? Or is manually constructing the input/creating my own helper method the only way? (not that this is a big deal...)

第二，谁能解释为什么复选框会这样?假设已勾选的禁用复选框应该 == 真，我是否不正确?禁用状态在语义上是否意味着错误?

Second, can anyone shed some light on why the checkboxes behave this way? Am I incorrect in assuming a disabled checkbox that is ticked should == true? Does a disabled state semantically mean false?

推荐答案

使用 disabled="disabled" 属性标记的输入字段NEVER 将其值发送到服务器.如果您想实现这一点，您可以使用 readonly="readonly" 属性，该属性仍可防止用户修改值，但在提交表单时发送现有值.

An input field marked with the disabled="disabled" attribute NEVER sends its value to the server. If you want to achieve this you could use the readonly="readonly" attribute which still prevents the user from modifying the value but sends the existing value when the form is submitted.

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