C# MVC 4 剃刀数据注释只读
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MVC 4 razor Data Annotations ReadOnly
提问by Soenhay
The ReadOnly attribute does not seem to be in MVC 4. The Editable(false) attribute does not work the way I would want it to.
ReadOnly 属性似乎不在 MVC 4 中。 Editable(false) 属性不能按照我希望的方式工作。
Is there something similar that works?
有没有类似的东西有效？
If not then how can I make my own ReadOnly attribute that would work like this:
如果不是，那么我如何制作自己的 ReadOnly 属性，它会像这样工作：
public class aModel
{
[ReadOnly(true)] or just [ReadOnly]
string aProperty {get; set;}
}
so I can put this:
所以我可以把这个：
@Html.TextBoxFor(x=> x.aProperty)
instead of this ( which does work ):
而不是这个（确实有效）：
@Html.TextBoxFor(x=> x.aProperty , new { @readonly="readonly"})
or this ( which does work but values are not submitted ):
或此（确实有效但未提交值）：
@Html.TextBoxFor(x=> x.aProperty , new { disabled="disabled"})
http://view.jquerymobile.com/1.3.2/dist/demos/widgets/forms/form-disabled.html
http://view.jquerymobile.com/1.3.2/dist/demos/widgets/forms/form-disabled.html
something like this maybe? https://stackoverflow.com/a/11702643/1339704
也许像这样的事情？ https://stackoverflow.com/a/11702643/1339704
Note:
笔记：
[Editable(false)] did not work
[Editable(false)] 不起作用
采纳答案by asymptoticFault
You can create a custom helper like this that will check the property for the presence of a ReadOnlyattribute:
您可以创建一个像这样的自定义帮助程序，它将检查属性是否存在ReadOnly属性：
public static MvcHtmlString MyTextBoxFor<TModel, TValue>(
this HtmlHelper<TModel> helper, Expression<Func<TModel, TValue>> expression)
{
var metaData = ModelMetadata.FromLambdaExpression(expression, helper.ViewData);
// in .NET 4.5 you can use the new GetCustomAttribute<T>() method to check
// for a single instance of the attribute, so this could be slightly
// simplified to:
// var attr = metaData.ContainerType.GetProperty(metaData.PropertyName)
// .GetCustomAttribute<ReadOnly>();
// if (attr != null)
bool isReadOnly = metaData.ContainerType.GetProperty(metaData.PropertyName)
.GetCustomAttributes(typeof(ReadOnly), false)
.Any();
if (isReadOnly)
return helper.TextBoxFor(expression, new { @readonly = "readonly" });
else
return helper.TextBoxFor(expression);
}
The attribute is simply:
属性很简单：
public class ReadOnly : Attribute
{
}
For an example model:
对于示例模型：
public class TestModel
{
[ReadOnly]
public string PropX { get; set; }
public string PropY { get; set; }
}
I have verified this works with the follow razor code:
我已经使用以下剃刀代码验证了这一点：
@Html.MyTextBoxFor(m => m.PropX)
@Html.MyTextBoxFor(m => m.PropY)
Which renders as:
呈现为：
<input id="PropX" name="PropX" readonly="readonly" type="text" value="Propx" />
<input id="PropY" name="PropY" type="text" value="PropY" />
If you need disabledinstead of readonlyyou can easily change the helper accordingly.
如果您需要disabled，readonly您可以轻松地相应地更改助手。
回答by KerSplosh
You could create your own Html Helper Method
您可以创建自己的 Html Helper Method
See here: Creating Customer Html Helpers
请参阅此处： 创建客户 Html 帮助程序
Actually - check out this answer
实际上 - 看看这个答案
public static MvcHtmlString MyTextBoxFor<TModel, TProperty>(
this HtmlHelper<TModel> helper,
Expression<Func<TModel, TProperty>> expression)
{
return helper.TextBoxFor(expression, new { @readonly="readonly" })
}
