如何编辑模板/显示模板识别分配给它们的任何属性? [英] How can Editor Templates / Display Templates recognize any Attributes assigned to them?
问题描述
我要一个 [必需]
属性添加到我的的DateTime
编辑模板,这样我就可以添加相应的验证方案或 DataType.Date
属性,所以我知道什么时候应该只显示日期。但我无法弄清楚如何获得,说哪些属性编辑器模板已分配给它的元数据。
I want to add a [Required]
attribute to my DateTime
editor template so that I can add the appropriate validation schemes or a DataType.Date
attribute so I know when I should only display dates. But I can't figure out how to get the metadata that says which attributes the Editor Template has assigned to it.
推荐答案
内置的属性,如 [必需]
上的元数据分配不同的属性(请参阅博客文章我已经在我的答案,以了解更多)结束的联系。例如:
The built-in attributes, such as [Required]
assign different properties on the metadata (see the blog post I have linked at the end of my answer to learn more). For example:
public class MyViewModel
{
[Required]
public string Foo { get; set; }
}
将会分配:
@{
var isRequired = ViewData.ModelMetadata.IsRequired;
}
在相应的编辑器/显示模板。
in the corresponding editor/display template.
如果你有一个自定义属性:
And if you had a custom attribute:
public class MyCustomStuffAttribute : Attribute, IMetadataAware
{
public void OnMetadataCreated(ModelMetadata metadata)
{
metadata.AdditionalValues["customStuff"] = "some very custom stuff";
}
}
和视图模型装饰着它:
public class MyViewModel
{
[MyCustomStuff]
public string Foo { get; set; }
}
在相应的编辑器/显示模板,你可以获取这样的:
in the corresponding editor/display template you could fetch this:
@{
var myCustomStuff = ViewData.ModelMetadata.AdditionalValues["customStuff"];
}
此外,你绝对应该阅读布拉德·威尔逊的<一个href=\"http://bradwilson.typepad.com/blog/2009/10/aspnet-mvc-2-templates-part-2-modelmetadata.html\">series博客文章的什么ModelMetadata和ASP.NET MVC的模板,以及如何使用它。
Also you should absolutely read Brad Wilson's series of blog posts about what ModelMetadata and templates in ASP.NET MVC is and how to use it.
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