使用验证时,.NET 4 RTM MetadataType属性被忽略 [英] .NET 4 RTM MetadataType attribute ignored when using Validator
问题描述
我使用VS 2010 RTM,并试图使用MetadataTypeAttribute一个简单的类型执行一些基本的验证。当我把验证属性上的主类,一切正常。然而,当我把它的元数据类,它似乎被忽略。我必须失去一些小事,但我一直停留在这一段时间吧。
我看了一下企业库验证模块作为一种解决方法,但它不支持单属性的确认开箱。任何想法?
类节目
{
静态无效的主要(字串[] args)
{
东西T =新的东西();
尝试
{
Validator.ValidateProperty(德克萨斯州,新ValidationContext(T,NULL,NULL){成员名=X});
Console.WriteLine(失败!);
}
赶上(ValidationException)
{
Console.WriteLine(成功了!);
}
}
}
[MetadataType(typeof运算(StuffMetadata))]
公共类的东西
{
// [必填] //这里工作
公共序列X {获得;组; }
}
公共类StuffMetadata
{
[必填] //这里没有任何影响
公共序列X {获得;组; }
}
这似乎验证不尊重MetadataTypeAttribute:
http://forums.silverlight.net/forums/p/149264/ 377212.aspx
的关系必须显式注册的:
TypeDescriptor.AddProviderTransparent(
新AssociatedMetadataTypeTypeDescriptionProvider(
typeof运算(东西),
typeof运算(StuffMetadata)),
typeof运算(东西));
这个辅助类将注册在装配中的所有元数据关系:
公共静态类MetadataTypesRegister
{
安装静态布尔=假;
静态对象installedLock =新的对象();
公共静态无效InstallForThisAssembly()
{
如果(安装)
{
返回;
}
锁定(installedLock)
{
如果(安装)
{
返回;
}
的foreach(类型类型Assembly.GetExecutingAssembly()。GetTypes())
{
的foreach(MetadataTypeAttribute ATTRIB在type.GetCustomAttributes(typeof运算(MetadataTypeAttribute),真))
{
TypeDescriptor.AddProviderTransparent(
新AssociatedMetadataTypeTypeDescriptionProvider(类型,attrib.MetadataClassType),类型);
}
}
安装= TRUE;
}
}
}
I am using VS 2010 RTM and trying to perform some basic validation on a simple type using MetadataTypeAttribute. When I put the validation attribute on the main class, everything works. However, when I put it on the metadata class, it seems to be ignored. I must be missing something trivial, but I've been stuck on this for a while now.
I had a look at the Enterprise Library validation block as a workaround, but it doesn't support validation of single properties out of the box. Any ideas?
class Program
{
static void Main(string[] args)
{
Stuff t = new Stuff();
try
{
Validator.ValidateProperty(t.X, new ValidationContext(t, null, null) { MemberName = "X" });
Console.WriteLine("Failed!");
}
catch (ValidationException)
{
Console.WriteLine("Succeeded!");
}
}
}
[MetadataType(typeof(StuffMetadata))]
public class Stuff
{
//[Required] //works here
public string X { get; set; }
}
public class StuffMetadata
{
[Required] //no effect here
public string X { get; set; }
}
It seems that the Validator doesn't respect MetadataTypeAttribute:
http://forums.silverlight.net/forums/p/149264/377212.aspx
The relationship must be explicity registered:
TypeDescriptor.AddProviderTransparent(
new AssociatedMetadataTypeTypeDescriptionProvider(
typeof(Stuff),
typeof(StuffMetadata)),
typeof(Stuff));
This helper class will register all the metadata relationships in an assembly:
public static class MetadataTypesRegister
{
static bool installed = false;
static object installedLock = new object();
public static void InstallForThisAssembly()
{
if (installed)
{
return;
}
lock (installedLock)
{
if (installed)
{
return;
}
foreach (Type type in Assembly.GetExecutingAssembly().GetTypes())
{
foreach (MetadataTypeAttribute attrib in type.GetCustomAttributes(typeof(MetadataTypeAttribute), true))
{
TypeDescriptor.AddProviderTransparent(
new AssociatedMetadataTypeTypeDescriptionProvider(type, attrib.MetadataClassType), type);
}
}
installed = true;
}
}
}
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