ExcludeAttribute 类

指定实体成员不会存在于实体的代码生成的客户端视图中，且在任何情况下都不应将该值发送至客户端。

命名空间: System.ServiceModel.DomainServices.Server
程序集： System.ServiceModel.DomainServices.Server（在 system.servicemodel.domainservices.server.dll 中）

用法

用法
Dim instance As ExcludeAttribute

语法

声明
<AttributeUsageAttribute(AttributeTargets.Property Or AttributeTargets.Field, AllowMultiple:=False, Inherited:=True)> _
Public NotInheritable Class ExcludeAttribute
    Inherits Attribute

[AttributeUsageAttribute(AttributeTargets.Property|AttributeTargets.Field, AllowMultiple=false, Inherited=true)] 
public sealed class ExcludeAttribute : Attribute

[AttributeUsageAttribute(AttributeTargets::Property|AttributeTargets::Field, AllowMultiple=false, Inherited=true)] 
public ref class ExcludeAttribute sealed : public Attribute

/** @attribute AttributeUsageAttribute(AttributeTargets.Property|AttributeTargets.Field, AllowMultiple=false, Inherited=true) */ 
public final class ExcludeAttribute extends Attribute

AttributeUsageAttribute(AttributeTargets.Property|AttributeTargets.Field, AllowMultiple=false, Inherited=true) 
public final class ExcludeAttribute extends Attribute

示例

下面的示例演示了应用于类型为 Guid、名为 rowguid 的属性的 ExcludeAttribute。

<MetadataTypeAttribute(GetType(Address.AddressMetadata))>  _
Partial Public Class Address
    
    Friend NotInheritable Class AddressMetadata
        
        'Metadata classes are not meant to be instantiated.
        Private Sub New()
            MyBase.New
        End Sub
        
        Public AddressID As Integer

        <Required()> _
        <StringLength(60)> _
        <RoundtripOriginal()> _
        Public AddressLine1 As String

        <RoundtripOriginal()> _
        Public AddressLine2 As String

        <Required()> _
        <StringLength(30)> _
        <RoundtripOriginal()> _
        Public City As String

        <RoundtripOriginal()> _
        Public CountryRegion As String
        
        Public CustomerAddresses As EntityCollection(Of CustomerAddress)

        <RoundtripOriginal()> _
        Public ModifiedDate As DateTime

        <Required()> _
        <RoundtripOriginal()> _
        Public PostalCode As String

        <Exclude()> _
        Public rowguid As Guid

        <RoundtripOriginal()> _
        Public StateProvince As String
    End Class
End Class

[MetadataTypeAttribute(typeof(Address.AddressMetadata))]
public partial class Address
{

    internal sealed class AddressMetadata
    {
        // Metadata classes are not meant to be instantiated.
        private AddressMetadata()
        {
        }

        public int AddressID { get; set; }

        [Required]
        [StringLength(60)]
        [RoundtripOriginal]
        public string AddressLine1 { get; set; }

        [RoundtripOriginal]
        public string AddressLine2 { get; set; }

        [Required]
        [StringLength(30)]
        [RoundtripOriginal]
        public string City { get; set; }

        [RoundtripOriginal]
        public string CountryRegion { get; set; }

        public EntityCollection<CustomerAddress> CustomerAddresses { get; set; }

        [RoundtripOriginal]
        public DateTime ModifiedDate { get; set; }

        [Required]
        [RoundtripOriginal]
        public string PostalCode { get; set; }

        [Exclude]
        public Guid rowguid { get; set; }

        [RoundtripOriginal]
        public string StateProvince { get; set; }
    }
}

备注

如果您希望令客户端应用程序无法使用某个属性，则可将 ExcludeAttribute 特性应用于该属性。许多值（如标识值）在数据源进行管理并且无需在客户端进行显示或编辑。

继承层次结构

System.Object
   System.Attribute
    System.ServiceModel.DomainServices.Server.ExcludeAttribute

线程安全

此类型的任何公共静态（在 Visual Basic 中为 共享）成员都是线程安全的。不保证所有实例成员都是线程安全的。

平台

开发平台

Windows XP Home Edition, Windows XP Professional, Windows Server 2003 、Windows Server 2008 和 Windows 2000

目标平台

Change History

另请参见

参考

ExcludeAttribute 成员
System.ServiceModel.DomainServices.Server 命名空间