C# xsi:反序列化XML时的类型问题_C#_Xml

C# xsi:反序列化XML时的类型问题

c# xml

C# xsi:反序列化XML时的类型问题,c#,xml,C#,Xml,请原谅我不熟悉XML声明，以及必须从类和定义的角度做些什么才能使序列化/反序列化工作。我正在尝试反序列化以下XML： <?xml version="1.0" encoding="UTF-8"?> <AccessControlPolicy xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <Owner> <ID>946a0786-3840-4007-afe1-76f138a3d31c&

请原谅我不熟悉XML声明，以及必须从类和定义的角度做些什么才能使序列化/反序列化工作。我正在尝试反序列化以下XML：

<?xml version="1.0" encoding="UTF-8"?>
<AccessControlPolicy xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
   <Owner>
      <ID>946a0786-3840-4007-afe1-76f138a3d31c</ID>
   </Owner>
   <AccessControlList>
      <Grant>
         <Grantee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="CanonicalUser">
            <ID>946a0786-3840-4007-afe1-76f138a3d31c</ID>
         </Grantee>
         <Permission>FULL_CONTROL</Permission>
      </Grant> 
   </AccessControlList>
</AccessControlPolicy>


946a0786-3840-4007-afe1-76f138a3d31c
946a0786-3840-4007-afe1-76f138a3d31c
完全控制

引发以下异常：

The specified type was not recognized: name='CanonicalUser', namespace='http://s3.amazonaws.com/doc/2006-03-01/', at <Grantee xmlns='http://s3.amazonaws.com/doc/2006-03-01/'>.

无法识别指定的类型：name='CanonicalUser'，namespace='2'http://s3.amazonaws.com/doc/2006-03-01/",在。

我将代码缩减为以下内容，以便单独复制：

using System; 
using System.Collections.Generic; 
using System.IO; 
using System.Text; 
using System.Xml.Serialization; 

namespace sandbox
{
    public partial class Program
    {
        static void Main(string[] args)
        {
            string xml =
                "<AccessControlPolicy xmlns=\"http://s3.amazonaws.com/doc/2006-03-01/\"><Owner><ID>946a0786-3840-4007-afe1-76f138a3d31c</ID></Owner><AccessControlList><Grant><Grantee xsi:type=\"CanonicalUser\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><ID>946a0786-3840-4007-afe1-76f138a3d31c</ID></Grantee><Permission>FULL_CONTROL</Permission></Grant><Grant><Grantee xsi:type=\"CanonicalUser\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><ID>946a0786-3840-4007-afe1-76f138a3d31c</ID></Grantee><Permission>READ</Permission></Grant><Grant><Grantee xsi:type=\"CanonicalUser\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><ID>946a0786-3840-4007-afe1-76f138a3d31c</ID></Grantee><Permission>WRITE</Permission></Grant><Grant><Grantee xsi:type=\"CanonicalUser\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><ID>946a0786-3840-4007-afe1-76f138a3d31c</ID></Grantee><Permission>READ_ACP</Permission></Grant><Grant><Grantee xsi:type=\"CanonicalUser\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><ID>946a0786-3840-4007-afe1-76f138a3d31c</ID></Grantee><Permission>WRITE_ACP</Permission></Grant></AccessControlList></AccessControlPolicy>";

            try
            {
                AccessControlPolicy acp = DeserializeXml<AccessControlPolicy>(xml);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
                Console.WriteLine(e.Message); 
            }

            Console.ReadLine();
        }

        public static T DeserializeXml<T>(string xml)
        { 
            XmlSerializer xmls = new XmlSerializer(typeof(T));
            using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(xml)))
            {
                return (T)xmls.Deserialize(ms);
            } 
        }
    }

    [XmlRoot(ElementName = "AccessControlPolicy", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
    public class AccessControlPolicy
    {
        [XmlElement(ElementName = "Owner", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public Owner Owner { get; set; }
        [XmlElement(ElementName = "AccessControlList", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public AccessControlList AccessControlList { get; set; }
    }

    [XmlRoot(ElementName = "AccessControlList", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
    public class AccessControlList
    {
        [XmlElement(ElementName = "Grant", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public List<Grant> Grant { get; set; }
    }

    [XmlRoot(ElementName = "Grant", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
    public class Grant
    {
        [XmlElement(ElementName = "Grantee", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public Grantee Grantee { get; set; }
        [XmlElement(ElementName = "Permission", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public string Permission { get; set; }
    }

    [XmlRoot(ElementName = "Grantee", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
    public class Grantee
    {
        [XmlElement(ElementName = "ID", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public string ID { get; set; }
        [XmlElement(ElementName = "URI", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public string URI { get; set; }
        [XmlElement(ElementName = "DisplayName", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public string DisplayName { get; set; }
        [XmlAttribute(AttributeName = "xsi", Namespace = "http://www.w3.org/2000/xmlns/")]
        public string Xsi { get; set; }
        [XmlAttribute(AttributeName = "type", Namespace = "http://www.w3.org/2001/XMLSchema-instance")]
        public string Type { get; set; }
    }

    [XmlRoot(ElementName = "Owner", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
    public class Owner
    {
        [XmlElement(ElementName = "ID", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public string ID { get; set; }
        [XmlElement(ElementName = "DisplayName", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
        public string DisplayName { get; set; }
    }
}

使用系统；
使用System.Collections.Generic；
使用System.IO；
使用系统文本；
使用System.Xml.Serialization；
名称空间沙盒
{
公共部分课程
{
静态void Main（字符串[]参数）
{
字符串xml=
“946a0786-3840-4007-afe1-76f138a3d31c946a0786-3840-4007-afe1-76F138A3D31全控946a0786-3840-4007-afe1-76f138a3d31cREAD946a0786-3840-4007-afe1-76F138A3D31书面946a0786-3840-4007-afe1-76F138A3D31书面ACP946a0786-3840-4007-76F138A3D31书面ACP”；
尝试
{
AccessControlPolicy acp=反序列化xml（xml）；
}
捕获（例外e）
{
Console.WriteLine（如ToString（））；
控制台写入线（e.Message）；
}
Console.ReadLine（）；
}
公共静态T反序列化xml（字符串xml）
{ 
XmlSerializer xmls=新的XmlSerializer（typeof（T））；
使用（MemoryStream ms=newmemoryStream（Encoding.UTF8.GetBytes（xml）））
{
返回（T）xmls.反序列化（ms）；
} 
}
}
[XmlRoot（ElementName=“AccessControlPolicy”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共类访问控制策略
{
[XmlElement（ElementName=“所有者”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共所有者{get；set；}
[XmlElement（ElementName=“AccessControlList”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共访问控制列表访问控制列表{get；set；}
}
[XmlRoot（ElementName=“AccessControlList”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共类访问控制器
{
[XmlElement（ElementName=“Grant”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共列表授予{get；set；}
}
[XmlRoot（ElementName=“Grant”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公费助学金
{
[XmlElement（ElementName=“Grantee”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共受让人{get；set；}
[XmlElement（ElementName=“权限”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共字符串权限{get；set；}
}
[XmlRoot（ElementName=“Grantee”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共级承授人
{
[XmlElement（ElementName=“ID”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共字符串ID{get；set；}
[XmlElement（ElementName=“URI”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共字符串URI{get；set；}
[XmlElement（ElementName=“DisplayName”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共字符串DisplayName{get；set；}
[XmlAttribute（AttributeName=“xsi”，命名空间=”http://www.w3.org/2000/xmlns/")]
公共字符串Xsi{get；set；}
[XmlAttribute（AttributeName=“type”，命名空间=”http://www.w3.org/2001/XMLSchema-instance")]
公共字符串类型{get；set；}
}
[XmlRoot（ElementName=“所有者”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共类所有者
{
[XmlElement（ElementName=“ID”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共字符串ID{get；set；}
[XmlElement（ElementName=“DisplayName”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共字符串DisplayName{get；set；}
}
}

将您的类授权重命名为CanonicalUser

[XmlRoot(ElementName = "AccessControlList", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
public class AccessControlList
{
    [XmlElement(ElementName = "Grant", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
    public List<CanonicalUser> Grant { get; set; }
}

[XmlRoot(ElementName = "Grant", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
public class CanonicalUser
{
    [XmlElement(ElementName = "Grantee", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
    public Grantee Grantee { get; set; }
    [XmlElement(ElementName = "Permission", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/", IsNullable = true)]
    public string Permission { get; set; }
}

[XmlRoot（ElementName=“AccessControlList”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共类访问控制器
{
[XmlElement（ElementName=“Grant”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共列表授予{get；set；}
}
[XmlRoot（ElementName=“Grant”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共类CanonicalUser
{
[XmlElement（ElementName=“Grantee”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共受让人{get；set；}
[XmlElement（ElementName=“权限”，命名空间=”http://s3.amazonaws.com/doc/2006-03-01/“，IsNullable=true）]
公共字符串权限{get；set；}
}

XmlSerializer使用

xsi:type

说明符解析反序列化的目标类

因为您的目标

类

被命名为受让人
，所以您必须使用

XmlType

属性来修饰它，将CanonicalUser
指定为

类型名

[XmlType(TypeName= "CanonicalUser")]
public class Grantee

注意，您可以减少应用于类的

xml名称空间

，如下所示

[XmlRoot(ElementName = "AccessControlPolicy", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/")]
public class AccessControlPolicy
{
    [XmlElement(ElementName = "Owner", IsNullable = true)]
    public Owner Owner { get; set; }

    [XmlElement(ElementName = "AccessControlList", IsNullable = true)]
    public AccessControlList AccessControlList { get; set; }
}

更新

如果要使用不同的

xsi:type

说明符，例如

<Grantee xsi:type="CanonicalUser" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<Grantee xsi:type="AnotherUser" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

xml名称空间看起来

public class Grant
{
    [XmlElement(ElementName = "Grantee",  IsNullable = true)]
    public Grantee Grantee { get; set; }

    [XmlElement(ElementName = "Permission", IsNullable = true)]
    public string Permission { get; set; }
}

[XmlType(TypeName= "CanonicalUser")]
public class Grantee
{
    [XmlElement(ElementName = "ID", IsNullable = true)]
    public string ID { get; set; }

    [XmlElement(ElementName = "URI", IsNullable = true)]
    public string URI { get; set; }

    [XmlElement(ElementName = "DisplayName", IsNullable = true)]
    public string DisplayName { get; set; }
}

public class Owner
{
    [XmlElement(ElementName = "ID",  IsNullable = true)]
    public string ID { get; set; }

    [XmlElement(ElementName = "DisplayName", IsNullable = true)]
    public string DisplayName { get; set; }
}

<Grantee xsi:type="CanonicalUser" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<Grantee xsi:type="AnotherUser" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

[XmlInclude(typeof(CanonicalUser))]
[XmlInclude(typeof(AnotherUser))]
public abstract class Grantee
{
    // ...
} 

[XmlType(TypeName= "CanonicalUser", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/")]        
public class CanonicalUser : Grantee
{}

[XmlType(TypeName = "AnotherUser", Namespace = "http://s3.amazonaws.com/doc/2006-03-01/")]
public class AnotherUser : Grantee
{}