XmlEnumAttribute Konstruktory

Definice

Obor názvů:

System.Xml.Serialization

Sestavení:

System.Xml.XmlSerializer.dll

Sestavení:

System.Xml.ReaderWriter.dll

Sestavení:

System.Xml.dll

Sestavení:

netstandard.dll

Inicializuje novou instanci XmlEnumAttribute třídy.

Přetížení

XmlEnumAttribute()	Inicializuje novou instanci XmlEnumAttribute třídy.
XmlEnumAttribute(String)	Inicializuje novou instanci XmlEnumAttribute třídy a určuje hodnotu XML, která XmlSerializer generuje nebo rozpozná (když serializuje nebo deserializuje výčet, v uvedeném pořadí).

XmlEnumAttribute()

Inicializuje novou instanci XmlEnumAttribute třídy.

public:
 XmlEnumAttribute();

public XmlEnumAttribute ();

Public Sub New ()

Příklady

Následující příklad serializuje dvě třídy pojmenované Food a FoodType. Třída FoodType obsahuje dva výčty, které jsou přepsány a pro každý výčet vytvoří XmlEnumAttribute příklad objekt, který je přiřazen k XmlEnum vlastnosti objektu XmlAttributes . Příklad pak přidá XmlAttributes objekt do objektu XmlAttributeOverrides , který se používá k vytvoření XmlSerializer.

#using <System.Xml.dll>
#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Serialization;
public enum class FoodType
{
   // Subsequent code overrides these enumerations.
   Low, High
};

// This is the class that will be serialized.
public ref class Food
{
public:
   FoodType Type;
};

// Return an XmlSerializer used for overriding. 
XmlSerializer^ CreateOverrider()
{
   // Create the XmlOverrides and XmlAttributes objects.
   XmlAttributeOverrides^ xOver = gcnew XmlAttributeOverrides;
   XmlAttributes^ xAttrs = gcnew XmlAttributes;

   // Add an XmlEnumAttribute for the FoodType.Low enumeration.
   XmlEnumAttribute^ xEnum = gcnew XmlEnumAttribute;
   xEnum->Name = "Cold";
   xAttrs->XmlEnum = xEnum;
   xOver->Add( FoodType::typeid, "Low", xAttrs );

   // Add an XmlEnumAttribute for the FoodType.High enumeration.
   xAttrs = gcnew XmlAttributes;
   xEnum = gcnew XmlEnumAttribute;
   xEnum->Name = "Hot";
   xAttrs->XmlEnum = xEnum;
   xOver->Add( FoodType::typeid, "High", xAttrs );

   // Create the XmlSerializer, and return it.
   return gcnew XmlSerializer( Food::typeid,xOver );
}

void SerializeObject( String^ filename )
{
   // Create an instance of the XmlSerializer class.
   XmlSerializer^ mySerializer = CreateOverrider();

   // Writing the file requires a TextWriter.
   TextWriter^ writer = gcnew StreamWriter( filename );

   // Create an instance of the class that will be serialized.
   Food^ myFood = gcnew Food;

   // Set the object properties.
   myFood->Type = FoodType::High;

   // Serialize the class, and close the TextWriter.
   mySerializer->Serialize( writer, myFood );
   writer->Close();
}

void DeserializeObject( String^ filename )
{
   XmlSerializer^ mySerializer = CreateOverrider();
   FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
   Food^ myFood = dynamic_cast<Food^>(mySerializer->Deserialize( fs ));
   Console::WriteLine( myFood->Type );
}

int main()
{
   SerializeObject( "OverrideEnum.xml" );
   DeserializeObject( "OverrideEnum.xml" );
}

using System;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

// This is the class that will be serialized.
public class Food
{
   public FoodType Type;
}

public enum FoodType
{
   // Subsequent code overrides these enumerations.
   Low,
   High
}

public class Run
{
   public static void Main()
   {
      Run test = new Run();
      test.SerializeObject("OverrideEnum.xml");
      test.DeserializeObject("OverrideEnum.xml");
   }

   // Return an XmlSerializer used for overriding.
   public XmlSerializer CreateOverrider()
   {
      // Create the XmlOverrides and XmlAttributes objects.
      XmlAttributeOverrides xOver = new XmlAttributeOverrides();
      XmlAttributes xAttrs = new XmlAttributes();

      // Add an XmlEnumAttribute for the FoodType.Low enumeration.
      XmlEnumAttribute xEnum = new XmlEnumAttribute();
      xEnum.Name = "Cold";
      xAttrs.XmlEnum = xEnum;
      xOver.Add(typeof(FoodType), "Low", xAttrs);

      // Add an XmlEnumAttribute for the FoodType.High enumeration.
      xAttrs = new XmlAttributes();
      xEnum = new XmlEnumAttribute();
      xEnum.Name = "Hot";
      xAttrs.XmlEnum = xEnum;
      xOver.Add(typeof(FoodType), "High", xAttrs);

      // Create the XmlSerializer, and return it.
      return new XmlSerializer(typeof(Food), xOver);
   }

   public void SerializeObject(string filename)
   {
      // Create an instance of the XmlSerializer class.
      XmlSerializer mySerializer =  CreateOverrider();
      // Writing the file requires a TextWriter.
      TextWriter writer = new StreamWriter(filename);

      // Create an instance of the class that will be serialized.
      Food myFood = new Food();

      // Set the object properties.
      myFood.Type = FoodType.High;

      // Serialize the class, and close the TextWriter.
      mySerializer.Serialize(writer, myFood);
      writer.Close();
   }

   public void DeserializeObject(string filename)
   {
      XmlSerializer mySerializer = CreateOverrider();
      FileStream fs = new FileStream(filename, FileMode.Open);
      Food myFood = (Food)
      mySerializer.Deserialize(fs);

      Console.WriteLine(myFood.Type);
   }
}

Imports System.IO
Imports System.Xml
Imports System.Xml.Serialization


' This is the class that will be serialized.
Public Class Food
    Public Type As FoodType
End Class

Public Enum FoodType
    ' Subsequent code overrides these enumerations.
    Low
    High
End Enum



Public Class Run
    
    Public Shared Sub Main()
        Dim test As New Run()
        test.SerializeObject("OverrideEnum.xml")
        test.DeserializeObject("OverrideEnum.xml")
    End Sub    
    
    ' Return an XmlSerializer used for overriding. 
    Public Function CreateOverrider() As XmlSerializer
        ' Create the XmlOverrides and XmlAttributes objects.
        Dim xOver As New XmlAttributeOverrides()
        Dim xAttrs As New XmlAttributes()
        
        ' Add an XmlEnumAttribute for the FoodType.Low enumeration.
        Dim xEnum As New XmlEnumAttribute()
        xEnum.Name = "Cold"
        xAttrs.XmlEnum = xEnum
        xOver.Add(GetType(FoodType), "Low", xAttrs)
        
        ' Add an XmlEnumAttribute for the FoodType.High enumeration.
        xAttrs = New XmlAttributes()
        xEnum = New XmlEnumAttribute()
        xEnum.Name = "Hot"
        xAttrs.XmlEnum = xEnum
        xOver.Add(GetType(FoodType), "High", xAttrs)
        
        ' Create the XmlSerializer, and return it.
        Return New XmlSerializer(GetType(Food), xOver)
    End Function
    
        
    Public Sub SerializeObject(ByVal filename As String)
        ' Create an instance of the XmlSerializer class.
        Dim mySerializer As XmlSerializer = CreateOverrider()
        ' Writing the file requires a TextWriter.
        Dim writer As New StreamWriter(filename)
        
        ' Create an instance of the class that will be serialized.
        Dim myFood As New Food()
        
        ' Set the object properties.
        myFood.Type = FoodType.High
        
        ' Serialize the class, and close the TextWriter.
        mySerializer.Serialize(writer, myFood)
        writer.Close()
    End Sub
    
    
    Public Sub DeserializeObject(ByVal filename As String)
        Dim mySerializer As XmlSerializer = CreateOverrider()
        Dim fs As New FileStream(filename, FileMode.Open)
        Dim myFood As Food = CType(mySerializer.Deserialize(fs), Food)
        
        Console.WriteLine(myFood.Type)
    End Sub
End Class

Poznámky

Můžete použít XmlEnumAttribute k přepsání existujícího výčtu.

Poznámka

Slovo XmlEnum v kódu můžete použít místo delšího XmlEnumAttribute.

Viz také

• Serialize(TextWriter, Object)
• Deserialize(Stream)
• XmlSerializer

XmlEnumAttribute(String)

Inicializuje novou instanci XmlEnumAttribute třídy a určuje hodnotu XML, která XmlSerializer generuje nebo rozpozná (když serializuje nebo deserializuje výčet, v uvedeném pořadí).

public:
 XmlEnumAttribute(System::String ^ name);

public XmlEnumAttribute (string name);

public XmlEnumAttribute (string? name);

new System.Xml.Serialization.XmlEnumAttribute : string -> System.Xml.Serialization.XmlEnumAttribute

Public Sub New (name As String)

Parametry

name

String

Přepsání názvu člena výčtu.

Příklady

Následující příklad se týká XmlEnumAttribute členů výčtu. Když vygeneruje XmlSerializer data XML pro tento výčet, data odpovídají hodnotám Name vlastností.

public enum class EmployeeStatus
{
   [XmlEnum("Single")]
   One,
   [XmlEnum("Double")]
   Two,
   [XmlEnum("Triple")]
   Three
};

public enum EmployeeStatus
{
   [XmlEnum("Single")]
   One,
   [XmlEnum("Double")]
   Two,
   [XmlEnum("Triple")]
   Three
}

Public Enum EmployeeStatus
   <XmlEnumAttribute("Single")> One
   <XmlEnumAttribute("Double")> Two
   <XmlEnumAttribute("Triple")> Three
End Enum

Poznámky

Poznámka

Slovo XmlEnum v kódu můžete použít místo delšího XmlEnumAttribute.

Viz také

• Serialize(TextWriter, Object)
• Deserialize(Stream)
• XmlSerializer