XPathQueryGenerator.CreateFromDataContractSerializer Método

Definição

Cria um XPath de um contrato de dados.Creates an XPath from a data contract.

Sobrecargas

CreateFromDataContractSerializer(Type, MemberInfo[], XmlNamespaceManager)

Cria um XPath de um contrato de dados usando o tipo de contrato de dados, a matriz de elementos de metadados e os namespaces especificados.Creates an XPath from a data contract using the specified data contract type, array of metadata elements, and namespaces.

CreateFromDataContractSerializer(Type, MemberInfo[], StringBuilder, XmlNamespaceManager)

Cria um XPath de um contrato de dados usando o tipo de dados de contrato, a matriz de elementos de metadados, o elemento de nível superior e os namespaces especificados.Creates an XPath from a data contract using the specified contract data type, array of metadata elements, the top level element, and namespaces.

CreateFromDataContractSerializer(Type, MemberInfo[], XmlNamespaceManager)

Cria um XPath de um contrato de dados usando o tipo de contrato de dados, a matriz de elementos de metadados e os namespaces especificados.Creates an XPath from a data contract using the specified data contract type, array of metadata elements, and namespaces.

public:
 static System::String ^ CreateFromDataContractSerializer(Type ^ type, cli::array <System::Reflection::MemberInfo ^> ^ pathToMember, [Runtime::InteropServices::Out] System::Xml::XmlNamespaceManager ^ % namespaces);
public static string CreateFromDataContractSerializer (Type type, System.Reflection.MemberInfo[] pathToMember, out System.Xml.XmlNamespaceManager namespaces);
static member CreateFromDataContractSerializer : Type * System.Reflection.MemberInfo[] * XmlNamespaceManager -> string
Public Shared Function CreateFromDataContractSerializer (type As Type, pathToMember As MemberInfo(), ByRef namespaces As XmlNamespaceManager) As String

Parâmetros

type
Type

O tipo que representa um contrato de dados.The type that represents a data contract.

pathToMember
MemberInfo[]

Os metadados gerados usando o método GetMember da classe Type, que aponta para o membro de dados específico usado para gerar a consulta.The metadata, generated using the GetMember method of the Type class, that points to the specific data member used to generate the query.

namespaces
XmlNamespaceManager

Os namespaces de XML e seus prefixos encontrados no contrato de dados.The XML namespaces and their prefixes found in the data contract.

Retornos

String

String

O XPath gerado com base nos dados de tipo e de membro.The XPath generated from the type and member data.

Exemplos

O exemplo a seguir cria consultas XPath de duas classes às quais DataContractAttribute os DataMemberAttribute atributos e foram aplicados.The following example creates XPath queries from two classes to which the DataContractAttribute and DataMemberAttribute attributes have been applied.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Runtime.Serialization;
using System.Xml;

namespace GeneratPathExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // Get the type of the class that defines the data contract.
            Type t = typeof(Order);

            // Get the meta data for the specific members to be used in the query.
            MemberInfo[] mi = t.GetMember("Product");
            MemberInfo[] mi2 = t.GetMember("Value");
            MemberInfo[] mi3 = t.GetMember("Quantity");

            // Call the function below to generate and display the query.
            GenerateXPath(t, mi);
            GenerateXPath(t, mi2);
            GenerateXPath(t, mi3);

            // Get the type of the second class that defines a data contract.
            Type t2 = typeof(Line);

            // Get the meta data for the member to be used in the query.
            MemberInfo[] mi4 = t2.GetMember("Items");

            GenerateXPath(t2, mi4);

            Console.ReadLine();
        }

        static void GenerateXPath(Type t, MemberInfo[] mi)
        {

            // Create a new name table and name space manager.
            NameTable nt = new NameTable();
            XmlNamespaceManager xname = new XmlNamespaceManager(nt);

            // Generate the query and print it.
            string query = XPathQueryGenerator.CreateFromDataContractSerializer(
                t, mi, out xname);
            Console.WriteLine(query);
            Console.WriteLine();

            // Display the namespaces and prefixes used in the data contract.
            foreach (string s in xname)
                Console.WriteLine("{0}  = {1}", s, xname.LookupNamespace(s));

            Console.WriteLine();
        }
    }

    [DataContract(Namespace = "http://www.cohowinery.com/")]
    public class Line
    {
        private Order[] itemsValue;

        [DataMember]
        public Order[] Items
        {
            get { return itemsValue; }
            set { itemsValue = value; }
        }
    }

    [DataContract(Namespace = "http://contoso.com")]
    public class Order
    {
        private string productValue;
        private int quantityValue;
        private decimal valueValue;

        [DataMember(Name = "cost")]
        public decimal Value
        {
            get { return valueValue; }
            set { valueValue = value; }
        }

        [DataMember(Name = "quantity")]
        public int Quantity
        {
            get { return quantityValue; }
            set { quantityValue = value; }
        }

        [DataMember(Name = "productName")]
        public string Product
        {
            get { return productValue; }
            set { productValue = value; }
        }
    }
}
Imports System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports System.Reflection
Imports System.Runtime.Serialization
Imports System.Xml

Namespace GeneratPathExample

    Class Program

        Shared Sub Main(ByVal args As String())

            ' Get the type of the class that defines the data contract.
            Dim t As Type = GetType(Order)

            ' Get the meta data for the specific members to be used in the query.
            Dim mi As MemberInfo() = t.GetMember("Product")
            Dim mi2 As MemberInfo() = t.GetMember("Value")
            Dim mi3 As MemberInfo() = t.GetMember("Quantity")

            ' Call the function below to generate and display the query.
            GenerateXPath(t, mi)
            GenerateXPath(t, mi2)
            GenerateXPath(t, mi3)


            ' Get the type of the second class that defines a data contract.
            Dim t2 As Type = GetType(Line)

            ' Get the meta data for the member to be used in the query.
            Dim mi4 As MemberInfo() = t2.GetMember("Items")

            GenerateXPath(t2, mi4)

            Console.ReadLine()
        End Sub

        Shared Sub GenerateXPath(ByVal t As Type, ByVal mi As MemberInfo())


            ' Create a new name table and name space manager.
            Dim nt As New NameTable()
            Dim xname As New XmlNamespaceManager(nt)


            ' Generate the query and print it.
            Dim query As String = XPathQueryGenerator.CreateFromDataContractSerializer( _
                t, mi, xname)
            Console.WriteLine(query)
            Console.WriteLine()


            ' Display the namespaces and prefixes used in the data contract.
            Dim s As String
            For Each s In xname
                Console.WriteLine("{0}  = {1}", s, xname.LookupNamespace(s))
            Next

            Console.WriteLine()

        End Sub
    End Class


    <DataContract(Namespace:="http://www.cohowinery.com/")> _
        Public Class Line

        Private itemsValue As Order()

        <DataMember()>
        Public Property Item() As Order()

            Get
                Return itemsValue
            End Get
            Set(ByVal value As Order())
                itemsValue = value
            End Set
        End Property

    End Class

    <DataContract(Namespace:="http://contoso.com")> _
    Public Class Order

        Private productValue As String
        Private quantityValue As Integer
        Private valueValue As Decimal

        <DataMember(Name:="cost")>
        Public Property Value() As String

            Get
                Return valueValue
            End Get
            Set(ByVal value As String)
                valueValue = value
            End Set
        End Property

        <DataMember(Name:="quantity")> _
        Public Property Quantity() As Integer

            Get
                Return quantityValue
            End Get
            set(ByVal value As Integer)
                quantityValue = value
            End Set
        End Property


        <DataMember(Name:="productName")> _
        Public Property Product() As String

            Get
                Return productValue
            End Get
            Set(ByVal value As String)
                productValue = value
            End Set
        End Property
    End Class
End Namespace

Comentários

Para obter mais informações sobre contratos de dados, consulte usando contratos de dados.For more information about data contracts, see Using Data Contracts.

Aplica-se a

CreateFromDataContractSerializer(Type, MemberInfo[], StringBuilder, XmlNamespaceManager)

Cria um XPath de um contrato de dados usando o tipo de dados de contrato, a matriz de elementos de metadados, o elemento de nível superior e os namespaces especificados.Creates an XPath from a data contract using the specified contract data type, array of metadata elements, the top level element, and namespaces.

public:
 static System::String ^ CreateFromDataContractSerializer(Type ^ type, cli::array <System::Reflection::MemberInfo ^> ^ pathToMember, System::Text::StringBuilder ^ rootElementXpath, [Runtime::InteropServices::Out] System::Xml::XmlNamespaceManager ^ % namespaces);
public static string CreateFromDataContractSerializer (Type type, System.Reflection.MemberInfo[] pathToMember, System.Text.StringBuilder? rootElementXpath, out System.Xml.XmlNamespaceManager namespaces);
public static string CreateFromDataContractSerializer (Type type, System.Reflection.MemberInfo[] pathToMember, System.Text.StringBuilder rootElementXpath, out System.Xml.XmlNamespaceManager namespaces);
static member CreateFromDataContractSerializer : Type * System.Reflection.MemberInfo[] * System.Text.StringBuilder * XmlNamespaceManager -> string
Public Shared Function CreateFromDataContractSerializer (type As Type, pathToMember As MemberInfo(), rootElementXpath As StringBuilder, ByRef namespaces As XmlNamespaceManager) As String

Parâmetros

type
Type

O tipo que representa um contrato de dados.The type that represents a data contract.

pathToMember
MemberInfo[]

Os metadados gerados usando o método GetMember da classe Type, que aponta para o membro de dados específico usado para gerar a consulta.The metadata, generated using the GetMember method of the Type class, that points to the specific data member used to generate the query.

rootElementXpath
StringBuilder

O elemento de nível superior no xpath.The top level element in the xpath.

namespaces
XmlNamespaceManager

Os namespaces de XML e seus prefixos encontrados no contrato de dados.The XML namespaces and their prefixes found in the data contract.

Retornos

String

String

O XPath gerado com base nos dados de tipo e de membro.The XPath generated from the type and member data.

Aplica-se a