Type.GetProperty Metodo

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

public:
 virtual System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, Type ^ returnType, cli::array <Type ^> ^ types, cli::array <System::Reflection::ParameterModifier> ^ modifiers);

[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.NonPublicProperties | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)]
public System.Reflection.PropertyInfo? GetProperty(string name, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder? binder, Type? returnType, Type[] types, System.Reflection.ParameterModifier[]? modifiers);

public System.Reflection.PropertyInfo GetProperty(string name, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, Type returnType, Type[] types, System.Reflection.ParameterModifier[] modifiers);

public System.Reflection.PropertyInfo? GetProperty(string name, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder? binder, Type? returnType, Type[] types, System.Reflection.ParameterModifier[]? modifiers);

[<System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.NonPublicProperties | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)>]
abstract member GetProperty : string * System.Reflection.BindingFlags * System.Reflection.Binder * Type * Type[] * System.Reflection.ParameterModifier[] -> System.Reflection.PropertyInfo
override this.GetProperty : string * System.Reflection.BindingFlags * System.Reflection.Binder * Type * Type[] * System.Reflection.ParameterModifier[] -> System.Reflection.PropertyInfo

abstract member GetProperty : string * System.Reflection.BindingFlags * System.Reflection.Binder * Type * Type[] * System.Reflection.ParameterModifier[] -> System.Reflection.PropertyInfo
override this.GetProperty : string * System.Reflection.BindingFlags * System.Reflection.Binder * Type * Type[] * System.Reflection.ParameterModifier[] -> System.Reflection.PropertyInfo

Public Function GetProperty (name As String, bindingAttr As BindingFlags, binder As Binder, returnType As Type, types As Type(), modifiers As ParameterModifier()) As PropertyInfo

Parametri

Valori restituiti

Oggetto che rappresenta la proprietà che soddisfa i requisiti specificati, se trovato; in caso contrario, null.

Implementazioni

Attributi

DynamicallyAccessedMembersAttribute

Eccezioni

Commenti

Per altre informazioni su questa API, vedere Osservazioni supplementari sull'API per Type.GetProperty.

Vedi anche

• PropertyInfo
• String
• BindingFlags
• Binder
• DefaultBinder
• ParameterModifier
• GetPropertyImpl(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])
• GetProperties(BindingFlags)

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

public:
 System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name);

public:
 virtual System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name);

[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)]
public System.Reflection.PropertyInfo? GetProperty(string name);

public System.Reflection.PropertyInfo GetProperty(string name);

public System.Reflection.PropertyInfo? GetProperty(string name);

[<System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)>]
member this.GetProperty : string -> System.Reflection.PropertyInfo

member this.GetProperty : string -> System.Reflection.PropertyInfo

abstract member GetProperty : string -> System.Reflection.PropertyInfo
override this.GetProperty : string -> System.Reflection.PropertyInfo

Public Function GetProperty (name As String) As PropertyInfo

Parametri

Valori restituiti

Oggetto che rappresenta la proprietà pubblica con il nome specificato, se trovato; in caso contrario, null.

Implementazioni

Attributi

DynamicallyAccessedMembersAttribute

Eccezioni

Esempio

Nell'esempio seguente viene recuperato l'oggetto Type di una classe definita dall'utente, viene recuperata una proprietà di tale classe e viene visualizzato il nome della proprietà.

using System;
using System.Reflection;

class MyClass1
{
    // Declare MyProperty.
    public int MyProperty { get; set; }
}

public class MyTypeClass1
{
    public static void Main(string[] args)
    {
        try
        {
            // Get the Type object corresponding to MyClass1.
            Type myType = typeof(MyClass1);

            // Get the PropertyInfo object by passing the property name.
            PropertyInfo myPropInfo = myType.GetProperty("MyProperty");

            // Display the property name.
            Console.WriteLine("The {0} property exists in MyClass1.", myPropInfo.Name);
        }
        catch (NullReferenceException e)
        {
            Console.WriteLine("The property does not exist in MyClass1." + e.Message);
        }
    }
}

open System

type MyClass() =
    let mutable myProperty = 0
    // Declare MyProperty.
    member _.MyProperty
        with get () =
            myProperty
        and set (value) = 
            myProperty <- value

try
    // Get the Type object corresponding to MyClass.
    let myType = typeof<MyClass>
    // Get the PropertyInfo object by passing the property name.
    let myPropInfo = myType.GetProperty "MyProperty"
    // Display the property name.
    printfn $"The {myPropInfo.Name} property exists in MyClass."
with :? NullReferenceException as e ->
    printfn $"The property does not exist in MyClass.{e.Message}"

Imports System.Reflection
Class MyClass1
    Private myProperty1 As Integer
    ' Declare MyProperty.

    Public Property MyProperty() As Integer
        Get
            Return MyProperty1
        End Get
        Set(ByVal Value As Integer)
            MyProperty1 = Value
        End Set
    End Property
End Class

Public Class MyTypeClass
    Public Shared Sub Run(ByVal args() As String)
        Try
            ' Get Type Object corresponding to MyClass.
            Dim myType As Type = GetType(MyClass1)
            ' Get PropertyInfo object by passing property name.
            Dim myPropInfo As PropertyInfo = myType.GetProperty("MyProperty")
            ' Display Name property to console.
            Console.WriteLine("The {0} property exists in MyClass.", myPropInfo.Name)
        Catch e As NullReferenceException
            Console.WriteLine("The property does not exist in MyClass.", e.Message.ToString())
        End Try
    End Sub
End Class

Commenti

Per altre informazioni su questa API, vedere Osservazioni supplementari sull'API per Type.GetProperty.

Vedi anche

• PropertyInfo
• String
• DefaultBinder
• GetPropertyImpl(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])
• GetProperties(BindingFlags)

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

public:
 virtual System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, System::Reflection::BindingFlags bindingAttr);

[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.NonPublicProperties | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)]
public System.Reflection.PropertyInfo? GetProperty(string name, System.Reflection.BindingFlags bindingAttr);

public System.Reflection.PropertyInfo GetProperty(string name, System.Reflection.BindingFlags bindingAttr);

public System.Reflection.PropertyInfo? GetProperty(string name, System.Reflection.BindingFlags bindingAttr);

[<System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.NonPublicProperties | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)>]
abstract member GetProperty : string * System.Reflection.BindingFlags -> System.Reflection.PropertyInfo
override this.GetProperty : string * System.Reflection.BindingFlags -> System.Reflection.PropertyInfo

abstract member GetProperty : string * System.Reflection.BindingFlags -> System.Reflection.PropertyInfo
override this.GetProperty : string * System.Reflection.BindingFlags -> System.Reflection.PropertyInfo

Public Function GetProperty (name As String, bindingAttr As BindingFlags) As PropertyInfo

Parametri

Valori restituiti

Oggetto che rappresenta la proprietà che soddisfa i requisiti specificati, se trovato; in caso contrario, null.

Implementazioni

Attributi

DynamicallyAccessedMembersAttribute

Eccezioni

Esempio

Nell'esempio seguente viene recuperato il tipo di una classe definita dall'utente, viene recuperata una proprietà di tale classe e viene visualizzato il nome della proprietà in base ai vincoli di associazione specificati.

using System;
using System.Reflection;

class MyClass2
{
    // Declare MyProperty.
    public int MyProperty { get; set; }
}

public class MyTypeClass2
{
    public static void Main(string[] args)
    {
        try
        {
            // Get Type object of MyClass2.
            Type myType = typeof(MyClass2);

            // Get the PropertyInfo by passing the property name and specifying the BindingFlags.
            PropertyInfo myPropInfo = myType.GetProperty(
                "MyProperty",
                BindingFlags.Public | BindingFlags.Instance
                );

            // Display Name property to console.
            Console.WriteLine("{0} is a property of MyClass2.", myPropInfo.Name);
        }
        catch (NullReferenceException e)
        {
            Console.WriteLine("MyProperty does not exist in MyClass2." + e.Message);
        }
    }
}

open System
open System.Reflection

type MyClass() =
    let mutable myProperty = 0
    // Declare MyProperty.
    member _.MyProperty
        with get () =
            myProperty
        and set (value) =
            myProperty <- value

try
    // Get Type object of MyClass.
    let myType = typeof<MyClass>
    // Get the PropertyInfo by passing the property name and specifying the BindingFlags.
    let myPropInfo = myType.GetProperty("MyProperty", BindingFlags.Public ||| BindingFlags.Instance)
    // Display Name property to console.
    printfn $"{myPropInfo.Name} is a property of MyClass."
with :? NullReferenceException as e ->
    printfn $"MyProperty does not exist in MyClass.{e.Message}"

Imports System.Reflection
Module Module1
    Public Class MyClass1
        Private myProperty1 As Integer

        Public Property MyProperty() As Integer
            Get
                Return myProperty1
            End Get
            Set(ByVal Value As Integer)
                myProperty1 = Value
            End Set
        End Property

        Public Shared Sub Run()
            Try
                ' Get a Type object corresponding to MyClass.
                Dim myType As Type = GetType(MyClass1)
                ' Get a PropertyInfo object by passing property name and specifying BindingFlags.
                Dim myPropInfo As PropertyInfo = myType.GetProperty("MyProperty", BindingFlags.Public Or BindingFlags.Instance)
                ' Display the Name property.
                Console.WriteLine("{0} is a property of MyClass.", myPropInfo.Name)
            Catch e As NullReferenceException
                Console.WriteLine("MyProperty does not exist in MyClass.", e.Message.ToString())
            End Try
        End Sub
    End Class
End Module 'Module1

Vedi anche

• PropertyInfo
• String
• BindingFlags
• DefaultBinder
• GetPropertyImpl(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])
• GetProperties(BindingFlags)

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

public:
 System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, Type ^ returnType);

public:
 virtual System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, Type ^ returnType);

[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)]
public System.Reflection.PropertyInfo? GetProperty(string name, Type? returnType);

public System.Reflection.PropertyInfo GetProperty(string name, Type returnType);

public System.Reflection.PropertyInfo? GetProperty(string name, Type? returnType);

[<System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)>]
member this.GetProperty : string * Type -> System.Reflection.PropertyInfo

member this.GetProperty : string * Type -> System.Reflection.PropertyInfo

abstract member GetProperty : string * Type -> System.Reflection.PropertyInfo
override this.GetProperty : string * Type -> System.Reflection.PropertyInfo

Public Function GetProperty (name As String, returnType As Type) As PropertyInfo

Parametri

Valori restituiti

Oggetto che rappresenta la proprietà pubblica con il nome specificato, se trovato; in caso contrario, null.

Implementazioni

Attributi

DynamicallyAccessedMembersAttribute

Eccezioni

Esempio

L'esempio seguente definisce una classe con una proprietà e recupera il nome e il tipo della proprietà.

using System;
using System.Reflection;

class MyPropertyTypeClass
{
    public string MyProperty1 { get; set; } = "Hello World.";
}

class TestClass
{
    static void Main()
    {
        try
        {
            Type myType = typeof(MyPropertyTypeClass);

            // Get the PropertyInfo object representing MyProperty1.
            PropertyInfo myStringProperties1 = myType.GetProperty("MyProperty1", typeof(string));

            Console.WriteLine("The name of the first property of MyPropertyTypeClass is {0}.",
                myStringProperties1.Name);
            Console.WriteLine("The type of the first property of MyPropertyTypeClass is {0}.",
                myStringProperties1.PropertyType);
        }
        catch (ArgumentNullException e)
        {
            Console.WriteLine("ArgumentNullException :" + e.Message);
        }
        catch (AmbiguousMatchException e)
        {
            Console.WriteLine("AmbiguousMatchException :" + e.Message);
        }
        catch (NullReferenceException e)
        {
            Console.WriteLine("Source : {0}", e.Source);
            Console.WriteLine("Message : {0}", e.Message);
        }
        //Output:
        //The name of the first property of MyPropertyTypeClass is MyProperty1.
        //The type of the first property of MyPropertyTypeClass is System.String.
    }
}

open System
open System.Reflection

type MyClass1() =
    let mutable myMessage = "Hello World."
    member _.MyProperty1 
        with get () =
            myMessage
        and set (value) =
            myMessage <- value

try
    let myType = typeof<MyClass1>
    // Get the PropertyInfo object representing MyProperty1.
    let myStringProperties1 = myType.GetProperty("MyProperty1", typeof<string>)
    printfn $"The name of the first property of MyClass1 is {myStringProperties1.Name}."
    printfn $"The type of the first property of MyClass1 is {myStringProperties1.PropertyType}."
with
| :? ArgumentNullException as e ->
    printfn $"ArgumentNullException :{e.Message}"
| :? AmbiguousMatchException as e ->
    printfn $"AmbiguousMatchException :{e.Message}"
| :? NullReferenceException as e ->
    printfn $"Source : {e.Source}"
    printfn $"Message : {e.Message}"
// Output:
//     The name of the first property of MyClass1 is MyProperty1.
//     The type of the first property of MyClass1 is System.String.

Imports System.Reflection
Class MyTypesClass
    Private myMessage As [String] = "Hello World."
    Public Property MyProperty1() As String
        Get
            Return myMessage
        End Get
        Set(ByVal Value As String)
            myMessage = Value
        End Set
    End Property
End Class

Class TestClass
    Shared Sub Run()
        Try
            Dim myType As Type = GetType(MyTypesClass)
            ' Get the PropertyInfo object representing MyProperty1. 
            Dim myStringProperties1 As PropertyInfo = myType.GetProperty("MyProperty1", GetType(String))
            Console.WriteLine("The name of the first property of MyTypesClass is {0}.", myStringProperties1.Name)
            Console.WriteLine("The type of the first property of MyTypesClass is {0}.", myStringProperties1.PropertyType.ToString())
        Catch e As ArgumentNullException
            Console.WriteLine("ArgumentNullException :" + e.Message.ToString())
        Catch e As AmbiguousMatchException
            Console.WriteLine("AmbiguousMatchException :" + e.Message.ToString())
        Catch e As NullReferenceException
            Console.WriteLine("Source : {0}", e.Source.ToString())
            Console.WriteLine("Message : {0}", e.Message.ToString())
        End Try

        'Output:
        'The name of the first property of MyTypesClass is MyProperty1.
        'The type of the first property of MyTypesClass is System.String.
    End Sub
End Class

Commenti

Una proprietà viene considerata pubblica ai fini della riflessione se ha almeno un accessore pubblico. In caso contrario, la proprietà è considerata privata ed è necessario usare BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static (in Visual Basic combinare i valori usando Or) per ottenerla.

La ricerca name fa distinzione tra maiuscole e minuscole. La ricerca include le proprietà pubbliche statiche e di istanza.

Se l'oggetto corrente Type rappresenta un tipo generico costruito, questo metodo restituisce PropertyInfo con i parametri di tipo sostituiti dagli argomenti di tipo appropriati.

Se l'oggetto corrente Type rappresenta un parametro di tipo nella definizione di un tipo generico o di un metodo generico, questo metodo cerca le proprietà del vincolo di classe.

Vedi anche

• PropertyInfo
• String
• DefaultBinder
• GetPropertyImpl(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])
• GetProperties(BindingFlags)

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

public:
 System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, cli::array <Type ^> ^ types);

public:
 virtual System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, cli::array <Type ^> ^ types);

[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)]
public System.Reflection.PropertyInfo? GetProperty(string name, Type[] types);

public System.Reflection.PropertyInfo GetProperty(string name, Type[] types);

public System.Reflection.PropertyInfo? GetProperty(string name, Type[] types);

[<System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)>]
member this.GetProperty : string * Type[] -> System.Reflection.PropertyInfo

member this.GetProperty : string * Type[] -> System.Reflection.PropertyInfo

abstract member GetProperty : string * Type[] -> System.Reflection.PropertyInfo
override this.GetProperty : string * Type[] -> System.Reflection.PropertyInfo

Public Function GetProperty (name As String, types As Type()) As PropertyInfo

Parametri

Valori restituiti

Oggetto che rappresenta la proprietà pubblica i cui parametri corrispondono ai tipi di argomento specificati, se trovato; in caso contrario, null.

Implementazioni

Attributi

DynamicallyAccessedMembersAttribute

Eccezioni

Esempio

Nell'esempio seguente viene recuperato l'oggetto Type di una classe definita dall'utente, viene recuperata la proprietà della classe e viene visualizzato il nome della proprietà e il tipo della proprietà come specificato dagli argomenti passati a GetProperty.

using System;
using System.Reflection;

class MyClass3
{
    private readonly int[,] _myArray = { { 1, 2 }, { 3, 4 } };
    // Declare an indexer.
    public int this[int i, int j]
    {
        get
        {
            return _myArray[i, j];
        }
        set
        {
            _myArray[i, j] = value;
        }
    }
}

public class MyTypeClass3
{
    public static void Main(string[] args)
    {
        try
        {
            // Get the Type object.
            Type myType = typeof(MyClass3);
            Type[] myTypeArr = new Type[2];

            // Create an instance of a Type array.
            myTypeArr.SetValue(typeof(int), 0);
            myTypeArr.SetValue(typeof(int), 1);

            // Get the PropertyInfo object for the indexed property Item, which has two integer parameters.
            PropertyInfo myPropInfo = myType.GetProperty("Item", myTypeArr);

            // Display the property.
            Console.WriteLine("The {0} property exists in MyClass3.",
                myPropInfo.ToString());
        }
        catch (NullReferenceException e)
        {
            Console.WriteLine("An exception occurred.");
            Console.WriteLine("Source : {0}", e.Source);
            Console.WriteLine("Message : {0}", e.Message);
        }
    }
}

open System

type MyClass1() =
    let myArray = array2D [[1; 2]; [3; 4]]
    // Declare an indexed property.
    member _.Item
        with get (i, j) =
            myArray[i, j]
        and set (i, j) value =
            myArray[i, j] <- value
try
    // Get the Type object.
    let myType = typeof<MyClass1>
    let myTypeArr = Array.zeroCreate<Type> 2
    // Create an instance of a Type array.
    myTypeArr.SetValue(typeof<int>, 0)
    myTypeArr.SetValue(typeof<int>, 1)
    // Get the PropertyInfo object for the indexed property Item, which has two integer parameters.
    let myPropInfo = myType.GetProperty("Item", myTypeArr)
    // Display the property.
    printfn $"The {myPropInfo} property exists in MyClass1."
with :? NullReferenceException as e ->
    printfn "An exception occurred."
    printfn $"Source : {e.Source}" 
    printfn $"Message : {e.Message}"

Imports System.Reflection

Module Module3
    Class MyClass3
        Private myArray As Integer(,) = {{1, 2}, {3, 4}}
        ' Declare an indexer.
        Default Public Property Item(ByVal i As Integer, ByVal j As Integer) As Integer
            Get
                Return myArray(i, j)
            End Get
            Set(ByVal Value As Integer)

                myArray(i, j) = Value
            End Set
        End Property
    End Class

    Public Class MyTypeClass3
        Public Shared Sub Run()
            Try
                ' Get the Type Object.
                Dim myType As Type = GetType(MyClass3)
                Dim myTypeArr(1) As Type
                ' Create an instance of a Type array.
                myTypeArr.SetValue(GetType(Integer), 0)
                myTypeArr.SetValue(GetType(Integer), 1)
                ' Get the PropertyInfo object for the indexed property Item, which has two integer parameters. 
                Dim myPropInfo As PropertyInfo = myType.GetProperty("Item", myTypeArr)
                ' Display the property.
                Console.WriteLine("The {0} property exists in MyClass3.", myPropInfo.ToString())
            Catch e As NullReferenceException
                Console.WriteLine("An exception occurred.")
                Console.WriteLine("Source : {0}", e.Source.ToString())
                Console.WriteLine("Message : {0}", e.Message.ToString())
            End Try
        End Sub
    End Class
End Module 'Module3

Commenti

Una proprietà viene considerata pubblica ai fini della riflessione se ha almeno un accessore pubblico. In caso contrario, la proprietà è considerata privata ed è necessario usare BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static (in Visual Basic combinare i valori usando Or) per ottenerla.

La ricerca name fa distinzione tra maiuscole e minuscole. La ricerca include le proprietà pubbliche statiche e di istanza.

Se l'oggetto corrente Type rappresenta un tipo generico costruito, questo metodo restituisce PropertyInfo con i parametri di tipo sostituiti dagli argomenti di tipo appropriati.

Se l'oggetto corrente Type rappresenta un parametro di tipo nella definizione di un tipo generico o di un metodo generico, questo metodo cerca le proprietà del vincolo di classe.

Vedi anche

• PropertyInfo
• String
• DefaultBinder
• GetPropertyImpl(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])
• GetProperties(BindingFlags)

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

public:
 System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, Type ^ returnType, cli::array <Type ^> ^ types);

public:
 virtual System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, Type ^ returnType, cli::array <Type ^> ^ types);

[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)]
public System.Reflection.PropertyInfo? GetProperty(string name, Type? returnType, Type[] types);

public System.Reflection.PropertyInfo GetProperty(string name, Type returnType, Type[] types);

public System.Reflection.PropertyInfo? GetProperty(string name, Type? returnType, Type[] types);

[<System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)>]
member this.GetProperty : string * Type * Type[] -> System.Reflection.PropertyInfo

member this.GetProperty : string * Type * Type[] -> System.Reflection.PropertyInfo

abstract member GetProperty : string * Type * Type[] -> System.Reflection.PropertyInfo
override this.GetProperty : string * Type * Type[] -> System.Reflection.PropertyInfo

Public Function GetProperty (name As String, returnType As Type, types As Type()) As PropertyInfo

Parametri

Valori restituiti

Oggetto che rappresenta la proprietà pubblica i cui parametri corrispondono ai tipi di argomento specificati, se trovato; in caso contrario, null.

Implementazioni

Attributi

DynamicallyAccessedMembersAttribute

Eccezioni

Commenti

Una proprietà viene considerata pubblica ai fini della riflessione se ha almeno un accessore pubblico. In caso contrario, la proprietà è considerata privata ed è necessario usare BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static (in Visual Basic combinare i valori usando Or) per ottenerla.

La ricerca name fa distinzione tra maiuscole e minuscole. La ricerca include le proprietà pubbliche statiche e di istanza.

Se l'oggetto corrente Type rappresenta un tipo generico costruito, questo metodo restituisce PropertyInfo con i parametri di tipo sostituiti dagli argomenti di tipo appropriati.

Se l'oggetto corrente Type rappresenta un parametro di tipo nella definizione di un tipo generico o di un metodo generico, questo metodo cerca le proprietà del vincolo di classe.

Vedi anche

• PropertyInfo
• String
• DefaultBinder
• GetPropertyImpl(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])
• GetProperties(BindingFlags)

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

Origine:

Type.cs

public:
 System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, Type ^ returnType, cli::array <Type ^> ^ types, cli::array <System::Reflection::ParameterModifier> ^ modifiers);

public:
 virtual System::Reflection::PropertyInfo ^ GetProperty(System::String ^ name, Type ^ returnType, cli::array <Type ^> ^ types, cli::array <System::Reflection::ParameterModifier> ^ modifiers);

[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)]
public System.Reflection.PropertyInfo? GetProperty(string name, Type? returnType, Type[] types, System.Reflection.ParameterModifier[]? modifiers);

public System.Reflection.PropertyInfo GetProperty(string name, Type returnType, Type[] types, System.Reflection.ParameterModifier[] modifiers);

public System.Reflection.PropertyInfo? GetProperty(string name, Type? returnType, Type[] types, System.Reflection.ParameterModifier[]? modifiers);

[<System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)>]
member this.GetProperty : string * Type * Type[] * System.Reflection.ParameterModifier[] -> System.Reflection.PropertyInfo

member this.GetProperty : string * Type * Type[] * System.Reflection.ParameterModifier[] -> System.Reflection.PropertyInfo

abstract member GetProperty : string * Type * Type[] * System.Reflection.ParameterModifier[] -> System.Reflection.PropertyInfo
override this.GetProperty : string * Type * Type[] * System.Reflection.ParameterModifier[] -> System.Reflection.PropertyInfo

Public Function GetProperty (name As String, returnType As Type, types As Type(), modifiers As ParameterModifier()) As PropertyInfo

Parametri

Valori restituiti

Oggetto che rappresenta la proprietà pubblica che soddisfa i requisiti specificati, se trovato; in caso contrario, null.

Implementazioni

Attributi

DynamicallyAccessedMembersAttribute

Eccezioni

Esempio

Nell'esempio seguente viene ottenuto un Type oggetto corrispondente a MyPropertyClasse la proprietà indicizzata di questa classe viene recuperata utilizzando gli argomenti passati al GetProperty metodo .

using System;
using System.Reflection;

public class MyPropertyClass
{
    private readonly int [,] _myPropertyArray = new int[10,10];
    // Declare an indexer.
    public int this [int i,int j]
    {
        get
        {
            return _myPropertyArray[i,j];
        }
        set
        {
            _myPropertyArray[i,j] = value;
        }
    }
}

public class MyTypeClass
{
    public static void Main()
    {
        try
        {
            Type myType=typeof(MyPropertyClass);
            Type[] myTypeArray = new Type[2];

            // Create an instance of the Type array representing the number, order
            // and type of the parameters for the property.
            myTypeArray.SetValue(typeof(int),0);
            myTypeArray.SetValue(typeof(int),1);

            // Search for the indexed property whose parameters match the
            // specified argument types and modifiers.
            PropertyInfo myPropertyInfo = myType.GetProperty("Item",
                typeof(int),myTypeArray,null);
            Console.WriteLine(myType.FullName + "." + myPropertyInfo.Name +
                " has a property type of " + myPropertyInfo.PropertyType);
         }
        catch(Exception ex)
        {
            Console.WriteLine("An exception occurred " + ex.Message);
        }
    }
}

open System

type MyPropertyClass() =
    let myPropertyArray = Array2D.zeroCreate<int> 10 10
    // Declare an indexed property.
    member _.Item
        with get (i, j) =
            myPropertyArray[i, j]
        and set (i, j) value =
            myPropertyArray[i, j] <- value

try
    let myType = typeof<MyPropertyClass>
    let myTypeArray = Array.zeroCreate<Type> 2
    // Create an instance of the Type array representing the number, order
    // and type of the parameters for the property.
    myTypeArray.SetValue(typeof<int>, 0)
    myTypeArray.SetValue(typeof<int>, 1)
    // Search for the indexed property whose parameters match the
    // specified argument types and modifiers.
    let myPropertyInfo = myType.GetProperty("Item", typeof<int>, myTypeArray, null)
    printfn $"{myType.FullName}.{myPropertyInfo.Name} has a property type of {myPropertyInfo.PropertyType}"
with ex ->
    printfn $"An exception occurred {ex.Message}"

Imports System.Reflection

Public Class MyPropertyClass
    Private myPropertyArray(9, 9) As Integer
    ' Declare an indexer.
    Default Public Property Item(ByVal i As Integer, ByVal j As Integer) As Integer
        Get
            Return myPropertyArray(i, j)
        End Get
        Set(ByVal Value As Integer)
            myPropertyArray(i, j) = Value
        End Set
    End Property
End Class

Public Class MyTypeClass21
    Public Shared Sub Run()
        Try
            Dim myType As Type = GetType(MyPropertyClass)
            Dim myTypeArray(1) As Type
            ' Create an instance of a Type array representing the number, order 
            ' and type of the parameters for the property.
            myTypeArray.SetValue(GetType(Integer), 0)
            myTypeArray.SetValue(GetType(Integer), 1)
            ' Search for the indexed property whose parameters match the
            ' specified argument types and modifiers.
            Dim myPropertyInfo As PropertyInfo = myType.GetProperty("Item",
                  GetType(Integer), myTypeArray, Nothing)
            Console.WriteLine(myType.FullName + "." + myPropertyInfo.Name +
                  " has a property  type of " + myPropertyInfo.PropertyType.ToString())
        Catch ex As Exception
            Console.WriteLine("An exception occurred " + ex.Message.ToString())
        End Try
    End Sub
End Class

Commenti

Una proprietà viene considerata pubblica ai fini della riflessione se ha almeno un accessore pubblico. In caso contrario, la proprietà è considerata privata ed è necessario usare BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static (in Visual Basic combinare i valori usando Or) per ottenerla.

Anche se il binder predefinito non elabora ParameterModifier (il parametro modifiers), è possibile usare la classe astratta System.Reflection.Binder per scrivere un binder personalizzato che esegue l'elaborazione di modifiers. ParameterModifier viene utilizzato solo quando si esegue la chiamata tramite interoperabilità COM e vengono gestiti solo i parametri passati per riferimento.

La ricerca name fa distinzione tra maiuscole e minuscole. La ricerca include le proprietà pubbliche statiche e di istanza.

Se l'oggetto corrente Type rappresenta un tipo generico costruito, questo metodo restituisce PropertyInfo con i parametri di tipo sostituiti dagli argomenti di tipo appropriati.

Se l'oggetto corrente Type rappresenta un parametro di tipo nella definizione di un tipo generico o di un metodo generico, questo metodo cerca le proprietà del vincolo di classe.

Vedi anche

• PropertyInfo
• String
• DefaultBinder
• ParameterModifier
• GetPropertyImpl(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])
• GetProperties(BindingFlags)