Type.GetProperty 方法

Source:

Type.cs

Source:

Type.cs

Source:

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);

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);

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

参数

返回

表示符合指定需求的属性的对象（如果找到的话）；否则为 null。

实现

例外

注解

有关此 API 的详细信息，请参阅 Type.GetProperty 的补充 API 备注。

另请参阅

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

Source:

Type.cs

Source:

Type.cs

Source:

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);

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);

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

参数

返回

表示符合指定要求的公共属性的对象（如果找到的话）；否则为 null。

实现

例外

示例

下面的示例获取对应于 TypeMyPropertyClass的 对象，并使用传递给 GetProperty 方法的参数检索此类的索引属性。

using namespace System;
using namespace System::Reflection;
public ref class MyPropertyClass
{
private:
   array<int, 2>^ myPropertyArray;

public:

   property int Item [int, int]
   {
      // Declare an indexer.
      int get( int i, int j )
      {
         return myPropertyArray[ i,j ];
      }

      void set( int i, int j, int value )
      {
         myPropertyArray[ i,j ] = value;
      }

   }

};

int main()
{
   try
   {
      Type^ myType = MyPropertyClass::typeid;
      array<Type^>^myTypeArray = gcnew array<Type^>(2);
      
      // Create an instance of the Type array representing the number, order
      // and type of the parameters for the property.
      myTypeArray->SetValue( int::typeid, 0 );
      myTypeArray->SetValue( int::typeid, 1 );
      
      // Search for the indexed property whose parameters match the
      // specified argument types and modifiers.
      PropertyInfo^ myPropertyInfo = myType->GetProperty( "Item", int::typeid, myTypeArray, nullptr );
      Console::WriteLine( "{0}.{1} has a property type of {2}", myType->FullName, myPropertyInfo->Name, myPropertyInfo->PropertyType );
   }
   catch ( Exception^ ex ) 
   {
      Console::WriteLine( "An exception occurred {0}", ex->Message );
   }

}

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 MyTypeClass
    Public Shared Sub Main()
        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

注解

如果属性至少有一个公共访问器，则它被视为公共的反射。 否则，该属性被视为私有属性，并且必须在 Visual Basic 中使用 BindingFlags.NonPublic | | BindingFlags.InstanceBindingFlags.Static (，使用 Or) 组合这些值来获取它。

尽管默认联编程序不会处理 ParameterModifier (modifiers 参数) ，但可以使用抽象 System.Reflection.Binder 类编写处理 的 modifiers自定义绑定器。 ParameterModifier 仅在通过 COM 互操作调用时才使用 ，并且仅处理由引用传递的参数。

搜索 name 区分大小写。 搜索包括公共静态和公共实例属性。

如果当前 Type 表示构造的泛型类型，则此方法返回 PropertyInfo ，并将类型参数替换为相应的类型参数。

如果当前 Type 表示泛型类型或泛型方法的定义中的类型参数，则此方法将搜索类约束的属性。

另请参阅

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

Source:

Type.cs

Source:

Type.cs

Source:

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);

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

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

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

参数

返回

表示其参数与指定参数类型匹配的公共属性的对象（如果找到的话）；否则为 null。

实现

例外

示例

以下示例检索 Type 用户定义类的 对象，检索该类的 属性，并显示传递给 GetProperty的参数所指定的属性名称和类型。

using namespace System;
using namespace System::Reflection;
ref class MyClass1
{
private:
   array<int, 2>^myArray;

public:

   property int Item [int, int]
   {

      // Declare an indexer.
      int get( int i, int j )
      {
         return myArray[ i,j ];
      }

      void set( int i, int j, int value )
      {
         myArray[ i,j ] = value;
      }

   }

};

int main()
{
   try
   {
      
      // Get the Type object.
      Type^ myType = MyClass1::typeid;
      array<Type^>^myTypeArr = gcnew array<Type^>(2);
      
      // Create an instance of a Type array.
      myTypeArr->SetValue( int::typeid, 0 );
      myTypeArr->SetValue( int::typeid, 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 MyClass1.", myPropInfo );
   }
   catch ( NullReferenceException^ e ) 
   {
      Console::WriteLine( "An exception occurred." );
      Console::WriteLine( "Source : {0}", e->Source );
      Console::WriteLine( "Message : {0}", e->Message );
   }

}

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 Module1
    Class MyClass1
        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 MyTypeClass
        Public Shared Sub Main()
            Try
                ' Get the Type Object.
                Dim myType As Type = GetType(MyClass1)
                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 MyClass1.", 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 'Module1

注解

如果属性至少有一个公共访问器，则它被视为公共的反射。 否则，该属性被视为私有属性，并且必须在 Visual Basic 中使用 BindingFlags.NonPublic | | BindingFlags.InstanceBindingFlags.Static (，使用 Or) 组合这些值来获取它。

搜索 name 区分大小写。 搜索包括公共静态和公共实例属性。

如果当前 Type 表示构造的泛型类型，则此方法返回 PropertyInfo ，并将类型参数替换为相应的类型参数。

如果当前 Type 表示泛型类型或泛型方法的定义中的类型参数，则此方法将搜索类约束的属性。

另请参阅

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

Source:

Type.cs

Source:

Type.cs

Source:

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);

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

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

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

参数

返回

表示其参数与指定参数类型匹配的公共属性的对象（如果找到的话）；否则为 null。

实现

例外

注解

如果属性至少有一个公共访问器，则它被视为公共的反射。 否则，该属性被视为私有属性，并且必须在 Visual Basic 中使用 BindingFlags.NonPublic | | BindingFlags.InstanceBindingFlags.Static (，使用 Or) 组合这些值来获取它。

搜索 name 区分大小写。 搜索包括公共静态和公共实例属性。

如果当前 Type 表示构造的泛型类型，则此方法返回 PropertyInfo ，并将类型参数替换为相应的类型参数。

如果当前 Type 表示泛型类型或泛型方法的定义中的类型参数，则此方法将搜索类约束的属性。

另请参阅

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

Source:

Type.cs

Source:

Type.cs

Source:

Type.cs

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

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

参数

返回

表示符合指定需求的属性的对象（如果找到的话）；否则为 null。

实现

例外

示例

以下示例检索用户定义的类的类型，检索该类的属性，并根据指定的绑定约束显示属性名称。

using namespace System;
using namespace System::Reflection;
ref class MyClass
{
private:
   int myProperty;

public:

   property int MyProperty 
   {
      // Declare MyProperty.
      int get()
      {
         return myProperty;
      }

      void set( int value )
      {
         myProperty = value;
      }
   }
};

int main()
{
   try
   {
      // Get Type object of MyClass.
      Type^ myType = MyClass::typeid;
      
      // Get the PropertyInfo by passing the property name and specifying the BindingFlags.
      PropertyInfo^ myPropInfo = myType->GetProperty( "MyProperty", static_cast<BindingFlags>(BindingFlags::Public | BindingFlags::Instance) );
      
      // Display Name property to console.
      Console::WriteLine( "{0} is a property of MyClass.", myPropInfo->Name );
   }
   catch ( NullReferenceException^ e ) 
   {
      Console::WriteLine( "MyProperty does not exist in MyClass. {0}", e->Message );
   }
}

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
        ' Declare MyProperty.
        Public Property MyProperty() As Integer
            Get
                Return myProperty1
            End Get
            Set(ByVal Value As Integer)
                myProperty1 = Value
            End Set
        End Property
        Public Shared Sub Main()
            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

另请参阅

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

Source:

Type.cs

Source:

Type.cs

Source:

Type.cs

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

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

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

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

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

参数

返回

表示具有指定名称的公共属性的对象（如果找到的话）；否则为 null。

实现

例外

示例

以下示例检索 Type 用户定义类的 对象，检索该类的属性，并显示属性名称。

using namespace System;
using namespace System::Reflection;
ref class MyClass
{
private:
   int myProperty;

public:

   property int MyProperty 
   {
      // Declare MyProperty.
      int get()
      {
         return myProperty;
      }

      void set( int value )
      {
         myProperty = value;
      }
   }
};

int main()
{
   try
   {
      // Get the Type object corresponding to MyClass.
      Type^ myType = MyClass::typeid;
      
      // 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 MyClass.", myPropInfo->Name );
   }
   catch ( NullReferenceException^ e ) 
   {
      Console::WriteLine( "The property does not exist in MyClass. {0}", e->Message );
   }
}

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 Main(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

注解

有关此 API 的详细信息，请参阅 Type.GetProperty 的补充 API 备注。

另请参阅

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

Source:

Type.cs

Source:

Type.cs

Source:

Type.cs

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

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

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

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

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

参数

返回

表示具有指定名称的公共属性的对象（如果找到的话）；否则为 null。

实现

例外

示例

以下示例定义一个具有一个属性的类，并检索该属性的名称和类型。

using namespace System;
using namespace System::Reflection;
ref class MyClass1
{
private:
   String^ myMessage;

public:

   property String^ MyProperty1 
   {
      String^ get()
      {
         return myMessage;
      }

      void set( String^ value )
      {
         myMessage = value;
      }
   }
};

int main()
{
   try
   {
      Type^ myType = MyClass1::typeid;
      
      // Get the PropertyInfo Object* representing MyProperty1.
      PropertyInfo^ myStringProperties1 = myType->GetProperty( "MyProperty1", String::typeid );
      Console::WriteLine( "The name of the first property of MyClass1 is {0}.", myStringProperties1->Name );
      Console::WriteLine( "The type of the first property of MyClass1 is {0}.", myStringProperties1->PropertyType );
   }
   catch ( ArgumentNullException^ e ) 
   {
      Console::WriteLine( "ArgumentNullException : {0}", e->Message );
   }
   catch ( AmbiguousMatchException^ e ) 
   {
      Console::WriteLine( "AmbiguousMatchException : {0}", 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 MyClass1 is MyProperty1.
   //The type of the first property of MyClass1 is System.String.

}

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 MyClass1
    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 Main()
        Try
            Dim myType As Type = GetType(MyClass1)
            ' Get the PropertyInfo object representing MyProperty1. 
            Dim myStringProperties1 As PropertyInfo = myType.GetProperty("MyProperty1", GetType(String))
            Console.WriteLine("The name of the first property of MyClass1 is {0}.", myStringProperties1.Name)
            Console.WriteLine("The type of the first property of MyClass1 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 MyClass1 is MyProperty1.
    'The type of the first property of MyClass1 is System.String.

    End Sub
End Class

注解

如果属性至少有一个公共访问器，则它被视为公共的反射。 否则，该属性被视为私有属性，并且必须在 Visual Basic 中使用 BindingFlags.NonPublic | | BindingFlags.InstanceBindingFlags.Static (，使用 Or) 组合这些值来获取它。

搜索 name 区分大小写。 搜索包括公共静态和公共实例属性。

如果当前 Type 表示构造的泛型类型，则此方法返回 PropertyInfo ，并将类型参数替换为相应的类型参数。

如果当前 Type 表示泛型类型或泛型方法的定义中的类型参数，则此方法将搜索类约束的属性。

另请参阅

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