AmbiguousMatchException 构造函数

定义

命名空间:

System.Reflection

程序集:

System.Runtime.dll

初始化 AmbiguousMatchException 类的新实例。

重载

AmbiguousMatchException()	通过使用空消息字符串和将根源异常设置为 null 来初始化 AmbiguousMatchException 类的新实例。
AmbiguousMatchException(String)	初始化 AmbiguousMatchException 类的一个新实例，将其消息字符串设置为给定消息，将根源异常设置为 null。
AmbiguousMatchException(String, Exception)	使用指定的错误消息和对作为此异常原因的内部异常的引用来初始化 AmbiguousMatchException 类的新实例。

AmbiguousMatchException()

Source:

AmbiguousMatchException.cs

通过使用空消息字符串和将根源异常设置为 null 来初始化 AmbiguousMatchException 类的新实例。

public:
 AmbiguousMatchException();

public AmbiguousMatchException ();

Public Sub New ()

注解

AmbiguousMatchException 从 Exception 继承。 此构造函数设置 对象的属性 Exception ，如下表所示。

properties	Value
InnerException	null
Message	空字符串 (“”) 。

另请参阅

• Exception
• SystemException

AmbiguousMatchException(String)

Source:

AmbiguousMatchException.cs

初始化 AmbiguousMatchException 类的一个新实例，将其消息字符串设置为给定消息，将根源异常设置为 null。

public:
 AmbiguousMatchException(System::String ^ message);

public AmbiguousMatchException (string? message);

new System.Reflection.AmbiguousMatchException : string -> System.Reflection.AmbiguousMatchException

Public Sub New (message As String)

参数

message

String

指示此异常的引发原因的字符串。

注解

AmbiguousMatchException 从 Exception 继承。 此构造函数设置 对象的属性 Exception ，如下表所示。

properties	Value
InnerException	null
Message	字符串 message 。

AmbiguousMatchException(String, Exception)

Source:

AmbiguousMatchException.cs

使用指定的错误消息和对作为此异常原因的内部异常的引用来初始化 AmbiguousMatchException 类的新实例。

public:
 AmbiguousMatchException(System::String ^ message, Exception ^ inner);

public AmbiguousMatchException (string? message, Exception? inner);

new System.Reflection.AmbiguousMatchException : string * Exception -> System.Reflection.AmbiguousMatchException

Public Sub New (message As String, inner As Exception)

参数

message

String

解释异常原因的错误消息。

inner

Exception

导致当前异常的异常。 如果 inner 参数不为 null，则当前异常将在处理内部异常的 catch 块中引发。

示例

以下示例显示了两种方法，每个方法都名为 Mymethod。 一种方法采用整数，另一种方法采用字符串。 如果将整数传递给 Mymethod，则使用第一种方法。 如果传递字符串，则使用第二种方法。 如果无法确定要使用哪个 Mymethod ， AmbiguousMatchException 则引发 。

using namespace System;
using namespace System::Reflection;

namespace Ambiguity
{
    ref class Myambiguous
    {
    public:

        //The first overload is typed to an Int32
        static void Mymethod(Int32 number)
        {
            Console::WriteLine("I am from 'Int32' method");
        }

        //The second overload is typed to a String^
        static void Mymethod(String^ alpha)
        {
            Console::WriteLine("I am from 'String^' method.");
        }

        static void Main()
        {
            try
            {
                //The following does not cause as exception
                Mymethod(2);    // goes to Mymethod (Int32)
                Mymethod("3");  // goes to Mymethod (String*)
                Type^ Mytype = Type::GetType("Ambiguity.Myambiguous");
                array<Type^>^temp0 = {Int32::typeid};
                MethodInfo^ Mymethodinfo32 = Mytype->GetMethod("Mymethod", temp0);
                array<Type^>^temp1 = {System::String::typeid};
                MethodInfo^ Mymethodinfostr = Mytype->GetMethod("Mymethod", temp1);

                //Invoke a method, utilizing a Int32 integer
                array<Object^>^temp2 = {2};
                Mymethodinfo32->Invoke(nullptr, temp2);

                //Invoke the method utilizing a String^
                array<Object^>^temp3 = {"1"};
                Mymethodinfostr->Invoke(nullptr, temp3);

                //The following line causes an ambiguous exception
                MethodInfo^ Mymethodinfo = Mytype->GetMethod("Mymethod");
            }
            catch (AmbiguousMatchException^ ex)
            {
                Console::WriteLine("\n{0}\n{1}", ex->GetType()->FullName, ex->Message);
            }
            catch (...)
            {
                Console::WriteLine("\nSome other exception.");
            }

            return;
        }
    };
}

int main()
{
    Ambiguity::Myambiguous::Main();
}

//This code produces the following output:
//
// I am from 'Int32' method
// I am from 'String^' method.
// I am from 'Int32' method
// I am from 'String^' method.
//
// System.Reflection.AmbiguousMatchException
// Ambiguous match found.

using System;
using System.Reflection;

namespace Ambiguity
{
    class Myambiguous
    {
        //The first overload is typed to an int
        public static void Mymethod(int number)
        {
           Console.WriteLine("I am from 'int' method");
        }

        //The second overload is typed to a string
        public static void Mymethod(string alpha)
        {
            Console.WriteLine("I am from 'string' method.");
        }

        public static void Main()
        {
            try
            {
                //The following does not cause as exception
                Mymethod(2);    // goes to Mymethod(int)
                Mymethod("3");  // goes to Mymethod(string)

                Type Mytype = Type.GetType("Ambiguity.Myambiguous");

                MethodInfo Mymethodinfo32 = Mytype.GetMethod("Mymethod", new Type[]{typeof(int)});
                MethodInfo Mymethodinfostr = Mytype.GetMethod("Mymethod", new Type[]{typeof(System.String)});

                //Invoke a method, utilizing a int integer
                Mymethodinfo32.Invoke(null, new Object[]{2});

                //Invoke the method utilizing a string
                Mymethodinfostr.Invoke(null, new Object[]{"1"});

                //The following line causes an ambiguious exception
                MethodInfo Mymethodinfo = Mytype.GetMethod("Mymethod");
            }   // end of try block
            catch (AmbiguousMatchException ex)
            {
                Console.WriteLine("\n{0}\n{1}", ex.GetType().FullName, ex.Message);
            }
            catch
            {
                Console.WriteLine("\nSome other exception.");
            }
            return;
        }
    }
}

//This code produces the following output:
//
// I am from 'int' method
// I am from 'string' method.
// I am from 'int' method
// I am from 'string' method.

// System.Reflection.AmbiguousMatchException
// Ambiguous match found.

Imports System.Reflection

Namespace Ambiguity
    Class Myambiguous

        'The first overload is typed to an Int32
        Overloads Public Shared Sub Mymethod(number As Int32)
            Console.WriteLine("I am from 'Int32' method")
        End Sub

        'The second overload is typed to a string
        Overloads Public Shared Sub Mymethod(alpha As String)
            Console.WriteLine("I am from 'string' method.")
        End Sub

        Public Shared Sub Main()
            Try
                'The following does not cause as exception
                Mymethod(2) ' goes to Mymethod Int32)
                Mymethod("3") ' goes to Mymethod(string)
                Dim Mytype As Type = Type.GetType("Ambiguity.Myambiguous")

                Dim Mymethodinfo32 As MethodInfo = Mytype.GetMethod("Mymethod", New Type() {GetType(Int32)})
                Dim Mymethodinfostr As MethodInfo = Mytype.GetMethod("Mymethod", New Type() {GetType(System.String)})

                'Invoke a method, utilizing a Int32 integer
                Mymethodinfo32.Invoke(Nothing, New Object() {2})

                'Invoke the method utilizing a string
                Mymethodinfostr.Invoke(Nothing, New Object() {"1"})

                'The following line causes an ambiguious exception
                Dim Mymethodinfo As MethodInfo = Mytype.GetMethod("Mymethod")
                ' end of try block
            Catch ex As AmbiguousMatchException
                Console.WriteLine(Environment.NewLine + "{0}" + Environment.NewLine + "{1}", ex.GetType().FullName, ex.Message)
            Catch
                Console.WriteLine(Environment.NewLine + "Some other exception.")
            End Try
            Return
        End Sub
    End Class
End Namespace
' This code produces the following output:
'
' I am from 'Int32' method
' I am from 'string' method.
' I am from 'Int32' method
' I am from 'string' method.
'
' System.Reflection.AmbiguousMatchException
' Ambiguous match found.

注解

因前一个异常而直接引发的异常应在 InnerException 属性中包含对前一个异常的引用。 InnerException 属性将返回传递给构造函数的同一值；如果 InnerException 属性不向构造函数提供内部异常值，则返回 null。

下表显示了 AmbiguousMatchException 实例的初始属性值。

properties	“值”
InnerException	内部异常引用。
Message	错误消息字符串。

另请参阅

• Exception
• 在 .NET 中处理和引发异常