KeyNotFoundException 类
定义
当指定用于访问集合中元素的键与集合中的任意键均不匹配时所引发的异常。The exception that is thrown when the key specified for accessing an element in a collection does not match any key in the collection.
public ref class KeyNotFoundException : SystemException[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class KeyNotFoundException : SystemExceptiontype KeyNotFoundException = class
inherit SystemException
interface ISerializablePublic Class KeyNotFoundException
Inherits SystemException- 继承
- 属性
- 实现
注解
当某个操作尝试使用集合中不存在的键从集合中检索元素时，将引发 KeyNotFoundException。A KeyNotFoundException is thrown when an operation attempts to retrieve an element from a collection using a key that does not exist in that collection.
KeyNotFoundException 使用值为0x80131577 的 HRESULT COR_E_KEYNOTFOUND。KeyNotFoundException uses the HRESULT COR_E_KEYNOTFOUND, which has the value 0x80131577.
有关 KeyNotFoundException 类的实例的初始属性值的列表，请参阅 KeyNotFoundException 构造函数。For a list of initial property values for an instance of the KeyNotFoundException class, see the KeyNotFoundException constructors.
构造函数
| KeyNotFoundException() |
使用默认属性值初始化 KeyNotFoundException 类的新实例。Initializes a new instance of the KeyNotFoundException class using default property values. |
| KeyNotFoundException(SerializationInfo, StreamingContext) |
使用序列化数据初始化 KeyNotFoundException 类的新实例。Initializes a new instance of the KeyNotFoundException class with serialized data. |
| KeyNotFoundException(String) |
使用指定的错误消息初始化 KeyNotFoundException 类的新实例。Initializes a new instance of the KeyNotFoundException class with the specified error message. |
| KeyNotFoundException(String, Exception) |
使用指定的错误消息和对导致此异常的内部异常的引用来初始化 KeyNotFoundException 类的新实例。Initializes a new instance of the KeyNotFoundException class with the specified error message and a reference to the inner exception that is the cause of this exception. |
属性
| Data |
获取键/值对的集合，这些键/值对提供有关该异常的其他用户定义信息。Gets a collection of key/value pairs that provide additional user-defined information about the exception. (继承自 Exception) |
| HelpLink |
获取或设置指向与此异常关联的帮助文件链接。Gets or sets a link to the help file associated with this exception. (继承自 Exception) |
| HResult |
获取或设置 HRESULT（一个分配给特定异常的编码数字值）。Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (继承自 Exception) |
| InnerException |
获取导致当前异常的 Exception 实例。Gets the Exception instance that caused the current exception. (继承自 Exception) |
| Message |
获取描述当前异常的消息。Gets a message that describes the current exception. (继承自 Exception) |
| Source |
获取或设置导致错误的应用程序或对象的名称。Gets or sets the name of the application or the object that causes the error. (继承自 Exception) |
| StackTrace |
获取调用堆栈上的即时框架字符串表示形式。Gets a string representation of the immediate frames on the call stack. (继承自 Exception) |
| TargetSite |
获取引发当前异常的方法。Gets the method that throws the current exception. (继承自 Exception) |
方法
| Equals(Object) |
确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object. (继承自 Object) |
| GetBaseException() |
当在派生类中重写时，返回 Exception，它是一个或多个并发的异常的根本原因。When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (继承自 Exception) |
| GetHashCode() |
用作默认哈希函数。Serves as the default hash function. (继承自 Object) |
| GetObjectData(SerializationInfo, StreamingContext) |
当在派生类中重写时，用关于异常的信息设置 SerializationInfo。When overridden in a derived class, sets the SerializationInfo with information about the exception. (继承自 Exception) |
| GetType() |
获取当前实例的运行时类型。Gets the runtime type of the current instance. (继承自 Exception) |
| MemberwiseClone() |
创建当前 Object 的浅表副本。Creates a shallow copy of the current Object. (继承自 Object) |
| ToString() |
创建并返回当前异常的字符串表示形式。Creates and returns a string representation of the current exception. (继承自 Exception) |
事件
| SerializeObjectState |
当异常被序列化用来创建包含有关该异常的徐列出数据的异常状态对象时会出现该问题。Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception. (继承自 Exception) |