SqlNullValueException 类

定义

Value 结构的 System.Data.SqlTypes 属性设置为 null 时所引发的异常。The exception that is thrown when the Value property of a System.Data.SqlTypes structure is set to null.

public ref class SqlNullValueException sealed : System::Data::SqlTypes::SqlTypeException
public sealed class SqlNullValueException : System.Data.SqlTypes.SqlTypeException
[System.Serializable]
public sealed class SqlNullValueException : System.Data.SqlTypes.SqlTypeException
type SqlNullValueException = class
    inherit SqlTypeException
[<System.Serializable>]
type SqlNullValueException = class
    inherit SqlTypeException
    interface ISerializable
[<System.Serializable>]
type SqlNullValueException = class
    inherit SqlTypeException
Public NotInheritable Class SqlNullValueException
Inherits SqlTypeException
继承
继承
SqlNullValueException
属性
实现

注解

为了避免引发此异常,应始终检查结构的属性, IsNull 然后再访问 Value 属性。In order to avoid throwing this exception, you should always examine the IsNull property of the structure before accessing the Value property.

构造函数

SqlNullValueException()

使用说明错误的系统提供的消息初始化 SqlNullValueException 类的新实例。Initializes a new instance of the SqlNullValueException class with a system-supplied message that describes the error.

SqlNullValueException(String)

使用说明错误的指定消息初始化 SqlNullValueException 类的新实例。Initializes a new instance of the SqlNullValueException class with a specified message that describes the error.

SqlNullValueException(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 SqlNullValueException 类的新实例。Initializes a new instance of the SqlNullValueException class with a 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()

作为默认哈希函数。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 SerializationInfoWhen 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)

显式接口实现

ISerializable.GetObjectData(SerializationInfo, StreamingContext)

使用将目标对象序列化所需的数据填充 SerializationInfoPopulates a SerializationInfo with the data needed to serialize the target object.

ISerializable.GetObjectData(SerializationInfo, StreamingContext)

使用将目标对象序列化所需的数据填充 SerializationInfoPopulates a SerializationInfo with the data needed to serialize the target object.

(继承自 SqlTypeException)

适用于