# OverflowException 类

## 定义

``public ref class OverflowException : ArithmeticException``
``````[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class OverflowException : ArithmeticException``````
``````type OverflowException = class
inherit ArithmeticException``````
``````Public Class OverflowException
Inherits ArithmeticException``````

## 注解

• 算术运算生成的结果超出了该操作所返回的数据类型的范围。An arithmetic operation produces a result that is outside the range of the data type returned by the operation. 下面的示例演示溢出 Int32 类型边界的乘法运算所引发的 OverflowExceptionThe following example illustrates the OverflowException that is thrown by a multiplication operation that overflows the bounds of the Int32 type.

``````int value = 780000000;
checked {
try {
// Square the original value.
int square = value * value;
Console.WriteLine("{0} ^ 2 = {1}", value, square);
}
catch (OverflowException) {
double square = Math.Pow(value, 2);
Console.WriteLine("Exception: {0} > {1:E}.",
square, Int32.MaxValue);
} }
// The example displays the following output:
//       Exception: 6.084E+17 > 2.147484E+009.
``````
``````Dim value As Integer = 780000000
Try
' Square the original value.
Dim square As Integer = value * value
Console.WriteLine("{0} ^ 2 = {1}", value, square)
Catch e As OverflowException
Dim square As Double = Math.Pow(value, 2)
Console.WriteLine("Exception: {0} > {1:E}.", _
square, Int32.MaxValue)
End Try
' The example displays the following output:
'       Exception: 6.084E+17 > 2.147484E+009.
``````
• 强制转换或转换操作尝试执行收缩转换，并且源数据类型的值超出了目标数据类型的范围。A casting or conversion operation attempts to perform a narrowing conversion, and the value of the source data type is outside the range of the target data type. 下面的示例演示尝试将大的无符号字节值转换为有符号字节值时所引发的 OverflowExceptionThe following example illustrates the OverflowException that is thrown by the attempt to convert a large unsigned byte value to a signed byte value.

``````byte value = 241;
checked {
try {
sbyte newValue = (sbyte) value;
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
value.GetType().Name, value,
newValue.GetType().Name, newValue);
}
catch (OverflowException) {
Console.WriteLine("Exception: {0} > {1}.", value, SByte.MaxValue);
} }
// The example displays the following output:
//       Exception: 241 > 127.
``````
``````Dim value As Byte = 241
Try
Dim newValue As SByte = (CSByte(value))
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
value.GetType().Name, value, _
newValue.GetType().Name, newValue)
Catch e As OverflowException
Console.WriteLine("Exception: {0} > {1}.", value, SByte.MaxValue)
End Try
' The example displays the following output:
'       Exception: 241 > 127.
``````

``````byte value = 241;
try {
sbyte newValue = (sbyte) value;
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
value.GetType().Name, value,
newValue.GetType().Name, newValue);
}
catch (OverflowException) {
Console.WriteLine("Exception: {0} > {1}.", value, SByte.MaxValue);
}
// The example displays the following output:
//       Converted the Byte value 241 to the SByte value -15.
``````

• 签名 > `add.ovf.`<`add.ovf.` <signed>

• `conv.ovf.` <类型 >`conv.ovf.` <to type>

• `conv.ovf.` <类型 > `.un``conv.ovf.` <to type> `.un`

• <类型 `mul.ovf.` >`mul.ovf.` <type>

• <类型 `sub.ovf.` >`sub.ovf.` <type>

• `newarr`

OverflowException 使用值为0x80131516 的 HRESULT COR_E_OVERFLOW。OverflowException uses the HRESULT COR_E_OVERFLOW, which has the value 0x80131516.

## 构造函数

 初始化 OverflowException 类的新实例。Initializes a new instance of the OverflowException class. 使用序列化数据初始化 OverflowException 类的新实例。Initializes a new instance of the OverflowException class with serialized data. 用指定的错误消息初始化 OverflowException 类的新实例。Initializes a new instance of the OverflowException class with a specified error message. 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 OverflowException 类的新实例。Initializes a new instance of the OverflowException class with a specified error message and a reference to the inner exception that is the cause of this exception.

## 属性

 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) 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) 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) 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) 获取描述当前异常的消息。Gets a message that describes the current exception. (继承自 Exception) 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) 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) 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

 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) 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) 用作默认哈希函数。Serves as the default hash function. (继承自 Object) 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) 获取当前实例的运行时类型。Gets the runtime type of the current instance. (继承自 Exception) 创建当前 Object 的浅表副本。Creates a shallow copy of the current Object. (继承自 Object) 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

 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)