Exception.HResult 属性
获取或设置 HRESULT，它是分配给特定异常的编码数值。
**命名空间:**System
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
Protected Property HResult As Integer
用法
Dim value As Integer
value = Me.HResult
Me.HResult = value
protected int HResult { get; set; }
protected:
property int HResult {
int get ();
void set (int value);
}
/** @property */
protected int get_HResult ()
/** @property */
protected void set_HResult (int value)
protected function get HResult () : int
protected function set HResult (value : int)
属性值
HRESULT 值。
备注
HRESULT 是 32 位值，分为三个不同的域：严重性代码、功能代码和错误代码。严重性代码指示返回值是表示信息、警告还是错误。功能代码标识负责该错误的系统区域。错误代码是所分配的、表示异常的唯一编号。每个异常都映射到一个不同的 HRESULT。当托管代码引发异常时，运行库将 HRESULT 传递给 COM 客户端。当非托管代码返回错误时，相应的 HRESULT 被转换为异常，然后由运行库引发该异常。
示例
下面的代码示例定义一个在其构造函数中设置了 HResult 属性的 Exception 派生类。
' Example for the Exception.HResult property.
Imports System
Imports Microsoft.VisualBasic
Namespace NDP_UE_VB
' Create the derived exception class.
Class SecondLevelException
Inherits Exception
Private Const SecondLevelHResult As Integer = &H81234567
' Set HResult for this exception, and include it in
' the exception message.
Public Sub New(message As String, inner As Exception)
MyBase.New( String.Format( "(HRESULT:0x{1:X8}) {0}", _
message, SecondLevelHResult ), inner )
HResult = SecondLevelHResult
End Sub ' New
End Class ' SecondLevelException
Module HResultDemo
Sub Main()
Console.WriteLine( _
"This example of Exception.HResult " & _
"generates the following output." & vbCrLf )
' This function forces a division by 0 and throws
' a second exception.
Try
Try
Dim zero As Integer = 0
Dim ecks As Integer = 1 \ zero
Catch ex As Exception
Throw New SecondLevelException( _
"Forced a division by 0 and threw " & _
"a second exception.", ex )
End Try
Catch ex As Exception
Console.WriteLine( ex.ToString( ) )
End Try
End Sub ' Main
End Module ' HResultDemo
End Namespace ' NDP_UE_VB
' This example of Exception.HResult generates the following output.
'
' NDP_UE_VB.SecondLevelException: (HRESULT:0x81234567) Forced a division by 0 a
' nd threw a second exception. ---> System.DivideByZeroException: Attempted to
' divide by zero.
' at NDP_UE_VB.HResultDemo.Main()
' --- End of inner exception stack trace ---
' at NDP_UE_VB.HResultDemo.Main()
// Example for the Exception.HResult property.
using System;
namespace NDP_UE_CS
{
// Create the derived exception class.
class SecondLevelException : Exception
{
const int SecondLevelHResult = unchecked( (int)0x81234567 );
// Set HResult for this exception, and include it in
// the exception message.
public SecondLevelException( string message, Exception inner ) :
base( string.Format( "(HRESULT:0x{1:X8}) {0}",
message, SecondLevelHResult ), inner )
{
HResult = SecondLevelHResult;
}
}
class HResultDemo
{
public static void Main()
{
Console.WriteLine(
"This example of Exception.HResult " +
"generates the following output.\n" );
// This function forces a division by 0 and throws
// a second exception.
try
{
try
{
int zero = 0;
int ecks = 1 / zero;
}
catch( Exception ex )
{
throw new SecondLevelException(
"Forced a division by 0 and threw " +
"a second exception.", ex );
}
}
catch( Exception ex )
{
Console.WriteLine( ex.ToString( ) );
}
}
}
}
/*
This example of Exception.HResult generates the following output.
NDP_UE_CS.SecondLevelException: (HRESULT:0x81234567) Forced a division by 0 and
threw a second exception. ---> System.DivideByZeroException: Attempted to divi
de by zero.
at NDP_UE_CS.HResultDemo.Main()
--- End of inner exception stack trace ---
at NDP_UE_CS.HResultDemo.Main()
*/
// Example for the Exception::HResult property.
using namespace System;
namespace NDP_UE_CPP
{
// Create the derived exception class.
ref class SecondLevelException: public Exception
{
private:
static int SecondLevelHResult = (int)0x81234567;
public:
// Set HResult for this exception, and include it in
// the exception message.
SecondLevelException( String^ message, Exception^ inner )
: Exception( String::Format( "(HRESULT:0x{1:X8}) {0}", message, SecondLevelHResult ), inner )
{
HResult = SecondLevelHResult;
}
};
// This function forces a division by 0 and throws
// a second exception.
void DivideBy0()
{
try
{
try
{
int zero = 0;
int ecks = 1 / zero;
}
catch ( Exception^ ex )
{
throw gcnew SecondLevelException( "Forced a division by 0 and threw "
"a second exception.",ex );
}
}
catch ( Exception^ ex )
{
Console::WriteLine( ex->ToString() );
}
}
}
int main()
{
Console::WriteLine( "This example of Exception::HResult "
"generates the following output.\n" );
NDP_UE_CPP::DivideBy0();
}
/*
This example of Exception::HResult generates the following output.
NDP_UE_CPP.SecondLevelException: (HRESULT:0x81234567) Forced a division by 0 an
d threw a second exception. ---> System.DivideByZeroException: Attempted to div
ide by zero.
at NDP_UE_CPP.DivideBy0()
--- End of inner exception stack trace ---
at NDP_UE_CPP.DivideBy0()
*/
// Example for the Exception.HResult property.
package NDP_UE_JSL ;
import System.* ;
// Create the derived exception class.
class SecondLevelException extends System.Exception
{
private int SecondLevelHResult = (int)(0x81234567);
// Set HResult for this exception, and include it in
// the exception message.
public SecondLevelException(String message, System.Exception inner)
{
super(String.Format("(HRESULT:0x{1:X8}) {0}", message,
((System.Int32)(int)(0x81234567)).ToString("X8")), inner);
set_HResult(SecondLevelHResult);
} //SecondLevelException
} //SecondLevelException
class HResultDemo
{
public static void main(String[] args)
{
Console.WriteLine(("This example of Exception.HResult "
+ "generates the following output.\n"));
// This function forces a division by 0 and throws
// a second exception.
try {
try {
int zero = 0;
int ecks = 1 / zero;
}
catch (System.Exception ex) {
throw new SecondLevelException("Forced a division by 0 and "
+ "threw a second exception.", ex);
}
}
catch (System.Exception ex) {
Console.WriteLine(ex.toString());
}
} //main
} //HResultDemo
/*
This example of Exception.HResult generates the following output.
NDP_UE_JSL.SecondLevelException: (HRESULT:0x81234567) Forced a division by 0
and threw a second exception. ---> System.DivideByZeroException: Attempted to
divi de by zero.
at NDP_UE_JSL.HResultDemo.Main()
--- End of inner exception stack trace ---
at NDP_UE_JSL.HResultDemo.Main()
*/
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
.NET Compact Framework
受以下版本支持：2.0