本文整理汇总了VB.NET中System.Reflection.MethodBody.ExceptionHandlingClauses属性的典型用法代码示例。如果您正苦于以下问题:VB.NET MethodBody.ExceptionHandlingClauses属性的具体用法?VB.NET MethodBody.ExceptionHandlingClauses怎么用?VB.NET MethodBody.ExceptionHandlingClauses使用的例子?那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类System.Reflection.MethodBody
的用法示例。
在下文中一共展示了MethodBody.ExceptionHandlingClauses属性的4个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: Main
' 导入命名空间
Imports System.Reflection
Public Class Example
Public Shared Sub Main()
' Demonstrate the effect of the Visual Basic When keyword, which
' generates a Filter clause in the Try block.
Dim e As New Example()
Console.WriteLine()
e.MethodBodyExample("String argument")
e.MethodBodyExample(Nothing)
' Get method body information.
Dim mi As MethodInfo = _
GetType(Example).GetMethod("MethodBodyExample")
Dim mb As MethodBody = mi.GetMethodBody()
Console.WriteLine(vbCrLf & "Method: {0}", mi)
' Display the general information included in the
' MethodBody object.
Console.WriteLine(" Local variables are initialized: {0}", _
mb.InitLocals)
Console.WriteLine(" Maximum number of items on the operand stack: {0}", _
mb.MaxStackSize)
示例2:
' Display exception handling clauses.
Console.WriteLine()
For Each ehc As ExceptionHandlingClause In mb.ExceptionHandlingClauses
Console.WriteLine(ehc.Flags.ToString())
' The FilterOffset property is meaningful only for Filter
' clauses. The CatchType property is not meaningful for
' Filter or Finally clauses.
Select Case ehc.Flags
Case ExceptionHandlingClauseOptions.Filter
Console.WriteLine(" Filter Offset: {0}", _
ehc.FilterOffset)
Case ExceptionHandlingClauseOptions.Finally
Case Else
Console.WriteLine(" Type of exception: {0}", _
ehc.CatchType)
End Select
Console.WriteLine(" Handler Length: {0}", ehc.HandlerLength)
Console.WriteLine(" Handler Offset: {0}", ehc.HandlerOffset)
Console.WriteLine(" Try Block Length: {0}", ehc.TryLength)
Console.WriteLine(" Try Block Offset: {0}", ehc.TryOffset)
Next
示例3: MethodBodyExample
End Sub
' This test method is executed at the beginning of Main, to show
' how the Filter clause works. The Filter clause is generated by
' a Visual Basic When expression. If arg is Nothing, this method
' throws ArgumentNullException, which is caught by the filter
' clause. If arg is a string, the method throws ArgumentException,
' which does not match the filter clause.
'
' Sub Main also contains code to analyze this method, using
' the properties and methods of the MethodBody class.
Public Sub MethodBodyExample(ByVal arg As Object)
' Define some local variables. In addition to these variables,
' the local variable list includes the variables scoped to
' the catch clauses.
Dim var1 As Integer = 42
Dim var2 As String = "Forty-two"
Try
' Depending on the input value, throw an ArgumentException or
' an ArgumentNullException to test the Catch clauses.
'
If arg Is Nothing Then
Throw New ArgumentNullException("The argument cannot be Nothing.")
End If
If arg.GetType() Is GetType(String) Then
Throw New ArgumentException("The argument cannot be a string.")
End If
' The When expression makes this a filter clause. The expression
' selects only exceptions that derive from the ArgumentException
' class. Other exceptions, including ArgumentException itself,
' are not handled by this filter clause.
Catch ex As ArgumentException _
When ex.GetType().IsSubclassOf(GetType(ArgumentException))
Console.WriteLine("Filter clause caught: {0}", ex.GetType())
' This catch clause handles the ArgumentException class, and
' any other class derived from Exception.
Catch ex As Exception
Console.WriteLine("Ordinary exception-handling clause caught: {0}", _
ex.GetType())
Finally
var1 = 3033
var2 = "Another string."
End Try
End Sub
End Class
输出:
Ordinary exception-handling clause caught: System.ArgumentException Filter clause caught: System.ArgumentNullException Method: Void MethodBodyExample(System.Object) Local variables are initialized: True Maximum number of items on the operand stack: 3
示例4:
'
'Filter
' Filter Offset: 0
' Handler Length: 19
' Handler Offset: 99
' Try Block Length: 45
' Try Block Offset: 9
'Clause
' Type of exception: System.Exception
' Handler Length: 25
' Handler Offset: 118
' Try Block Length: 45
' Try Block Offset: 9
'Finally
' Handler Length: 13
' Handler Offset: 153
' Try Block Length: 144
' Try Block Offset: 9