本文整理匯總了VB.NET中System.Linq.Expressions.Expression.TryCatchFinally方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET Expression.TryCatchFinally方法的具體用法？VB.NET Expression.TryCatchFinally怎麽用？VB.NET Expression.TryCatchFinally使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Linq.Expressions.Expression的用法示例。
在下文中一共展示了Expression.TryCatchFinally方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: DivideByZeroException
' Add the following directive to the file:
' Imports System.Linq.Expressions
' A TryExpression object that has a catch statement and a finally statement.
' The return types of the try block and all catch blocks must be the same.
Dim tryCatchExpr As TryExpression =
Expression.TryCatchFinally(
Expression.Block(
Expression.Throw(Expression.Constant(New DivideByZeroException())),
Expression.Constant("Try block")
),
Expression.Call(
GetType(Console).GetMethod("WriteLine", New Type() {GetType(String)}),
Expression.Constant("Finally block")
),
Expression.Catch(
GetType(DivideByZeroException),
Expression.Constant("Catch block")
)
)
' The following statement first creates an expression tree,
' then compiles it, and then runs it.
' If the exception is caught,
' the result of the TryExpression is the last statement
' of the corresponding catch statement.
Console.WriteLine(Expression.Lambda(Of Func(Of String))(tryCatchExpr).Compile()())輸出：
Finally block Catch block