Powershell里面一般处理异常分为中断类型和不可中断类型。前者一般是通过try..catch..finally处理,后者一般通过ErrorAction, ErrorVariable处理。
通过try..catch处理的时候有一个问题就是catch后面跟的异常,他的名字到底怎么获取的?
比如说我执行,他会报错,因为 nnnnn这个命令不存在。
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PS C:\> a=nnnnn a=nnnnn : The term 'a=nnnnn' is not recognized as the name of a cmdlet, function , script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1 + a=nnnnn + ~~~~~~~ + CategoryInfo : ObjectNotFound: (a=nnnnn:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
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如果我想使用try ..catch捕获这个异常,如何知道这个异常的具体名字是什么?
可以通过$error这个变量来获取,最新的报错就是 $error[0], 通过他可以知道具体的Exception是什么,这样就可以有的放矢了。
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PS C:\> $Error [0] | fl * -f
PSMessageDetails : Exception : System.Management.Automation.CommandNotFoundException: The term 'a=nnnnn' is not recognized as the name of a cmdlet, function , script file, or operable program. Check the spelling of the name, or if a
path was included, verify that the path is correct and try again.
at System.Management.Automation.CommandDiscovery.LookupCommandInfo(String commandName, CommandTypes commandTypes, SearchResolutionOptions searchResolutionOptions, CommandOrigin commandOrigin,
ExecutionContext context)
at System.Management.Automation.CommandDiscovery.LookupCommandProcessor(String commandName, CommandOrigin commandOrigin, Nullable`1 useLocalScope)
at System.Management.Automation.ExecutionContext.CreateCommand(String command, Boolean dotSource)
at System.Management.Automation.PipelineOps.AddCommand(PipelineProcessor pipe, CommandParameterInternal[] commandElements, CommandBaseAst commandBaseAst, CommandRedirection[] redirections,
ExecutionContext context)
at System.Management.Automation.PipelineOps.InvokePipeline(Object input, Boolean ignoreInput, CommandParameterInternal[][] pipeElements, CommandBaseAst[] pipeElementAsts, CommandRedirection[][]
commandRedirections, FunctionContext funcContext)
at System.Management.Automation.Interpreter.ActionCallInstruction`6.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
TargetObject : a=nnnnn CategoryInfo : ObjectNotFound: (a=nnnnn:String) [], CommandNotFoundException FullyQualifiedErrorId : CommandNotFoundException ErrorDetails : InvocationInfo : System.Management.Automation.InvocationInfo ScriptStackTrace : at <ScriptBlock>, <No file>: line 1 PipelineIterationInfo : {} |
比如这样就行了
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PS C:\> try{ a=nnnnn }catch [System.Management.Automation.CommandNotFoundException] {
"error1" } error1
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本文转自 beanxyz 51CTO博客,原文链接:http://blog.51cto.com/beanxyz/1843821,如需转载请自行联系原作者