尝试……抓住…最后在VB.NET中
发布时间:2020-12-17 00:32:20 所属栏目:大数据 来源:网络整理
导读:在VB.NET中,如果从Catch返回一个值,那么Finally代码仍会执行吗? 例如(我已经将这段代码概括了一下): Try response = Client.doRequest()Catch ex As Exception 'Request threw an error - Fatal failure. InsertErrorLog(ex) Return FalseFinally DisposeC
在VB.NET中,如果从Catch返回一个值,那么Finally代码仍会执行吗?
例如(我已经将这段代码概括了一下): Try response = Client.doRequest() Catch ex As Exception 'Request threw an error - Fatal failure. InsertErrorLog(ex) Return False Finally DisposeClient() End Try 我需要确保DisposeClient()始终执行.因为我要退出Catch,最终还是会被执行吗?
最后总是执行块,无论代码是否执行到Catch块.
参见:https://msdn.microsoft.com/en-us/library/fk6t46tz.aspx 尝试使用此代码: Dim Temp As String Private Sub Button1_Click(sender As Object,e As EventArgs) Handles Button1.Click Temp = "A" MessageBox.Show(Test()) MessageBox.Show(Temp) End Sub Private Function Test() As String Try Temp = "B" Throw New Exception() Temp = "C" Return "Try" Catch ex As Exception Temp = "D" Return "Catch" Finally Temp = "E" End Try Temp = "F" Return "End" End Function 它显示消息: Catch 然后 E 这意味着,即使函数在Catch块返回,也始终执行finally块. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |