输出行号

Question

在VB.NET中,有没有办法在源代码中输出当前行号？例如:

Try
    ' The following line will purposly cause an error
    Dim BigNum As Int64
    Dim LittleNum As Int16 = CShort(BigNum)
Catch ex As Exception
    Dim LineNumber As Integer = <linenumber> ' How do I do this?
    MessageBox.Show("Error in source code. Line: " + LineNumber)
End Try

有没有办法用上面的例子中的LineNumber变量填充导致错误的源代码中的实际行号？

Answer 1

这应该做的工作:

Dim stackTrace = New System.Diagnostics.StackTrace(ex)
Dim stackFrame = stackTrace.GetFrame(stackTrace.FrameCount - 1)
Dim lineNumber = stackFrame.GetFileLineNumber()

请注意,GetFrame(stackTrace.FrameCount - 1))将第一帧推入堆栈.在这种情况下,这是包含当前try-catch块的框架,这是您想要的.有关详细信息,请参阅MSDN文档.)