我想从一个文件中读取,如果我失败了,让用户重试或以其他方式放弃.到目前为止代码看起来像这样：
- Read_Again:
- Try
- my_stream.Read(buffer,read_len)
- Catch ex As System.IO.IOException
- If MessageBox.Show("try again?") = DialogResult.Retry Then
- GoTo Read_Again
- Else
- Application.Exit() 'just abort,doesn't matter
- End If
- End Try
我不喜欢Goto,这很难看.但我不知道如何制作一个跨越try和catch的循环.
有没有更好的方法来写这个？
- Dim retry as Boolean = True
- While retry
- Try
- my_stream.Read(buffer,read_len)
- retry = False
- Catch ex As System.IO.IOException
- If MessageBox.Show("try again?") = DialogResult.Retry Then
- retry = True
- Else
- retry = False
- Application.Exit() 'just abort,doesn't matter
- End If
- End Try
- End While