用VB.NET逐行读取文件

Question

以下代码用于逐行读取文件.

它只是一个非常早期的版本,所以我想做的就是在即时窗口中显示字符串.它的工作正常,除了诸如ÄÖÖèà等字符被带有问号的黑色方块所取代.根据文档,文件阅读器应该与UTF-8字符兼容,所以我不知道有什么问题.

...

    Dim reader = File.OpenText(filetoimport.Text)

    Dim line As String = Nothing

    Dim lines As Integer = 0

    While (reader.Peek() <> -1)
        line = reader.ReadLine()
        If line.StartsWith("<item key=""") Then
            Dim Firstpart As String = Nothing

            Firstpart = line.Substring(11, line.IndexOf(""" value=") - 11)

            Debug.WriteLine(Firstpart)

            lines = lines + 1

            Label3.Text = lines
            Application.DoEvents()
        Else
            Label3.Text = lines
            Application.DoEvents()
        End If

    End While

...

该文件是ANSI编码的,不是UTF-8,但读者使用UTF-8.

Answer 1

像这样......我用它来读汉字......

Dim reader as StreamReader = My.Computer.FileSystem.OpenTextFileReader(filetoimport.Text)
Dim a as String

Do
   a = reader.ReadLine
   '
   ' Code here
   '
Loop Until a Is Nothing

reader.Close()

Answer 2

Replaced the reader declaration with this one and now it works!

Dim reader As New StreamReader(filetoimport.Text, Encoding.Default)

Encoding.Default represents the ANSI code page that is set under Windows Control Panel.