Sub ReadFile()
Dim SR As StreamReader
OpenFileDialog1.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*"
If OpenFileDialog1.ShowDialog() = DialogResult.OK Then
mFileName = OpenFileDialog1.FileName
SR = New streamreader(mFileName, System.Text.Encoding.Default)
TextBox1.Text = SR.readtoend
SR.Close()

End If
End Sub
这是个编写读文件处理的过程。但是不知道为什么说“StreamReader” 未定义类型！高手帮我看下

[此贴子已经被作者于2006-5-14 8:55:15编辑过]

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim MusicDir As String
Dim Fileindex As Integer
Dim PlayPos As Integer
If File.Exists(Application.StartupPath & "\Info.txt") Then
Dim fs As New StreamReader(Application.StartupPath & "\Info.txt")
MusicDir = fs.ReadLine
Fileindex = Convert.ToInt32(fs.ReadLine)
PlayPos = Convert.ToInt32(fs.ReadLine)
fs.Close()
DriveListBox1.Drive = Path.GetPathRoot(MusicDir)
DirListBox1.Path = MusicDir
FileListBox1.SelectedIndex = Fileindex
'播放
Play(PlayPos)
btnPlay.Text = "暂停"
Else
btnPlay.Text = "播放"
End If
End Sub
只是播放器里面的一段代码，看有错没？什么提示都没？就是运行不出“未处理的“System.ArgumentOutOfRangeException”类型的异常出现在 system.windows.forms.dll 中

其他信息：指定的参数已超出有效值的范围。”