DBF文件名下划线

Question

我正在编写一个VB NET程序，以使用OleDbReader读取dBase .dbf文件。当文件名包含下划线时，OleDbDataReader会给出文件未找到错误，而名称中没有下划线的相同文件就可以正常工作。

我正在做的一些示例代码：

    Dim dBaseConnection As OleDbConnection
    Dim dBaseCommand As OleDbCommand
    Dim dBaseDataReader As OleDbDataReader
    Dim schemaTable As DataTable
    Dim x, y, z

    Dim Builder As New OleDbConnectionStringBuilder With
        {
            .DataSource = IO.Path.GetDirectoryName(filename),
            .Provider = "Microsoft.Jet.OLEDB.4.0"
        }
    Builder.Add("Extended Properties", "dBase III")

    dBaseConnection = New OleDbConnection With {.ConnectionString = Builder.ConnectionString}
    dBaseConnection.Open()

    dBaseCommand = New OleDbCommand("SELECT * FROM " & filename, dBaseConnection)
    dBaseDataReader = dBaseCommand.ExecuteReader(CommandBehavior.SequentialAccess)
    schemaTable = dBaseDataReader.GetSchemaTable()

        While dBaseDataReader.Read And Not _abort
            x = Val(dBaseDataReader("x").ToString)
            y = Val(dBaseDataReader("y").ToString)
            z = Val(dBaseDataReader("z").ToString)

            'do other stuff here
        End While

有人知道下划线是否是dbf文件名的禁止符号吗？还是这是某种错误？

在这种情况下，文件名是“ c：\ temp \ test_info.dbf”。