主题：求助：想了解system.xml.dll中的相关命名及调用使用方法

 写了一个函数:

    Private Function ConvertXMLToDataSet(xmlData As String) As DataSet
        Dim stream As StringReader = Nothing
        Dim reader As XmlTextReader = Nothing
        Try
            Dim xmlDS As New DataSet()
            stream = New StringReader(xmlData)
            reader = New XmlTextReader(stream)
            xmlDS.ReadXml(reader)
            Return xmlDS
        Catch ex As Exception
            Dim strTest As String = ex.Message
            Return Nothing
        Finally
            If reader IsNot Nothing Then
                reader.Close()
            End If
        End Try
    End Function


执行是这样的:


   Dim mystr As New DataSet()
        mystr = ConvertXMLToDataSet("E:\xxxx\AUTHORS.XML")
        DataGridView1.DataSource = mystr.Tables(0)

执行后会崩溃! 

Dim filePath As String
        filePath = "E:\360云盘\Visual Basic.NET\第5章\实例100-将XML数据读入数据集\AUTHORS.XML"
        '将XML文件的完整路保存到filePath变量中()
        Dim mystr As New DataSet()
        mystr.ReadXml(filePath)
        With DataGridView1
            .DataSource = mystr.Tables(0)
            '  .DataMember = "authors"
            '   .CaptionText = .DataMember
        End With

 这样写也错误!