Dim domXmlDocument As System.Xml.XmlDocument
    Dim tmpPath As String = AppTempFilePath
    Dim xmlFile As String = tmpPath + "\testXml.xml"

''''窗体加载事件
    Private Sub TestXml_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ''''读xml过程测试通过
        Dim domXmlDocument As System.Xml.XmlDocument
        Dim tmpPath As String = AppTempFilePath
        Dim xmlFile As String = tmpPath + "\testXml.xml"
        Dim reader As System.Xml.XmlReader = Nothing
        Try
            reader = New Xml.XmlTextReader(xmlFile)
            ''''reader.
            While reader.Read
                Me.lboxXml.Items.Add(reader.Name + reader.Value)
            End While

        Catch ex As Exception
            MsgBox(ex.Message)
        Finally
            If Not (reader Is Nothing) Then
                reader.Close()
            End If
        End Try

    End Sub

    ''''载入xml事件
    Private Sub btnXmlLoad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnXmlLoad.Click
        ''''Me.lboxXml.Items.Clear()
        ''''''''读xml过程测试通过

        ''''Dim reader As System.Xml.XmlReader = Nothing
        ''''Try
        ''''    reader = New Xml.XmlTextReader(xmlFile)
        ''''    While reader.Read
        ''''        Me.lboxXml.Items.Add(reader.Name + ":" + reader.Value)
        ''''    End While
        ''''Catch ex As Exception
        ''''    MsgBox(ex.Message)
        ''''Finally
        ''''    If Not (reader Is Nothing) Then
        ''''        reader.Close()
        ''''    End If
        ''''End Try
        Dim ds As New DataSet
        Try
            ''''如果直接使用ds做datasource则不会展开datagrid，用dv则可以直接显示正确。
            ds.ReadXml(xmlFile)
            Dim tb As DataTable
            Dim dv As DataView
            tb = ds.Tables(0)
            dv = New DataView(tb)
            DataGrid1.DataSource = dv
            ''''DataGrid1.DataMember = "testXmlMember"
            ''''DataGrid1.DataMember = "employeefname"
            ''''Dim dxd As New XmlDataDocument
        Catch ex As Exception
            MsgBox(ex.Message.ToString)
        End Try

    End Sub

    ''''保存新建xml内容事件
    Private Sub btnSaveNew_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSaveNew.Click

        Dim myTW As New XmlTextWriter(tmpPath + "\testXmlWrite.xml", Nothing)

        myTW.WriteStartDocument()
        myTW.Formatting = Formatting.Indented

        myTW.WriteStartElement("Team")

        myTW.WriteStartElement("player")
        myTW.WriteAttributeString("Name", "George Zip")
        myTW.WriteAttributeString("Position", "QB")
        myTW.WriteElementString("Nickname", "Zippy")
        myTW.WriteElementString("JerseyNumber", XmlConvert.ToString(7))

        myTW.WriteEndElement()

        myTW.WriteEndElement()

        myTW.WriteEndDocument()

        myTW.Close()

    End Sub

对于修改datagrid中指定内容并保存到xml中还不会,弄明白了,在vb.net与xml读写的2中写出来!