Don't you want the
Server.MapPath
Sub loadXmlToGridview()
Dim ds As New DataSet()
Dim dataUrl As String = HttpContext.Current.Server.MapPath(~/Logdata3.xml")
ds.ReadXml(dataUrl)
Dim dv As DataView = New DataView(ds.Tables(0))
dgvXmlPathSetting.DataSource = dv
dgvXmlPathSetting.DataBind()
End Sub