How to persist XMLDocument during post back? - vb.net

Question

How to presist XML Document on Post Back?
I have this xmlDocument to persist in SaveViewState() method:
Private _xmlSaveDispatch As XmlDocument = New XmlDocument
In my Page_Load...
If Not IsPostBack Then
Me._xmlSaveDispatch = New XmlDocument
Private Property XMLSaveDispatch As XmlDocument
Get
Return _xmlSaveDispatch
End Get
Set(value As XmlDocument)
_xmlSaveDispatch = value
End Set
End Property
Button Click Event:
Protected Sub dispatchButton_OnSave(sender As Object, e As EventArgs) _
Handles dispatchButtons.SaveDispatch
XMLSaveDispatch = _objDispatchInfo.GetSaveXML()
End Sub

Answer 1

I am writing a C# application and ran into the same issue (the asp:Xml tag does not persist between postbacks). Here is my code to persist it in C#:
//.aspx Presentation
<asp:Xml ID="xmlFormDisplay" runat="server"></asp:Xml>
//.aspx.cs Code Behind
private string formXSLT
{
get { return ViewState["FormXSLT"].ToString(); }
set { ViewState["FormXSLT"] = value; }
}
private string formXML
{
get { return ViewState["FormXML"].ToString(); }
set { ViewState["FormXML"] = value; }
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
...
}
xmlFormDisplay.TransformSource = formXSLT;
xmlFormDisplay.DocumentContent = formXML;
}
I'm not much of a VB developer, but this ought to work (or be pretty close):
//.aspx Presentation
<asp:Xml ID="xmlFormDisplay" runat="server"></asp:Xml>
//.aspx.vb Code Behind
Private Property FormXSLT As String
Get
Return ViewState["FormXSLT"].ToString()
End Get
Set(value As String)
ViewState["FormXSLT"] = value
End Set
End Property
Private Property FormXML As String
Get
Return ViewState["FormXML"].ToString()
End Get
Set(value As String)
ViewState["FormXML"] = value
End Set
End Property
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
...
End If
xmlFormDisplay.TransformSource = formXSLT
xmlFormDisplay.DocumentContent = formXML
End Sub