Treeview and XML

[Evan Kontos]

I am trying to implement a Treeview w/an XML file and I even copied and
pasted examples from MSDN but can't get them to work. Any suggestions
welcome.

XML File

<TREENODES>
<TREENODE TEXT="Document-1">
<TREENODE TEXT="Folder-1" EXPANDED="true" >
<TREENODE TEXT="Document-2" />
<TREENODE TEXT="Document-3" />
</TREENODE>
<TREENODE TEXT="Document-4">
</TREENODES>
Control Source

<iewc:TreeVie w id="TreeView1" style="Z-INDEX: 102; LEFT: 168px;
POSITION: absolute; TOP: 120px" runat="server"
TREENODESRC="Na vigateTree.xml" ></iewc:TreeView>

Error

Server Error in '/Manager' Application.
------------------------------------------------------------------------
--------

The data at the root level is invalid. Line 1, position 1.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.Xml.XmlE xception: The data at the root level
is invalid. Line 1, position 1.


Evan Kontos | EK*****@comtekc add.com

27 Whitehall St. | 3rd Floor | New York, NY 10004
Tel [phone] | Fax [phone] | Personal Fax [phone]
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[Cor]

Evan,
Will you help me, I want to use a Treeview on a webpage. I saw it with aspx
and scripting but not with VB.net, can you tell me where I can find this.
Cor

[Peter Huang [MSFT]]

Hi Evan,

You may try to modified the XML file as follows.
<TREENODES>
<TREENODE TEXT="Document-1"/>
<TREENODE TEXT="Folder-1" EXPANDED="true" >
<TREENODE TEXT="Document-2" />
<TREENODE TEXT="Document-3" />
</TREENODE>
<TREENODE TEXT="Document-4"/>
</TREENODES>
[Note: the node in xml file should end with /
e.g.
<TREENODE TEXT="Document-1"/>
and
<TREENODE TEXT="Folder-1" EXPANDED="true" >
</TREENODE>
is correct syntax.
In addition the <TREENODE TEXT="Document-1"/> is the brief form of
<TREENODE TEXT="Document-1"></TREENODE>.

If you have further related question please feel free to contact me.

Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

--------------------

From: Evan Kontos <ek*****@comtek cadd.com>
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Subject: Treeview and XML
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X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb

I am trying to implement a Treeview w/an XML file and I even copied and
pasted examples from MSDN but can't get them to work. Any suggestions
welcome.

XML File

<TREENODES>
<TREENODE TEXT="Document-1">
<TREENODE TEXT="Folder-1" EXPANDED="true" >
<TREENODE TEXT="Document-2" />
<TREENODE TEXT="Document-3" />
</TREENODE>
<TREENODE TEXT="Document-4">
</TREENODES>
Control Source

<iewc:TreeVi ew id="TreeView1" style="Z-INDEX: 102; LEFT: 168px;
POSITION: absolute; TOP: 120px" runat="server"
TREENODESRC="N avigateTree.xml "></iewc:TreeView>

Error

Server Error in '/Manager' Application.
------------------------------------------------------------------------
--------

The data at the root level is invalid. Line 1, position 1.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.Xml.XmlE xception: The data at the root level
is invalid. Line 1, position 1.


Evan Kontos | EK*****@comtekc add.com

27 Whitehall St. | 3rd Floor | New York, NY 10004
Tel [phone] | Fax [phone] | Personal Fax [phone]
www.comtekcadd.com

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[Evan Kontos]

Peter,
Tried the change that you recommended but I still get the same error
message. This is also at the top of the XML file

<?xml version='1.0'?>

and the rest of the file:

<TREENODES>
<TREENODE TEXT="Document-1"/>
<TREENODE TEXT="Folder-1" EXPANDED="true" >
<TREENODE TEXT="Document-2" />
<TREENODE TEXT="Document-3" />
</TREENODE>
<TREENODE TEXT="Document-4"/>
</TREENODES>
any more suggestions?

Evan Kontos | EK*****@comtekc add.com

27 Whitehall St. | 3rd Floor | New York, NY 10004
Tel [phone] | Fax [phone] | Personal Fax [phone]
www.comtekcadd.com

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[Peter Huang [MSFT]]

Hi Evan,

I can not reproduce the problem. Here is my test code. I tested on
VS.NET2003.
I hope you can create a new project and perform the test and let me know
the result.
1.Create a new Webapplication
2.Drag the TreeView control to the webform
3.Modified the NavigateTree.xm l and yourapp.aspx as follows.
[NavigateTree.xm l, please place it in the same directory as the one of
yourapp.aspx]
<?xml version='1.0'?>
<TREENODES>
<TREENODE TEXT="Document-1"/>
<TREENODE TEXT="Folder-1" EXPANDED="true" >
<TREENODE TEXT="Document-2" />
<TREENODE TEXT="Document-3" />
</TREENODE>
<TREENODE TEXT="Document-4"/>
</TREENODES>

[yourapp.aspx]
<%@ Register TagPrefix="iewc " Namespace="Micr osoft.Web.UI.We bControls"
Assembly="Micro soft.Web.UI.Web Controls" %>
<%@ Page language="c#" Codebehind="Web Form1.aspx.cs"
AutoEventWireup ="false" Inherits="WebAp plication3.WebF orm1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm1 </title>
<meta content="Micros oft Visual Studio .NET 7.1" name="GENERATOR ">
<meta content="C#" name="CODE_LANG UAGE">
<meta content="JavaSc ript" name="vs_defaul tClientScript">
<meta content="http://schemas.microso ft.com/intellisense/ie5"
name="vs_target Schema">
</HEAD>
<body MS_POSITIONING= "GridLayout ">
<form id="Form1" method="post" runat="server">
<iewc:treevie w id="TreeView1" style="Z-INDEX: 101; LEFT: 8px; POSITION:
absolute; TOP: 8px" runat="server"
TREENODESRC="Na vigateTree.xml" ></iewc:treeview></FONT></form>
</body>
</HTML>

Please perform the test and let me know the result. This will help me
narrow down and isolate the problem.
Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

--------------------

From: Evan Kontos <ek*****@comtek cadd.com>
References: <lc************ **@cpmsftngxa06 .phx.gbl>
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Subject: RE: Treeview and XML
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X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb

Peter,
Tried the change that you recommended but I still get the same error
message. This is also at the top of the XML file

<?xml version='1.0'?>

and the rest of the file:

<TREENODES>
<TREENODE TEXT="Document-1"/>
<TREENODE TEXT="Folder-1" EXPANDED="true" >
<TREENODE TEXT="Document-2" />
<TREENODE TEXT="Document-3" />
</TREENODE>
<TREENODE TEXT="Document-4"/>
</TREENODES>
any more suggestions?

Evan Kontos | EK*****@comtekc add.com

27 Whitehall St. | 3rd Floor | New York, NY 10004
Tel [phone] | Fax [phone] | Personal Fax [phone]
www.comtekcadd.com

*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!

[Evan Kontos]

Peter,
Here is the error that I get. It seems the same. I click on the data
tab at the bottom of the XML page and I see a grid w/the values and it
looks OK. ANy ideas?

The data at the root level is invalid. Line 1, position 1.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.Xml.XmlE xception: The data at the root level
is invalid. Line 1, position 1.

Source Error:

An unhandled exception was generated during the execution of the current
web request. Information regarding the origin and location of the
exception can be identified using the exception stack trace below.

Stack Trace:
[XmlException: The data at the root level is invalid. Line 1, position
1.]
System.Xml.XmlT extReader.Parse Root() +295
System.Xml.XmlT extReader.Read( ) +127
Microsoft.Web.U I.WebControls.T reeView.ReadXml Src(String TreeNodeSrc,
String TreeNodeXsltSrc , String strOuter) +136
Microsoft.Web.U I.WebControls.T reeView.ReadTre eNodeXmlSrc() +80
Microsoft.Web.U I.WebControls.T reeView.OnInit( EventArgs e) +90
System.Web.UI.C ontrol.InitRecu rsive(Control namingContainer ) +241
System.Web.UI.C ontrol.InitRecu rsive(Control namingContainer ) +179
System.Web.UI.C ontrol.InitRecu rsive(Control namingContainer ) +179
System.Web.UI.P age.ProcessRequ estMain() +174


Evan Kontos | EK*****@comtekc add.com

27 Whitehall St. | 3rd Floor | New York, NY 10004
Tel [phone] | Fax [phone] | Personal Fax [phone]
www.comtekcadd.com

*** Sent via Developersdex http://www.developersdex.com ***
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[Peter Huang [MSFT]]

Hi Evan,

You may try to set the TreeNodeSrc as following to see if this works for
you. [You may delete TREENODESRC="Na vigateTree.xml" in the aspx page]
private void Page_Load(objec t sender, System.EventArg s e)
{
TreeView1.TreeN odeSrc="<?xml version=\"1.0\" ?><TREENODES><T REENODE
TEXT=\"Document-1\"/><TREENODE TEXT=\"Folder-1\"
EXPANDED=\"true \"><TREENODE TEXT=\"Document-2\" /><TREENODE
TEXT=\"Document-3\" /></TREENODE><TREEN ODE
TEXT=\"Document-4\"/></TREENODES>";
TreeView1.DataB ind();
}

If this works for you, you may need to see if the user you used to access
the aspx page have the right to access the NavigateTree.xm l file. [If you
enable the anonymous access in the Directory Security/Anonymous access and
authentication control, then the user maybe IUSER_COMPUTERN AME.]
You may try to disable the anonymous access and enable the Integrated
Windows authentication.[Note, this will enable the browse to use the login
user account to access the aspx page and the NavigateTree.xm l , make sure
the user have the according rights]

Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
--------------------

From: Evan Kontos <ek*****@comtek cadd.com>
References: <eu************ *@cpmsftngxa06. phx.gbl>
X-Newsreader: AspNNTP 1.50 (ActionJackson. com)
Subject: RE: Treeview and XML
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Message-ID: <ez************ **@TK2MSFTNGP12 .phx.gbl>
Newsgroups: microsoft.publi c.dotnet.langua ges.vb
Date: Thu, 04 Sep 2003 09:47:44 -0700
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Lines: 1
Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP12.phx.g bl
Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.langua ges.vb:134270
X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb

Peter,
Here is the error that I get. It seems the same. I click on the data
tab at the bottom of the XML page and I see a grid w/the values and it
looks OK. ANy ideas?

The data at the root level is invalid. Line 1, position 1.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.Xml.XmlE xception: The data at the root level
is invalid. Line 1, position 1.

Source Error:

An unhandled exception was generated during the execution of the current
web request. Information regarding the origin and location of the
exception can be identified using the exception stack trace below.

Stack Trace:
[XmlException: The data at the root level is invalid. Line 1, position
1.]
System.Xml.XmlT extReader.Parse Root() +295
System.Xml.XmlT extReader.Read( ) +127
Microsoft.Web.U I.WebControls.T reeView.ReadXml Src(String TreeNodeSrc,
String TreeNodeXsltSrc , String strOuter) +136
Microsoft.Web.U I.WebControls.T reeView.ReadTre eNodeXmlSrc() +80
Microsoft.Web.U I.WebControls.T reeView.OnInit( EventArgs e) +90
System.Web.UI.C ontrol.InitRecu rsive(Control namingContainer ) +241
System.Web.UI.C ontrol.InitRecu rsive(Control namingContainer ) +179
System.Web.UI.C ontrol.InitRecu rsive(Control namingContainer ) +179
System.Web.UI.P age.ProcessRequ estMain() +174


Evan Kontos | EK*****@comtekc add.com

27 Whitehall St. | 3rd Floor | New York, NY 10004
Tel [phone] | Fax [phone] | Personal Fax [phone]
www.comtekcadd.com

*** Sent via Developersdex http://www.developersdex.com ***
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[Evan Kontos]

Peter,
What is it that you have sent me? I use VB and I have no idea what it
is you sent or where I should place it. Please advise in more detail if
you can. Thanks.
Evan Kontos | EK*****@comtekc add.com

27 Whitehall St. | 3rd Floor | New York, NY 10004
Tel [phone] | Fax [phone] | Personal Fax [phone]
www.comtekcadd.com

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[Peter Huang [MSFT]]

Hi Evan,

I am sorry that I have not provided the VB.NET code for you in my last post.
I think the problem is caused by that the user account that used to access
the asp page do not have the permission to access the NavigateTree.xm l file.
To workaround the problem, you have two methods.

1. The TreeView web control has a TreeNodeSrc property, you may set the
value to the xml file content in the Page_Load event. You may follow the
steps below to have a test.
1.1 Create a new WebApplication and add a TreeView Web Control onto the
WebForm1.aspx
1.2 Double-click on the WebForm1.aspx[not on any control]
1.3 Then the IDE will open the WebForm1.aspx.v b file and located in the
Page_Load Event handle function
1.4 Replace the
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
'Put user code to initialize the page here
End Sub
With
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
TreeView1.TreeN odeSrc = "<?xml version='1.0'?> <TREENODES><TRE ENODE
TEXT='Document-1'/><TREENODE TEXT='Folder-1' EXPANDED='true' ><TREENODE
TEXT='Document-2' /><TREENODE TEXT='Document-3' /></TREENODE><TREEN ODE
TEXT='Document-4'/></TREENODES>"
TreeView1.DataB ind()
End Sub
1.5 Press F5 to run the WebApplication to see if the problem persists.

2 You may also try to give the user account that used to access the
WebForm1.aspx the right to access the NavigateTree.xm l. In this case you
may indicate the TREENODESRC in the aspx page.(i.e. <iewc:treevie w
id="TreeView1" style="Z-INDEX: 101; LEFT: 8px; POSITION:
absolute; TOP: 8px" runat="server"
TREENODESRC="Na vigateTree.xml" ></iewc:treeview>)
For security concern, you may try to disable the anonymous access and
enable the windows integrated authentication. You may achieve that by
following the steps below.
2.1 Run inetmgr in the Run dialog and this will open the Internet
Information Services(IIS) Manager
2.2 Navigated to Internet Information Services/<Computer Name>/Web
Sites/Default Web Site/<WebApplication 5>, (This is the application name
that you indicated in the VS.NET IDE),
2.3 Right Click on the WebApplication5 and select Properties, this will
open the WebApplication5 Properties dialog.
2.4 Select Directory security and then select Authentication and access
control section click the Edit button. This will open the Authentication
methods dialog
2.5 Uncheck the Enable anonymous access and check the Integrated Windows
authentication. This will enable the browse use the log on user account to
access the aspx page, I assume the account have the permission to access
the NavigateTree.xm l file.
2.6 You may have a try and let me know the result. If you have any related
question please feel free to let me know.

[Peter Huang [MSFT]]

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