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Name cannot begin with the '%' character, hexadecimal value 0x25. Line 1, position 2.

Posted on 2009-04-01
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3,387 Views
Last Modified: 2012-05-06
i am calling for an aspx page and this page generates the xml data dynamically.  I went to the browser and it is displaying results below.   Why is my dropdown menu generating error when trying to load data from my xml data?  


  <?xml version="1.0" encoding="utf-8" ?>
- <Items>
  <Item text="Black" value="2" ImageUrl="Images/black.jpg" />
  </Items>
Dim writer As New XmlTextWriter(Response.OutputStream, Encoding.UTF8)
        writer.WriteStartDocument()
        writer.WriteStartElement("Items")
 
        Dim strConn2 As String = ConfigurationManager.ConnectionStrings("test").ConnectionString
        Dim conn2 As New SqlConnection(strConn2)
        conn2.Open()
 
        Dim cmd2 As New Data.SqlClient.SqlCommand("wmCGColorSP", conn2)
        cmd2.CommandType = CommandType.StoredProcedure
        cmd2.Parameters.Add("@item", SqlDbType.VarChar).Value = Request.QueryString("id")
 
        Dim dr As Data.SqlClient.SqlDataReader = Nothing
        dr = cmd2.ExecuteReader()
        While dr.Read()
            Dim description As String = String.Empty
            If ((Not dr("description") Is Nothing)) And (Not IsDBNull(dr("description"))) Then
                description = Convert.ToString(dr("description")) 'This will avoid exception if dr2("picture") is null
            End If
 
            Dim varvalue As Integer = 1
            varvalue = varvalue + 1
 
            Dim foto As String
            If description = "Blue" Then
                foto = "Images/blue.jpg"
            ElseIf description = "red" Then
                foto = "Images/Red.jpg"
            ElseIf description = "Black" Then
                foto = "Images/black.jpg"
            ElseIf description = "Orange" Then
                foto = "Images/orange.jpg"
 
            End If
 
 
 
            ' Creating the <visitInfo> element
            writer.WriteStartElement("Item")
            'writer.WriteAttributeString("timeVisited", DateTime.Now.ToString())
            writer.WriteAttributeString("text", description)
            writer.WriteAttributeString("value", varvalue)
 
            writer.WriteAttributeString("ImageUrl", foto)
       
            writer.WriteEndElement()
        End While
 
 
 
        conn2.Close()
 
        ' Response.Write(Session("xml"))
        writer.WriteEndElement()
        writer.WriteEndDocument()
        writer.Close()
    End Sub

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Question by:gianitoo
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8 Comments
 
LVL 27

Expert Comment

by:nmarun
ID: 24038899
Please post the code where you are binding the xml to the dropdown menu.
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LVL 1

Author Comment

by:gianitoo
ID: 24038912
    If Not Page.IsPostBack Then
            Dim combo As RadComboBox = FormView1.FindControl("RadComboBoxPaymentMethod")

            combo.LoadContentFile("~/xml.aspx")
        End If
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LVL 27

Expert Comment

by:nmarun
ID: 24038933
You do realize you are loading an .aspx page right? Shouldn't that be an .xml file?
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Author Comment

by:gianitoo
ID: 24038961
yes but my aspx generates the xml.  

this is the code

<%@ Page Language="VB" ContentType="text/xml" CodeFile="xml.aspx.vb" Inherits="xml" %>

and in my code behind

Imports System.Xml
Imports System.Data.SqlClient
Imports System.Data

Partial Class xml
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim writer As New XmlTextWriter(Response.OutputStream, Encoding.UTF8)
        writer.WriteStartDocument()
        writer.WriteStartElement("Items")

        Dim strConn2 As String = ConfigurationManager.ConnectionStrings("test").ConnectionString
        Dim conn2 As New SqlConnection(strConn2)
        conn2.Open()

        Dim cmd2 As New Data.SqlClient.SqlCommand("wmCGColorSP", conn2)
        cmd2.CommandType = CommandType.StoredProcedure
        cmd2.Parameters.Add("@item", SqlDbType.VarChar).Value = Request.QueryString("id")

        Dim dr As Data.SqlClient.SqlDataReader = Nothing
        dr = cmd2.ExecuteReader()
        While dr.Read()
            Dim description As String = String.Empty
            If ((Not dr("description") Is Nothing)) And (Not IsDBNull(dr("description"))) Then
                description = Convert.ToString(dr("description")) 'This will avoid exception if dr2("picture") is null
            End If

            Dim varvalue As Integer = 1
            varvalue = varvalue + 1

            Dim foto As String
            If description = "Blue" Then
                foto = "Images/blue.jpg"
            ElseIf description = "red" Then
                foto = "Images/Red.jpg"
            ElseIf description = "Black" Then
                foto = "Images/black.jpg"
            ElseIf description = "Orange" Then
                foto = "Images/orange.jpg"

            End If



            ' Creating the <visitInfo> element
            writer.WriteStartElement("Item")
            'writer.WriteAttributeString("timeVisited", DateTime.Now.ToString())
            writer.WriteAttributeString("text", description)
            writer.WriteAttributeString("value", varvalue)

            writer.WriteAttributeString("ImageUrl", foto)
       
            writer.WriteEndElement()
        End While



        conn2.Close()

        ' Response.Write(Session("xml"))
        writer.WriteEndElement()
        writer.WriteEndDocument()
        writer.Close()
    End Sub
End Class
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LVL 27

Expert Comment

by:nmarun
ID: 24039010
gianitoo, That is not a good way to program. Your xml.aspx page does create the xml for you, but if you see the first line of your page:
<%@ Page ...
It is complaining about the '%' sign. You cannot remove it from the page, nor can XML work with this. So it's better you write the xml to another file.. an actual xml file.

You could try something like this:

Dim writer As New XmlTextWriter(Server.MapPath("~/data.xml"), Encoding.UTF8)
.. do the rest of the things and then do:
 combo.LoadContentFile(Server.MapPath("~/data.xml"))
0
 
LVL 1

Author Comment

by:gianitoo
ID: 24039070
How can I send my code that generates the xml data to apage called "data.xml"?
I am a little confused.  
0
 
LVL 1

Author Comment

by:gianitoo
ID: 24040290
Ok i got it .   my code below is generating an XML file called "generated.xml"
the issue is that the aspx page needs to be called in order to generate latest data in xml file.   how can i load my dropdown with latest data.  

My assumption i somehow call for aspx page before loading the dropdown???
Hoa can i accomplish it? right now it is only loading xml file.  

    If Not Page.IsPostBack Then
            Dim combo As RadComboBox = FormView1.FindControl("RadComboBoxPaymentMethod")

            combo.LoadContentFile("~/generated.xml")
        End If


xml.aspx code below
 
 
<%@ Page Language="VB"  %>
 
<%@ Import Namespace="System.Data.SqlClient" %>
 
<%@ Import Namespace="System.Data" %>
 
<%@ Import Namespace="System.Xml" %>
 
<script runat="server">
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim xmlDoc As String = Server.MapPath("generated.xml")
        Dim writer As XmlTextWriter = Nothing
        'Try
        writer = New XmlTextWriter(xmlDoc, Encoding.UTF8)
        writer.Formatting = Formatting.Indented
        writer.WriteStartDocument(True)
 
        writer.WriteComment("This file was generated from an ASPX file")
 
        writer.WriteStartElement("Items")
 
        Dim strConn2 As String = ConfigurationManager.ConnectionStrings("test").ConnectionString
        Dim conn2 As New SqlConnection(strConn2)
        conn2.Open()
 
        Dim cmd2 As New Data.SqlClient.SqlCommand("wmCGColorSP", conn2)
        cmd2.CommandType = CommandType.StoredProcedure
        cmd2.Parameters.Add("@item", SqlDbType.VarChar).Value = Request.QueryString("id")
 
        Dim dr As Data.SqlClient.SqlDataReader = Nothing
        dr = cmd2.ExecuteReader()
        While dr.Read()
            Dim description As String = String.Empty
            If ((Not dr("description") Is Nothing)) And (Not IsDBNull(dr("description"))) Then
                description = Convert.ToString(dr("description")) 'This will avoid exception if dr2("picture") is null
            End If
 
            Dim varvalue As Integer = 1
            varvalue = varvalue + 1
 
            Dim foto As String
            If description = "Blue" Then
                foto = "Images/blue.jpg"
            ElseIf description = "red" Then
                foto = "Images/Red.jpg"
            ElseIf description = "Black" Then
                foto = "Images/black.jpg"
            ElseIf description = "Orange" Then
                foto = "Images/orange.jpg"
 
            End If
 
 
            writer.WriteStartElement("Item", Nothing)
            writer.WriteAttributeString("Text", description)
            writer.WriteAttributeString("Value", varvalue)
            writer.WriteAttributeString("ImageUrl", foto)
 
            writer.WriteEndElement()
 
        End While
 
        writer.Flush()
        writer.Close()
        Dim doc As New XmlDocument()
        doc.Load(xmlDoc)
        Response.ContentType = "text/xml"
        doc.Save(Response.Output)
        'Catch
        '    Response.Write(e.ToString())
        'Finally
        '    If writer IsNot Nothing Then
        '        writer.Close()
        '    End If
        'End Try
    End Sub
</script>

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LVL 27

Accepted Solution

by:
nmarun earned 500 total points
ID: 24041051
You could try something like this:

mports System.Xml
Imports System.Data.SqlClient
Imports System.Data
 
Partial Class xml
    Inherits System.Web.UI.Page
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim xmlDoc As String = Server.MapPath("generated.xml")
        Dim writer As XmlTextWriter = Nothing
        writer = New XmlTextWriter(xmlDoc, Encoding.UTF8)
        writer.Formatting = Formatting.Indented
        writer.WriteStartDocument()
        writer.WriteStartElement("Items")
 
        Dim strConn2 As String = ConfigurationManager.ConnectionStrings("test").ConnectionString
        Dim conn2 As New SqlConnection(strConn2)
        conn2.Open()
 
        Dim cmd2 As New Data.SqlClient.SqlCommand("wmCGColorSP", conn2)
        cmd2.CommandType = CommandType.StoredProcedure
        cmd2.Parameters.Add("@item", SqlDbType.VarChar).Value = Request.QueryString("id")
 
        Dim dr As Data.SqlClient.SqlDataReader = Nothing
        dr = cmd2.ExecuteReader()
        While dr.Read()
            Dim description As String = String.Empty
            If ((Not dr("description") Is Nothing)) And (Not IsDBNull(dr("description"))) Then
                description = Convert.ToString(dr("description")) 'This will avoid exception if dr2("picture") is null
            End If
 
            Dim varvalue As Integer = 1
            varvalue = varvalue + 1
 
            Dim foto As String
            If description = "Blue" Then
                foto = "Images/blue.jpg"
            ElseIf description = "red" Then
                foto = "Images/Red.jpg"
            ElseIf description = "Black" Then
                foto = "Images/black.jpg"
            ElseIf description = "Orange" Then
                foto = "Images/orange.jpg"
 
            End If
 
            ' Creating the <visitInfo> element
            writer.WriteStartElement("Item")
            'writer.WriteAttributeString("timeVisited", DateTime.Now.ToString())
            writer.WriteAttributeString("text", description)
            writer.WriteAttributeString("value", varvalue)
 
            writer.WriteAttributeString("ImageUrl", foto)
       
            writer.WriteEndElement()
        End While
 
        conn2.Close()
 
        ' Response.Write(Session("xml"))
        writer.WriteEndElement()
        writer.WriteEndDocument()
        writer.Close()
        RadComboBoxPaymentMethod.LoadContentFile("generated.xml")
 
    End Sub
End Class

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