Getting XamlParseException when calling XamlReader.Load(xmlReader)

Question

I am getting XamlParseException when calling XamlReader.Load() in button1_Click(object sender, RoutedEventArgs e) the code below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data.SqlClient;
using System.Data;
using System.IO;
using HTMLConverter;
using System.Windows.Markup;


namespace StackoverflowTest
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public static SqlConnection conn = new SqlConnection("Server=" + @".\SQLEXPRE" +
                                    ";Initial Catalog=Hukuk;" +
                                    "Integrated Security=True;" +
                                    "User ID=;" +
                                    "Password=;");

        public MainWindow()
        {
            InitializeComponent();
            try
            {
                conn.Open();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error opening SQL Server connection\n" + ex.Message);
                //Close();
            }

        }

        public static FlowDocument SetRTF(string xamlString)
        {
            StringReader stringReader = new StringReader(xamlString);
            System.Xml.XmlReader xmlReader = System.Xml.XmlReader.Create(stringReader);
            return XamlReader.Load(xmlReader) as FlowDocument;
        }


        private void button1_Click(object sender, RoutedEventArgs e)
        {
            SqlCommand commProc = new SqlCommand("SELECT Name, Content from Document where ID=3219", MainWindow.conn);
            string str;
            FlowDocumentReader fdocr = new FlowDocumentReader();
            SqlDataReader dr = commProc.ExecuteReader();
            try
            {
                if (dr.Read())
                {
                    byte[] bt = (byte[])dr["Content"];
                    str = Encoding.Default.GetString(bt);
                    str = HTMLConverter.HtmlToXamlConverter.ConvertHtmlToXaml(str, true);
                    fdocr.Document = MainWindow.SetRTF(str);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("An error occured while trying to view document\n" + ex.Message);
            }

            dr.Close();
            dr.Dispose();
        }
    }
}

Unfortunately a cannot post the xamlstring I'm trying to pass because it is too big..Is there any other way to show it to you?

And the exception details are here:

System.Windows.Markup.XamlParseException occurred
  Message='Add value to collection of type 'System.Windows.Documents.TableRowGroupCollection' threw an exception.' Line number '1' and line position '28143'.
  Source=PresentationFramework
  LineNumber=1
  LinePosition=28143
  StackTrace:
       at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri)
       at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
       at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, Boolean skipJournaledProperties, Uri baseUri)
       at System.Windows.Markup.XamlReader.Load(XamlReader xamlReader, ParserContext parserContext)
       at System.Windows.Markup.XamlReader.Load(XmlReader reader, ParserContext parserContext, XamlParseMode parseMode)
       at System.Windows.Markup.XamlReader.Load(XmlReader reader)
       at WpfApplication1.MainWindow.SetRTF(String xamlString) in C:\Documents and Settings\nosirovkh\Рабочий стол\посл\WpfApplication1\WpfApplication1\WpfApplication1\MainWindow.xaml.cs:line 69
  InnerException: System.ArgumentNullException
       Message=Value cannot be null.
Parameter name: item
       Source=PresentationFramework
       ParamName=item
       StackTrace:
            at MS.Internal.Documents.TableTextElementCollectionInternal`2.Add(TElementType item)
            at MS.Internal.Documents.ContentElementCollection`2.System.Collections.IList.Add(Object value)
            at System.Windows.Documents.TableRowGroupCollection.System.Collections.IList.Add(Object value)
            at System.Xaml.Schema.XamlTypeInvoker.AddToCollection(Object instance, Object item)
            at MS.Internal.Xaml.Runtime.ClrObjectRuntime.Add(Object collection, XamlType collectionType, Object value, XamlType valueXamlType)
       InnerException:

Your code doesn't throw any exception for me. Either it's caused by something in your …, or something completely different. Try to create a simple application that actually reproduces the issues and post it here. — svick
– svick, Commented Feb 4, 2012 at 13:27
@svick: I agree, creating a simple repro application is the way to go here. I don't want to see code that generates an error that mentions line position 41430. — Luke Woodward
– Luke Woodward, Commented Feb 4, 2012 at 14:19
It looks like you are trying to add null into a TableRowGroupCollection. If you format the XAML with proper indentation and line breaks instead of all on one line (as I assume it is), you should be able to find the specific line that has the problem. If you post the XAML at that point, we should be able to narrow down the problem. — Kendall Frey
– Kendall Frey, Commented Feb 4, 2012 at 14:37
@svick I've created a simple application which reproduces the issue.@kendfrey The xamlstring value is too big to post it here, can I e-mail it to you or somehow else? — khurshed_nosirov
– khurshed_nosirov, Commented Feb 6, 2012 at 6:38
@kendfrey could you please tell me in details what you mean by saying "format the XAML with proper indentation and line breaks" ? — khurshed_nosirov
– khurshed_nosirov, Commented Feb 6, 2012 at 7:55

Kendall Frey · Accepted Answer · 2012-02-06 20:31:05Z

3

It looks like your XAML is probably generated by some program, which is the source of the problem.

Here is the problem:

<Table>
  <TableColumn Width="331"/>
  <TableColumn Width="48"/>
  <TableColumn Width="48"/>
  <TableColumn Width="48"/>
  <TableColumn Width="48"/>
  <TableColumn Width="44"/>
  <TableColumn Width="52"/>
  ...
</Table>

And here is the correct code:

<Table>
  <Table.Columns>
    <TableColumn Width="331"/>
    <TableColumn Width="48"/>
    <TableColumn Width="48"/>
    <TableColumn Width="48"/>
    <TableColumn Width="48"/>
    <TableColumn Width="44"/>
    <TableColumn Width="52"/>
  </Table.Columns>
  ...
</Table>

There are 6 tables where this occurs.

I don't know what generated this XAML, but this seems like a bad bug. You will either need it to be fixed or fix the XAML file yourself, either by writing a small program to find that kind of thing, or manually with (preferably) Visual Studio.

answered Feb 6, 2012 at 20:31

Kendall Frey

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2 Comments

khurshed_nosirov Over a year ago

Thanks for the response! I'm trying to write a small program to add <Table.Columns> and </Table.Columns> where it's necessary. I'll post the results as soon as I'm finished.

khurshed_nosirov Over a year ago

Thanks for all the responses, you helped me to solve my problem!

GRC · Accepted Answer · 2013-04-12 15:52:47Z

0

I had a similar error when launch a WPF application with the following xaml code:

<Window x:Class="XXX.Wpf.IV.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="IV" WindowState="Normal" Height="1024" Width="1280">

<Grid>
    <local:IVView x:Name="_ivView"/> 
</Grid>

</Window>

Turns out the reason that caused "XmalParseException add to collection..." was that my IVView class should have been UserControl but I created it as an extension of Window. I am suspecting that we have having similar issues.

answered Apr 12, 2013 at 15:52

GRC

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