Border.Child - System.ArgumentException and System.Acce... RSS

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  UncleRedz

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  Border.Child - System.ArgumentException and System.AccessViolationException

  Mar 12, 2008 05:41 PM | LINK

  Hi,

  Using SL2B1 with C# (and IE7), the Border control will throw an exception if the Child property is set to the same object twice.

  Example:

  UserControl A;
  UserControl B;

  myBorder.Child = A; //OK
  myBorder.Child = B; //OK
  myBorder.Child = B; //Exception

  An exception of type 'System.ArgumentException' occurred in System.Windows.dll but was not handled in user code
  Additional information: Value does not fall within the expected range.

  Also along these lines, setting Child to null produces another exception,

  myBorder.Child = null;

  An exception of type 'System.AccessViolationException' occurred in System.Windows.dll but was not handled in user code
  Additional information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
  

  Cheers

  Silverlight Error Bug Controls Silverlight 2

• 

  Pranav Goel...

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  Re: Border.Child - System.ArgumentException and System.AccessViolationException

  Mar 15, 2008 01:03 AM | LINK

  Thank you for reporting this. We have logged it at our end and are investigating it.

• 

  BryX

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  Re: Border.Child - System.ArgumentException and System.AccessViolationException

  Apr 21, 2008 08:02 PM | LINK

  Is there a workaround yet? or a fix? I have a similar problem adding a new self defined XAML User Control to a Canvas, it gives me:

   An exception of type 'System.ArgumentException' occurred in System.Windows.dll but was not handled in user code

  Additional information: Value does not fall within the expected range.

  public void timeToXAML(SA11Demo2.Selector.Course course,Canvas destination, int x, int y)

  {

      Course newCourse = new Course(course.cName, x, y, course.ccID, 1);

      destination.Children.Add((Course)newObj);

  }

  Here are the course classes....

  //---- Course.cs ------

  using System;

  using System.Collections.Generic;

  using System.Linq;

  using System.Windows;

  using System.Windows.Controls;

  using System.Windows.Documents;

  using System.Windows.Input;

  using System.Windows.Media;

  using System.Windows.Media.Animation;

  using System.Windows.Shapes;

  namespace SA11Demo2

  {

  public partial class Course : UserControl

  {

  public string Id { get; set; }

  bool startDrag = false;

  public Course(string id, double x, double y, string courseCode, int type) //where type= Lec/Lab

  {

  InitializeComponent();

  // add eventhandlers

  CourseRec.MouseEnter += new MouseEventHandler(CourseRec_MouseEnter);

  CourseRec.MouseLeave += new MouseEventHandler(CourseRec_MouseLeave);

  CourseRec.MouseLeftButtonDown += new MouseButtonEventHandler(CourseRec_MouseLeftButtonDown);

  this.MouseLeftButtonUp += new MouseButtonEventHandler(Course_MouseLeftButtonUp);

  this.MouseMove += new MouseEventHandler(Course_MouseMove);

   

  // give a value to the properties

  this.Id = id;

  this.ccID.Text = courseCode;

  //this.cName.Text = courseName;

  this.type.Text = getCourseType(type);

   

  // set the top end left position on the parent canvas for the course

  this.SetValue(Canvas.LeftProperty, x);this.SetValue(Canvas.TopProperty, y);

  }

  string getCourseType(int type)

  {

  if(type.Equals(1)) //for when its a LEC

  {

  return("LEC");

  }

  else if (type.Equals(2)) //For when its a LAB

  {

  return ("LAB");

  }

  else

  {

  return ("NULL");

  }

  }

  void Course_MouseMove(object sender, MouseEventArgs e)

  {

  // only execute this code when the user has started dragging

  if (startDrag)

  {

  // position the center of the course to the cursor of the mouse

  this.SetValue(Canvas.LeftProperty, e.GetPosition((Canvas)this.Parent).X - CourseRec.ActualWidth / 2);this.SetValue(Canvas.TopProperty, e.GetPosition((Canvas)this.Parent).Y - CourseRec.ActualHeight / 2);

  }

  }

  void Course_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

  {

  // stop forcing the capture of the moue to this element

  CourseRec.ReleaseMouseCapture();

  startDrag = false;

  //TODO: use these property mutators to trigger a 'drop event' which will socket the course into place of the closest allowable position

  this.SetValue(Canvas.LeftProperty, e.GetPosition((Canvas)this.Parent).X - CourseRec.ActualWidth / 2);this.SetValue(Canvas.TopProperty, e.GetPosition((Canvas)this.Parent).Y - CourseRec.ActualHeight / 2);

   

   

  // double xPos = Convert.ToDouble(this.GetValue(Canvas.LeftProperty));

  //double yPos = Convert.ToDouble(this.GetValue(Canvas.TopProperty));

   

  Canvas main = this.Parent as Canvas;

  CourseRec_Background.Opacity = 1;

  }

  void CourseRec_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

  {

  // force the capture of the mouse to this element

  CourseRec.CaptureMouse();

  startDrag = true;

  CourseRec_Background.Opacity = 0.45;

  }

  void CourseRec_MouseLeave(object sender, MouseEventArgs e)

  {

   

  }

  void CourseRec_MouseEnter(object sender, MouseEventArgs e)

  {

   

  }

   

   

   

  <UserControl x:Class="SA11Demo2.Course"

  xmlns="http://schemas.microsoft.com/client/2007"

  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

  xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

  Width="171" Height="122" mc:Ignorable="d" x:Name="CourseControl">

  <UserControl.Resources>

  <Storyboard x:Name="fadeIn">

  <DoubleAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="(UIElement.Opacity)" BeginTime="00:00:00">

  <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0"/>

  <SplineDoubleKeyFrame KeyTime="00:00:01" Value="1"/>

  </DoubleAnimationUsingKeyFrames>

  </Storyboard>

  </UserControl.Resources>

   

  <Grid x:Name="LayoutRoot" Background="White" Width="171" Height="129">

  <Rectangle Cursor="Hand" HorizontalAlignment="Stretch" Margin="-1,-0.500999987125397,0,0.00100000004749745" VerticalAlignment="Stretch" Stroke="#FF000000" x:Name="CourseRec_Background">

  <Rectangle.Fill>

  <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0" SpreadMethod="Repeat">

  <GradientStop Color="#FF6C7C8C" Offset="1"/>

  <GradientStop Color="#FF2363A3" Offset="0"/>

  </LinearGradientBrush>

  </Rectangle.Fill>

  </Rectangle>

  <TextBlock Height="20" HorizontalAlignment="Right" Margin="0,0,8,11" VerticalAlignment="Bottom" Text="&lt;LEC?&gt;" TextWrapping="Wrap" FontSize="22" Foreground="#FFFFFFFF" x:Name="type" FontFamily="Courier New" Width="79.497" d:LayoutOverrides="HorizontalAlignment, Width"/>

  <TextBlock HorizontalAlignment="Center" Margin="0,0,0,0" VerticalAlignment="Top" FontSize="22" Text="&lt;ccID*1234&gt;" TextWrapping="Wrap" Foreground="#FFFFFFFF" x:Name="ccID" FontFamily="Courier New" Height="23.333"/>

  <Button Height="23" HorizontalAlignment="Left" Margin="0,0,0,8" VerticalAlignment="Bottom" Width="25.09" Content="X" FontSize="17" x:Name="ExitButton" Opacity="0.585" d:LayoutOverrides="Width"/>

   

  <Rectangle Cursor="Hand" HorizontalAlignment="Right" Margin="0,0,0,0.00100000004749745" VerticalAlignment="Bottom" Stroke="#FF000000" x:Name="CourseRec" Width="172" Height="129.5" Opacity="0">

  <Rectangle.Fill>

  <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0" SpreadMethod="Repeat">

  <GradientStop Color="#FF6C7C8C" Offset="1"/>

  <GradientStop Color="#FF2363A3" Offset="0"/>

  </LinearGradientBrush>

  </Rectangle.Fill>

  </Rectangle>

  </Grid>

  </UserControl>

   

   

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  jenhansen

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  Re: Border.Child - System.ArgumentException and System.AccessViolationException

  Jun 08, 2009 12:53 AM | LINK

  I ran into the same problem.  I was getting the ArgumentException error until I named all the elements I was adding with unique names. (Before they didn't have names)   This definitely seems like a bug, but at least the work around was easy enough.