Error:InitializeComponent();

07-03-2009 12:54 PM |

Hi,

im a new one to silverlight. when i was trying to put a example of Introducing Microsoft Silverlight2 into practice, i encountered this problem.

Here is the code.

1    public partial class Page : UserControl
2        {
3            double beginX = 0;
4            double beginY = 0;
5            bool isMouseDown = false;
6    
7            public Page()
8            {
9                InitializeComponent();
10           }
11   
12           private void Ellipse_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
13           {
14               Ellipse b = sender as Ellipse;
15               beginX = e.GetPosition(this).X;
16               beginY = e.GetPosition(this).Y;
17               isMouseDown = true;
18               b.CaptureMouse();
19           }
20   
21           private void Ellipse_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
22           {
23               Ellipse b = sender as Ellipse;
24               isMouseDown = false;
25               b.ReleaseMouseCapture();
26           }
27   
28           private void Ellipse_MouseMove(object sender, MouseButtonEventArgs e)
29           {
30               if (isMouseDown == true)
31               {
32                   Ellipse b = sender as Ellipse;
33                   double currX = e.GetPosition(this).X;
34                   double currY = e.GetPosition(this).Y;
35                   b.SetValue(Canvas.TopProperty, currX);
36                   b.SetValue(Canvas.TopProperty, currY);
37               }
38           }
39       }

1    <Grid x:Name="LayoutRoot" Background="White">
2            <Canvas Width="400" Height="300" Background="Wheat">
3                <Ellipse Fill="Black" Width="20" Height="20"
4                         MouseLeftButtonDown="Ellipse_MouseLeftButtonDown"
5                         MouseLeftButtonUp="Ellipse_MouseLeftButtonUp"
6                         MouseMove="Ellipse_MouseMove"/>
7                <Ellipse Canvas.Top="20" Fill="Black" Width="20" Height="20"
8                         MouseLeftButtonDown="Ellipse_MouseLeftButtonDown"
9                         MouseLeftButtonUp="Ellipse_MouseLeftButtonUp"
10                        MouseMove="Ellipse_MouseMove"/>
11           </Canvas>
12    </Grid>

The code is to drag ellipse from startpoint to somewhere else.

It was error discription  AG_E_PARSER_BAD_PROPERTY_VALUE [Line: 10 Position: 32] and it related to InitializeComponent();

Re: Error:InitializeComponent();

07-03-2009 1:14 PM |

The first thing you need to realize is that your corresponding XAML must contain a UserControl element with the x:Class attribute value pointing to your fully qualified class name. This allows you to take advantage of partial classes and is the key to working with XAML files. Examine the following revised code sample and see if this helps you out.

using System.Windows.Controls;

using System.Windows.Input;

using System.Windows.Shapes;

namespace ExampleNamespace

{

    public partial class Page : UserControl

    {

        double beginX = 0;

        double beginY = 0;

        bool isMouseDown = false;

        public Page()

        {

            InitializeComponent();

        }

        private void Ellipse_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

        {

            Ellipse b = sender as Ellipse;

            beginX = e.GetPosition(this).X;

            beginY = e.GetPosition(this).Y;

            isMouseDown = true;

            b.CaptureMouse();

        }

        private void Ellipse_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

        {

            Ellipse b = sender as Ellipse;

            isMouseDown = false;

            b.ReleaseMouseCapture();

        }

        private void Ellipse_MouseMove(object sender, MouseButtonEventArgs e)

        {

            if (isMouseDown == true)

            {

                Ellipse b = sender as Ellipse;

                double currX = e.GetPosition(this).X;

                double currY = e.GetPosition(this).Y;

                b.SetValue(Canvas.TopProperty, currX);

                b.SetValue(Canvas.TopProperty, currY);

            }

        }

    }

}

<UserControl

    x:Class="ExampleNamespace.Page"

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

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

    <Grid

        x:Name="LayoutRoot"

        Background="White">

        <Canvas

            Width="400"

            Height="300"

            Background="Wheat">

            <Ellipse

                Fill="Black"

                Width="20"

                Height="20"

                MouseLeftButtonDown="Ellipse_MouseLeftButtonDown"

                MouseLeftButtonUp="Ellipse_MouseLeftButtonUp"

                MouseMove="Ellipse_MouseMove" />

            <Ellipse

                Canvas.Top="20"

                Fill="Black"

                Width="20"

                Height="20"

                MouseLeftButtonDown="Ellipse_MouseLeftButtonDown"

                MouseLeftButtonUp="Ellipse_MouseLeftButtonUp"

                MouseMove="Ellipse_MouseMove" />

        </Canvas>

    </Grid>

</UserControl>

Re: Error:InitializeComponent();

07-04-2009 12:58 AM |

Thanks, but i've done what you said. Here is the whole code. It's doesn't work.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
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 SilverlightApplication6
{
    public partial class Page : UserControl
    {
        double beginX = 0;
        double beginY = 0;
        bool isMouseDown = false;

        public Page()
        {
            InitializeComponent();
        }

        private void Ellipse_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            Ellipse b = sender as Ellipse;
            beginX = e.GetPosition(this).X;
            beginY = e.GetPosition(this).Y;
            isMouseDown = true;
            b.CaptureMouse();
        }

        private void Ellipse_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            Ellipse b = sender as Ellipse;
            isMouseDown = false;
            b.ReleaseMouseCapture();
        }

        private void Ellipse_MouseMove(object sender, MouseButtonEventArgs e)
        {
            if (isMouseDown == true)
            {
                Ellipse b = sender as Ellipse;
                double currX = e.GetPosition(this).X;
                double currY = e.GetPosition(this).Y;
                b.SetValue(Canvas.TopProperty, currX);
                b.SetValue(Canvas.TopProperty, currY);
            }
        }
    }
}

1    <UserControl x:Class="SilverlightApplication6.Page"
2        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
3        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
4        Width="400" Height="300">
5        <Grid x:Name="LayoutRoot" Background="White">
6            <Canvas Width="400" Height="300" Background="Wheat">
7                <Ellipse Fill="Black" Width="20" Height="20"
8                         MouseLeftButtonDown="Ellipse_MouseLeftButtonDown"
9                         MouseLeftButtonUp="Ellipse_MouseLeftButtonUp"
10                        MouseMove="Ellipse_MouseMove"/>
11               <Ellipse Canvas.Top="20" Fill="Black" Width="20" Height="20"
12                        MouseLeftButtonDown="Ellipse_MouseLeftButtonDown"
13                        MouseLeftButtonUp="Ellipse_MouseLeftButtonUp"
14                        MouseMove="Ellipse_MouseMove"/>
15           </Canvas>
16       </Grid>
17   </UserControl>

Re: Re: Re: Error:InitializeComponent();

07-04-2009 7:41 AM |

Thank you.

 And how stupid i am.

Re: Re: Error:InitializeComponent();

07-04-2009 11:13 AM |

I'm afraid I was staring at the forest and missed the tree!