WPF Discussion Boards

arkiboys8-Dec-10 23:43

8-Dec-10 23:43

Hi,
I am unable to reload the designer for a .xaml page.
I get the error:
An unhandled Exception has occured.
System.InvalidOperationException
An unhandled exception was encountered while trying to render the current silverlight project on the design surface. To diagnose this failure, please try to run the project in a regular browser using the silverlight developer runtime.

Further down the error message it says:
System.InvalidCastException
Unable to cast object of type 'System.Windows.Controls.Canvas' to type 'myprojectname.Silverlight.MainPage'.

Any thoughts please?
Thanks

Re: designer .xaml error

Vimalsoft(Pty) Ltd9-Dec-10 4:19

Vimalsoft(Pty) Ltd

9-Dec-10 4:19

let us see you xaml

Vuyiswa Maseko,

Spoted in Daniweb-- Sorry to rant. I hate websites. They are just wierd. They don't behave like normal code.

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.com
vuyiswa@its.co.za
http://www.itsabacus.co.za/itsabacus/

error in xaml resource

arkiboys8-Dec-10 21:46

arkiboys

8-Dec-10 21:46

Hi,
In xaml, There is an underline on {TemplateBinding Content} in the following script:
The error is: Property 'Content' was not found in type 'Control'
Do y ou see why?
Note that I can compile but not sure why I get this underline.
Any thoughts please?
Thanks

<UserControl.Resources>
...
...
...
<ControlTemplate x:Key="ToolTipTemplate">
<Border BorderBrush="red" BorderThickness="5" CornerRadius="1" Background="blue">
<ContentPresenter Grid.Column="3"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
Margin="1,1,1,1"/>
</Border>
</ControlTemplate>
</UserControl.Resources>

Re: error in xaml resource

Abhinav S8-Dec-10 22:01

Abhinav S

8-Dec-10 22:01

This happens all the while to me. If this code works when you run it, you are good to go.

Just as a note, in Silverlight 4, the XAML parser has been upgraded and this is one of the effects of this upgrade.

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Page Reload issue

Santhosh Sebastian Mattathil8-Dec-10 21:29

Santhosh Sebastian Mattathil

8-Dec-10 21:29

I want to reload the same page when the user clicks on the same link again.

As said in some forums I tried NavigationService.Refresh but it says Refresh is not available in NavigationService.

Iam using Sl4.
Anyhelp will be appreciated.

Thanks
Santhosh

Santhosh

Re: Page Reload issue

RobCroll10-Dec-10 1:40

RobCroll

10-Dec-10 1:40

There are a number of ways to skin this cat. I don't know if this is best practise but one of the simpler ways is to create a static property that is a pointer to the page. If null open as normal with the constructor setting the static property. If not null then call a method within the page (ie. RefreshPage) which will do the work to refresh the page as required.

Re: Page Reload issue

Santhosh Sebastian Mattathil12-Dec-10 19:05

Santhosh Sebastian Mattathil

12-Dec-10 19:05

Thanks Robert for the reply

But how do we refresh it (I mean the code)..

Santhosh

Re: Page Reload issue

RobCroll14-Dec-10 12:07

RobCroll

14-Dec-10 12:07

Well assuming the page is already displayed, by refreshing I mean applying some UI logic, displaying/hiding/enabling/disabling controls, requesting and displaying data, that sort of thing.

version 3 to 4

arkiboys8-Dec-10 21:28

arkiboys

8-Dec-10 21:28

I am in th eprocess of changing a silverlight 3 application to silverlight 4.
Is it necessary to check the references in the silverlight app. so that if any refers to version 3 then change to version 4 references?

Thanks

Re: version 3 to 4

Abhinav S8-Dec-10 21:59

Abhinav S

8-Dec-10 21:59

arkiboys wrote:
silverlight app. so that if any refers to version 3 then change to version 4 references?

Yes. Else those items will still be pointing to Silverlight 3 and your code will propably not build somewhere.

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Re: version 3 to 4

arkiboys8-Dec-10 22:02

arkiboys

8-Dec-10 22:02

Ok.
Solved.
Thanks

Re: version 3 to 4

Abhinav S8-Dec-10 23:18

Abhinav S

8-Dec-10 23:18

You can always 'mark the answer as accepted'.
Wink | ;)

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calling webservice error

arkiboys8-Dec-10 2:38

arkiboys

8-Dec-10 2:38

Hi,
I am running a silverlight 4 application which is using web services.
The folowing error occurs when trying to create an instance of the web service.
Can you see why this is occuring please?

Error:

xxxServiceClient _xxClient = new xxxServiceClient();

The invocation of the constructor on type 'xx.xxx.Silverlight.xxxx.somename.somenameData' that matches the specified binding constraints threw an exception. [Line: 13 Position: 41]

Any thought please?
Thanks

Re: calling webservice error

Abhinav S8-Dec-10 19:28

Abhinav S

8-Dec-10 19:28

Make sure everything is in order in the serviceRefrences.clientconfig file.

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Re: calling webservice error

arkiboys8-Dec-10 21:06

arkiboys

8-Dec-10 21:06

Solved.

target silverlight version

arkiboys8-Dec-10 0:01

arkiboys

8-Dec-10 0:01

Hi,
Under the target silverlight version I see silverlight 3.
How can I get silverlight 4 to appear in there as I am running vs2010 and silverlight 4 ?
Thanks

debug silverlight

arkiboys7-Dec-10 23:28

arkiboys

7-Dec-10 23:28

Hi,
I am using .net 4 visual studio 2010 premium.
I have been given a silverlight project to work on which was created in silverlight 3.
I can run the application but can not debug it.
The properties of the application shows that the target silverlight version is set to silverlight 3 and this is the only option available.
Note that I have installed silverlight 4.
And in the web.config of the host, the following line is indeed present
<compilation debug="true">

Question:
How can I debug the application based on the above please?
Thanks

Re: debug silverlight

Vimalsoft(Pty) Ltd9-Dec-10 4:21

Vimalsoft(Pty) Ltd

9-Dec-10 4:21

So when you place a break point on the Code behind it does not go ?

Re: debug silverlight

arkiboys9-Dec-10 4:36

arkiboys

9-Dec-10 4:36

All ok.
Wrong post.
Sorry

Expander Control

eddieangel7-Dec-10 10:48

eddieangel

7-Dec-10 10:48

I want to use an expander control to contain a shadowbox style filter user control. So the basic idea is to make the expander button look like a filter button, and upon pressing a grid with some controls in it will appear in the center of the current window while the rest of the window is overlaid with a semi-transparent grid.

All the code for this is easy enough, but I am having trouble with expanded width of the expander vs. collapsed width. I want something along these lines:

<Style
		x:Key="sbExpander"
		TargetType="{x:Type Expander}">
		<Style.Triggers>
			<Trigger
				Property="IsExpanded"
				Value="True">
				<Setter
					Property="Background"
					Value="Black" />
				<Setter
					Property="Opacity"
					Value=".8" />
                <Setter
                    Property="Width"
                    Value="760" />
                <Setter
                    Property="Height"
                    Value="760" />
            </Trigger>
		</Style.Triggers>
	</Style>

The expander control:

<Expander
                Grid.Row="0"
                Grid.Column="0"
                Grid.RowSpan="10"
                Grid.ColumnSpan="4"
                IsExpanded="False"
                HorizontalAlignment="Left"
                Width="20"
                ExpandDirection="Right"
                Style="{StaticResource sbExpander}">
                <Grid
                    Width="760"
                    Background="Black"
                    Opacity=".8">
                </Grid>
            </Expander>

The issue is that if the initial width of the expander is anything greater than 20 it overlays the rest of my controls and renders them unusable. I only want them unusable when the expander is expanded. So I really do want the collapsed expander control width to be 20 so that the controls under are available, while I want the expanded width to be 760 covering the entire window.

Thoughts?

Cheers, --EA

Re: Expander Control

eddieangel7-Dec-10 12:26

eddieangel

7-Dec-10 12:26

Ok, I figured it out. Put the expander inside a stackpanel whose width property was set to auto.

Cheers, --EA

dll error

arkiboys7-Dec-10 5:11

arkiboys

7-Dec-10 5:11

Hi,
I am running visual studio 2010 premium with silverlight toolkit 4.
The project does not build and in references, the following dlls have yellow exclamation next to them:
1- Microsoft.Expression.Interactions
2- System.Windows.Interactivity

How can I solve these please?
Thanks

Re: dll error

Praveen Raghuvanshi7-Dec-10 21:31

Praveen Raghuvanshi

7-Dec-10 21:31

I am much into WPF development. Still, gave a shot to your problem.
It seems that you are using some elements of Expression blend.
I believe you need to install the Expression blend SDK.

Here are the links that might be useful.

http://www.global-webnet.net/blogengine/post/2009/07/21/Where-is-MicrosoftExpressionInteractions.aspx[^]

http://social.msdn.microsoft.com/Forums/en/wpf/thread/76612bb7-28b5-4605-b850-3817ded55ac1[^]

http://forums.esri.com/Thread.asp?c=158&f=2455&t=302579[^]

Hope it helps!

Praveen Raghuvanshi
Software Engineer,

India.

Re: dll error

Abhinav S7-Dec-10 21:45

Abhinav S

7-Dec-10 21:45

This [^] might help.

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Full screen aplication, how to make views?

sxill6-Dec-10 9:46

sxill

6-Dec-10 9:46

Hi!
I am making a full screen WPF application. Please tell me what is right way to make full screen application in one window. How to change screens/views? All views as custom controls? Or just hide elements or create them dynamically? I couldn't find the answer.
Thanks.
SXILL

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