designer .xaml error - WPF Discussion Boards

Mycroft Holmes9-Dec-10 23:54

Mycroft Holmes

9-Dec-10 23:54

A slightly more detailed response with the same concept that JSOP offered.

Set a bool (bLoading) in the constructor of the view
in the event check for the bool setting and ignore if bLoading == true
set bLoading to false at the end of the constructor.

Caveat I do this in winforms and assume it works in SL, I have not yet needed it in SL

Never underestimate the power of human stupidity
RAH

arkiboys10-Dec-10 1:29

10-Dec-10 1:29

That will not work because the onstructor only gets called once.

Mycroft Holmes10-Dec-10 12:05

Mycroft Holmes

10-Dec-10 12:05

Then you need to locate the method that populates the grid, probably the onchange event on your list and use the same logic.

Never underestimate the power of human stupidity
RAH

arkiboys10-Dec-10 22:26

datagrid issue [modified]

10-Dec-10 22:26

The section which populate sthe grid is in the load events.
Please look at my earlier post to see the code events I am using.
Still having t he same problems...

arkiboys9-Dec-10 3:13

image control - dynamic load image from the resource file

9-Dec-10 3:13

I am working on an existing silverlight 4 application.
main page is MainPage.xaml
This page has a main datagrid i.e. datagrid1 and another datagrid i.e. datagrid2 which is inside the datagrid1.

When the application is run, the datagrid1 is populated with data.
Everytime you click on a row in datagrid1, then the datagrid2 is shown and is loaded with data.

Problems is everytime the datagrid1 is loaded, i.e. when th emainpage.xaml is run, then datagrid2 gets shown in the first row of datagrid1.
How can I stop the datagrid2 being shown when the mainpage.xaml is loaded?

I think somehow I have to get the -= and += code to work. You see them above where they are commented because they do not compile.

Any thoughts please?

for datagrid1 I am using the following events with codes inside them:

private void datagrid1_Loaded(object sender, RoutedEventArgs e)
{
//this.datagrid1.SelectionChanged -= new EventHandler(this.datagrid1_SelectionChanged);
this.DataContext = ((MainPage)(Application.Current.RootVisual)).GetData;
//this.datagrid1.SelectionChanged -= new EventHandler(this.datagrid1_SelectionChanged);
}

private void datagrid1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (datagrid1.RowDetailsVisibilityMode == DataGridRowDetailsVisibilityMode.Collapsed && e.RemovedItems.Count == 1)
datagrid1.RowDetailsVisibilityMode = DataGridRowDetailsVisibilityMode.VisibleWhenSelected;
}

private void datagrid_RowDetailsVisibilityChanged(object sender, DataGridRowDetailsEventArgs e)
{
if (e.Row.DetailsVisibility == Visibility.Collapsed) return;

if (e.Row.DataContext is myservice.myData)
{
//retrieve data

}
}

Thanks

modified on Thursday, December 9, 2010 9:49 AM

Yanshof9-Dec-10 2:27

Yanshof

9-Dec-10 2:27

I create in the code some image control and i want to set on this image control some of the picture that i saved ( load those pictures before creating the image control )

How can i do it ?

Re: image control - dynamic load image from the resource file

Praveen Raghuvanshi9-Dec-10 3:15

Praveen Raghuvanshi

9-Dec-10 3:15

Try this

http://www.comanswer.com/question/dynamic-loading-of-images-in-wpf[^]

Hope this helps!

Praveen Raghuvanshi
Software Engineer,

India.

designer .xaml error

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

Re: error in xaml resource

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>

Abhinav S8-Dec-10 22:01

Santhosh Sebastian Mattathil

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.

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Visit the Hindi forum here.

Page Reload issue

Santhosh Sebastian Mattathil8-Dec-10 21:29

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

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

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.

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Visit the Hindi forum here.

Re: version 3 to 4

arkiboys8-Dec-10 22:02

8-Dec-10 22:02

Ok.
Solved.
Thanks

Re: version 3 to 4

Abhinav S8-Dec-10 23:18

8-Dec-10 23:18

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

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Visit the Hindi forum here.

calling webservice error

arkiboys8-Dec-10 2:38

Re: calling webservice error

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

Abhinav S8-Dec-10 19:28

Re: calling webservice error

8-Dec-10 19:28

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

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Visit the Hindi forum here.

arkiboys8-Dec-10 21:06

target silverlight version

8-Dec-10 21:06

Solved.

arkiboys8-Dec-10 0:01

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