Questions on UI for WPF Forum

4 answers

136 views

GridView throws design time error after solution is upgraded to VS2010

I have a gridview in a window that displays/loads fine, in design view, for a VS 2008 solution. i have upgraded the solution to VS 2010 and now receive the error below when in design view (still runs without error, just design time error).

System.NullReferenceException

Object reference not set to an instance of an object.

at Telerik.Windows.Controls.GridView.GridViewItemsControl.DisconnectFromDataEvents() in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\GridViewItemsControl.cs:line 824 at Telerik.Windows.Controls.GridView.GridViewItemsControl.GridViewItemsControl_Loaded(Object sender, RoutedEventArgs e) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\GridViewItemsControl.cs:line 548 at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) at System.Windows.BroadcastEventHelper.BroadcastEvent(DependencyObject root, RoutedEvent routedEvent) at System.Windows.BroadcastEventHelper.BroadcastLoadedEvent(Object root) at MS.Internal.LoadedOrUnloadedOperation.DoWork() at System.Windows.Media.MediaContext.FireLoadedPendingCallbacks() at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks() at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.AnimatedRenderMessageHandler(Object resizedCompositionTarget) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

GridView

answered on 28 May 2010

2 answers

417 views

Binding the Header property of a GridViewColumn

Hi,

I need to do something like the following :

<r:GridViewColumn Header="{Binding Path=Whatever}">

<r:GridViewColumn.CellTemplate>

</DataTemplate>

</r:GridViewColumn.CellTemplate>

</r:GridViewColumn>

It doesn't work. There's no binding error displayed to the Output Window (normally, all binding errors are displayed there). The header is just plain empty in my grid. Before you tell me that the property may not exist, I must add that I also tried {Binding .} (or {Binding Path=.} if you prefer); at least, it should display the ToString value of the current DataContext, whatever it is, but again, nothing is displayed.

Thanks in advance

GridView

answered on 27 May 2010

1 answer

138 views

unresizable window

sorry, maybe it's a stupid question, but how can I make a window unresizable?

Window

answered on 27 May 2010

3 answers

116 views

can i post now ?

Could it be, that beside me being stupid and not having a clue about wpf/silverlight, you guys duplicated the RadMap Tutorial for Silverlight and used it for RadMap WPF, and I tried to apply the silverlight tutorial to the wpf application and therefore get the error below ?

http://www.telerik.com/help/silverlight/map-create-basic-application-bing-maps.html

http://www.telerik.com/help/wpf/map-create-basic-application-bing-maps.html

?
----------------------------------------------------------------------
can i post now ?

sorry, but I got an error message when trying to reply to my previous thread. So, again ... I want to use RadControls for WPF. I have Visual Studio 2008 SP1 installed and the Telerik WPF Q1 2010. Telerik shows up fine in my Visual Studio Toolbar, the sample files are there and show up.

Now, when I try to follow the tutorial for RadMap ...

"

1. Open Visual Studio 2008.

2. Select File the main menu.

3. Select New, and then Project from the menu.

4. In the New Project dialog box, under the language of your choice (for example, Visual C#), select Silverlight.

"

I previously did not had the option "Silverlight" ... I installed Silverlight Tools and Silverlight SDK, then I got the option to choose Visual C# and Silverlight.

Next Step ...

"

Display a Map

Next, reference the map control in your project and display the default map in your application.

1. With the Silverlight project selected (not the Web project), select Project then Add Reference from the Visual Studio main menu.

2. In the Add Reference dialog box, click the Browse tab.
3. Browse to the location of your RadMap control installation, select the Telerik.Windows.Controls.DataVisualization.dll file and click OK.

"
When I try to add the Reference, I browse for the "Telerik.Windows.Controls.DataVisualization.dll" in the RadControls for WPF Q1 2010/Binaries/WPF/ ... Folder. When I try to add the .dll I get ...

"You can´t add a refernece to Telerik.Window.Controls.DataVisualistion.dll as it was not built against Silverlight runtime. Silverlight projects will only work with Silverlight assemblies"

So, that´s so far killing my attempt to follow the turial and use the wpf telerik RadMap component.

Help ?

Thanks d.

General Discussions

answered on 27 May 2010

4 answers

213 views

Maintain Item Selection for subitems

Hello again,

To keep this post fairly short I will reference the great code you have provided from http://www.telerik.com/community/forums/wpf/treeview/select-entire-row-and-remove-expand-buttons.aspx

I would like the SelectionVisual Border to stay highlighted on the main tree item if a user goes deeper into the tree. I am also trying to change the foreground color of the item if selected.

I was thinking that I needed to have a ItemContainerStyle for each HierarchicalDataTemplate "layer" in the treeview to achieve the desired result. Is this the best way?

I am including a reference picture to better illustrate what I am talking about. I have already done the expander.

Treeview Image

Thanks again,

Your controls and help save us lots of time :)

Ryan

TreeView

answered on 27 May 2010

3 answers

264 views

Setting datatype of column with code behind

I'm trying to set the data type of one of my columns with code behind using the following code but it is erroring

Can anyone explain what i'm doing wrong?

column.DataType = typeof(DateTime);

GridView

answered on 27 May 2010

6 answers

194 views

hierarchy relations and column line-up

I have some objects displaying in the grid with some detail archive objects that the users want to see. How do I get the columns in the detail table to line up(be directly under) the same columns in the master table?

GridView

answered on 26 May 2010

7 answers

99 views

Memory usage when sorting

Why does the memory usage keep increasing if you click the header and sortt he same column desc and asc multiple times?

Thanks!

May

GridView

answered on 26 May 2010

3 answers

218 views

Turning off text wrapping on a grid column

Hi,

I am currently binding a radgrid to an object in which one of the properties can have a large amount of free text, which causes the text to wrap and the row height to expand to accomodate it. I really want to have the text go to ellipses (e.g. 'mary had a little...') when it runs out of room, but I cannot seem to get it to work. How can I do this for one or more columns?

GridView

answered on 26 May 2010

1 answer

106 views

Is possible datasource = tableadapter with no code?

Hi, is it possible to use a table adapter as the datasource or itemssource without coding? If not, what would be the easiest and quickest way to connec the chart to a dataset/adapter?

sorry my english...

Thanks!

Chart

answered on 26 May 2010