Hi,

I'm testing out this library and I'm getting the following error:
No method 'Average' on type 'System.Linq.Enumerable' is compatible with the supplied arguments.

I'm doing a very simple test. Here is the relevant code:


When m_Data has more then 397 elements it throws that error. Before that number it looks pretty.

Any help will be greatly appreciated.
- Luis

Is it possible to show a value that is not part of the ItemsSource of the combobox? My observablecollection contains 1,2,3,4, but the value I have assigned to the databound field is 10.

Below is my current column setup.


WeldID contains the value 24, but the ItemsSource I bind to the combobox contains the values 1,2,3,4. When I load the grid, 24 is not displayed in the column, but if I add the value 24 as one of the dropdown options, it gets displayed in the column.

Any help would be much appreciated!

Ryan

Hi,

Instead of the more usual technical question, this post is related to functional requirements, and choosing among different implementations. I hope I can keep it as short as possible, not too philosophical, and of course, raise interest/curiosity among some of you ;-)

We are currently building a Framework in order to ease and speed up the development of certain kind of applications. We have decided to create a custom control library (using telerik as base) that must fulfill the following requirementes:

1.- Provide just the properties/events (Controls) that we consider necessary. --hiding attributes--
2.- Extend the base controls in order to add extra functionallity. --creating new attributes--
3.- Ease the implementation of our interfaces. By dragging a control from the VisualStudio (or Blend) designer toolbox to the window/page/usercontrol/etc, the developer will have most of the necessary attributes (see req. 1) with the proper default values.
4.- The controls must support all the standard (graphic) features of WPF: Styling, Control Templates, Storyboards, etc.
5.- The controls must support standard event handling, although we might use a fancier action/commanding approach (like the ones implemented by Prism, or Caliburn)
6.- DataBindings.

After some research, we came up with three solutions (summarized, as I'm trying to keep this as short as possible):

A) Wrapping the control: using Control as base class, we add the telerik control as the first (and only) visual child. Then we create a DependencyProperty for each DP we want to expose from the telerik control.
(its much more elaborated, and I didn't copy all the code, but you get the basic idea)

B) Control templating: using Control as base class, we redefine the default styles of each control. The template (ControlTemplate) property is assigned to the telerik control. Then we create a TemplateBinding (or complete Binding, depends...) for each DP we want to expose. The DP is also created in the Control: (again, its much more elaborated)

C) Directly inheriting the telerik control. (we loose the req. 1, hiding attributes)


In summary:
- Solution A (wrapper) is somehow ugly, and uses a lot of tricks in order to do things such as:
    - Creating data bindings (from XAML)
    - Using CustomTemplates (from the final developer point of view)
    - Create data bindings from code behind.

- Solution B is more elegant (they are pretty much the same thing, as they generate the same logical tree for each control), but I'm not sure how difficult it will be to wrap complex controls, such as the GridView, Ribbon, etc.

- Solution C basically breaks with one of the initial requirements, but its still a valid approach. Besides, you can somehow suggest what properties to use by implementing the Extensibility Model for the WPF Designer.

My questions are:

    * What is the best approach, given the scenario I exposed?
    * Any other ideas/suggestions?


By the way, we need to provide the same control libraries for Silverlight and ASP.net, and it would be nice to use the same approach, at least with WPF and SL.

Thanks,


--
R.

I am using a GridView with RowDetails.
I have a GridViewSelectcolumn.
Now whenever I select a row( check the checkbox) the rowdetails is expanded.
I do not want the row details to expand when the checkbox is checked. It should only expand/collapse through GridViewToggleRowDetailsColumn +/-

How to achieve such functionality>

I wish to filter data in a gridview upon clicking a button.
I do not want to include filtering under header column row.

P.S. I got it working

I am running into an issue when using the Gridview. I have a Gridview which has the columns defined declaratively in the xaml. There are several controls such as buttons, checkboxes, etc... in the column definitions. I use the GridViewColumns as illustrated below:

Hello,

Hi.

When you add a comment to a cell in MS Excel, you get a red triangle in the right top corner of the cell.
I would like to do the same on my grid. I have added the tooltip to the cell, but I would like the indicator that there is a comment on the cell.

Any ideas?

Just wanted to let you know that placing RadRibbonBar from Q2 beta build into WPF window, adding two rad buttons into application menu and adding one tab not working - running application throws Object null reference exception.

Regards,
Saulius

How to call a function on each item of the selecteditems in DataGridView

P.S. NVM got it working