I have what I hope is a simple problem.   I have a simple WinForms application in which I'm providing a generic ObservableCollection<> of a simple public business object type as a data source for a RadGridView (version Winforms 2011_1_11_419), .  

For whatever reason, i cannot get it to auto-sort by clicking on the column headers.  (My understanding after reading the Help is that this should be automatic if the "GridView.EnableSorting" and "GridView.MasterTemplate.EnableSorting" properties are both true).   I do have AutoGenerateColumns also set to True, since the business object is still evolving and gaining/adding/changing properties in between builds..

I've tried setting the grid's DataSource property directly to the ObservableCollection<MyObjectType>.  I've tried creating an intermediate BindingSource and setting the grid's DataSource to that.   I've tried creating several SortDescriptors for the columns on which I most need to sort.   I've tried removing all such SortDescriptors.   I've tried creating a custom SortableObservableCollection (which works in binding in WPF) instead of the ObservableCollection.   Etc. 

The data always displays correctly in the GridView; but doesn't sort or show sort direction indicators in the column headers.

There has to be something simple I'm missing.

Thanks!
-Bob

from
Demo Application - RadControls for WinForms.
Gridview -> Custom Painting.

I want to move the drawing image in grid view.
- change cursor on mouse over
- drag and drop drawing
- show image moving 

please help me...

Hello,

We currently trying the controls and encountered some bugs..
On the form load event, when setting image list to the toolbar and imagekey to a specific menu button some of the buttons does not get refresh and some do..

Is there a way to force refresh to all the buttons after changing the image key?

Thank you

With RadControls 2008 Release 3 1204 (control version 8.1.0.0) I'm facing the following issue:

I handle the ValueChanging and ValueChanged events of a GridViewComboBoxColumn in a data bound GridView control. I set e.Cancel=true in the ValueChanging event handler to prevent modification of the cell value. I would expect not to receive the ValueChanged event in this case - but I'm wrong: The event will be fired although I requested to cancel the changes. Is this intended?

The second thing I don't understand is: why are the Changing / Changed events actually fired even if the cell value did not change at all?

Assume the following scenario: As I said above I have a data bound GridView with an also data bound GridViewComboBoxColumn. I drop down a cell's editor and select the entry with the same value as the cell already contains. The Changing / Changed events will be fired. Even worse, the bound data source (in my case a DataSet/DataTable) will also be changed and contains changed data rows after this - but all values of the row are obviously the same as before.

Now I could at least try to compare the old and new values of the cell manually and cancel the editing if I find that they are equal - but this won't work because of the behaviour described on top.

So could tell my if this is a bug - or at least how I can cancel the cell editing and - more important - the modification of the bound data source?

Regards,
ReneMT

In the new version of the WinForms controls (2013.3.1016.40) opening a context menu will cause the form to loose focus and flash.

This also makes the context menu not close all the time on the first click away form the menu since the form regains focus on the first click and then registers the click away on the second click.

This seems to be happening on all controls even when using the default context menu like in the grid view.

1. Click on a combo property to start edit
2. Move mouse over vertical center dividing line to get mouse to transition to resize pointer
3. Move moue to the right back over the combo box that has been activated for edit
4. The mouse pointer will not transition back to the arrow, it will stay on the resize pointer

I have attached an image of this.

#1
How can I configure radDateTimePicker to allow any type of input so I can parse the input into a valid date (or set to null if invalid)?

Examples:

- Users want to be able to key in 7 (today's day part) and have the date parsing assume current month and year => 08/07/2013;

- Key in 9/7 ... date parsing will assume current year => 09/07/2013;

I will write the parsing rules ... but how can I configure the control to accept text only ... without the '/' and without trying to format as a date while the user is typing?


#2
How can I make the control (and all other Telerik controls) look like the rest of the controls on my form?  I am using Win7 ... but others may be on Win8 or Vista.

#3
How can I make the control not nullable - so a date must be entered?

Hello,

I have a solution (see example below) how to use RadMultiColumnComboBox auto filter and it's EditorControl's column filters enabled at the same time. Howewer, there is a problem and I'd be glad if you have any solution.

I've attached a picture of working and non working example of filtering.

Filtering as shown on page http://www.telerik.com/help/winforms/multicolumncombobox-filtering.html is not enaugh for what I am trying to do.
My goal is to have RadMultiColumnComboBox auto filtering and also it's EditorControl columns filtering enabled at the same time.
This example shows how to solve this. But it only works when manipulating with short strings in the RadMultiColumnCombobox's DataSource (which is DataTable). 
But as soon as longer string is placed inside DataTable, strange problem accures. 
Try two things:
1.) Run the program. Click on the RadMultiColumnComboBox. Popup with RadGridView accures automatically. Now click on the LastName filter. Enter character 0. Filtering works for now.
2.) Now erase this character and enter another one - z. There is no last name that contains letter z, true... but that should not crach the application. The application crashes. Why? If you shorten the first name in the first row and run the application again, this doesn't happen.

Below there is a Form1.vb with all the code needed. In designer I only have one RadMulticolumnComboBox1 control, placed on Form1.

Hello all,

link manager dialog displays with radtoolbar reappear above modal overlay when user clicks all properties button on insert link dialog
need to prevent users click any editor tools.
navigated code but I could not find any triggers that.
I am just assuming CSS issues.

Thank you

Hi Telerik Team,

I have a problem with multi-column gridview printing. When I try to print a big radgridview e.g 100 rows and 50 columns everything is OK in vertical state because when is no space for rows on one page the rest is printing on another one. The problem is when there is no space for columns, then there are not moved on another page but cutted. So then I have e.g. only 30 columns instead of 50. Is there any possibility to print all of them to obtained view of whole gridview or this function is not available? It would be great if for example first column of gridview which is common to rest would be visible on each page where columns, which can't fit to the first page, were moved.

Best regards
Krystian