Hi,

I am using the ValueChanged event to detect changes in the grid that contains Checkboxes and I assign true to a variable which I use later to ask if it is true. But if with a second click I return to its previous value, the value has not really changed. How do I detect if something has really changed in the grid?

This is my code:

        private void rgvPerfiles_ValueChanged(object sender, EventArgs e)
        {                                                                         
            if (this.rgvPerfiles.ActiveEditor is RadCheckBoxEditor)
            {
                hayCambiosPendientes = true;
            }
        }

Best regards.

Hello

I started a Winforms .net 3.1 project. All Telerik components are not visible in the Toolbox. When I try adding them (Right-clink in General, Chose-items, etc.) I can see all the Telerik components, checked, and when I uncheck-recheck a few nothing happens. The Telerik menu is visible and active in the Extensions menu. 

Also all forms (in designer mode) show this error: "The designer could not be shown for this file because none of the classes within it can be designed. The designer inspected the following classes in the file: The designer could not be shown for this file because none of the classes within it can be designed. The designer inspected the following classes in the file: \r\n NewEmailForm --- The base class 'Telerik.WinControls.UI.RadForm' could not be loaded. Ensure the assembly has been referenced and that all projects have been built." Even though the project is cleaned and rebuild multiple times. When run in dbeug mode, all runs fine without errors. The designer for any form is just not usable.

When trying to add a new RadForm i get and error about "Scenario wizard cannot be launched..." (see attached). I am thinking it cannot load the assembly files, yet everything runs fine when debugging and part of VS2019 seem to be aware of installation.

This only happens in a .NET Core (3.1) project. If I do the same on a .NET Framework project all works well.

Here are my versions:

- Microsoft Visual Studio Enterprise 2019 / Version 16.6.4
- Microsoft Windows 10 Enterprise / Version 10.0.1.18363 Build 18363
- Telerik UI for Winforms 2020.1.218.310

Thanks

Herald

Hello,

I have searched but not found any solution to somehow make the horizontal line for the full hour in scheduler.
Please see the attached image. I'm struggling to put words on this ;)

Any help or suggestions are appreciated.

Thank you!

Hello,

is it possible to change initial directory of open image dialog in image editor? I tried to set current directory by Directory.SetCurrentDirectory, but it seems it uses always some last opened directory.

Greetings,

Supposing that a Radgridview has 4 columns and the second one is the current column (our target).

Is it possible to change backcolor of not all the rows of the current column, but only the header cell of the color  ? As if the column is highlighted or selected

I attached a picture

I have grid with four columns. On load, I'm getting the data from a single table to populate the columns in the grid. Imagine a data with a column for uniqueID, text, text, numbers and numbers. I'm loading just the last for as visible.

I want the user to have the ability to edit the first two columns. This data actually comes from another table. There may be five choices for the user to select.

I'm looking everywhere for en event and I cannot find where I can edit the data source for the combobox columns. I'm completely stumped as to how I can populate the drop down boxes with valid data for the user to select.

Hello

In a treeview drag drop operation I need to get a users validation before proceeding with the actual drop operation.

In the example DragDropTreeViewsVBNET provided in a previous post
I have added a messagebox at the beginning of the drop operation in order to decide if I proceed or not
However this "hangs" the application. I suspect that the drop operation operates in a different thread that
prevents me from opening a messagebox.
I have tried to find a way to achieve this but have failed.
Have you a suggestion ? (I understand this is not a Telerik issue but I would appreciate any suggestion)

Thanks in advance

Pierre-Jean

• Convert to Telerik WinForms Applications
• Configure Project
• Upgrade Wizard

I get the dialog with the available Components and Themes, but, when I click Finish, I receive an error that says:

Error executing custom action 
Telerik.WinControls.VSX.Actions.UpdateReferencesAction: Object reference not set to an instance of an object.

I do not receive this error if I remove all COM, Project, and external dll references from that project prior to launching the dialog.  Is this expected?  The Radcontrols work fine as long as I add the references manually or let VS do the work by dragging the control from the toolbox.  For the record, I'm a brand new user so I can't say if this worked with previous versions.

Thanks!

The properties set at design time are not saved.

version : 2019.2.618.40

I am having problems understanding how to use this control.   I have already created a form without it, but I can start all over, no problem.  I just find it confusing how to lay it out.    I have attached a screen shot of what I want in the layout control.  Perhaps a short video demonstrating on how to partially construct this layout.