force radcombobox to always expand upwards

[Delvis]

Hello, 

I need to open RadMulticolumnCombobox in upwards direction. I am using Telerik for WinForm.

Otherwise, he would wish that while one types to filter this do not open up (AutoFilter = true)

Any idea?

[Paul]

Hello Delvis,

Thank you for writing.

To set the location of the popup window you can subscribe to the PopupOpening event and use the CustomLocation property. Here is a small code snippet which will give you the basic idea.

void MultiColumnPopupForm_PopupOpening(object sender, CancelEventArgs args)
        {
            Point mccbScreenLocation = this.PointToScreen(radMultiColumnComboBox1.Location);
            mccbScreenLocation.Y = mccbScreenLocation.Y - radMultiColumnComboBox1.MultiColumnComboBoxElement.MultiColumnPopupForm.Height;
            ((RadPopupOpeningEventArgs)args).CustomLocation = mccbScreenLocation;
        }

I am also attaching a sample project to show you everything in action.

Hope that helps.

Greetings,
Nikolay Aleksiev
the Telerik team

[Delvis]

Hi Nikolay Aleksiev, that's just what I need, thank you very much.

[Delvis]

Hello Nikolay,

The supplied solution solves my problem in part because I need to adjust the position on filter.

I have the following properties:

AutoFilter = true

AutoSizeDropDownToBestFit = true

AutoSizeDropDownHeight = true

or not showing the popup on filter, only on demand

Excuse my English

Thank you very much for answering

[Paul]

Hi Delvis,

Thank you for writing back.

I am not sure that I understand that precise scenario you are after. Could you please elaborate on it so I can understand what is the exact requirement and help you achieve it if possible?

Kind regards,
Nikolay Aleksiev
the Telerik team

[Delvis]

Hello Nikolay,

Thank you for your answer.

In the example supplied, if we add a FilterDescriptor:

var filterDescriptor1 = new Telerik.WinControls.Data.FilterDescriptor { PropertyName = "ContactName" };

radMultiColumnComboBox1.EditorControl.MasterTemplate.FilterDescriptors.Add(filterDescriptor1);

We obtain a non-desired effect when we type. Attachment images.

I need to keep on adjusting the new position while filter.

Thanked,

Delvis

[Paul]

Hi Delvis,

Thank you for the screenshots and the explanation.

You have no choice but to adjust the popup form location every time it changes its size. For this purpose you will have to subscribe for the following event:

radMultiColumnComboBox1.MultiColumnComboBoxElement.EditorControl.FilterChanged += EditorControl_FilterChanged;

This should do the work. I am attaching a sample project to show you everything in action.

Hope you will find it helpful.

Regards,
Paul
the Telerik team