Questions on UI for WinForms Forum

17 answers

1.2K+ views

Hi,

I need something similar to your Silverlight/WPF RadSlider but for WinForms..

Is it possible to have multiple sliders on your WinForms RadTrackBar or do I need to put a wrapper around your WPF Slider?

Thanks,
Brad

TrackBar

answered on 31 Jul 2017

0 answers

145 views

Event CellFormatting in GridView not firing

I'm using GridView in Telerik 2017.2

CellFormatting event doesn't firing when my GridView is Updating:

myGrid.TableElement.Update(GridUINotifyAction.StateChanged);

when i'm changing my DataSource:

myGrid.DataSource = currentRaces;

but RowFormatting is firing on this events. What can i do? I need to change color of my cells!

GridView

asked on 31 Jul 2017

0 answers

99 views

Sum Childs of Child Row

Hi,

I have a gridview with a child template (X) and another template (Y) into the child template (X) and have a decimal column in (Y).

I want to SUM the decimal column in (Y) into a cell of parent row in (X).

Thanks,,,

GridView

asked on 29 Jul 2017

4 answers

128 views

detecting when Treeview repopulates itself when bound

The article here shows how to save state, but it fires them on manual changes, I am trying to detect when this repopulation is going to happen, I have other events unrelated to the UI that are changing the state of the object the treeview is bound to. and would like to be able to detect when that happens.

http://docs.telerik.com/devtools/winforms/treeview/how-to/keep-radtreeview-states-on-reset

the overarching goal here, is to prevent the tree expanded state from resetting when the tree bound data is updated off the control.

Treeview

answered on 28 Jul 2017

0 answers

116 views

Multiple Selection Value

Hello
Why is there an empty txt in the selection of items?

MultiColumn ComboBox

asked on 27 Jul 2017

7 answers

196 views

Negative parent ID on nodes

I have a treeview bound to a binding list, and I have noticed that when I add items to the binding list with a negative number (other than -1) as the parent ID, the treeview control clears out and shows just that node. Does anyone know why this might be happening? Thanks!

Treeview

answered on 27 Jul 2017

1 answer

118 views

multiple panoramas in a form

If have a panorama on a form

have groups in them with sections like

Actions

-->tileCustomers

-->tileSuppliers

...

Settings

Maintenance

...

And a panorama2 called

having a group called Actions containing tiles of

Add customer / edit customer etc.

want to show() when someone clicks on tile of () panorama.

like a simple show/hide forms.

if hide() panorama1 and show() it work as soon as hide panorama1 all is hidden.

Is there a simpler way of doing

basically trying to make a tile menu system where each menu has multiple sub menus, but not show all at once.

Panorama

answered on 27 Jul 2017

9 answers

504 views

Different cell type

Hi i need this add new column which by set by another column for example

id text value new column
1 test1 yes combobox
2 test2 no button

so for one row is new column radcombobox ane for second row radbutton.
thx for help.

GridView

answered on 27 Jul 2017

5 answers

373 views

GridCellElement reference not set to an instance of an object

Hi,

I work with radGridView and color some cells according to the option set by user. So I created a function to color/uncolor cell of the grid. Bellow the fonction to reset the color of the (second columns of the) grid :

private bool ResetCellsColor(RadGridView radGridView)

{

Boolean ret = true;

try

{

GridViewColumn gvc = null;

if (radGridView.Columns.Count > 2)

{

gvc = radGridView.Columns[2] as GridViewColumn;

}

if (gvc == null)

{

ret = false;

}

else

{

for (int i = 0; i < radGridView.Rows.Count; i++)

{

if (radGridView.Rows[i].IsVisible)

{

GridViewRowInfo gvri = radGridView.GridElement.GridViewInfo.Rows[i] as GridViewRowInfo;

if (gvri == null)

{

ret = false;

continue;

}

GridCellElement gce = radGridView.TableElement.GetCellElement(gvri, gvc) as GridCellElement;

if (gce != null)

{

gce.ResetValue(VisualElement.ForeColorProperty);

gce.ResetValue(VisualElement.FontProperty);

gce.DrawFill = false;

}

else

{

ret = false;

}

catch{ ret = false; }

return ret;

}

This function work well in most of cases, but when I delete (all) the rows of my grid and add new ones and then call this function again, that doesn't work : the GridCellElement returns null. If I give the control to the user and then call again the function, it will work.
In my case, it works for the 4 first line of my radGridView (that contains 15 rows). All the rows are threated the same way and the Value of all cells are defined and accessible.

It seems that the source of the problem is in the radGridView.TableElement.VisualRows where some items are missing. They are only four element (instead of 15) in VisualRows object.

Do you have an idea to how solve the problem ?

Best regards,

Georges DE VOS.

GridView

answered on 27 Jul 2017

3 answers

185 views

Detect when user cancels an insert

Is there any way to detect/is there an event raised when a user cancels an insert?

When the user clicks to enter data on the new row, pressing escape twice or clicking off the row twice cancels the insert and reinstates the "click here to enter a new row" banner.

Is there anyway to detect when this happens?

I am trapping when a user starts an insert, and also trapping the AddedNew event to detect when the user completes an insert but also need to know when they choose to cancel one.

Many thanks,

Mark

GridView

answered on 27 Jul 2017