Questions on UI for WinForms Forum

9 answers

575 views

Hi, I'm stuck with such a problem.

I need to filter data at grid only from code (ShowFilteringRow = false). My filter condition is slightly complex so I use the FilterPredicate just like that - https://docs.telerik.com/devtools/winforms/gridview/filtering/custom-filtering#implementing-filtering-mechanism-using-filterpredicate

I've set EnableCustomFiltering = true and implement the PerformFiltering predicate:

private void ChangeFilter(bool filtering)

{

tree.BeginEdit();

if (filtering)

{

tree.MasterTemplate.FilterPredicate = new Predicate<GridViewRowInfo>(PerformFiltering);

}

else

{

tree.MasterTemplate.FilterPredicate = null;

}

tree.EndEdit();

}

private bool PerformFiltering(GridViewRowInfo row)

{

return (decimal)row.Cells["UnitPrice"].Value > 30;

}

But nothing happens when I fire the ChangeFilter() - the data still unfiltered. Do you know please, ehat am I doing wrong, or how can I fire filtering process from code?

M

GridView

answered on 02 Apr 2018

7 answers

198 views

Nested Grid Theme

Hi Telerik,

I have a nested grid and would like to apply different theme for each child grid. Is it possible to do such thing?
For example:

- the first grid uses Aqua theme
    - the 1st child grid uses Desert
        - the 2nd child uses Office 2010

Another option is to have different color for each grid.

Regards,

Alep

GridView

answered on 02 Apr 2018

2 answers

171 views

AppointmentBackgroundInfo

I am working on a screen that uses the scheduler. I only want to show the month view and place the different tasks on the calendar. I have this working the main issue I am having is I would like to color the background based on our own internal status. As of right now I have been able to use the AppointmentFormatting to change the colors and have it display the way I would like. I also see that I could add AppointmentBackgroundInfo so for Status Id's that already exist are no issue. Is there a way to override the existing status backcolor and gradientstyle?

Scheduler and Reminder

answered on 02 Apr 2018

0 answers

101 views

mouse scrol combobox gridview

At you on a forum found an example how to make grouping in a combo which is in date grid.
Applying this method a couple of questions arose.
1) Mouse scrolling does not work.
2) How to make AutoCompleteMode

private void UpdateComboBoxSpeziolist()

{

var commandServer = new CommandServer();

_radSpeziolist.SelectedItemChanged += new EventHandler(lv_SelectedItemChanged);

_radSpeziolist.DisplayMember = "fio";

_radSpeziolist.ValueMember = "fio";

_radSpeziolist.DataSource = commandServer.GetDataGridSet(@"select *

from spezialistSurvey()").Tables[0];

_radSpeziolist.EnableGrouping = true;

_radSpeziolist.ShowGroups = true;

GroupDescriptor group = new GroupDescriptor(new SortDescriptor[] { new SortDescriptor("cat", ListSortDirection.Descending) });

_radSpeziolist.GroupDescriptors.Add(group);

_radSpeziolist.AllowEdit = true;

_radSpeziolist.CollapseAll();

}

private void radGridView2_CellEditorInitialized(object sender, GridViewCellEventArgs e)

{

if(e.ActiveEditor is RadDropDownListEditor)

{

RadDropDownListEditor editor = e.ActiveEditor as RadDropDownListEditor;

RadDropDownListEditorElement element = editor.EditorElement as RadDropDownListEditorElement;

element.DropDownSizingMode = SizingMode.UpDownAndRightBottom;

element.Popup.Controls.Add(_radSpeziolist);

element.DropDownMinSize = new Size(300, 300);

element.PopupOpening += new CancelEventHandler(element_PopupOpening);

}

void element_PopupOpening(object sender, CancelEventArgs e)

{

_radSpeziolist.Size = ((RadDropDownListEditorElement)sender).Popup.Size;

_radSpeziolist.AutoScroll = true;

}

private void lv_SelectedItemChanged(object sender, EventArgs e)

{

ListViewItemEventArgs args = (ListViewItemEventArgs)e;

if (args.Item != null && radGridViewSurvey.CurrentCell != null)

{

this.radGridViewSurvey.CurrentCell.Value = args.Item.Value;

((DropDownPopupForm)args.ListViewElement.ElementTree.Control.Parent).ClosePopup(RadPopupCloseReason.Mouse);

radGridViewSurvey.CancelEdit();

}

GridView

asked on 01 Apr 2018

9 answers

480 views

RadGridView filter using wildcards

Hi,

I'm trying to use FilterDescriptors.Expression in radgrid, but everytime i put any wildcard here, it always wraps that wildcard into brackets (name like 'a%' became name like 'a[%]') and grid gets fully filtered, because there is no matching line. I've tried diferent types of wildcards (*, %, ?) but it always gets me the same result. Am I missing something?

Thanks

GridView

answered on 30 Mar 2018

2 answers

414 views

RadDropDownList: Key event(s) for AutoCompleteSuggest

I can't seem to find any working key events for RadDropDownList.DropDownListElement.AutoCompleteSuggest.

What's currently happening:

A user navigates to the desired auto complete suggestion and presses enter on it. They then have to press enter again(to trigger the RadDropDownList.KeyDown event).

What I'd like to happen

A user navigates to the desired auto complete suggestion and presses enter on it. I'm looking for what this event is.

Thanks,

Brandon

DropDownList

answered on 30 Mar 2018

3 answers

113 views

Select vertical range of chart

How to choose the vertical range of the chart?

RangeSelector

answered on 30 Mar 2018

2 answers

163 views

RadScrollablePanel disable wheel scrolling

Hello,

Is there a way to disble the scroll when using the mouse wheel?

Regards,

Alberto

ScrollablePanel

answered on 29 Mar 2018

2 answers

118 views

Show empty group expander image for rows without children rows

I have a hierarchical (rows + children rows) RadGridView. I'm already using the ViewCellFormatting event in order to display my own [+] and [-] images.

Is there a way to know if a "parent" row has no children rows the event handler, so I can set an empty image in the first place? That way the user has a visual clue that the row doesn't need to be expanded.

GridView

answered on 29 Mar 2018

16 answers

697 views

RadDropDownList focus bug

Hi,

I found a bug when adding a few input controls like textboxes etc on a form, in combination with the raddropdownlist (DropDownStyle = DropDownList). When pressing the tab key to focus the next control, everything works normally with the textboxes, but when the dropdownlist gets focus, there is no visual feedback to see which control has the focus. After manually clicking the dropdownlist, the tab key focus works as it should do.

Tested with the winforms product, version 2013.1 321 (mar. 21, 2013) on a Windows 7 machine 64 bit, with the VisualStudio2012Light theme.

PS, I wanted to add this bug in your tracking system, but the RadDropDownList is not in the selection where you should choose the bug-related control. This list could also be sorted alphabetically, which makes finding the right control much easier ;)

DropDownList

answered on 29 Mar 2018