Questions on UI for WinForms Forum

2 answers

54 views

GridView permanent filter editor. Size issues with RadDropDownListElement.

I've tried implement custom filter as per Permanent editor in a filter cell - Telerik UI for WinForms instruction
but when I run that project drop down list looks too small to hold its content. Please look at attached screenshot.

Could you advise me how to properly calculate size of dropdown, or in other way make it fit its content. The only way I found is to set

 this.dropDown.MinSize = new Size(150, 30);

inside CreateChildElements method. But I'm not sure this is the best way to fix this issue. Could you please advise me how to handle those kinds of size issues?

DropDownList

GridView

answered on 23 Jan 2025

1 answer

39 views

Item appears duplicated in the popup when selected Desert Theme

Hello,

How do i make the item appear only once in the popup when the theme is Desert?

1 - Without Theme

2 - Desert Theme

Code:

List<TecnicoServicoInfo> listaTecnicos = new List<TecnicoServicoInfo>();

TecnicoServicoInfo tec = new TecnicoServicoInfo();
tec.CdFuncionario = -1;
tec.DsFuncionario = " ";
TecnicoServicoInfo tec1 = new TecnicoServicoInfo();
tec1.CdFuncionario = 80;
tec1.DsFuncionario = "robsu";
TecnicoServicoInfo tec2 = new TecnicoServicoInfo();
tec2.CdFuncionario = 1558;
tec2.DsFuncionario = "joelssu";
TecnicoServicoInfo tec4 = new TecnicoServicoInfo();
tec4.CdFuncionario = 333;
tec4.DsFuncionario = "TESTE UM NOME MAIOR QUE TODOS OS OUTROS PARA VER O TEMA";
listaTecnicos.Add(tec);
listaTecnicos.Add(tec2);
listaTecnicos.Add(tec1);
listaTecnicos.Add(tec4);
listaTecnicos = listaTecnicos.OrderBy(x => x.DsFuncionario).ToList();

ddlTecnico.DropDownStyle = RadDropDownStyle.DropDown;
ddlTecnico.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
ddlTecnico.DropDownListElement.AutoCompleteSuggest.SuggestMode = SuggestMode.Contains;
ddlTecnico.Items.Clear();

ddlTecnico.DescriptionTextMember = "DsFuncionario";
ddlTecnico.ValueMember = "CdFuncionario";
ddlTecnico.DisplayMember = "DsFuncionario";

ddlTecnico.DataSource = listaTecnicos;

ddlproxima.DropDownStyle = RadDropDownStyle.DropDown;
ddlproxima.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
ddlproxima.DropDownListElement.AutoCompleteSuggest.SuggestMode = SuggestMode.Contains;
ddlproxima.Items.Clear();

ddlproxima.DescriptionTextMember = "DsFuncionario";
ddlproxima.ValueMember = "CdFuncionario";
ddlproxima.DisplayMember = "DsFuncionario";

ddlproxima.DataSource = listaTecnicos;

ddlproxima.AutoSizeItems = false;
ddlproxima.AutoSize = false;

Telerik version: 23.2.718

Thank You!

DropDownList

Themes and Visual Style Builder

answered on 03 Dec 2024

2 answers

56 views

DropDown Dynamic loadDate

I had a question about the Dropdown element, I saw how to search for it, but I couldn't find it for dynamic
    public SearchWarehouseNP()
    {
        InitializeComponent();
        dropdownSettlement.DropDownStyle = RadDropDownStyle.DropDown;
        dropdownSettlement.AutoCompleteMode = AutoCompleteMode.Suggest;

        dropdownSettlement.DropDownListElement.AutoCompleteSuggest = new CustomAutoCompleteSuggestHelperUpdate(
            dropdownSettlement.DropDownListElement,
            async query =>
            {
                if (string.IsNullOrWhiteSpace(query) || query.Length < 3)
                    return Enumerable.Empty<DescriptionTextListDataItem>();

                var response = await _searchSettlementService.GetCityData(query);
                if (response.success && response.data.Any())
                {
                    return response.data.First().Addresses.Select(a => new DescriptionTextListDataItem
                    {
                        Text = $"{a.MainDescription} ({a.Area})",
                        Value = a.MainDescription,
                        DescriptionText = a.Area
                    });
                }

                return Enumerable.Empty<DescriptionTextListDataItem>();
            }
        );

        dropdownSettlement.SelectedIndexChanged += (s, e) =>
        {
            if (dropdownSettlement.SelectedItem is DescriptionTextListDataItem selectedItem)
            {
                Console.WriteLine($"Выбрано: {selectedItem.Text} ({selectedItem.Value})");
            }
        };
    }
}
The problem is that the data is not stored in Items

Console.WriteLine empty


using Telerik.WinControls.UI;

namespace NovaPostOrderManager.Helpers;

public class CustomAutoCompleteSuggestHelperUpdate : AutoCompleteSuggestHelper
{
    private readonly Func<string, Task<IEnumerable<DescriptionTextListDataItem>>> _fetchDataAsync;
    private CancellationTokenSource _cts = new();

    public CustomAutoCompleteSuggestHelperUpdate(RadDropDownListElement owner, Func<string, Task<IEnumerable<DescriptionTextListDataItem>>> fetchDataAsync)
        : base(owner)
    {
        _fetchDataAsync = fetchDataAsync;
    }

    protected override async void SyncItemsCore()
    {
        // Текущий текст из поля ввода
        string currentInput = Filter;

        // Проверяем, нужно ли загружать данные
        if (string.IsNullOrWhiteSpace(currentInput) || currentInput.Length < 3)
        {
            DropDownList.ListElement.Items.Clear();
            DropDownList.ClosePopup();
            return;
        }

        // Отменяем предыдущий запрос
        _cts.Cancel();
        _cts = new CancellationTokenSource();

        try
        {
            // Задержка перед началом запроса
            await Task.Delay(300, _cts.Token);

            // Загружаем данные
            var items = await _fetchDataAsync(currentInput);

            _cts.Token.ThrowIfCancellationRequested();

            DropDownList.ListElement.BeginUpdate();
            DropDownList.ListElement.Items.Clear();

            // Добавляем элементы в выпадающий список
            foreach (var item in items)
            {
                DropDownList.ListElement.Items.Add(item);
            }

            DropDownList.ListElement.EndUpdate();

            if (DropDownList.ListElement.Items.Count > 0)
            {
                DropDownList.ShowPopup(); // Показываем список, если есть элементы
            }
            else
            {
                DropDownList.ClosePopup();
            }
        }
        catch (TaskCanceledException)
        {
            // Запрос был отменён — игнорируем
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Ошибка загрузки данных: {ex.Message}");
        }
    }

    protected override bool DefaultFilter(RadListDataItem item)
    {
        if (item is not DescriptionTextListDataItem descriptionItem)
            return base.DefaultFilter(item);

        return descriptionItem.Text.Contains(Filter, StringComparison.CurrentCultureIgnoreCase) ||
               descriptionItem.DescriptionText.Contains(Filter, StringComparison.CurrentCultureIgnoreCase);
    }
}

DropDownList

answered on 29 Nov 2024

1 answer

48 views

DropDownList in StatusStrip

Is there a simple way of making a simple DropDownList in the StatusStrip control? (or any other menu)

Thank you in advance.

DropDownList

StatusStrip

answered on 23 Oct 2024

1 answer

54 views

Remove down arrow in RadTabbedForm header

Hi,

how can I remove the arrow button in a RadTabbedForm header (WinForms)? Please see the attached photo

Thanks,

Roy

Buttons, RadioButton, CheckBox, etc

DropDownList

TabbedForm

answered on 23 Oct 2024

1 answer

86 views

RadDropDownList disable arrow when readonly

Hello,

I am new to WinForms.

Is there a possibility to disable the Arrow for the RadDropDownList ?

When I set the component to readonly, I can still choose a new value via the arrow.

But then the value is never saved because it is read-only.

And wich property do I have to set for this?

DropDownList

answered on 18 Sep 2024

1 answer

68 views

RowsChanged is fired after CellEditorInitialized without any change

How to fix the issue below where a cell is marked with modified just because the cell was clicked?

Before the datasource is set.

After the datasource is set.

The value was not changed, but it is firing he RowsChanged.

How can avoid it to happen?

DropDownList

GridView

answered on 16 Sep 2024

1 answer

63 views

initialization radDropDownList after update a record in the table

Hi,

I have an RadDropDownList filled with some record of a table (ttSoc) using DataSource and bounded functionality.

I have a button that lets me add/delete records from this table (ttsoc).
Impossible to update the RadDropDownList

my code:

in the form load I run ChargeCodeSociete('InitBe').

In the click button I run ChargeCodeSociete('affiche').

METHOD PRIVATE VOID BtnSociete_Click( INPUT sender AS System.Object, INPUT e AS System.EventArgs ):

// On instancie la classe
oFrmSociete = NEW frmSociete().
// En attente du retour de la form en mode dialog box
WAIT-FOR oFrmSociete:ShowDialog().

oongDescriptionEtudeGeneral:ChargeCodeSociete('Affiche').

RETURN.

END METHOD.

IN oongDescriptionEtudeGenral FORM

METHOD PUBLIC VOID ChargeCodeSociete( INPUT ipcMode AS CHARACTER ):
CASE ipcMode:
WHEN 'InitBe' THEN DO:
beSociete= NEW fichier.description_etude.be.beSociete().

beSociete:ReadbeSociete(OUTPUT DATASET dsSoc).

//Associer le query du dataset au probadingSource
bsSociete:HANDLE = DATASET dsSoc:HANDLE.
END.
WHEN 'Affiche' THEN DO:
DATASET dsSoc:TOP-NAV-QUERY():QUERY-PREPARE("FOR EACH ttSoc").
DATASET dsSoc:TOP-NAV-QUERY():QUERY-OPEN().

DropDownListCodeSociete: ?????

END.
END CASE.

thank you for your feedback

DropDownList

answered on 26 Aug 2024

8 answers

820 views

radDropDownList Border Color

Hi,

I am unable to highlight the full dropdown list (including the text box and button)

The attached file will show how it is currently highlight but would like to highlight in the same way(color and thickness) as the textbox in the attached file. I used the below code but it did not highlight the button.

Thanks in advance for your help.

radDDL.DropDownListElement.TextBox.Fill.BackColor = Color.Red;

DropDownList

updated answer on 12 Aug 2024

3 answers

131 views

How to change the color in RadDropDownList and RadSpinEditro?

1.RadDropDownList：

How can I change the color of the RadDropDownListArrowButtonElement when the mouse triggers the radDropDownList control? I have not been able to find a way to modify this color.I try my best to solve it ,but it works not well.

How can I change the color of the dropdown content when the mouse hovers over it? I have also not been able to find a way to modify this color.
How can I remove the white shadow under the downward triangle? I want it to be entirely black without any white shadow.

2.RadSpinEditor:

When I use RadSpinEditor, I have the same questions in it.