Questions on UI for WinForms Forum

1 answer

24 views

When the ForeColor is changed in the TextChanged event, the MouseOver (hover) effect stops working.

私はRadTextBoxとRadDropDownListを使っており、TextChangedイベントが発生し値が無効と判断されると、テキストの色が赤に変わるロジックを実装しています。

エラーが解決したら、テキストの色を元の色に戻します。しかし、テキストの色をリセットした後、マウスオーバー(ホバー)効果がもう機能しなくなったようです。

通常、RadTextBoxにカーソルを合わせると、状態(2)から状態(1)へと変化します(状態(1)と状態(2)の定義については添付の画像を参照してください)。しかし、TextChangedイベントが発生したRadTextBoxの場合、テキストの色が復元された後も(1)の状態にとどまります。同じ問題はRadDropDownListでも発生します。

テキストの色をリセットした後に、元のMouseOverの動作を復元するための追加の設定や方法はありますか?

DropDownList

TextBox

answered on 03 Jun 2026

3 answers

479 views

After 2021.2.505.1 update, VS 2019 stops responding WinForms Converter extension?

I'm getting the following error every time I load any project in VS 2019 (16.9.4)

"Visual Studio stopped responding for 12 seconds. Disabling the extension Progress Telerik WinForms Converter 2021.2.505.1 might help."

See attached image of error.

How to resolve?

Cheers, Rob.

EDIT: for any project, WPF, UWP, etc. (not just WinForms)

Visual Studio Extensions

answered on 29 May 2026

1 answer

31 views

About the appearance of the color when a CommandBarButton is focused.

Please refer to the image. The color of the CommandBarButton in the command bar changes when the cursor hovers over it—where can I configure the property for this color? (the red-framed area in the image)

CommandBar

answered on 27 May 2026

9 answers

388 views

Scroll Schedule when dragging appointment

Hi,

In week view, is it possible to auto scroll the schedule when dragging the appointment to the right or left edges of the current view, thus allowing appointments to be dragged into another week?

Does anyone have any working sample code?

Thanks

Simon

Scheduler and Reminder

answered on 08 May 2026

1 answer

104 views

Refreshing grid from BindingList

Given the UI below which is bound to BindingLists implementing INotifyChanged interface, I'm seeing some weird behavior.

If I click on on a top row like Account or Active Contract, the items under it check/uncheck correctly. I'm doing this via the gvGrids_CellEndEdit event like this:

private void gvGrids_CellEndEdit(object sender, GridViewCellEventArgs e)

{

string formName = e.Row.Cells["FormDescr"].Value.ToString();

foreach(var item in gridOptionsListDetail.Where(n => n.FormDescr == formName))
{
item.Selected = (bool)e.Value;
}
}

The problem occurs when I click on the checkbox to the left of Form. Doing so fires the HeaderCellToggleStateChanged event:

private void gvGrids_HeaderCellToggleStateChanged(object sender, GridViewHeaderCellEventArgs e)

{
if (e.Column.Name == "Selected")
{
ToggleGrids(e.State == Telerik.WinControls.Enumerations.ToggleState.On);

gvGrids.MasterTemplate.Refresh();

gvGrids.TableElement.Update(GridUINotifyAction.DataChanged);
}
}

This event will check the Account and Active Contract checkboxes and the ToggleGrids() method will check the Selected property in the underlying BindingList but the subgrid will not refresh unless I scroll down and up again. The weird thing is that If I click the Select All/Deselect All links, which call the same ToggleGrids() method, all works well.

What am I missing here?

Thanks

Carl

GridView

answered on 07 May 2026

1 answer

46 views

Ribbon default tab

I have a RichTextEditRibbonBar and RadRichTextEditor, linked together. I'm using this as an email compose window, so I hid most of the tabs, just keeping Home, Insert, and Page Layout. After doing so though, the ribbon defaults to showing the Page Layout tab. I added some code on the form load event to select the Home tab, but if I select a table in the email, bringng up the Table Tools context ribbon, when I leave the table (click somewhere else in the editor) it jumps to Page Layout again.

Any suggestions, as its quite annoying. Designer code below:

        ctlMenu.AssociatedRichTextEditor = txtMessage
        ctlMenu.Location = New System.Drawing.Point(0, 0)
        ctlMenu.Name = "ctlMenu"
        ctlMenu.Size = New System.Drawing.Size(1028, 176)
        InboxControlStyler.SetStyleSettings(ctlMenu, New Infragistics.Win.AppStyling.Runtime.InboxControlStyleSettings(Infragistics.Win.DefaultableBoolean.Default))
        ctlMenu.TabIndex = 0
        ctlMenu.TabStop = False
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(3), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Text = "References"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(3), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Visibility = Telerik.WinControls.ElementVisibility.Collapsed
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(3), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Name = "tabReferences"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(4), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Text = "Mailings"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(4), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Visibility = Telerik.WinControls.ElementVisibility.Collapsed
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(4), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Name = "tabMailings"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(5), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Text = "Review"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(5), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Visibility = Telerik.WinControls.ElementVisibility.Collapsed
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(5), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Name = "tabReview"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(6), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Text = "View"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(6), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Visibility = Telerik.WinControls.ElementVisibility.Collapsed
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(6), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Name = "tabView"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(7), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Text = "Developer"
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(7), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Visibility = Telerik.WinControls.ElementVisibility.Collapsed
        CType(ctlMenu.GetChildAt(0).GetChildAt(4).GetChildAt(0).GetChildAt(0).GetChildAt(7), Telerik.WinControls.UI.RichTextEditorRibbonUI.RichTextEditorRibbonTab).Name = "tabDeveloper"

RibbonBar

RichTextEditor

answered on 05 May 2026

1 answer

71 views

StepProgressBar connection color settings

Is it possible to add a setting that changes the color of the StepProgressBar connection when it is completed?
I would like to set this manually rather than through a theme.
Example: gray → blue

StepProgressBar

answered on 28 Apr 2026

1 answer

42 views

RadToggleSwitch

I must be missing something very basic here. I added a RadToggleSwitch to my form and I want it to slide between On and Off like this:

I would have thought that this code would do it:

radToggleSwitch1.OffElement.Text = "Off";
radToggleSwitch1.OnElement.Text = "On";

However, its appearing like this:

I'm sure I'm missing something simple. Any ideas?

Thanks

Carl

Buttons, RadioButton, CheckBox, etc

answered on 28 Apr 2026

2 answers

39 views

RadPageView - color items

Hello,
I’m working with a RadPageView in Strip view mode and I need to color each tab (page) individually. The coloring works, but I’m facing two issues:

1. Selected tab color – I want to change the tab’s color when it becomes selected. I tried handling this in SelectedPageChanging, but I’m unable to restore the previous color correctly.

2. Font color – I need to adjust the text color based on the tab’s background (white text for dark tabs, black text for light tabs).

Is this possible to achieve?
Thank you for your help.

Radek

PageView

answered on 27 Apr 2026

1 answer

68 views

add a image to the top-left corner of the grid header

Hello,
I’m developing an OOABL application using the Telerik GridView component.
How can I add an image to the top-left corner of the grid header?
And how can I add a context menu when the image is clicked?
Thank you for your feedback.

GridView

answered on 16 Apr 2026