Questions on UI for WinForms Forum

3 answers

252 views

I have a controls RadTextBox, RadDateTimePicker, RadDropdown etc... I want to add icon to each control that is the Mandatory Field sign to the user. Currently in TELERIK I am able to see only error icon, that also not showing immediately after the form load.

-----------------------------------------------------

Below is an example for what I am expecting:

I used other tool controls which provides that facility.

I used below components in another tool, to show you what I am expecting.

ValidationProvider
ErrorProvider

Please see attached filed to know my expected result.

DesignTime:

Run Time:

Please do the needful, and code it/suggest and attach a sample app.

Thanks

DateTimePicker

DropDownList

TextBox

ValidationProvider

answered on 23 May 2024

1 answer

82 views

GridView performance in self referencing hierarchy mode

Hello,
I have problem with performance of GridView in self referencing hierarchy mode. I am working on move up/down function to move specific row up or down. I need to move it also in my underlying list, so I move it first in my list and then clear BindingList for GridView and add new items. This is done in DoRefreshEditorItems method of TestParEditorCollection class:

		private void DoRefreshEditorItems()
		{
			EditorItems.Clear();
			maxGridId = 0;

			foreach (var item in Items)
			{
				var editorItem = new TestParEditorItem(item, ++maxGridId);
				EditorItems.Add(editorItem);

				if (item.HasSubItems)
					AttachSubItems(editorItem);
			}

			RenumberRows();
		}

Each call to EditorItems.Add() takes cca 100ms and whole refresh of 20 rows takes cca 2s. It looks like this:

I also tried to set DataSource to null, refresh binding list and set DataSource back, but it looks very similar. I have attached test project, it's TelerikTestReal project in solution.

GridView

answered on 22 May 2024

1 answer

99 views

Label Control - Color Specific words in the TEXT value

How can a specific color be set to specific words in the TEXT value of a LABEL?

I have tried using the following

radLabel.Text = "<HTML><color=red>Hello<color=black>World</HTML>";

But it doesn't work, I get the following when running our code.

<HTML><color=red>Hello<color=black>World</HTML>

Any help would be greatly appreciated.

Thank You

Label

answered on 16 May 2024

0 answers

219 views

2024 Q4 distribution changes in Telerik UI for WinForms

As of 2024 Q4 (November), we will deprecate .NET 7 distribution. This decision is rooted in our dedication to align with Microsoft’s recommended framework versions so that our products leverage the latest advancements in technology, security, and performance.

We are aligning our product with Microsoft’s lowest-supported framework versions for .NET Framework and .NET, respectively. Please refer to the following blog post: Product Update for Enhanced Performance and Security (telerik.com)

For more information about how to upgrade your project when a new version of the Telerik UI for WinForms suite is released, you can check here: How to Upgrade a Telerik UI for WinForms Project - Telerik UI for WinForms

General Discussions

asked on 16 May 2024

1 answer

115 views

RadDock, changing Tab and Tab Text color for selected/unselected Tabs

I have this to change the tabs colors when selected/unselected

{

.....

this.radDock1.ActiveWindowChanging += new DockWindowCancelEventHandler(radDock1_ActiveWindowChanging);
this.radDock1.ActiveWindowChanged += new DockWindowEventHandler(radDock1_ActiveWindowChanged);

}

void radDock1_ActiveWindowChanged(object sender, DockWindowEventArgs e)
{
SizeAndColorSelectedDocWindowTab(e.DockWindow.TabStripItem, Color.LightBlue, Color.CornflowerBlue);
}

void radDock1_ActiveWindowChanging(object sender, DockWindowCancelEventArgs e)
{
SizeAndColorUnSelectedDocWindowTab(e.OldWindow.TabStripItem, Color.CornflowerBlue, Color.DarkBlue);
}

But how can I change the color of the Tab title? when unselected the text almost disappears, I would like to change to a whiter color

Also, this works when the children are Tabbed, how can I implement something similar on titlebar when DockPosition.Left (or anything else than tabbed) ?

Dock

Form

TitleBar

answered on 15 May 2024

1 answer

84 views

Hide Filter/collapse dropdown when filter cell has value

When using the filtering cells on the gridview, let's say it is set to "Contains:"

When the user types in that filter cell, the word "Contains:" remains visible and uses up most of the space where the user is typing... this often results in the letters or numbers that the user is typing there to become 'chopped off'.

For example, if the column width is 100 and the user is typing a 3 digit number "123" the filter cell shows only "23" because the dropdown is showing the word "Contains:" and it obscures the "1" in "123".

Is there a way to collapse the dropdown filters lettering when the filter cell has a value in it? E.g. - Initially, it shows the word Contains... but as soon as the filter cell has a value, I'd like the word "Contains" to collapse or be removed. Then if the user removes any values from the filter cell - the filter Dropdown selector reappears.

GridView

answered on 15 May 2024

1 answer

93 views

RadTreeView in RadDock sporadically wont let user scroll to bottom of tree

Hello,

We have a RadTreeView control inside a ToolWindow (with Dock = Fill) in a RadDock control. The nodes are added to the tree programmatically and AllowArbitraryItemHeight=false and TreeViewElement.AutoSizeItems=true. There is no ItemHeight set at all. We are sporadically getting an issue where the RadTreeView won’t let the user scroll to the bottom of the tree. We can’t consistently reproduce this error however. Is there any advice you can give how to try figure out what is going on?

Thanks,

Hayley

Dock

Treeview

answered on 15 May 2024

1 answer

91 views

GridView exception when adding or cancelling new rows where columns are null

Hello,

I have a RadGridView databound to a DataView with AddNewBoundRowBeforeEdit = true. Multiple columns in the DataView.Table have AllowDbNull set to false. I'm getting exceptions however when i try and add a new row without specifying a value for the columns that dont accept Db null, and even if i press Escape to cancel the new row the grid seems to freeze and i can no longer try add new rows.

I've attached a sample application and a screenshot of the error. The steps to reproduce the exception in the test app are:

1. Click on any column in add new record row
2. Click on an existing row in the grid. Exception will appear in message box. Press OK
3.. Try and click on add new record row again. Either nothing will happen or another exception will appear.

The exception will also appear if you click in the add new record row, then press Esc key

Thanks,

Hayley

GridView

answered on 15 May 2024

2 answers

89 views

How we can have 3D Border style of RadGrid?

I need border 3d border style of rad grid view.
Like attached below image.

GridView

answered on 15 May 2024

3 answers

147 views

GridView with self referencing hierarchy problem, child rows not shown after adding programmaticaly

Hello,

I have two problems with selfrefencing hierarchy in GridView. First, my test application is related to this thread, just for info and context, but I am asking question in new thread, as it was recommended to me, and I think this is separate problem not related to original design question.

https://www.telerik.com/forums/gridview---design-of-parameter-editor-with-subitems

I have created more realistic test application (TelerikTestReal in attached project) with new data structures for self referencing hierarchy binding. I can see desired output after program startup. When I add new main item programatically, GridView shows it properly. But, when I change test type of main item and subitems are changed, deleted child rows disappear, but newly added are not shown, as you can see on animation below. After some debugging, I see child rows are added to BindingList bound to DataSource of GridView, I also see ListChanged event of BindingList is properly fired, but GridView doesn't show new child rows. I can show them by calling ResetBindings() method of BindingList. What can be the problem?

The second problem is that I cannot close program after call to ResetBindings() method, I can click close button manytimes, but nothing happens.

GridView

answered on 09 May 2024