Questions on UI for WinForms Forum

6 answers

3.8K+ views

When a property is changed through my property grid, I want to make sure the tree is up to date.

private void radPropertyGridNode_PropertyValueChanged(object sender, PropertyGridItemValueChangedEventArgs e)
{
radTreeView.Refresh();
}

Refresh() does not work.
Invalidate() does not work.
Update() does not work.

Hovering the control using the mouse does work.

How can I programmatically update the tree so that it fires the NodeFormatting event (where my nodes are updated)?

Treeview

answered on 15 Jan 2021

2 answers

145 views

Tab Close vs. Tab Dragged Out

I want to distinguish between:

A) Tab close.

B) Tab being dragged out into a new parent window

Both of the above call: TabRemoving, TabRemoved

What is the proper event or technique to distinguish between A and B?

TabbedForm

answered on 14 Jan 2021

3 answers

235 views

drag and drop behavior

I am using your drag and drop service between grids. Code is working fine for 10 rows. Lager multirow selections error out. I have experimented and have determined that if the rows are not showing in the grid I get this error. For example, if my grid visually shows 10 rows and I select all of those rows and drag them to another grid all works fine.

If I select the first row and scroll down to select the 11th row while holding down the shift key, all eleven rows are selected. However dragging then to the other grid I get an error in the svc_PreviewDragDrop method on the line: var dragGrid = rowElement.ElementTree.Control as RadGridView;

Error Message below:

Date Time:1/9/2021 6:45:16 PM
Exception Name:Object reference not set to an instance of an object.
Event Name:System.NullReferenceException: Object reference not set to an instance of an object.
at SmartView_V2.frmMainForm.svc_PreviewDragDrop(Object sender, RadDropEventArgs e) in C:\Users\claud\Documents\Visual Studio 2019\Projects\SmartView V2\frmMainForm.cs:line 2387
Control Name:svc_PreviewDragDrop
Form Name:frmMainForm

GridView

answered on 14 Jan 2021

4 answers

69 views

Printing grid in loop issue grid data does not refresh

Hi, I have a loop where I am filling the grid and immediatelly print the grid. All printed documents have the same grid values of the last loaded records to the grid DataSource. Is there something I can do to properly print the grid with correct cell values from actual records?

foreach (var run in _runsToPrint)

{

FillReportedAnalytesGrid();

PrintPreview.PrintGrid(rgvReportedAnalytes, run);

}

private void FillReportedAnalytesGrid()

{

var records = provider.GetReportedResults();

rgvReportedAnalytes.DataSource = null;

rgvReportedAnalytes.DataSource = records;

rgvReportedAnalytes.BestFitColumns(BestFitColumnMode.AllCells);

rgvReportedAnalytes.Refresh();

}

public static void PrintGrid(RadGridView view, string run)

{

var document = new RadPrintDocument();

view.Print(false, document);

}

GridView

answered on 14 Jan 2021

1 answer

70 views

How can Tooltip be implemented in Telerik WinForms?

Are there any options to make a tooltip in which you can place Text, Buttons, etc.?

Something like this:

General Discussions

answered on 14 Jan 2021

3 answers

386 views

Multi Column Group in RadListView

Hello , I am new in Telerik WinForms.

My situation is group all items by its Product Name, while Product has its own price . e.g Product-1 has multiple values/items , similaly Product-2 has own items/values. I know in this situation Grouping concept is used i-e Group By Product, but I want to show Price of that Group along with Product Name.

For clarity i have attached a picture. I want this result in RadListView / Any other Control. Please help me along with coding.

Thanks

ListView

answered on 14 Jan 2021

3 answers

115 views

How to Prevent focus CommandBarDropDownList

Hi,

I'm creating a usercontrol wich contains a RadCommandbar and an editor (richtext).

The commandbar contains two CommandBarDropDownList and standards radbutton.

I'm trying to prevent dropdownlists from gaining focus when I press tab, but neither can focus on dropdownlists nor tabstop on commandbar working.

Focus is still in my first CommandBarDropDownList.

I even tried https://docs.telerik.com/devtools/winforms/controls/commandbar/how-to/prevent-the-control-from-gaining-focus.

To explain exactly what's suppose to happen, when tab key is pressed the user control should gain focus, the commandbar should be skipped and the editor become the active control (kind of).

Thanks a lot for helping me.

Cf: my userControl

CommandBar

answered on 14 Jan 2021

1 answer

220 views

How set margin for Image(icon) in RadContextMenu?

How set margin for Image in RadContextMenu (RadMenuItem)?

Now when setting the image to RadMenuItem, it is too close to the text and left border. How to regulate it?

ContextMenu

answered on 13 Jan 2021

8 answers

194 views

Pop-up menu with Spinner in the GridView.

Hello,

How can I do to put a popup menu (with right click) in the GridView ?. One of the options should be a Spinner.

Attached image.

Thank you very much.

Menu

answered on 13 Jan 2021

1 answer

57 views

Replace DropDown tabs with the system context menu

How to replace DropDown (New tab, Close tab, Close other ...) with the system context menu ( new ContextMenu();).
I got to delete the menu like this:

RadTabbedFormControl.ContextMenuOpening += (obj, arg) => {

arg.ContextMenu.Items.Clear();

};

And to make a new menu, I tried to do it using MouseDown:

e.Tab.Item.MouseDown += (obj, args) => {

if(args.Button == MouseButtons.Right)

{

ContextMenu testMenu= new ContextMenu();

testMenu.MenuItems.Add("Test");

testMenu.Show(e.Tab, new Point(args.Location.X + 5, args.Location.Y - 35));

}

};