The horizontal scrollbar should not appear on top of the data row.

Elements in the child grid that are outside of the parent bounds are not active. This means that you can't resize the column, edit, filter, sort or use any other build-in behavior.

RadVirtualGrid.Selection.HasSelection (VirtualGridSelection.HasSelection) or is never false.

RadVirtualGrid grid = new RadVirtualGrid();
var hasSelection1 = grid.Selection.HasSelection; 
_grid.Selection.ClearSelection();
var hasSelection2 = grid.Selection.HasSelection;

After initializing the grid, and not loading anything, HasSelection is true, while nothing is selected.

After clearing the selection, HasSelection remains true.

This property is used in your own code as a pretest for some operations. (Like Copy or Cut).

Am I interpreting this property the wrong way?

Repro-steps

• Create a RadVirtualGrid en fill it with random data.
• Allow the grid to select multiple rows.
• Select all rows
• Right click on a cell, a context menu appears...
  

Observed behavior

First, lets compare this with when you right click on a record selector (the cell before a row starts, sometimes with an arrow). In that case only that row gets selected, so you visually see what the context menu is about. When you right click on a cell, the selection does not change so the context remains unclear. In my printscreen above it is hard to see on which cell I clicked.

Second, the actions in the context menu target multiple targets or contexts. Copy and Paste target the whole selection. Clear and Edit target the cell, Delete Row targets the row which I clicked on, but which is not visible. 

In this case, the user actually wanted to right click and delete ALL rows, which is not part of the context menu. Instead he clicked on Delete Row and he was unaware of what he had actually deleted.

Expected bevahior

• Or, when you right click on a cell, the cell gets highlighted, so you know where you have clicked
• Or, the rows gets highlighted (like your pressed on the record selector)
• Or, the cell gets highlighted
• And/or, the context menu offers an action to Delete All Rows.

Repro steps:

• Create a RadVirtualGrid
• Fill it with some records.
• Make sure nothing is selected (RadVirtualGridElement.CurrentCell is null)
• Press CTRL-C
• A NullReferenceException is thrown (this because RadVirtualGridElement.CopyToClipboard accesses CurrentCell.ViewInfo while CurrentCell is null.)

Exception:

Message             : Object reference not set to an instance of an object.
Type                : System.NullReferenceException
Source              : Telerik.WinControls.GridView
Stack trace         : Telerik.WinControls.UI.RadVirtualGridElement.CopyToClipboard(Int32 startRow, Int32 startColumn, Int32 endRow, Int32 endColumn, VirtualGridViewInfo viewInfo, Boolean selectedOnly, Boolean cut)
                      Telerik.WinControls.UI.RadVirtualGridElement.CopySelection()
                      Turien.Windows.Forms.Telerik.VirtualGrid.VirtualGridViewPlus.RadVirtualGridElementPlus.CopySelection()
                      Turien.Windows.Forms.Telerik.VirtualGrid.VirtualGridViewPlus.VirtualGridInputBehaviorPlus.HandleUnhandledKeys(KeyEventArgs keys)
                      Telerik.WinControls.UI.VirtualGridInputBehavior.HandleKeyDown(KeyEventArgs args)
                      Telerik.WinControls.UI.RadVirtualGrid.OnKeyDown(KeyEventArgs e)
                      System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
                      System.Windows.Forms.Control.ProcessKeyMessage(Message& m)
                      System.Windows.Forms.Control.WmKeyChar(Message& m)
                      System.Windows.Forms.Control.WndProc(Message& m)
                      System.Windows.Forms.ScrollableControl.WndProc(Message& m)
                      Telerik.WinControls.RadControl.WndProc(Message& m)
                      System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
                      System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
                      System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
                      System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
                      System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
                      System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
                      System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
                      System.Windows.Forms.Application.Run(Form mainForm)
                      Turien.Schade.PremiumCalculator.LookupTableManager.Program.Main()

When copying to from the RadVirtualGrid to the clipboard, the HTML format is not supported.

I was thinking about creating a feature request, but I really think this is a bug, because:

1. It is not consistent with its little brother RadGridView, which does support HTML.
2. HTML should be supported by Teleriks own documentation: https://docs.telerik.com/devtools/winforms/controls/virtualgrid/copy-paste-cut 

Please, implement the support for HTML.

When I use the Copy method in the RadGridView, the content is copied to the clipboard in multiple formats. Each format can be cancelled. If a format is cancelled it is not even serialized into the DataObject. This way a programmer can replace the copy-routine for that format with his own.

When I do the same with RadVirtualGrid, and I only want to copy format CSV and I want to cancel the rest, nothing is copied to the clipboard. The funny thing is, inspecting the code, the data is always serialized to the DataObject BEFORE the event is fired to find out if that action is needed. This is a performance penalty.

So these two behaviors are inconsistent. It is also inconsistent the the Paste-operations of both grids.

Current code:

public void CopyToClipboard(
      int startRow,
      int startColumn,
      int endRow,
      int endColumn,
      VirtualGridViewInfo viewInfo,
      bool selectedOnly,
      bool cut)
    {
      DataObject dataObject = new DataObject();
      string data1 = this.ProcessContent(DataFormats.Text, startRow, startColumn, endRow, endColumn, viewInfo, selectedOnly, cut);
      dataObject.SetData(DataFormats.UnicodeText, false, (object) data1);
      VirtualGridClipboardEventArgs args1 = new VirtualGridClipboardEventArgs(false, DataFormats.UnicodeText, dataObject, this.CurrentCell.ViewInfo);
      this.OnCopying(args1);
      if (args1.Cancel)
        return;
      dataObject.SetData(DataFormats.Text, false, (object) data1);
      VirtualGridClipboardEventArgs args2 = new VirtualGridClipboardEventArgs(false, DataFormats.Text, dataObject, this.CurrentCell.ViewInfo);
      this.OnCopying(args2);
      if (args2.Cancel)
        return;
      string data2 = this.ProcessContent(DataFormats.CommaSeparatedValue, startRow, startColumn, endRow, endColumn, viewInfo, selectedOnly, cut);
      dataObject.SetData(DataFormats.CommaSeparatedValue, false, (object) data2);
      VirtualGridClipboardEventArgs args3 = new VirtualGridClipboardEventArgs(false, DataFormats.CommaSeparatedValue, dataObject, this.CurrentCell.ViewInfo);
      this.OnCopying(args3);
      if (args3.Cancel)
        return;
      Clipboard.SetDataObject((object) dataObject);
    }

public void CopyToClipboard(
	int startRow,
	int startColumn,
	int endRow,
	int endColumn,
	VirtualGridViewInfo viewInfo,
	bool selectedOnly,
	bool cut)
{
	DataObject dataObject = new DataObject();

	VirtualGridClipboardEventArgs eventArgs = new VirtualGridClipboardEventArgs(false, DataFormats.UnicodeText, dataObject, CurrentCell.ViewInfo);
	OnCopying(eventArgs);
	bool useText = !eventArgs.Cancel;
	
	eventArgs = new VirtualGridClipboardEventArgs(false, DataFormats.UnicodeText, dataObject, CurrentCell.ViewInfo);
	OnCopying(eventArgs);
	bool useUnicodeText = !eventArgs.Cancel;

	if (useText || useUnicodeText)
	{
		string text = __instance.ProcessContent(DataFormats.Text, startRow, startColumn, endRow, endColumn, viewInfo, cut);
		if (useText)
			dataObject.SetData(DataFormats.Text, false, text);
		if (useUnicodeText)
			dataObject.SetData(DataFormats.UnicodeText, false, text);
	}
	eventArgs = new VirtualGridClipboardEventArgs(false, DataFormats.Text, dataObject, CurrentCell.ViewInfo);
	OnCopying(eventArgs);
	if (!eventArgs.Cancel)
	{
		string csv = __instance.ProcessContent(DataFormats.CommaSeparatedValue, startRow, startColumn, endRow, endColumn, viewInfo, selectedOnly, cut);
		dataObject.SetData(DataFormats.CommaSeparatedValue, false, csv);
	}
	
	if (dataObject.GetFormats().Length > 0)
		Clipboard.SetDataObject(dataObject);
}

Right now, when a VirtualGridDateTimeEditor is displayed in a RadVirtualGrid, and the user chooses to enter the date (and not use the date time picker), then the user has to enter the date inclusing the separators.

So a Dutch date has format: "dd-MM-yyyy", and the user has to enter "31-12-2023", including the dashes.

Hereby my request for a new feature:  Entering dates without the separators / dashes, thus: "3112023". So at the moment the user enters two digits, move to the next segment, etc. The request goes for the time segments.

This would be a performance gain while doing a lot of data entry.

Repro steps:

1. Create a RadVirtualGrid
2. Give it a DateTime column
3. Make sure the editor (VirtualGridDateTimeEditor) accepts dutch formats for dates (dd-MM-yyyy)
4. Add a row with value: 30-11-2023
   
   
5. Double click on the value and try to change it my literally typing: "31-12-2023"
   

Observed behavior:

• A field with the value 01-12-2023
  
  (this happens as soon as you type "31")
• The user needs to first enter the month, then the day to correct this.

Expected behavior:

• A field with the value: 31-12-2023

Observation / suggestion:

• The controle tries to validate and correct EVERY input, even when the input is not finished yet. Everybody knows "31-11-2023" is an incorrect value. But during changing it, this should not matter. The scope at that point should be: Making the user happy by accepting the input. When the user leaves the field, or enters the last digit, validation should take place. Or, if halfway entering the value, the totale date is invalid, do not change it and wait for the user to complete.

Please refer to the attached sample project and the gif file. You will notice that when resizing the grid, in certain cases unnecessary horizontal scrollbar appears.

I have a RadVirtualGrid with hierarchical data. When I change the page, then expand a row, and then hit the tab key I get an ArgumentOutOfRangeException:

Value of '-3838' is not valid for 'Value'. 'Value' must be between 'Minimum' and 'Maximum'.
Parameter name: Value

When you have a RadVirtualGrid with hierarchy and after expanding a row if you right-click a cell in the child grid and select the "Copy" item, it doesn't copy the text of the cell I right-clicked, it copies the text of the first cell. 

Please test with the attached sample project.

Hi,

I have a RadVirtualGrid. I add a filter descriptor and then fetch the filtered data from the data store. I then clear the filters and perform a different fetch from the store. However, when I click in the filter value textbox the text from the previous filter operation is still there even though I purposely call radVirtualGrid.FilterDescriptors.Clear() prior to fetching the data from the store.

The filter text doesn't display in the filter row for the column where the filter was entered until I click in the text edit area.

How do I get rid of the text from the previous filter?

thanks,

Mike

dear sir ,

i have a problem keydown event does not fire in add new row ?

i want to move to the next cell when i hit Enter key after entering new value and when i reach the last cell of the add new row and type enter the new row will automatically added to the grid....

what's i have to do.....

please any suggest ? thx

Please use the following code snippet and click the filter button for the first column in the virtual grid. You will notice that the default menu is shown:

        RadContextMenu menu = new RadContextMenu();
        public RadForm1()
        {
            InitializeComponent();
            RadDateTimePicker aDateTimePicker = new RadDateTimePicker();
            RadMenuItem theMenuItem = new RadMenuItem();
            theMenuItem.MinSize = new Size(200, 30);
            RadHostItem theHostItem = new RadHostItem(aDateTimePicker);
            theMenuItem.Children.Add(theHostItem); 
            menu.Items.Add(theMenuItem);
            this.radVirtualGrid1.RowCount = 50;
            this.radVirtualGrid1.ColumnCount = 5;
            this.radVirtualGrid1.CellValueNeeded+=radVirtualGrid1_CellValueNeeded;

            this.radVirtualGrid1.AllowFiltering = true;
            this.radVirtualGrid1.ContextMenuOpening+=radVirtualGrid1_ContextMenuOpening;
        }

        private void radVirtualGrid1_ContextMenuOpening(object sender, VirtualGridContextMenuOpeningEventArgs e)
        {
            int i;
            string theMenuItemText;

            if (e.RowIndex == -3 && e.ColumnIndex < 1)
            {
                e.ContextMenu = menu.DropDown; 
            }
        }

        private void radVirtualGrid1_CellValueNeeded(object sender, VirtualGridCellValueNeededEventArgs e)
        {
            e.Value = Guid.NewGuid().ToString();
        }

To reproduce: 

Set the RowSpacing to 10. Press down until the last cell is selected. The view is not scrolled down. 

When you setup a hierarchical RadVirtualGrid and set the UseScrollbarsInHierarchy property to false and use VirtualGridAutoSizeColumnsMode.Fill for the child template, you expect that the column's width is calculated according to the total width of the respective template. Hence, if you shrink or enlarge the grid, the columns will shrink/enlarge respectively. However, if you double click the resize cursor between the column headers you will notice that the best-fit action is performed over the column and its width is adjusted. However, the VirtualGridAutoSizeColumnsMode.Fill setting is not respected and you either can't see all the columns, or you obtain some empty space if the column doesn't need much space.