Repro-steps:
Expected behavior:
Observed behavior:
Please observe that Grid.UserAddedRow is not handled, but since we cannot even see the AddNewRow, it is not required for this bug.
public partial class TestForm: Form
{
private readonly DataView _view;
public TestForm()
{
InitializeComponent();
_view = new DataView(LoadTable(true));
_grid.ColumnCount = _view.Table.Columns.Count;
_grid.RowCount = _view.Count;
_grid.AllowAddNewRow = true;
_grid.SelectionMode = VirtualGridSelectionMode.FullRowSelect;
}
static private DataTable LoadTable(bool fill)
{
var table = new DataTable();
table.Columns.Add("Number", typeof(int));
if (fill)
for(int i = 0; i < 20; i++)
table.Rows.Add(i);
return table;
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this._grid = new Telerik.WinControls.UI.RadVirtualGrid();
((System.ComponentModel.ISupportInitialize)(this._grid)).BeginInit();
this.SuspendLayout();
//
// _grid
//
this._grid.Dock = System.Windows.Forms.DockStyle.Fill;
this._grid.Location = new System.Drawing.Point(0, 0);
this._grid.MultiSelect = true;
this._grid.Name = "_grid";
this._grid.SelectionMode = Telerik.WinControls.UI.VirtualGridSelectionMode.FullRowSelect;
this._grid.Size = new System.Drawing.Size(800, 450);
this._grid.TabIndex = 0;
this._grid.CellValueNeeded += new Telerik.WinControls.UI.VirtualGridCellValueNeededEventHandler(this._grid_CellValueNeeded);
this._grid.UserDeletedRow += new Telerik.WinControls.UI.VirtualGridRowsEventHandler(this._grid_UserDeletedRow);
//
// TestForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(800, 450);
this.Controls.Add(this._grid);
this.Name = "TestForm";
this.Text = "TestForm";
((System.ComponentModel.ISupportInitialize)(this._grid)).EndInit();
this.ResumeLayout(false);
}
#endregion
private Telerik.WinControls.UI.RadVirtualGrid _grid;
private void _grid_CellValueNeeded(object sender, Telerik.WinControls.UI.VirtualGridCellValueNeededEventArgs e)
{
if (e.ColumnIndex < 0)
return;
if (e.RowIndex < 0)
{
e.FieldName = _view.Table.Columns[e.ColumnIndex].ColumnName;
if (e.RowIndex == RadVirtualGrid.HeaderRowIndex)
e.Value = e.FieldName;
}
else if (e.RowIndex < _view.Count)
{
e.Value = _view[e.RowIndex][e.ColumnIndex];
}
}
private void _grid_UserDeletedRow(object sender, Telerik.WinControls.UI.VirtualGridRowsEventArgs e)
{
var rowIndexes = e.RowIndices.Distinct().OrderByDescending(i => i).ToList(); // Off topic: I have seen duplicate row indexes in this row collection. And unsorted. Is that by design?
if (rowIndexes.Count == _view.Count)
{
_view.Table.Rows.Clear();
}
else
{
foreach(var index in rowIndexes)
_view[index].Delete();
}
_grid.RowCount = _view.Count;
}
}
RadVirtualGrid does not support (nullable) booleans out of the box.
There are several pages to work around this issues, like:
In my humble opinion this should be supported by default. Why?
In my mind I think of how a meeting would have been while designing the RadVirtualGrid.
;-)
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);
}
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:
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:
Please, implement the support for HTML.
RadVirtualGridElement.Paste does not support pasting into new rows.
I want to override RadVirtualGridElement.Paste to allow to to paste into new rows. Except when I do so, the methods to retrieve information from the clipboard (GetHtmlData/GetTextData/GetCsvData ) are private.
So now I have one request, two solutions:
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.
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.
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
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 run the attached sample project and navigate with the left/right arrows as it is demonstrated in the gif file.
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();
}
It is difficult to replicate the issue and it is not always reproduced. When using the splitter between columns[1] and columns[2] to resize column[1] I found out that releasing the mouse button doesn't cause the splitter to be released, even when clicking on the grid. It seems to work ok once or twice but once it fails then keeps failing. Workaround: private void radVirtualGrid1_MouseUp(object sender, MouseEventArgs e) { if (e.Button == System.Windows.Forms.MouseButtons.Left) { this.radVirtualGrid1.Cursor = Cursors.Default; } }
Hi,
I have a problem with the expansion of the last row.
After Row Expanding and Row Collapsing the last or second last row, the last row is not visible because it seems that there I some kind of lock on the scrollbar : it doesn’t scroll down neither with the mouse wheel nor with the button so it is not possible to move on the last row.
If instead you scroll up and then down the row became visible again.
In the attached example project.
Regards