1. Drag a RadGridView to a form and dock it to fill the form.
2. Create and set a ColumnGroupsViewDefinition to the grid
3. Add data and run the project.
4. Resize the form and you will see that grid view layout would not look properly.
Also if your resize a column group only the first column in the group is resized while all others retain their widths.

Work around:
void radGridView1_SizeChanged(object sender, EventArgs e)
{
    this.InvalidateGridLayout();
}
 
private void InvalidateGridLayout()
{
    this.bllGridView1.TableElement.ViewElement.RowLayout.InvalidateLayout();
    this.bllGridView1.TableElement.InvalidateMeasure(true);
    this.bllGridView1.TableElement.UpdateLayout();
}

Currently one can only set theme of the RadPrintPreviewDialog.

1. Create a new project with RadGridView and setup binding
2. Enable filtering
3. On a button click call the PrintPreview method
4. Run the application and click the button
5. Close the print dialog and click on a cell

Selfreference:
Item.ID
Item.Propertys.ParentID 

If Parent ID == null then since the new Update I will recive :


bei Telerik.WinControls.UI.GridViewSelfReferenceComparer.Compare(GridViewRowInfo x, GridViewRowInfo y) 

bei Telerik.Collections.Generic.AvlTree`1.LastIndex(ValueT value) 

bei Telerik.Collections.Generic.AvlTree`1.InsertWithDuplicates(ValueT value) 

bei Telerik.Collections.Generic.AvlTree`1.Add(ValueT item) 

bei Telerik.WinControls.UI.GridViewSelfReferenceDataProvider.Refresh() 

bei Telerik.WinControls.UI.GridViewTemplate.Telerik.WinControls.Data.IDataItemSource.Initialize() 

bei Telerik.WinControls.Data.RadListSource`1.Initialize() 

bei Telerik.WinControls.Data.RadListSource`1.Bind(Object dataSource, String dataMember) 

bei Telerik.WinControls.Data.RadListSource`1.set_DataSource(Object value) 

bei Telerik.WinControls.UI.GridViewTemplate.set_DataSource(Object value) 

bei Telerik.WinControls.UI.RadGridView.set_DataSource(Object value) 

bei LocalSimulation.Form1.worker_RunWorkerCompleted(Object sender, RunWorkerCompletedEventArgs e) in D:\Programming\REPOSITORY\trunk\AAARISK WEBAPP\LocalSimulation\Form1.cs:Zeile 142. 

bei System.ComponentModel.BackgroundWorker.OnRunWorkerCompleted(RunWorkerCompletedEventArgs e) 

bei System.ComponentModel.BackgroundWorker.AsyncOperationCompleted(Object arg) 



So I changed Parent = null to Parent =0 and it works .

ADD. RadGridView - add support for scrolling the grid while dragging in SelectionMode = CellSelect

ADD. RadGridView - add ability to move the column with the expanders to different position then the first one

Resolution: 
Set the SelfReferenceExpanderColumn property of the MasterTemplate to the preferred column. Here is the code snippet: 
radGridView1.MasterTemplate.SelfReferenceExpanderColumn = this.radGridView1.MasterTemplate.Columns[4];

1. The RowsChanging event is not fired when rows are deleting in multi-selection mode.
2. The last selected row is already deleted in the RowsChanging event in multi-cell selection mode.

The synchronization mechanism is invalid when sorting is applied and notification was received from external data source object.

Scrolling by mouse wheel in hierarchical RadGridView causes exception when Microsoft IntelliPoint is installed and configured for 25 vertical scrolling speed.

FIX. RadGridView - UserAddedRow is not fired when the AddNewRowPosition is Bottom and you tab through the cells to add the row. The result is that the row is added but the event is not fired.

Currently there is no way to sort group rows in RadGridView.

Workaround: use the API of RadGridView to delete the row

Please view the attached project for details

Gridview doesn't update binding source current position after sorting and selecting row with the same offset position from the begining

Chechbox editor issue with value update and BeginEdit operation for next cell

If all rows are expanded in hierarchy, the last scroll position of the vertical scroll bar does not show all available rows from the child template.

The columns are not re sized proportionally when the RadGridView is re sized in auto-size column mode fill.

Exception is thrown if the data source of second template is changed and rows are expanded in hierarchy.

The first row overlaps the GridTableElement's top border when group panel and column's headers are invisible.

The DefaultValueAttribute of Format and FormatInfo properties of GridViewDataColumn causes exceptions when load layout is performed.
Comment: this is an issue inside .Net framework.