I receive the following error when databind RadGridView to a list<T> array.
Version Telerik 2009.3.9.1203

Value of '612' is not valid for 'Value'. 'Value' must be between 'Minimum' and 'Maximum'.
Parameter name: Value

Dev Notes:
-----------------------
I am displaying value from sort by date in decending order, as the data comes in in real time. I add new incoming data to the binding
source.

' Add to binding source the peform functions below.

How do i fix this problem? Is there a fix for this in Telerik 2010 Q1?

 

 

Me.rgvTickets.GridElement.BeginUpdate()

 

m_bsTickets.ResetBindings(

 

False)

 

 

 

Me.rgvTickets.EnableHotTracking = True

 

 

 

Me.rgvTickets.GridElement.EndUpdate(True)

 

at Telerik.WinControls.UI.RadScrollBarElement.set_Value(Int32 value)
   at Telerik.WinControls.UI.GridTableElement.UpdateVScrollBarPosition(GridViewRowInfo rowInfo)
   at Telerik.WinControls.UI.GridTableElement.EnsureRowVisible(GridViewRowInfo rowInfo)
   at Telerik.WinControls.UI.GridViewRowInfo.EnsureVisible()
   at Telerik.WinControls.UI.BaseGridNavigator.SetCurrentRow(Boolean shift, Boolean ctrl)
   at Telerik.WinControls.UI.BaseGridNavigator.SelectRow(GridViewRowInfo row)
   at Telerik.WinControls.UI.GridTableElement.UpdateCurrentPosition()
   at Telerik.WinControls.UI.GridViewInfo.SetCurrentRow(GridViewRowInfo row, Boolean setPosition, Boolean shift, Boolean control, Boolean rightMouseButton)
   at Telerik.WinControls.UI.GridViewTemplate.SetCurrentRow(GridViewRowInfo rowInfo)
   at Telerik.WinControls.Data.DataAccessComponent.InitDataGrid()
   at Telerik.WinControls.Data.DataAccessComponent.currencyManager_ListChanged(Object sender, ListChangedEventArgs e)
   at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e)
   at System.Windows.Forms.BindingSource.OnListChanged(ListChangedEventArgs e)
   at StrataGem.frmTicketSummary.LoadTicketSummary(ListProcessedFiles list, Boolean isrunningrealtime)
   at StrataGem.frmTicketSummary.tmrMain_Tick(Object sender, EventArgs e)

Hi

i build a user control that include a GridView and more objects.
i need to display the grid to the user without selecting the first row.
in the DataBindingComplete Event i add this line to unselect row :

this.CurrentRow = null;

when the grid show in the first time it's ok, none of the rows selected.
but when i change the DataSource of the grid, the first row selected !

when i use the debuger i saw that after the DataBindingComplete event run the

SelectionChanged event run too.

 

when i use the debugger in the first time that the form show, I saw that DataBindingComplete event run and after that the SelectionChanged run and after that DataBindingComplete event run again.

And because of that the line that I add (this.CurrentRow = null;) run in the end and none of the row selected.

What can I do to unselect row ?

I whant that the code I write will be in the user control and not in the forms code.

I need to have checkboxes in my treeview, but only at the bottom-most level in the tree.  As far as I know, that means I need to enable checkboxes and then suppress them where I don't want them.  I think that the SetPropertyValue command might be of use, but it isn't obvious how the command is used.  I have not been able to find any examples where it is invoked.

Can anyone tell me how to use it, or provide an alternate method to only show checkboxes on one level of the tree?

Hello

First of all: great update, the Gridview in Q2 2010!
Still, what is causing me headache is the new drag and drop capability:

If I use the code snippets from the samples:


the events only get fired when dragging the column (GridCellElement ) as shown in the example
http://www.telerik.com/community/forums/winforms/gridview/drag-amp-drop-functionalities-to-swap-column.aspx

For the data-bound Gridrows the events do not get fired.

Am I doing something wrong? Is there any kind of documentation for the new drag and drop mechanism?

Thanks


Markus

Guys,

I am facing significant performance issues while using the conditional formatting objects like below.
If I do not format my grid it shows up really fast - using the conditional formatting it takes minutes to load.

The data amount I am loading is around 44000 records (7.500 in the Master, the rest in the childgrid).

Is there something I can do to optimize the performance? At the moment it is nearly unusable.

Here is the code I am referring to:

Ok I have a GridView on my form. The GridView datasource is a DataTable. 
the datatable columns types are:    bool (checkbox), text, text, text.
I set all the grid columns to read only except for the first one, to allow the user to check/uncheck to box. 

I also have a timer that ticks every 7 seconds and refreshes the datatable. 
Everything works fine to this point. 

Within the tick event i save the selected row, and then select it again after the data refresh, so the highlighted row doesn't pop back up to the top. 

private void tTickets_Tick(object sender, EventArgs e)

{

   int selectedrow = gridview.CurrentCell.RowIndex;

   GetData();

   gridview.CurrentRow = gvMassTickets.Rows[selectedrow];

}

 
The problem is, when it does this, column[0] (the check box column) becomes readonly. 
if i comment out the "gridview.CurrentRow = gvMassTickets.Rows[selectedrow];"
it works just fine. 

Hello,

I use the RadCalendar with the Office2010 style. When I activate the row header the calendar week is shown. But when I start my application only the first numer is visible. The width of the row header is to small. So, how can I change the width of the row header.

Best regards

Martin

Hi,

in the RadForms demo application the cells of the calendar control (First Look) have a blue header an are separated with a thin blue lines. In the example code the calendar controls uses a "Scheduler" theme. Is this theme only used inside the demo? I try to get the same visual style in my application, but without success.

Regards

Martin

I think this is an oversight on the MS controls.

Only some controls have a ReadOnly property e.g. the textBox and derivitaves.

For the standard checkbox you can use the AutoCheck property to achieve the same, but the RadCheckbox does not have that property either

Would it be possible to have a 'ReadOnly' property added to all the controls, what, imo, it should do it allow us to look but not touch, e.g. simular to enable, but still allow scrollbars, dropdowns to work, oh and not to change the colour (so users can still read the data and copy it)

Hi,

What I am attempting to do is to detect all changes to appointments, as well as deletions or additions of appointments. New appointments, deletions of appointments, or changes to appointments must be saved to the Appointments table of our database.

My approach has been to use an event handler for the RadScheduler.Appointments.CollectionChanged event. Of course, the RadScheduler's Appointment collection changes when you initially load it, so you have to handle that case. But I find my event handler being called when I mouse-click an appointment in the scheduler.

Is my approach all wrong?