Questions on UI for WinForms Forum

1 answer

132 views

SelectedNodes.Clear Not working when MultiSelect = false

Hi,

Treeview.SelectedNodes.Clear Not working when MultiSelect = false

Don't know if this is by design or a bug but in my opinion, when you invoke Treeview.SelectedNodes.Clear whatever is selected should no longer be selected, regardless of the MultiSelect setting.

In addition, if MultiSelect = false and you invoke Nodes.Clear(), SelectedNodes still contains an object. SelectedNodes shoud clear as well.

-Kim

Treeview

answered on 05 Nov 2013

1 answer

148 views

Event for saving an EXISTING appointment

On the save of the appointment I need to differentiate between the save of new appointment vs. an existing appointment.

I am aware that the save of a new appointment triggers the following event:

this.radSchedulerControl.AppointmentAdded += new EventHandler<AppointmentAddedEventArgs>(radSchedulerControl_AppointmentAdded);

And the save of the existing event triggers the following event with the action of the event = "ItemChanged"

this.radSchedulerControl.Appointments.CollectionChanged += new Telerik.WinControls.Data.NotifyCollectionChangedEventHandler(Appointments_CollectionChanged);
....however the problem with this event is that it get triggered multiple times based on what was changed for on the existing appointment.

A different thread suggested using the ApplySettingsToEvent function in the CustomAppointmentEditDialog class when saving an appointment to add my custom logic. However, in ApplySettingsToEvent I could not determine how to differentiate when a new Appointment is created vs an existing one is saved since this function gets executed on both the creation of a new appointment and the save of an existing.

Your help in determining how to execute custom logic only on the save of an existing appointment and have it triggered only once would be appreciated.

Thanks!
Vijay

Scheduler and Reminder

answered on 04 Nov 2013

3 answers

133 views

Always use Appointment edit dialog

Is there an option in the RadScheduler to force the user to use the edit dialog?

Default the user is able to type the appointments directly in the scheduler. In this case the only field that is being used is the Subject.
I created a custom edit dialog, and added a few fields. These fields are mandatory, and to fill this fields the user needs to use the edit dialog.

So is this possible?

Scheduler and Reminder

answered on 04 Nov 2013

5 answers

173 views

Gantt view Time line Format.

Is it possible to view large timeline events in Gantt view.
with Year as uppertimelineformat and Month as LowertimeLineformat

some thing like:
2010 2011 2012 2013
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12

can you suggect the code snippet for this.

GanttView

answered on 04 Nov 2013

1 answer

109 views

possibility of rotation

Hi,
Is there any possibility to rotate the document in PdfViewer (winforms)?
And about zoom, it is possible programmatically, manipulate these?

Thanks.

PdfViewer and PdfViewerNavigator

answered on 04 Nov 2013

1 answer

512 views

Keep OldValue when cell is not valid in CellValidating event

I want to lose focus and keep e.OldValue if cell is not valid in CellValidating event. Similar behavior to pressing ESC.
I wrote this code:

private object _cachedOldValue;

private bool _isValidValue;

private void radGridViewIssues_CellValidating(object sender, CellValidatingEventArgs e)

{

_isValidValue = true;

RadGridView radGridView = sender as RadGridView;

if (radGridView == null || !radGridView.IsInEditMode)

{

return;

}

ValidationResult validationResult = _presenter.ValidateCurrentValue(e.Column.Name, e.Value);

if (!validationResult)

{

_isValidValue = false;

_cachedOldValue = e.OldValue;

}

private void radGridViewIssues_CellValidated(object sender, CellValidatedEventArgs e)

{

RadGridView radGridView = sender as RadGridView;

if (radGridView == null)

{

return;

}

if (!_isValidValue)

{

radGridView.CurrentCell.Value = _cachedOldValue;

}

My column has float? datatype. It works with digits, but throws an exception, when I write some letters.

How can I achieve the desired functionality?

GridView

answered on 04 Nov 2013

3 answers

142 views

making resource a mandatory field

Hello,

I read of someone removing the (none) and (any) options from the resources dropdown on the AppointmentEdit form, what I like is to keep (none) and if the user does not select a resource other than (none) prompt the user to select a valid resource. I was trying the ApplySettingsToEvent method and it does not look to be firing when I close the Apppointment edit form. Using VS2008 RadScheduler 2012.1.321.20 .

Thanks

Scheduler and Reminder

answered on 01 Nov 2013

3 answers

90 views

Problem with "Check All" in the header cell for a GridViewCheckBoxColumn

I've got a problem with the VB version of the Check All code from the knowledge base:

http://www.telerik.com/support/kb/winforms/gridview/add-check-uncheck-all-check-box-in-the-header-cell.aspx

The difference in my case is that I add the column programmatically to a grid, and it's the last column in the grid.

The code works great unless the grid view is wide enough to cause a horizontal scroll bar. When I scroll sideways, back and forth a few times, I get a NullReferenceException when trying to check or uncheck a check box on an individual record. Screenshot of error below. Full stacktrace is below.

Anyone else have this problem? Any suggestions?

System.NullReferenceException was unhandled

HResult=-2147467261

Message=Object reference not set to an instance of an object.

Source=ProductPricingModeller.WinForms

StackTrace:

at ProductPricingModeller.WinForms.UseCurrentPriceHeaderCellElement.GridControl_ValueChanged(Object sender, EventArgs e) in E:\CODE\JssProductPricingModeller\ProductPricingModeller.WinForms\UseCurrentPriceHeaderCellElement.vb:line 201

at System.EventHandler.Invoke(Object sender, EventArgs e)

at Telerik.WinControls.UI.RadGridView.OnValueChanged(Object sender, EventArgs e)

at Telerik.WinControls.UI.EventDispatcher.RaiseEvent[T](Object eventKey, Object sender, T args)

at Telerik.WinControls.UI.BaseGridEditor.OnValueChanged()

at Telerik.WinControls.UI.RadCheckBoxEditor.SetValue(Object value)

at Telerik.WinControls.UI.RadCheckBoxEditor.set_Value(Object value)

at Telerik.WinControls.UI.RadCheckBoxEditor.ToggleState()

at Telerik.WinControls.UI.RadCheckBoxEditorElement.OnMouseUp(MouseEventArgs e)

at Telerik.WinControls.RadElement.OnCLREventsRise(RoutedEventArgs args)

at Telerik.WinControls.RadElement.OnBubbleEvent(RadElement sender, RoutedEventArgs args)

at Telerik.WinControls.RadItem.OnBubbleEvent(RadElement sender, RoutedEventArgs args)

at Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

at Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)

at Telerik.WinControls.RadElement.DoMouseUp(MouseEventArgs e)

at Telerik.WinControls.RadElement.CallDoMouseUp(MouseEventArgs e)

at Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e)

at Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e)

at Telerik.WinControls.UI.RadGridView.OnMouseUp(MouseEventArgs e)

at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

at System.Windows.Forms.Control.WndProc(Message& m)

at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

at Telerik.WinControls.RadControl.WndProc(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)

at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.Run(ApplicationContext context)

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)

at ProductPricingModeller.WinForms.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81

at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)

at System.AppDomain.nExecuteAssembly(RuntimeAssembly assembly, String[] args)

at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)

at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()

at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ThreadHelper.ThreadStart()

InnerException:

GridView

answered on 01 Nov 2013

3 answers

160 views

RadTreeView Scrollbar fall with NullReferenceExceprion

Hi Telerik,

There is a bug with RadTreeView, and scrollbar.

Download source files:
https://dl.dropboxusercontent.com/u/48038910/TreeScrollsCrash.rar

Steps to reproduce the bug:

Run attached application;
Push fill button;
Scroll tree to the end;
Push delete button

Program crashes with null reference exception.

Treeview

answered on 31 Oct 2013

1 answer

98 views

Spell Checker Ignore Button

I’ve got a problem with the RadSpellChecker in VB

After calling “RadSpellChecker1.Check” with a standard “RadTextBoxControl”, pressing the ignore button repeatedly checks the first misspelled word and does not progress through the check. It does not move on to the next misspelt word and effectively loops.

If I change words I can get to the end of the check, cancel quits the check but ignore does appear to work as I expect

Has anyone seen this before and can suggest a solution

General Discussions

answered on 31 Oct 2013