Hi. I'm working with RadPropertyGrid for WinForms. 
I have some problem with PropertyValueChanged Event
So, how can you see, In my project I need show MessageBox with some Exception. When I changed bool value (itemC) in propertyGrid, MessegeBox is shown once and it's ok, but when I changed string or int value PropertyValueChanged event began twice (second event began in line "MessageBox.Show(exc.Message); ")
Maybe you can explain me what I do wrong. Thanks

Hi,

i need to draw two stacked bar series for a single date. my exact requirement is like:

i have dates on X-axis and on Y-axis i have double values.

totally i have 5 serieses:

series1,series2,series3,series4,series5

i need to draw a stacked bar for series1,2,3 and one more stacked bar series for series 4,5 on stacked bar chart.

it looks some thing like below:
 |           ---
 |          |S 3 |                 
 |          ---  ---
 |          | S2 || S5 |
 |          ---  ---
 |          |S1 || S 4|
 |------------------------------------------------------------------------------
              june5              june6

i am not able to paste any image that's why i have given rough sketch.hope u understand the requirement.

is this possible? if so please provide me some sample code.

Help is highly appreciated.

Regards,
kiran

Hello
When I click on the cell of the GRID I got the following error from MDA

A call to PInvoke function 'Telerik.WinControls.GridView!Telerik.WinControls.UI.RadGridViewAccessibleObject::NotifyWinEvent' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.

I am using the latest Q1 2012 SP1, in NET4.0

Any ideas... I am completly blind in this one.

( I have already turn to x86 to compile)

Hi... im creating a RadListBox at runtime with a win app and it creates with the correct items but... I cant select any of them!!! =S... thats really weird and I've been trying many options... can you help me with that issue?

here's my code.

RadListBox

lista = new RadListBox();

for

(int j = 0; j < listaCuartoSel.Count; j++)

{

RadListBoxItem item = new RadListBoxItem();

item.Text = listaCuartoSel[j].Nombre;

string pathImagen = "ImagePath";

Image imagenCuarto = Image.FromFile(pathImagen);

item.Image = imagenCuarto;

item.Alignment =

ContentAlignment.TopLeft;

item.ImageAlignment =

ContentAlignment.MiddleRight;

item.TextImageRelation =

TextImageRelation.ImageBeforeText;

lista.Items.Add(item);

}

lista.Enabled =

true;

lista.Virtualized =

true;

lista.IsAccessible =

true;

lista.SelectedIndex = 0;

lista.Width = 300;

this

.Controls.Add(lista);

hi all

Is there a way to display the distinct values calculated after each column is filtered and I only want the value that still remain in the view?

i am trying to select 92000 records from the database. obivously, it will be a while
but instead of displaying each bar every second or seomthing, the radprogressbar just wait until everything is finished and then display it in full bar. how can i stop that how can i make it the progress bar fill up slower? 

 

While rs.Read

 

RadProgressBar2.Value1 = i

RadProgressBar2.Text =

"Record " & i

 

i = i + 1

 

End While

please help thank you

 

Hi,

I have a checkbox control in Grid and it is not returning consistent values sometimes it is returning On/Off instead of True/False.
This scenario is rare not coming frequently.

I would be looking , it should return True/False always.

What I am using in code

 

Private Sub rdgrdvSeachAddUpt_CellBeginEdit(ByVal sender As System.Object, ByVal e As Telerik.WinControls.UI.GridViewCellCancelEventArgs) Handles rdgrdvSeachAddUpt.CellBeginEdit

 

 

Dim lobjMessage As New Message

 

 

Try

 

 

''Check if it is a checkbox control in grid

 

 

Dim chEditor As RadCheckBoxEditor = TryCast(e.ActiveEditor, RadCheckBoxEditor)

 

 

If chEditor IsNot Nothing Then

 

 

If e.Column.Name = "radchkDelete" Then

 

 

'If yes check/uncheck checkbox item..it is for delete column

 

 

Dim isChecked As Boolean = Convert.ToBoolean(chEditor.Value)

 

rdgrdvSeachAddUpt.CurrentRow.Cells(

"radchkDelete").Value = Not isChecked

 

 

End If

 

 

End If

 

 

 

Catch objEx As Exception

 

Logger.Log(objEx, lobjMessage)

UIHelper.ShowMessage(lobjMessage)

 

Finally

 

lobjMessage =

Nothing

 

 

End Try

 

 

End Sub

 

    I was trying to figure out how you did the theme picker in the "RadControls for WinForms Examples". I can't even figure out how you did the splash screen and the main form. When I look up the "Theme" sample for a control like grid view the dropdown button isn't pressent on the form. I tried searching the solution for just about everything I could think of to find the code for this.
Could you point me in the right direction?

Hi,

I am getting an error(see attached files) while trying to select item from grid dropdownlist.
Step to reproduce:
1. This is occuring when we trying to select an item from dropdownlist very fast e.g 
    - Click on add new row or click on dropdown cell and press B as I have item starting from B and then click outside of the row(somewhere in grid) do it repeatatively.Try to repeat the steps as fast as possible.
2.After few rows added you will get attached error which is not going inside try and catch.

I am using below grid events:
1.

 

Private Sub rdgrdvSeachAddUpt_CellBeginEdit(ByVal sender As System.Object, ByVal e As Telerik.WinControls.UI.GridViewCellCancelEventArgs) Handles rdgrdvSeachAddUpt.CellBeginEdit

 

 

Dim lobjMessage As New Message

 

 

Try

 

 

''Find out dropdown control in Grid

 

 

Dim editor = TryCast(e.ActiveEditor, RadDropDownListEditor)

 

 

If editor IsNot Nothing Then

 

 

''If yes find out its element

 

 

Dim editorElement = TryCast(editor.EditorElement, RadDropDownListEditorElement)

 

 

If editorElement IsNot Nothing Then

 

 

''If its column name is radcmbCriteriaType

 

 

If e.Column.Name = "radcmbCriteriaType" Then

 

 

''Add handler to get dropdown event

 

 

AddHandler editorElement.SelectedIndexChanged, AddressOf editorElement_SelectedIndexChanged

 

 

End If

 

 

End If

 

 

End If

 

2.rdgrdvSeachAddUpt_CellEndEdit
3.rdgrdvSeachAddUpt_CellValueChanged
4.rdgrdvSeachAddUpt_Click
5.rdgrdvSeachAddUpt_UserDeletingRow
===See below as i WAS not able to attched files

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at Telerik.WinControls.Data.RadListSource`1.get_Item(Int32 index)
   at Telerik.WinControls.Data.RadCollectionView`1.get_Item(Int32 index)
   at Telerik.WinControls.UI.RadListDataItemCollection.get_Item(Int32 index)
   at Telerik.WinControls.UI.RadListElement.FindStringNonWrapping(String s, Int32 startIndex)
   at Telerik.WinControls.UI.RadListElement.ProcessKeyboardSearch(Char character)
   at Telerik.WinControls.UI.RadDropDownListElement.ProccesListFastNavigationInDropDownListMode(Char pressedChar)
   at Telerik.WinControls.UI.RadDropDownListElement.OnKeyPress(RadDropDownListEditableAreaElement sender, KeyPressEventArgs e)
   at Telerik.WinControls.UI.RadDropDownListElement.NotifyOwner(PopupEditorNotificationData notificationData)
   at Telerik.WinControls.UI.RadDropDownListEditableAreaElement.textBox_KeyPress(Object sender, KeyPressEventArgs e)
   at Telerik.WinControls.RadItem.OnKeyPress(KeyPressEventArgs e)
   at Telerik.WinControls.RadItem.DoKeyPress(KeyPressEventArgs e)
   at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
   at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)
   at Telerik.WinControls.RadItem.RaiseKeyPress(KeyPressEventArgs e)
   at Telerik.WinControls.ComponentInputBehavior.OnKeyPress(KeyPressEventArgs e)
   at Telerik.WinControls.RadControl.OnKeyPress(KeyPressEventArgs e)
   at Telerik.WinControls.UI.RadGridView.OnKeyPress(KeyPressEventArgs e)
   at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
   at System.Windows.Forms.Control.ProcessKeyMessage(Message& m)
   at System.Windows.Forms.Control.WmKeyChar(Message& m)
   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.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

************** Loaded Assemblies **************
mscorlib
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3625 (GDR.050727-3600)
    CodeBase: file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
QECGWindows
    Assembly Version: 2.6.0.6
    Win32 Version: 02.06.000.006
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/QECGWindows.exe
----------------------------------------
Quintiles.ECG.UI.Infrastructure
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/Quintiles.ECG.UI.Infrastructure.DLL
----------------------------------------
Microsoft.Practices.CompositeUI.WinForms
    Assembly Version: 1.0.51205.0
    Win32 Version: 1.0.51205.0
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/Microsoft.Practices.CompositeUI.WinForms.DLL
----------------------------------------
Microsoft.Practices.CompositeUI
    Assembly Version: 1.0.51205.0
    Win32 Version: 1.0.51205.0
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/Microsoft.Practices.CompositeUI.DLL
----------------------------------------
Microsoft.Practices.ObjectBuilder
    Assembly Version: 1.0.51206.0
    Win32 Version: 1.0.51206.0
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/Microsoft.Practices.ObjectBuilder.DLL
----------------------------------------
System.Windows.Forms
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3623 (GDR.050727-3600)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3631 (GDR.050727-3600)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Configuration
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3082 (QFE.050727-3000)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Security
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3613 (GDR.050727-3600)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Security/2.0.0.0__b03f5f7f11d50a3a/System.Security.dll
----------------------------------------
System.Data
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_32/System.Data/2.0.0.0__b77a5c561934e089/System.Data.dll
----------------------------------------
QECGBO
    Assembly Version: 2.6.0.6
    Win32 Version: 02.06.000.006
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/QECGBO.DLL
----------------------------------------
Quintiles.ECG.CalECGControl
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/Quintiles.ECG.CalECGControl.DLL
----------------------------------------
QECGCommon
    Assembly Version: 2.6.0.5
    Win32 Version: 02.06.000.006
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/QECGCommon.DLL
----------------------------------------
QECG.Common.Infrastructure
    Assembly Version: 2.6.0.6
    Win32 Version: 02.06.000.006
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/QECG.Common.Infrastructure.DLL
----------------------------------------
Microsoft.VisualBasic
    Assembly Version: 8.0.0.0
    Win32 Version: 8.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Microsoft.VisualBasic/8.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------
Telerik.WinControls.UI
    Assembly Version: 2011.3.11.1116
    Win32 Version: 2011.3.11.1116
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Telerik.WinControls.UI/2011.3.11.1116__5bb2a467cbec794e/Telerik.WinControls.UI.dll
----------------------------------------
Telerik.WinControls
    Assembly Version: 2011.3.11.1116
    Win32 Version: 2011.3.11.1116
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Telerik.WinControls/2011.3.11.1116__5bb2a467cbec794e/Telerik.WinControls.dll
----------------------------------------
QECG.Common.Infrastructure.DataAccess
    Assembly Version: 2.6.0.6
    Win32 Version: 02.06.000.006
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/QECG.Common.Infrastructure.DataAccess.DLL
----------------------------------------
Oracle.DataAccess
    Assembly Version: 2.112.2.0
    Win32 Version: 2.112.2.0
    CodeBase: file:///C:/WINDOWS/assembly/GAC_32/Oracle.DataAccess/2.112.2.0__89b483f429c47342/Oracle.DataAccess.dll
----------------------------------------
System.Transactions
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_32/System.Transactions/2.0.0.0__b77a5c561934e089/System.Transactions.dll
----------------------------------------
System.EnterpriseServices
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.3053 (netfxsp.050727-3000)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_32/System.EnterpriseServices/2.0.0.0__b03f5f7f11d50a3a/System.EnterpriseServices.dll
----------------------------------------
Telerik.WinControls.GridView
    Assembly Version: 2011.3.11.1116
    Win32 Version: 2011.3.11.1116
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Telerik.WinControls.GridView/2011.3.11.1116__5bb2a467cbec794e/Telerik.WinControls.GridView.dll
----------------------------------------
Quintiles.Windows
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/ECGDEV/Development%202.4/QECGWindows/QECGGUI/bin/Debug/Quintiles.Windows.DLL
----------------------------------------
System.Core
    Assembly Version: 3.5.0.0
    Win32 Version: 3.5.30729.1 built by: SP
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Core/3.5.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
TelerikCommon
    Assembly Version: 2011.3.11.1116
    Win32 Version: 2011.3.11.1116
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/TelerikCommon/2011.3.11.1116__5bb2a467cbec794e/TelerikCommon.dll
----------------------------------------
rn3-buiv
    Assembly Version: 2011.3.11.1116
    Win32 Version: 2.0.50727.3631 (GDR.050727-3600)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

I have created a RadScheduler / RadSchedulerNavigator on a form.   On the Form_Load Event I create a DataTable from a SQL database, add the DataTable to a DataSet and then map the values to my database.

Dim AppointmentDT As DataTable = SQLRowToDt(connStr, "Select * From AppointmentTable")

        ' Appointment Dataset
        Dim AppointmentDataSet As DataSet = New DataSet()
        Dim AppointmentDTCopy As DataTable = AppointmentDT.Copy
        AppointmentDTCopy.TableName = "AppointmentDT"
        AppointmentDataSet.Tables.Add(AppointmentDTCopy)

        ' Appointment Mappings
        Dim appointmentMappingInfo As New AppointmentMappingInfo()
        appointmentMappingInfo.Start = "StartTime"
        appointmentMappingInfo.End = "EndTime"
        appointmentMappingInfo.Summary = "Subject"
        appointmentMappingInfo.Description = "Description"
        appointmentMappingInfo.Location = "Location"
        appointmentMappingInfo.BackgroundId = "Background"
        appointmentMappingInfo.StatusId = "StatusID"
        appointmentMappingInfo.RecurrenceRule = "RecurrenceRule"
        SchedulerBindingDataSource1.EventProvider.Mapping = appointmentMappingInfo
        SchedulerBindingDataSource1.EventProvider.DataSource = AppointmentDataSet.Tables("AppointmentDT")
        RadScheduler1.DataSource = SchedulerBindingDataSource1 

I can add / edit / delete / save back to the database the series just fine.  However if I attempt to edit or delete a single occurrence I get a NullReferenceException.

System.NullReferenceException was unhandled
  Message="Object reference not set to an instance of an object."
  Source="Telerik.WinControls.Scheduler"
  StackTrace:
       at Telerik.WinControls.UI.Scheduler.BindingProviderBase`1.FindDataSourceProperty(SchedulerMapping mapping)
       at Telerik.WinControls.UI.SchedulerBindingDataSource.EventBindingProvider.GetExceptionList(Object dataItem)
       at Telerik.WinControls.UI.SchedulerBindingDataSource.EventBindingProvider.InsertCore(IEvent itemToInsert)
       at Telerik.WinControls.UI.Scheduler.BindingProviderBase`1.Insert(T itemToInsert)
       at Telerik.WinControls.UI.RadScheduler.OnAddAppointments(IList list)
       at Telerik.WinControls.UI.RadScheduler.appointments_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.Data.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.Data.ObservableCollection`1.NotifyListenersCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.Data.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.UI.SchedulerAppointmentCollection.OnExceptionsCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.Data.ObservableCollection`1.NotifyListenersCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.Data.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.Data.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedAction action, Object item, Int32 index)
       at Telerik.WinControls.Data.ObservableCollection`1.InsertItem(Int32 index, T item, Action`1 approvedAction)
       at Telerik.WinControls.Data.ObservableCollection`1.InsertItem(Int32 index, T item)
       at Telerik.WinControls.UI.SchedulerAppointmentCollection.InsertItem(Int32 index, IEvent item)
       at System.Collections.ObjectModel.Collection`1.Add(T item)
       at Telerik.WinControls.UI.SchedulerUIHelper.DeleteAppointment(IEvent appointment, RadScheduler scheduler)
       at Telerik.WinControls.UI.Scheduler.Dialogs.EditAppointmentDialog.OnDeleteButtonClicked()
       at System.Windows.Forms.Control.OnClick(EventArgs e)
       at Telerik.WinControls.RadControl.OnClick(EventArgs e)
       at Telerik.WinControls.UI.RadButtonBase.buttonElement_Click(Object sender, EventArgs e)
       at Telerik.WinControls.RadItem.OnClick(EventArgs e)
       at Telerik.WinControls.UI.RadButtonItem.OnClick(EventArgs e)
       at Telerik.WinControls.RadItem.DoClick(EventArgs e)
       at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e)
       at Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at Telerik.WinControls.RadControl.WndProc(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(Int32 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.Form.ShowDialog(IWin32Window owner)
       at Telerik.WinControls.UI.Scheduler.Dialogs.EditAppointmentDialog.Telerik.WinControls.UI.Scheduler.Dialogs.IEditAppointmentDialog.ShowDialog()
       at Telerik.WinControls.UI.RadScheduler.ShowAppointmentEditDialog(IEvent appointment, Boolean recurringAppointment)
       at Telerik.WinControls.UI.RadScheduler.editAppointment_Click(Object sender, EventArgs e)
       at Telerik.WinControls.RadItem.OnClick(EventArgs e)
       at Telerik.WinControls.UI.RadButtonItem.OnClick(EventArgs e)
       at Telerik.WinControls.RadItem.DoClick(EventArgs e)
       at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e)
       at Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at Telerik.WinControls.RadControl.WndProc(Message& m)
       at Telerik.WinControls.UI.RadPopupControlBase.WndProc(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(Int32 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 Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
       at MartzSchedule.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

This is my first time using RadScheduler, any help you can give me would be greatly appreciated.

Thanks