Questions on UI for WinForms Forum

4 answers

228 views

Filtering in RadGridView with GridViewMultiComboBoxColumn

Hi,

I am having problems with using MultiComboboxes in GridView while using the filter bar.
Normal editing is ok after I have handled the RadGridView1_CellEditorInitialized event
If I click on the filter bar column and then select a value it throws this error:

System.Reflection.TargetInvocationException was unhandled

Message=Exception has been thrown by the target of an invocation.

Source=mscorlib

StackTrace:

at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)

at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

at System.Delegate.DynamicInvokeImpl(Object[] args)

at System.Delegate.DynamicInvoke(Object[] args)

at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)

at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)

at System.Threading.ExecutionContext.runTryCode(Object userData)

at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode,

Object userData)

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

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

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

at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)

at System.Windows.Forms.Control.InvokeMarshaledCallbacks()

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

InnerException: System.NullReferenceException

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

Source=Telerik.WinControls.GridView

StackTrace:

at Telerik.WinControls.UI.ScrollableRowsContainerElement.RemoveElement(Int32 position)

at Telerik.WinControls.UI.BaseVirtualizedContainer`1.MeasureElements()

at Telerik.WinControls.UI.BaseVirtualizedContainer`1.MeasureOverride(SizeF availableSize)

at Telerik.WinControls.UI.ScrollableRowsContainerElement.MeasureOverride(SizeF availableSize)

at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)

at Telerik.WinControls.RadElement.Measure(SizeF availableSize)

at Telerik.WinControls.UI.RowsContainerElement.MeasureOverride(SizeF availableSize)

at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)

at Telerik.WinControls.RadElement.Measure(SizeF availableSize)

at Telerik.WinControls.UI.ScrollViewElement`1.MeasureView(SizeF availableSize)

at Telerik.WinControls.UI.ScrollViewElement`1.MeasureOverride(SizeF availableSize)

at Telerik.WinControls.UI.GridTableElement.MeasureOverride(SizeF availableSize)

at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)

at Telerik.WinControls.RadElement.Measure(SizeF availableSize)

at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayout()

at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayoutCallback(ILayoutManager manager)

InnerException:

the InnerException shows a System.NullReferenceException so I tried to force the filter value by handling the editor_TextChanged event, the code runs but the error is still thrown, code below:

Private Sub RadGridView1_CellEditorInitialized(sender As Object, e As Telerik.WinControls.UI.GridViewCellEventArgs) Handles RadGridView1.CellEditorInitialized

    Try

        Dim editor As Telerik.WinControls.UI.RadMultiColumnComboBoxElement = TryCast(e.ActiveEditor, Telerik.WinControls.UI.RadMultiColumnComboBoxElement)

        If editor IsNot Nothing AndAlso editor.Columns IsNot Nothing Then

            With editor

                If .ValueMember = "pkPostID" Then

                    .Columns("pkPostID").IsVisible = False

                    .Columns("tPostUPN").HeaderText = "UPN"

                    .Columns("tJobTitleName").HeaderText = "Job Title"

                    .Columns("dtPostStart").HeaderText = "Start Date"

                    .Columns("dtPostEnd").HeaderText = "End Date"

                ElseIf .ValueMember = "pkEmployeeID" Then

                    .Columns("pkEmployeeID").IsVisible = False

                    .Columns("lEmployeeNumber").HeaderText = "Emp Num"

                    .Columns("tEmployeeFirstName").HeaderText = "First Name"

                    .Columns("tEmployeeLastName").HeaderText = "Last Name"

                End If

                .AutoSizeDropDownToBestFit = True

                .AutoFilter = True

                RemoveHandler editor.TextChanged, AddressOf editor_TextChanged

                AddHandler editor.TextChanged, AddressOf editor_TextChanged

            End With

        End If

    Catch ex As Exception

        Call MessageBox.Show(ex.Message)

    End Try

End Sub

Private Sub editor_TextChanged(sender As Object, e As System.EventArgs)

    Try

        Dim editor As Telerik.WinControls.UI.RadMultiColumnComboBoxElement = DirectCast(Me.RadGridView1.ActiveEditor, Telerik.WinControls.UI.RadMultiColumnComboBoxElement)

        With editor

            If .ValueMember = "pkPostID" Then

                With .EditorControl

                    With .MasterTemplate.FilterDescriptors

                        .Remove("filterUPN")

                        .Add("filterUPN", Telerik.WinControls.Data.FilterOperator.IsEqualTo, editor.Value)

                    End With

                    .TableElement.Update(Telerik.WinControls.UI.GridUINotifyAction.FilteringChanged)

                End With

            ElseIf .ValueMember = "pkEmployeeID" Then

                With .EditorControl

                    With .MasterTemplate.FilterDescriptors

                        .Remove("filterEmpNum")

                        .Add("filterEmpNum", Telerik.WinControls.Data.FilterOperator.IsEqualTo, editor.Value)

                    End With

                    .TableElement.Update(Telerik.WinControls.UI.GridUINotifyAction.FilteringChanged)

                End With

            End If

        End With

    Catch ex As Exception

        Call MessageBox.Show(ex.Message)

    End Try

End Sub

If I select filters on other columns that are not MultiComboboxes they work without error.

I only have 2 columns in the grid that use multicomboboxes, the ValueMember and DisplayMember values are as follows:
Column 1 "POST"
ValueMember = "pkPostID" underlaying value datatype is Integer32
DisplayMember = "tPostUPN" underlaying value datatype is String

Column 2 "Employee"
ValueMember = "pkEmployeeID" underlaying value datatype is Integer32
DisplayMember = "lEmployeeNumber" underlaying value datatype is Integer32

the data is types and values are the same in the GridViewMultiComboBoxColumn elements.

Any help/ideas would be most welcome.

Thanks

Wayne Steel

GridView

answered on 17 Jan 2012

2 answers

119 views

Dock and Form Events

Hi,

I have a Main form that is set to MDI Parent This has a RadRibbon and a RadDock.the Dock is set to Auto Detect Mdi Children

I then Load a Form which contains a DataGridView in a Panel. I want to change the RadRibbon on the Main form to a Context Menu for the DataGridView when it is clicked and when the Form is Clicked the menu should return to the Form context.

I can switch to the DataGridView using its GotFocusEvent

To switch back the Form it is on does not fire the GotFocus, Activated or Click Events. is is possible to find out when the user has clicked on a form?

Thanks

Dock

answered on 17 Jan 2012

3 answers

79 views

Derive from RadRibbonBar

Hi,

I have created a class that derives from the RadRibbonBar so that i can create the elements on the bar in code and create an instance of the bar to apply them to my Form.

public class SappsRibbonBar : RadRibbonBar

{

public void CreateSappsRibbonBar(MenuType MenuType)

{

BuildFromDB(MenuType);

}

this builds the bar ok but there seems to be no theme attached to the bar. is there something i'm missing?

thanks

RibbonBar

answered on 17 Jan 2012

3 answers

92 views

TelerikEditor upgraded to .1219

Hi,
I have just upgraded to .1219 and would like to use the new nice features with the TelerikEditor.

this.richRibbonBar1 = new TelerikEditor.RichRibbonBar();

I get this error msg:

Error 3 The type or namespace name 'TelerikEditor' could not be found (are you missing a using directive or an assembly reference?)

What have I missed here?

Thank you,
Karl

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 17 Jan 2012

1 answer

181 views

GridView Row Add

i want to know how to add the rows added by the users to be added on the top
and also want to know how to add the rows that added by programatically to be added on the top.

i use the bound mode.i bind List<> to the "gridview.DataSource".

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answered on 16 Jan 2012

15 answers

554 views

Modfying existing themes for RadForm

How do I load the existing themes (e.g. Office2007Black) into the visual style builder to customize them? Loading the RadForm control simply loads the control default, and I cannot add from assembly because, I believe, the RadForm does not inherit from RadControl and thus is not a choice.

Themes and Visual Style Builder

answered on 16 Jan 2012

3 answers

345 views

Convert Winform to Radform and use of radribbonbar mainform

Hello everyone,

We are willing to update an application we started to develop since a few months with the Telerik components. I was wondering if there is a simple way to convert all the Winforms (about 100 of them) into Radforms easily?

I have also another question:
Once I convert all my winforms into radforms. I would like to display the forms inside the mainform with radribbonbar according on which button in the radribbonbar the user clicks. I found a solution: add a panel into the mainform. On each radform, below all the components there will be another panel which will be added or removed from the panel in the mainform according to what is needed. Do you think it's the best solution? Do you have any other solution?

I could not find much information about the radform in the documentation... that's why I am asking on the forum.

Thank you.
LB.

General Discussions

answered on 16 Jan 2012

21 answers

291 views

RadMaskedEditBox Value not working in Q2 2011 version

Hi. I use RadMaskedEditBox to display percent values. My code used the value property of the control to obtain the numeric value without the masked format and to assign values to the control form database fields. In Q2 2011 this is no longer possible because the value property returns the same values as the text property and when I assign values it no longer displays them correctly.

If my masked box displayed "4.00 %", the value property used to return 0.04. Now it returns "4.00 %". In the same way, if the database field had a value of 0.04 the masked box used to display "4.00 %" and now it displays "0.04 %".

Am I doing something wrong or is there a new way of doing this?

Thanks,

Javier Gonzalez de Aragon.

MaskedEditBox

answered on 16 Jan 2012

3 answers

118 views

CellDoubleClick for RadGridviewColumn

Hi guys :)

I Have a Radgridview and I want to hide other columns when I doubleclick a certain column
Im doing it through this code

Private Sub DataGridView1_CellDoubleClick(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCellEventArgs) Handles DataGridView1.CellDoubleClick
DataGridView1.Columns("Column1").IsVisible = False
DataGridView1.Columns("Column2").IsVisible = False
End Sub

But the problem is that I want to use this event when is certain column is doubleclicked and not for all columns. I want this code to run when I double clicked on column5 for example.

Im using vb.net and totally new to telerik controls

Any help would be appreciated in this regard.

Thanks :)

GridView

answered on 16 Jan 2012

3 answers

129 views

DataKeyName property not found

Dear Support ,
Just returning from extensive use of Telerik ASP.Net Grid :) I am unable to find DataKeyNames property in WinForms GridView . Kindly do let me know how I can find and use this in WinForms GridView.I am using Telerik controls version Q3 2010

Regards

GridView

answered on 13 Jan 2012