Hi there,


I have written a component that resides within a column of a RadGridView. Based on the provided source code, I need the cell events like CellBeginEdit, CellEndEdit, and CellValueChanged in the RadGridView to be handled intelligently and reliably for columns of the AdvancedRadMultiColumnComboPlus type.

In other words, how can I get events like CellBeginEdit, CellEndEdit, and CellValueChanged to fire for columns of the AdvancedRadMultiColumnComboPlus type?

Please guide me.

Thank you.

I'm experiencing a bizarre issue with RadGridView.

I had a grid on a form that displays the results of a List collection. Pretty simple, but there was one column that refused to display the data. The column itself appeared but the data didn't display. I moved everything to another form and it worked fine.

Now I added another column to the grid and now that won't display data. The data is in the list collection, the FieldName property is correct  (I even copied it from the POCO to make sure.). Then  I added another column to the grid and it won't display at all at runtime even though it shows in the designer. Here is the code from the designer:

Any ideas on this one. I've never had a grid act like this before. Unfortunately I can't send you demo code s if I copy it to another form it will work.

Carl

Hello!
I had a chance to notice some strange behavior with setting CurrentColumn.

For instance I would like to change focused column, in case someone tries to focus on the wrong column. 

Let's review 2 cases:
Case #1 (without an issue):

1) User clicks on any cell (different from the current, for instance user cicked on column 2).
2) Grid tries to set Cell from column 2 as current.
3) RadGridView.CurrentCellChanged event is being triggered.
4) Method subscribed on RadGridView.CurrentCellChanged event sets CurrentColumn (for instance it sets 3 if Current one is not 3).
5) Grid sets Cell from third column as current.
6) Nothing is looped.

Case #2 (with issue):
1) Some Method from code sets CurrentColumn as 2 (different from the current one)
2) Grid tries to set Cell from column 2 as current
3) RadGridView.CurrentCellChanged event is being triggered.
4) Method subscribed on RadGridView.CurrentCellChanged event sets CurrentColumn (for instance it sets 3 if Current one is not 3).
5) Grid sets Cell from third column as current.
6) Loop has formed
6.1) Every RadGridView.CurrentCellChanged call it changes the input params:
call 1:
e.CurrentCell = (cell from column 2)
e.NewCell = (cell from column 3)
call 2:
e.CurrentCell = (cell from column 3)
e.NewCell = (cell from column 2)
call 3:
e.CurrentCell = (cell from column 2)
e.NewCell = (cell from column 3)
...

Code:

public partial class Form1 : Form
{
    private BindingSource bindingSource;
    public Form1()
    {
        InitializeComponent();
        InitializeGrid();

        radGridView1.CurrentCellChanged += RadGridView1_CurrentCellChanged;
    }

    private void RadGridView1_CurrentCellChanged(object sender, CurrentCellChangedEventArgs e)
    {
        if (radGridView1.CurrentColumn != radGridView1.Columns[2])
            radGridView1.CurrentColumn = radGridView1.Columns[2];
    }

    private void InitializeGrid()
    {
        bindingSource = new BindingSource();

        DataTable table = new DataTable();
        table.Columns.Add("Id", typeof(int));
        table.Columns.Add("Name", typeof(string));
        table.Columns.Add("Age", typeof(int));

        table.Rows.Add(1, "Alice", 30);
        table.Rows.Add(2, "Bob", 25);
        bindingSource.DataSource = table;
        radGridView1.DataSource = bindingSource;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        radGridView1.CurrentColumn = radGridView1.Columns[1];
    }
}

Hello,
I want to use the following commands:
F9 and Shift+F9.
F9: OK.
Shift+F9: no response?
Do you have a solution?

Here is my code.

METHOD PRIVATE VOID GridFamille_KeyDown( INPUT sender AS System.Object, INPUT e AS System.Windows.Forms.KeyEventArgs ):

IF e:Shift THEN DO:
            CASE e:KEYCODE :
                WHEN System.Windows.Forms.Keys:F9 THEN DO:
                             MESSAGE 'SHITF + F9' e:KEYCODE:ToString()    VIEW-AS ALERT-BOX.
                END.                   
            END CASE.
        END. 
        ELSE DO: 
            CASE e:KEYCODE:   

                WHEN System.Windows.Forms.Keys:F9 THEN DO:

                      MESSAGE 'F9' e:KEYCODE:ToString()    VIEW-AS ALERT-BOX.

Hello,

I want to add drawstring (watermark) to datagridview for some help information (for example: "double click to add new item" etc)

Can you help me?

Hi,

in datagridview I have set AllowRowReorder to True and works well.

But I want to copy row (not move) when I hold Ctrl key, it is possible?

Hi

I have a RadGridView with a  object-relational 3-tier-hierarchy where the datasource is a DataSet.

In a situation where my application updates an item of the first sublayer of the dataset:

each.ItemArray = vorgang.ItemArray;

the whole application gets into a deadlock.

Here is the call stack:

 	Anwendung.dll!Xxx.Yyy.Anwendung.View.GermanRadGridLocalizationProvider.GetLocalizedString(string id) Line 843	C#
>	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GroupPanelElement.UpdateView()	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GroupPanelElement.ProcessEvent(Telerik.WinControls.UI.GridViewEvent eventData)	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(Telerik.WinControls.UI.GridViewEvent gridEvent, Telerik.WinControls.UI.PriorityWeakReferenceList list, Telerik.WinControls.UI.GridEventProcessMode processMode)	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(Telerik.WinControls.UI.GridViewEvent gridEvent)	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(Telerik.WinControls.UI.GridViewEvent gridEvent)	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(Telerik.WinControls.UI.GridViewEvent gridEvent)	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(Telerik.WinControls.UI.GridViewTemplate template, Telerik.WinControls.UI.GridViewEvent eventData, bool postUI)	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewObjectRelationalDataProvider.DispatchDataViewChangedEvent(Telerik.WinControls.UI.DataViewChangedEventArgs args)	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewObjectRelationalDataProvider.Refresh()	Unknown
 	Telerik.WinControls.GridView.dll!Telerik.WinControls.UI.GridViewObjectRelationalDataProvider.bindableChildren_ListChanged(object sender, System.ComponentModel.ListChangedEventArgs e)	Unknown
 	System.Data.dll!System.Data.DataView.OnListChanged(System.ComponentModel.ListChangedEventArgs e)	Unknown
 	System.Data.dll!System.Data.DataView.IndexListChanged(object sender, System.ComponentModel.ListChangedEventArgs e)	Unknown
 	System.Data.dll!System.Data.DataView.IndexListChangedInternal(System.ComponentModel.ListChangedEventArgs e)	Unknown
 	System.Data.dll!System.Data.DataViewListener.IndexListChanged(System.ComponentModel.ListChangedEventArgs e)	Unknown
 	System.Data.dll!System.Data.Index.OnListChanged.AnonymousMethod__88_0(System.Data.DataViewListener listener, System.ComponentModel.ListChangedEventArgs args, bool arg2, bool arg3)	Unknown
 	System.Data.dll!System.Data.Listeners<System.__Canon>.Notify<System.__Canon, bool, bool>(System.__Canon arg1, bool arg2, bool arg3, System.Data.Listeners<System.__Canon>.Action<System.__Canon, System.__Canon, bool, bool> action)	Unknown
 	System.Data.dll!System.Data.Index.OnListChanged(System.ComponentModel.ListChangedEventArgs e)	Unknown
 	System.Data.dll!System.Data.Index.RecordStateChanged(int oldRecord, System.Data.DataViewRowState oldOldState, System.Data.DataViewRowState oldNewState, int newRecord, System.Data.DataViewRowState newOldState, System.Data.DataViewRowState newNewState)	Unknown
 	System.Data.dll!System.Data.DataTable.RecordStateChanged(int record1, System.Data.DataViewRowState oldState1, System.Data.DataViewRowState newState1, int record2, System.Data.DataViewRowState oldState2, System.Data.DataViewRowState newState2)	Unknown
 	System.Data.dll!System.Data.DataTable.SetNewRecordWorker(System.Data.DataRow row, int proposedRecord, System.Data.DataRowAction action, bool isInMerge, bool suppressEnsurePropertyChanged, int position, bool fireEvent, out System.Exception deferredException)	Unknown
 	System.Data.dll!System.Data.DataRow.EndEdit()	Unknown
 	System.Data.dll!System.Data.DataRow.ItemArray.set(object[] value)	Unknown

Hello,

we have an application using Telerik version 2021.3.1123.40. It is not the first time these errors were reportet, but I have no methode to reproduce it at the moment. The chain of Events for both errors is, that RadGridView.FilterChanged-Event is called, from there we call our method "UpdateProzessschritte" (UpdateProcessSteps), which does a BeginUpdate and EndUpdate of the grid. When EndUpdate is called, the 2 errors orccured under certain, unknown conditions.

1. ERROR|TBM_HAProzessPlugin.MainForm|1|(null)| In Modul TBM|DNA - Digitaler Netzanschluss ist ein Fehler aufgetreten. System.InvalidOperationException: Die Auflistung wurde geändert. Der Enumerationsvorgang kann möglicherweise nicht ausgeführt werden.
      bei System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
      bei System.Collections.Generic.List`1.Enumerator.MoveNextRare()
      bei System.Collections.Generic.List`1.Enumerator.MoveNext()
      bei Telerik.WinControls.UI.DataGroup.<GetEnumerator>d__7.MoveNext()
      bei Telerik.WinControls.UI.GridViewGroupRowInfo.get_ChildRows()
      bei Telerik.WinControls.UI.GridViewRowInfo.HasChildRows()
      bei Telerik.WinControls.UI.GridTraverser.CanStepInHierarchy()
      bei Telerik.WinControls.UI.GridTraverser.StepInHierarchy()
      bei Telerik.WinControls.UI.GridTraverser.MoveNextCore()
      bei Telerik.WinControls.UI.GridTraverser.MoveNext()
      bei Telerik.WinControls.UI.GridTraverser.GoToRow(GridViewRowInfo row)
      bei Telerik.WinControls.UI.BaseGridNavigator.ProcessEventCore(GridViewEvent eventData)
      bei Telerik.WinControls.UI.BaseGridNavigator.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
      bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
      bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
      bei Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewTemplate template, GridViewEvent eventData, Boolean postUI)
      bei Telerik.WinControls.UI.GridViewTemplate.DispatchEvent(GridViewEvent gridEvent, Boolean postUI)
      bei Telerik.WinControls.UI.GridViewTemplate.DispatchDataViewChangedEvent(Object sender, DataViewChangedEventArgs args)
      bei Telerik.WinControls.UI.GridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.MasterGridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.GridViewTemplate.EndUpdate(Boolean notify, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.MasterGridViewTemplate.EndUpdate(Boolean notify, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.GridViewTemplate.EndUpdate()
      bei Telerik.WinControls.UI.RadGridView.EndUpdate()
      bei TBM_HAProzessPlugin.MainForm.UpdateProzessschritte(RadGridView radGridView, RadDiagram radDiagram, Dictionary`2 prozessDauerListe, List`1 schritte) in C:\Program Files (x86)\Jenkins\jobs\TBM_DNA_Digitaler_Netzanschluss_WP\workspace\TBM_HAProzessPlugin\src\Forms\MainForm.cs:Zeile 510.
      bei TBM_HAProzessPlugin.MainForm.rgvHAAkten_FilterChanged(Object sender, GridViewCollectionChangedEventArgs e) in C:\Program Files (x86)\Jenkins\jobs\TBM_DNA_Digitaler_Netzanschluss_WP\workspace\TBM_HAProzessPlugin\src\Forms\MainForm.cs:Zeile 442.
   
   [Translation]: Collection was modified; enumeration operation may not execute
   
   
   
2. ERROR|TBM_HAProzessPlugin.MainForm|1|(null)| In Modul TBM|DNA - Digitaler Netzanschluss ist ein Fehler aufgetreten. System.ArgumentException: Ein Element mit dem gleichen Schlüssel wurde bereits hinzugefügt.
      bei System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
      bei System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
      bei System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
      bei Telerik.WinControls.Data.GroupBuilder`1.Perform(IReadOnlyCollection`1 items, Int32 level, Group`1 parent)
      bei Telerik.WinControls.Data.GroupBuilder`1.get_Groups()
      bei Telerik.WinControls.Data.RadDataView`1.get_Groups()
      bei Telerik.WinControls.UI.GridViewInfo.Refresh()
      bei Telerik.WinControls.UI.GridViewInfo.get_ChildRows()
      bei Telerik.WinControls.UI.GridViewTemplate.get_ChildRows()
      bei Telerik.WinControls.UI.ViewInfoTraverser.SetCollectionForStage(Boolean initializeCollection)
      bei Telerik.WinControls.UI.ViewInfoTraverser.ChangeCollectionForward()
      bei Telerik.WinControls.UI.ViewInfoTraverser.MoveNextCore()
      bei Telerik.WinControls.UI.ViewInfoTraverser.MoveNext()
      bei Telerik.WinControls.UI.GridTraverser.MoveNextCore()
      bei Telerik.WinControls.UI.GridTraverser.MoveNext()
      bei Telerik.WinControls.UI.GridTraverser.GoToRow(GridViewRowInfo row)
      bei Telerik.WinControls.UI.BaseGridNavigator.ProcessEventCore(GridViewEvent eventData)
      bei Telerik.WinControls.UI.BaseGridNavigator.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
      bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
      bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
      bei Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
      bei Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewTemplate template, GridViewEvent eventData, Boolean postUI)
      bei Telerik.WinControls.UI.GridViewTemplate.DispatchEvent(GridViewEvent gridEvent, Boolean postUI)
      bei Telerik.WinControls.UI.GridViewTemplate.DispatchDataViewChangedEvent(Object sender, DataViewChangedEventArgs args)
      bei Telerik.WinControls.UI.GridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.MasterGridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.GridViewTemplate.EndUpdate(Boolean notify, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.MasterGridViewTemplate.EndUpdate(Boolean notify, DataViewChangedEventArgs e)
      bei Telerik.WinControls.UI.GridViewTemplate.EndUpdate()
      bei Telerik.WinControls.UI.RadGridView.EndUpdate()
      bei TBM_HAProzessPlugin.MainForm.UpdateProzessschritte(RadGridView radGridView, RadDiagram radDiagram, Dictionary`2 prozessDauerListe, List`1 schritte) in C:\Program Files (x86)\Jenkins\jobs\TBM_DNA_Digitaler_Netzanschluss_WP\workspace\TBM_HAProzessPlugin\src\Forms\MainForm.cs:Zeile 510.
      bei TBM_HAProzessPlugin.MainForm.rgvHAAkten_FilterChanged(Object sender, GridViewCollectionChangedEventArgs e) in C:\Program Files (x86)\Jenkins\jobs\TBM_DNA_Digitaler_Netzanschluss_WP\workspace\TBM_HAProzessPlugin\src\Forms\MainForm.cs:Zeile 442.
   
   [Translation]: Item with Same Key has already been added

Do you have any ideas which causes could lead to this exceptions and how to fix it? Or is this a known problem which was already fixed in later versions?

i have noticed that if you click on the + icon of the pdfnavigator it doesn't work. outside the + icon it works.
is this only the case with me ?

andre

Hello.

I am developing a form that has a radgrid with hierarchy and in some instances, the parent row makes changes to the child rows and vice versa.
In my case, I have the functionalities below (Among others):

1. Both the parent and child rows have a "Check" column.
2. The relation between the 2 is done through an "Id" column which in my DataSource, is a Guid (The column in both templates is a textbox).
3. Every time a row is checked (Parent or child), the background changes color.
4. Every time I check a parent row, the corresponding child rows are also checked (Which then change color).
   Same happens if I uncheck the parent row which then unchecks the corresponding child rows and resets the background color.
   This behavior is managed in the CellValueChanged event of the RadGridView.
   Checking and unchecking the child rows according to the parent, is being done directly in the DataSource which in my case is a DataTable. But the same behavior happens if I edit the grid rows directly.
5. In the parent template, the Check column has the property EnableHeaderCheckBox set to true.
6. The color rule is managed by a ExpressionFormattingObject added to the ConditionalFormattingObjectList property of the Check column. I also tried to set up the color rules in the Formating events but the problem I will explain below persists. Still, the color is not the only problem.
   

My problem here is that everything works correctly if I check and uncheck the parent rows individually. Whether they expanded or not. Depending on the check action in the parent row, the child rows update visually both in their "Check" state and in the color rule.



However, if I check/uncheck all the parent columns from the header check box, the child rows do not update visually unless I close the parent row and expand it again or if I click on all rows/scroll down or up to force them to update.
Like in this print for example. The first parent row was expanded when I checked the header check box. It was suppose to check the child rows and update the color. They are checked internally in the datasource.



There are also some issues with the header check in the child rows. In this case, I do not have the EnableHeaderCheckBox = true in the GridViewTemplate but the problem is similar. Checking all the child rows of a certain parent row through the header check, updates the value on the "Chk" column but does not update it visually with the color.

There is also a problem where in some instances if I check all the parent rows through the header check box, their color does not update.
This happens regardless of the parent rows being expanded or not.



I have to click on each one or scroll or expand them to force the visual update.
The problem seems to be related to the actual visual update. I tried multiple things to for the update but none helped. Also tried forcing the rows to expand if they were collapsed not none helped.

This is all I tried.


On all the examples, I checked the data in the datasource and everything is updated correctly. It is just the visuals that are not updating automatically.

To help understand the problem, I attached a little example with a solution similar to what I have, where this issue can be replicated.
I am using Telerik Winforms V2024.4.1113.462.

Thank you in advance for any answer.
João Carvalho