Questions on UI for WinForms Forum

2 answers

330 views

Exception thrown when adding item to context menu after clearing bound list

I have a GridView that is bound to a binding list

BindingList<DataElementMap> DataElementMaps { get; set; }

mappingsGridView.DataSource = DataElementMaps;

I am adding a menu item to the Context Menu using the following

private void mappingsGridView_ContextMenuOpening(object

sender, ContextMenuOpeningEventArgs e)

{

if

(!e.ContextMenu.Items.Contains(_ceateTransformationMenuItem))

                {

                    e.ContextMenu.Items.AddRange(_ceateTransformationMenuItem);

                }

}

This works fine until I clear the data bound list. (i.e. DataElementMaps.Clear(); )

After a clear is executed the above code throws the following exception
System.ArgumentException occurred
Message=Cannot remove the specified item because it was not found in the specified Collection.
Source=mscorlib
StackTrace:
at System.Collections.CollectionBase.System.Collections.IList.Remove(Object value)
at Telerik.WinControls.RadElementCollection.CheckElementAlreadyAdded(RadElement element)
at Telerik.WinControls.RadElementCollection.OnInsert(Int32 index, Object value)
at System.Collections.CollectionBase.System.Collections.IList.Insert(Int32 index, Object value)
at Telerik.WinControls.RadItemOwnerCollection.OnInsertComplete(Int32 index, Object value)
at System.Collections.CollectionBase.System.Collections.IList.Add(Object value)
at Telerik.WinControls.RadItemCollection.AddRange(RadItem[] value)

GridView

answered on 04 Dec 2014

5 answers

129 views

Reloading a GridView dynamically

I'm having an issue with the GridView. I'd like to be able to dynamically make appear the AddNewRow control. By default I set the AllowAddNewRow=false, but if the user clicks on The "Add New Row" menu item, I'd like for the NewRow control to appear on the grid, after I set the AllowAddNewRow=true. But I can not find a way to redraw or reload the entire grid for it to appear. Is this even possible?

The gridview is on a form, do I have to reload the whole form for this work?

I am using version 2014.2.715.40.

Thanks for the help

P.S. A little sample of the method called dynamically:

public void New()
{
radGridPilotage.MasterTemplate.BeginUpdate();
radGridPilotage.AllowEditRow = true;
radGridPilotage.MasterTemplate.AllowAddNewRow = true;
radGridPilotage.MasterTemplate.EndUpdate();
radGridPilotage.Update();
}

GridView

answered on 04 Dec 2014

4 answers

1.0K+ views

[Solved] Text Box Double Click Event

Hi,
I am using textbox and in its double click event i am doing something,
but when i click in side the box area double click event is not working,But when i click on border of textbox double click event is
working properly.
Is there any way to fire double click event when i double click on the text area i.e. in side the text box.

TextBox

answered on 04 Dec 2014

6 answers

165 views

Intercepting scroll thumb drag events

I am capturing scroll events (via gvLibrary.TableElement.VScrollBar.Scroll += this.gvLibrary_Scroll;) so that I can call a method on a lazy-loader class to update records in my buffer. It's designed so that the 100,000+ records won't have to load all at once, but instead we load just a few pages of data at a time. Each time the scroll is CLICKED, I am successfully able to trap the event and update my lazy-loaded queue. However, if I drag the scroll bar, the event does not appear to fire. Is there another event that I can use to handle when the scroll thumb is dragged?

Thank you,

VSmirk

GridView

answered on 04 Dec 2014

2 answers

125 views

Options RadMenuItem appearing by default

Hi all,
I've set the OptionsButton Visibility to Collapsed

ribbonBar.RibbonBarElement.OptionsButton.Visibility = ElementVisibility.Collapsed;

and indeed I don't see the small button appearing in the footer of the StartMenu but for some reason I see a default RadMenuItem appearing on the left column of the StartMenu with the text "Options <application name>".
I have also tried (with no luck)

ribbonBar.OptionsButton.Visibility = ElementVisibility.Collapsed;

Thank you

RibbonBar

answered on 04 Dec 2014

1 answer

210 views

How to show telerik ExamplesForm

Hi,
I hope I'll get a reply this time (this will be my third post with no answer)

I was trying to use ExampleForms, I copied the source code of "Grouping" form into my project, it was loaded just fine.
But how to initiate the form? there is no ShowDialog method, and the show does not really show the form, so what should I do?

Dim form1 As New Form1
'form1.StartPosition = FormStartPosition.CenterScreen
'form1.ShowDialog()
form1.Show()
This is the code I used, where Form1 is a form inheriting ExamplesForm (Grouping form found in QuickStart)

Please reply ASAP.
Thank you,
Saleem.

General Discussions

answered on 04 Dec 2014

6 answers

292 views

How to get command column name

    
                  private void myGrid_CommandCellClick(object sender, EventArgs e) 
        
                  { 
        
                     GridCommandCellElement gCommand = (sender as GridCommandCellElement); 
        
                     if( gCommand.ColumnIndex == 11 ) 
        
                         // code.. 

                  }

Simple question - I have two command buttons and wondered if it's possible to get the unique name from within the event?! can only find the column index number. gCommand.Name returns ""

Cheers
Ewart.

GridView

answered on 03 Dec 2014

1 answer

134 views

[Solved] Selected Value Changing

Hi,

Is there a way I could implement Selected Value Changing in MultiColumnCombobox?

I wanted to restrict the user to select some rows. The said rows are should only be visible but not selectable.

I tried implementing MultiColumnCombobox.EditorControl.SelectionChanging. Even though I cancelled the event via e.Cancel=true, the selected value still changes to the selected row.

MultiColumn ComboBox

answered on 03 Dec 2014

1 answer

76 views

[Solved] Ribbonbar does not fill client area of form

Hallo,

Using VB, WinForms, VS2013

I see that my ribbon does not fill the client form (a RadForm) horizontally (s. attachment). What do I miss?

Thanks a lot for helping me
Fabian

RibbonBar

answered on 02 Dec 2014

1 answer

154 views

Y-axis text alignment

Hi,

I have noticed that text not all titles on the Y-axis are aligned to the right.

How can I align the text to the right?

On this attach for example some titles are right aligned (Ford, Suzuki, Fiat), and the others no.

Any help would be appreciated.

Thanks

ChartView

answered on 02 Dec 2014