Hi,
I have implemented the 'Check All Header Cell' as shown in this KB article http://www.telerik.com/support/kb/winforms/gridview/add-check-uncheck-all-check-box-in-the-header-cell.aspx.

This works really well in most scenarios but I have run into a small bump in the road. The problem is that I have two grids that are linked in a cascading style. The purpose of this is to fill grid 2 with all of the contacts relating to the selected person or people in grid 1. Again this is all working perfectly for single or multiple selections using the normal check boxes in the rows.

I am hooking in to the ValueChanged event and then checking the cell type to determine if it is a single or check all operation. I set a processing flag to avoid multiple runs of the population code. The flag is reset in the DataBindingComplete event.


The problem I am getting is that the databinding is so fast that the flag is reset almost instantly. The 'Check All' code from the KB article  works by setting each checkbox to checked in a loop. This is firing the ValueChanged event and running the Grid 2 population code over and over again resulting in a lengthy delay (30 secs +) when the header cell is clicked.

I need a way to notify my app that the 'Check All' operation has finished (that is all of the check boxes have had their state changed and there are no other ValueChanged events to be raised). The following method from CheckBoxHeaderCell.cs is where I would expect see an event being raised from, but I cannot figure out a way to hook such an event from my app or make it bubble up via the grid.


I add the column to my grid using the following code, I have checked the events available to 'checkColumn' and there is nothing suitable that I can see.



Can you please let me know if there is a way to raise an event from this custom header cell that can be hooked into by my app.

Many Thanks

Chris

Hi,
Can you please advice how to remove the extra space as highlighted in RED box?
Thanks.

Hi,

I am having trouble with the first value displayed in a dropdownlist. The column is bound to a datasource that contains all possible values in the forms load event. Under the cell editor initialized event I change the drop down list editor element's datasource to only show relevant values based on another columns value. This is all working fine with correct values being populated in the list. However if I select the first value in the drop down list it does not display. All the other values work as expected.

 

Load event:

Dim ListDisplayColumn As GridViewComboBoxColumn = dgvReportingIndicators.Columns("ListSwitchDisplay")

            ListDisplayColumn.DataSource = Me.TrafficLightIndicatorsTableAdapter.GetData

            ListDisplayColumn.DisplayMember = "DisplayName"

            ListDisplayColumn.FieldName = "ListSwitch"

            ListDisplayColumn.ValueMember = "ID"

CellEditorInitialized event:

If e.Column.Name = "ListSwitchDisplay" Then

                Dim dropDownEditor = TryCast(dgvReportingIndicators.ActiveEditor, RadDropDownListEditor)

                Dim element = TryCast(dropDownEditor.EditorElement, RadDropDownListEditorElement)

                Select Case e.Row.Cells("IndicatorTypeDisplay").Value

                    Case "Count"

                        element.DataSource = Me.TrafficLightIndicatorsTableAdapter.GetNotApplicable

                    Case "Traffic Light"

                        element.DataSource = Me.TrafficLightIndicatorsTableAdapter.GetTL

                End Select

                element.ShowPopup()

            End If

hi i need to change the GridView row backcolor using index in the RadButton Click event

I have a custom VisualItem (class CustomVisualItem : IconListViewVisualItem) and I want a nice image of this item while dragging.
So I wrote this in my VisualItem, but this method never get called (no message in output).

Is it a bug or my fault?
Ps: There is pretty much no docu on these to methods (GetDragHintCore and GetAsBitmap [what about the parameters?]).

Hi,

I've posted about this before, but two days later the thread disappeared, wierd!
Anyway, i have more details now.
I have an app which uses a gridview with a combobox column. the combobox column uses suggestAppend
It seems the combobox column, by default, requires the user to hit enter twice before EndEdit is called.

The grid itself has a custom GridBehavior to override ProcessKey such that when enter is pressed, it calls EndEdit and SelectNextRow
This is so that on the combobox column, the user only has to hit enter once.

this worked on version 2010.2.10.914 of the telerik controls, i am now using the latest version and it no longer works. ProcessKey is never called while the suggestions list is showing.

Is there a way for me to get the KeyPress events from the suggestion box to bubble up to the gridview?

Thanks,
Matt

Hello almighty telerik team,
i  apologise for not speaking well english, no my mother language.
to my problem - i can no make ribbon height bigger. i tried seting in the designer but no luck.
please show sample or code to make this. i write from my coleague acount in india. regards from asia,
suresh rajeshkumar

Hi,

I want to change a GridViewCheckBoxColumn to display a red Cross Mark instead of the green Tick Mark.

Is this possible and if so how?

Kind Regards,
Brad

Hey Telerik!

We are currently evalutaing your windows forms control suite and have hit a road block.  One of our custom controls that we created relies on a base windows form which contains all the drag/drop logic, etc.  The other forms then inherit from this base form.  This works perfectly with regular windows forms.

When I tried to set up a simple scenario with a base form and have a second form inherit from the base, I am unable to add any controls in the designer and instead am greeted with this design error:

"   The designer could not be shown for this file because none of the classes within it can be designed. The designer inspected the following classes in the file: InheritBase --- The base class 'WindowsApplication1.RadFormBase' could not be loaded. Ensure the assembly has been referenced and that all projects have been built. "

I have uploaded my simple test here :  http://www.vbninja.com/baseformtest.zip

Thanks
Mark

Hi,

What is the best way to validate a raddropdownlist?  I'v looked at the _Validating Event but this appears to only fire when you select another control.

When I try the selectedvlue_changed this appears to fire when the control is being databound etc.

Any help or pointers would be great.

Thanks