Ticket Q570580

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CheckBoxRowSelect - Selection is cleared when you click outside of a check box column

thomast

created 11 years ago

Hi,

I'm using CheckBoxRowSelect to select some rows on the xtragrid.
The option selection is set that way :

C#
this.gridViewAdresses.OptionsSelection.CheckBoxSelectorColumnWidth = 30;  
this.gridViewAdresses.OptionsSelection.EnableAppearanceFocusedCell = false;  
this.gridViewAdresses.OptionsSelection.EnableAppearanceFocusedRow = false;  
this.gridViewAdresses.OptionsSelection.EnableAppearanceHideSelection = false;  
this.gridViewAdresses.OptionsSelection.MultiSelect = true;  
this.gridViewAdresses.OptionsSelection.MultiSelectMode = DevExpress.XtraGrid.Views.Grid.GridMultiSelectMode.CheckBoxRowSelect;  
this.gridViewAdresses.OptionsSelection.ShowCheckBoxSelectorInColumnHeader = DevExpress.Utils.DefaultBoolean.True;

My problem is that if I click on another cell, it deselect all previous checked rows and select the row I just click on.
I want to keep the rows I checked previously, and only select a new one when the checkbox is clicked, and only on that cell, not when I click on another one.

What am I doing wrong ?

regards

Answers approved by DevExpress Support

Andrew Ser (DevExpress Support)

created 11 years ago (modified 11 years ago)

Hello,
Now it works as expected. We may reconsider this behavior and change it (or add an option for it) in the future. When it happens, we will inform you about it in the Provide a capability to keep selection when clicking outside the Check column thread. Please add it to your favorites.
As a workaround, handle the GridView.MouseDown and MouseUp events, and store selected row handles. After a mouse click is processed, restore the selection:

C#
private void KeepSelection(MouseEventArgs e, GridView view)  
{  
    DevExpress.XtraGrid.Views.Grid.ViewInfo.GridHitInfo hi = view.CalcHitInfo(e.Location);  
    if (hi.InRow)  
    {  
        if (hi.Column.FieldName != "DX$CheckboxSelectorColumn")  
        {  
            int[] selectedRows = view.GetSelectedRows();  
            bool isSelected = view.IsRowSelected(hi.RowHandle);  
            BeginInvoke(new Action(() =>  
            {  
                for (int i = 0; i < selectedRows.Length; i++)  
                    view.SelectRow(selectedRows[i]);  
                if (!isSelected) view.UnselectRow(hi.RowHandle);  
            }));  
        }  
    }  
}

I have attached a project illustrating this approach. Please test it and let us know your result.

dxExampleGrid.zip

Show previous comments (17)

thomast 11 years ago

Hi,
thanks, it works fine.
But I have another problem now.
The focusedrow is no longer highlithed when I click on another cell, instead of a focusedrow of a gridview that does not contain the checkbox selector.
Is there a way to highlight the focusedrow even if the checkbox selector is not checked ?
Regards

DevExpress Support Team 11 years ago

Hello Thomast,
I suggest that you use the GridView.RowStyle event and the GridView.Appearance.FocusedRow settings. I have attached a simple sample to illustrate this approach in action. Please check the attachment. Is that what you are looking for? I hope to hear from you soon.

Q570580.zip

thomast 11 years ago

Hi,
As I would like to have the focusedrow appearance like the appearance of a checked row (or the focusedrow when there is no checkedbox column), do you have the color code of this ? (I am using the Office 2013 skin).
Hope I am clear
Regards

DevExpress Support Team 11 years ago

Hello,
In order not to mix several questions within one thread, I will extract your question to a new ticket. Let us continue our discussion there How to get FocusedRow's color.

Gard Mellemstrand 11 years ago

Hi
I have used your code in dsExpampleGrid.zip.
It works well for uneditable columns, but editable columns are no longer possible to edit.
How can the sample be changed so editable columns can be edited ?
Regards

DevExpress Support Team 11 years ago

Hi Rolf,
I suggest that you open an editor on the MouseUp event. Set the GridView.OptionsBehavior.EditorShowMode property to the EditorShowMode.MouseUp value to do it. Here is the modified sample that illustrates this approach in action.

DX_Sample.zip

Silvestro Ricciardi 11 years ago

Hi,
I used this example for select items only by checkbox columns.
I suppose there is an error: when user clicks on any other columns with SHIFT button pressed, checkbox will be selected.
Any workaorund?
Thanks in advance.
Sly

DevExpress Support Team 11 years ago

Hi,

Starting from version 14.1.3, we have introduced a new GridView.OptionsSelection.ResetSelectionClickOutsideCheckboxSelector property. This option is set to false by default. It means that by default if an end-user clicks anywhere in the grid outside the check column, selection is not reset. So, simply upgrade your application to the latest version 14.1.7. You will obtain the required behavior without any code shown here. I would like to note that this option will produce the desired behavior when you press SHIFT.

Let me know of your results.

Silvestro Ricciardi 11 years ago

Hi,
Thanks for your suggest, it works well!!!
Now, in my grid I suppose there is another mistake: when user expands detail row from "Detail Expand Button", all details will be selected automatically.
Am I wrong?
Thanks in advance.
Sly

Andrew Ser (DevExpress Support) 11 years ago

Hello Silvestro,
I've tested this scenario within a simple project but cannot reproduce the issue. When I expand a detail view, its rows are not selected regardless of whether the master row is selected or not.
Do you use the helper class from the How to select all detail rows when selecting a master row (CheckBoxRowSelection mode) example?
If not, please try to modify my project (see the attachment) so that it replicates the problematic behavior and send it back to us.
I hope to hear from you soon.

Q570580.zip

Silvestro Ricciardi 11 years ago

Hi,
thanks for your attention.
Your example is quite good for my grid behaviour.
Infact, when you expand a master row, a first detail row will be selected automatically.
I don't wanna this. I would like no one detail row will be selected.
How can I do?
Thanks in advance.
Sly

Andrew Ser (DevExpress Support) 11 years ago

Hi,
The first row is always selected when you expand a detail view. However, you can handle the GridView.MasterRowExpanded event and clear selection via the GridView.ClearSelection method. You can find more information about this case in the The first row is selected in master-detail mode (CheckBoxRowSelect mode applied) thread.
I hope you find this information useful.

Silvestro Ricciardi 10 years ago

Hi,
my scenario is much more different because I'm using pagination.
When I change page, I have to keep previous selections.
Now, when I use clearselection method inside masterowexpanded event, also previous selection will be cleared.
Is there any workaround?
Thanks in advance.
Sly

Andrew Ser (DevExpress Support) 10 years ago

Hi,
Not to mix several question within one thread, I've extracted your last inquiry into a separate ticket - Grid - How to unselect the first row in a detail view, but preserve the previous selection if any. Let's continue our discussion there. Thank you for the cooperation.

MARK SANCHEZ 10 years ago

I had the same issue as thomast here. I was referred to this post from my own at https://www.devexpress.com/support/center/Question/Details/T193570
The following is a VB.NET example of Andrew Ser's code in dxExampleGrid.zip above, which worked for me His code is in C# and the BeginInvoke part is a bit tricky.
I am using v13.2.7 but in version 14.1, DevExpress introduced the GridOptionsSelection.ResetSelectionClickOutsideCheckboxSelector property to control this behavior.

Visual Basic
Private Sub grdView_MouseDown(sender As Object, e As MouseEventArgs) Handles grdView.MouseDown  
   Dim view As GridView = TryCast(sender, GridView)  
   keepSelection(e, view)  
End Sub  

Private Sub grdView_MouseUp(sender As Object, e As MouseEventArgs) Handles grdView.MouseUp  
   Dim view As GridView = TryCast(sender, GridView)  
   keepSelection(e, view)  
End Sub  

Private Sub keepSelection(e As MouseEventArgs, view As GridView)  
       Dim hi As GridHitInfo = view.CalcHitInfo(e.Location)  
       If hi.Column IsNot Nothing Then  
           If hi.Column.FieldName <> "DX$CheckboxSelectorColumn" Then  
               Dim selRows() As Integer = view.GetSelectedRows()  
               Dim isSelected As Boolean = view.IsRowSelected(hi.RowHandle)  
               BeginInvoke(New Action(Function()  
                                          For i As Integer = 0 To selRows.Length - 1  
                                              view.SelectRow(selRows(i))  
                                          Next  
                                          If Not isSelected Then  
                                              view.UnselectRow(hi.RowHandle)  
                                          End If  
                                      End Function))  
           End If  
       End If  
End Sub

DevExpress Support Team 10 years ago

Hello Mark,
Are the issues you encountered resolved now?

Sandeep Reddy 6 9 years ago

Hi,
I have one issue here still. When I Check any row checkbox the checkbox is Checked, but if I go other row and check the checkbox, previously selected row checkbox is unselected. I want to preserve the previously selected checkbox state( It should not be unchecked). Is there any direct property or option to get this feature. Please help me in this regard

DevExpress Support Team 9 years ago

Hi Sandeep,

I noticed that this ticket was created by another person, so I want to clarify some details to avoid any misunderstanding. Is the issue you are talking about related to the code above, or do you not use this approach in your application? Can you show us the code used to setup this column and describe how it is bound to the datasource?

Sandeep Reddy 6 9 years ago

My Issue is not related to code mentioned above. I am trying to bind simple datatable with two data columns. Once the datasource is set and binded to grid. I am trying to set below two properties
gridViewAdresses.OptionsSelection.MultiSelect = true;
this.gridViewAdresses.OptionsSelection.MultiSelectMode =DevExpress.XtraGrid.Views.Grid.GridMultiSelectMode.CheckBoxRowSelect;
Here I am able to see the checkbox as first column along with other two datacolumns of datasource. But my concern at any point of time I am able to check only one datarow checkbox. By selecting the control I can can select multi rows checkboxes. But I do not want to have that way. I should be able to persist the previous checked checkbox state when I select other row checkbox.

Nadezhda (DevExpress Support) 9 years ago

Hello,

To process your recent post more efficiently, I created a separate ticket on your behalf: How to prevent multi row selection when the CheckBoxRowSelect option is used. This ticket is currently in our processing queue. Our team will inform you as soon as we have any updates.

Created: February 12, 2014 4:41 PM

Modified: December 11, 2015 8:52 AM

Platform: WinForms

Product: XtraGrid Suite

Build: 13.2.7

IDE: Microsoft Visual Studio 2010

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CheckBoxRowSelect - Selection is cleared when you click outside of a check box column

Answers approved by DevExpress Support

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