GridViewBooleanColumn: strange behaviour when work with keyboard

[Emanuele Savarese]

WinForms RadControls Q3 2007
Visual Studio 2005
.NET 2.0

In other grid when I work with check box column I can set value of checkbox pressing space bar. I tried to set value with space bar but RadGridView have a strange behaviour.

1. on first load on first row press once space bar but grid doesn't check
2. after few seconds press another time space bar and grid check cell
3. go to second row with arrow keys
4. press space bar first time on second row and... check on first row disappear ?!? and on check on second row stay off
5. press space bar second time on second row and appears check on second row
6. go to third row and appers check also on the first row ?!?!?

I want a simple way to set checkbox in column similar Microsoft standard control ListView when set with CheckBoxes  = true.

Placed a listview and a radgridview this code can reproduce error and my favourite behaviour.

Thanks in advance,
Emanuele Savarese

	private void Form1_Load(object sender, EventArgs e)
	{
	DataTable dt = new DataTable();
	dt.Columns.Add("From", typeof(bool));
	dt.Columns.Add("To", typeof(bool));
	dt.Columns.Add("Description", typeof(string));
	dt.Rows.Add(false, false, "hi1");
	dt.Rows.Add(false, false, "hi2");
	dt.Rows.Add(false, false, "hi3");
	dt.Rows.Add(false, false, "hi4");
	dt.Rows.Add(false, false, "hi5");
	dt.Rows.Add(false, false, "hi5");
	dt.Rows.Add(false, false, "hi6");
	dt.Rows.Add(false, false, "hi7");
	dt.Rows.Add(false, false, "hi8");
	dt.Rows.Add(false, false, "hi9");
	dt.Rows.Add(false, false, "hi10");
	radGridView1.MasterGridViewTemplate.AutoGenerateColumns = false;
	radGridView1.Columns.Add(new GridViewBooleanColumn("From"));
	radGridView1.Columns[0].IsPinned = true;
	radGridView1.Columns.Add(new GridViewBooleanColumn("To"));
	radGridView1.Columns[1].IsPinned = true;
	radGridView1.Columns.Add(new GridViewTextBoxColumn("Description"));
	radGridView1.Columns[2].ReadOnly = true;
	radGridView1.Columns[2].Width = 600;
	radGridView1.SelectionMode = GridViewSelectionMode.FullRowSelect;
	radGridView1.DataSource = dt;
	listView1.View = View.Details;
	listView1.FullRowSelect = true;
	listView1.CheckBoxes = true;
	listView1.Columns.Add("To");
	listView1.Columns.Add("Description");
	listView1.Items.Add(new ListViewItem(new string[] { "hi", "hi1" }));
	listView1.Items.Add(new ListViewItem(new string[] { "hi", "hi2" }));
	listView1.Items.Add(new ListViewItem(new string[] { "hi", "hi3" }));
	}

[Georgi]

Hi Emanuele Savarese,

I have replied to your previous post. Here is the text:

Unfortunately, this appears to be a bug. It is not related to the checkbox editor, but rather to the current cell in the RadGridView. This has been logged in our bug tracking system with the highest priority and will be addressed as soon as possible.

We are sorry for the inconvenience. Your telerik points have been updated.

Regards,
Georgi
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Quinn]

Has this bug been fixed?

[Stefan]

Hi Quinn,

Yes, checking a check box of a cell with space is now working correctly. Please give it a try and let us know if you have any difficulties.
 
All the best,
Stefan
the Telerik team

[Loren]

There still seems to be an issue with the last checked row in the collection when using spacebar. I check a few rows using arrow keys and space bar, and the last one is still showing that it's false. I checked the CellValueChanged event and it is definitely firing, but when I query the checkbox column for that row, it's acting like there is no checkbox column present at all.

I haven't tested with other data sources; I'm binding to a custom collection of objects with no data-bound field for the checkbox column.

foreach (GridViewRowInfo row in HostGrid.Rows)
{
    bool rowChecked = (bool?)row.Cells["CheckBox"].Value ?? false;

    if (!rowChecked) continue;

    checkedRows.Add(row);
}

The above code is resulting in the continue statement being hit for the last checked row in the sequence, resulting in checkedRows-1 results.

[Dinko | Tech Support Engineer]

Hi Loren,

I will start with that the new value inside the cell will be committed when the user leaves the cell (close the editor). Clicking on a cell will trigger the edit mode, but the new typed value is still not confirmed. This is the behavior that you observe with the GridViewCheckBoxColumn. Navigating to a cell with the keyboard and pressing space will change the checkbox value of the editor and the new value will be committed when you leave the cell, focus different controls so that the RadGridView loses focus, etc. 

You could change this behavior by setting the EditMode property of the control to OnValueChange.

 this.radGridView1.Columns.Insert(0,new GridViewCheckBoxColumn() { EditMode = EditMode.OnValueChange } );

Give this a try and let me know if it works for you. If not, can you modify my test project to mimic your set-up and attached it again so that I can take a closer look and debug it.

[Loren]

Hi Dinko,

That worked! Thank you.