Getting "No room is available to display rows" when setting gridView.FirstDisplayedScrollingRowIndex

Question

gridView.FirstDisplayedScrollingRowIndex = gridView.SelectedRows[0].Index;

blowing up with:

No room is available to display rows

DataGridView is customized control in the unbound mode. datagridview.FirstDisplayedScrollingRowIndex is not set in a specific datagridview based event.

Rows are added to the datagridview via gatagridview.Rows.Add method on DataSet.EndMerge then cells are styled and formatted row by row. Last selected row is cleared and restored and scroll bar position restored to the first visible row.

Trying find out what this exception actually means.

if (gridView.Rows.Count > 0)
{
    gridView.ClearSelection();

    T value = GetItemByRow(gridView.Rows[0]);

    bool isVisible = filter.ShouldShow(value);
    gridView.Rows[0].Selected = true;

    if (!isVisible)
    {
        gridView.Rows[0].Visible = true;
        gridView.FirstDisplayedScrollingRowIndex = gridView.SelectedRows[0].Index; 
        gridView.Rows[0].Visible = false;
    }
    else
    {
        gridView.FirstDisplayedScrollingRowIndex = gridView.SelectedRows[0].Index;
    }
}

I still don't know where you are running this code. Constructor? Form's load event? Does `gridView.First....Index = 0;` work? It would accomplish the same thing. What you have posted does not reproduce the problem. — LarsTech, Oct 29 '15 at 17:06
Running this code on a separate thread on dataset.endmerge event. — Boris Kleynbok, Oct 29 '15 at 17:30
`gridView.First....Index = 0;` will not work all the time as some of the rows could be invisible that is why there is an if statement — Boris Kleynbok, Oct 29 '15 at 17:31
Code has been running for a while. This exception is thrown occasionally. No description of this exception online. — Boris Kleynbok, Oct 29 '15 at 17:49
It's very unclear how any of that code works if it's running in a separate thread. — LarsTech, Oct 29 '15 at 18:34
Just [this](https://social.msdn.microsoft.com/Forums/en-US/0a0dbec1-5dc5-47fe-bf07-ee82fb4e621d/no-room-is-available-to-display-rows) and [this](http://stackoverflow.com/q/1331000/719186). You would have to post code that reproduces the error. It sounds like your threading code is severely borked. — LarsTech, Oct 29 '15 at 19:45

score 1 · Answer 1 · answered Jun 04 '19 at 14:26

1

When the grid is automatically sized to be 0 height (or probably width) and you set

dataGridView.FirstDisplayedScrollingRowIndex = 0;

the exception will be thrown. Our grid has set Dock = Fill and in some cases was sized to be invisible.

Our fix was to set a MinimumSize to 100/50, and we never saw the exception again. Even if the grid is not within the window (and thus invisible) the exception will now not be thrown.

answered Jun 04 '19 at 14:26

Michael

386
2
9

Worked for me on this error too. It makes sense. – Davy C Feb 17 '22 at 14:11

score -1 · Accepted Answer · answered Mar 24 '17 at 19:59

-1

When are row is present in the grid but not visible setting it to be first row will make it throw this exception.

answered Mar 24 '17 at 19:59

Boris Kleynbok

317
2
5
15

Getting "No room is available to display rows" when setting gridView.FirstDisplayedScrollingRowIndex

2 Answers2