Refreshing Row/Column styles

[Sue Harris]

Hi,

Is it possible to force a refresh (requery) of a row/column styles for a virtual grid without calling ResetVolitileData?

For example, I'm updating my internal data for a column's style, I call InvalidateRange on a Column Range for that column, but only individual cell QueryCellInfo calls are made, not for the column. (I want a QueryCellInfo event with e.ColIndex = mycolumn and e.RowIndex = -1).

Thanks,
Sue

[Administrator]

As a matter of fact, you can provide the column styles dynamically in QueryCellInfo by checking for e.RowIndex == -1.

//set column style 2
if(e.ColIndex == 2 && e.RowIndex == -1)
{
	e.Style.BackColor = Color.LightGoldenrodYellow;
}

Is it not working for you?

[Sue Harris]

Thats right,
I'm providing all my styles dynamically via the QueryCellInfo. I initially set a style to something (for example LightGoldenrodYellow color) and then when the user does something else (clicks a button for example) I want to change that style, but I can't get the QueryCellInfo to refire with the -1 row index.

[Administrator]

Calling grid,Refresh() seemed to work for me in these code snippets.

Color c = Color.LightGoldenrodYellow;

private void button1_Click(object sender, System.EventArgs e)
{
	c = Color.LightBlue;
	this.gridControl1.Refresh();
}

private void gridControl1_QueryCellInfo(object sender, GridQueryCellInfoEventArgs e)
{
	if(e.RowIndex == -1  && e.ColIndex == 1)
		e.Style.BackColor = c;
}

[Sue Harris]

Clay,

That is exactly what I want to happen but its not happening for me. I've attached a simple sample, which started as your virtual grid sample. I added a checkbox and in the CheckChanged event I call grid.Refresh. But I'm not getting a QueryCellInfo call with a -1 row count.

Please tell whats going wrong.

Thanks
Sue

[Administrator]

Sue,

Your code works for me. Now I am running 1.0 FrameWork so I had to change the proj and sln files a little to get things to run. I am also using teh 1.6.0.1 beta code.

But I see the text color change from green to pink and back again as I click the button.

What version are you using? If you want to try the 1.6.0.1 beta, you can submit a Direct Trac support incident and I can send you a download link.

Clay

[Sue Harris]

Thanks Clay,

The 1.6 beta works perfectly.