Virtual Tree Grid Sample and Column Headers

[Julie Levy]

I''m trying to get a treecell to appear in the first column header so i can trap the click to expand all/collapse all (instead of the buttons).

I''ve altered GridQueryCellInfo in the following way, but the tree cell isn''t painting. Is this possible? Do i need to add another base style?

if (e.RowIndex == 0 && e.ColIndex == 1)
{
e.Style.CellValue = "Test";
e.Style.CellType = "TreeCell";
e.Style.Tag = 0;
e.Style.ImageIndex = 1;
}

Thanks,
Julie

[Administrator]

Try this.

At the bottom of Form.Load, add:

// this.gridControl1[0, 1].BaseStyle = "Standard";
this.gridControl1[0, 1].Themed = false;
this.gridControl1[0, 1].CellType = "TreeCell";
this.gridControl1[0, 1].ImageIndex = 0;
this.gridControl1[0, 1].Tag = 0;
this.gridControl1[0, 1].ImageList = this.imageList1;
this.gridControl1.CellClick += new GridCellClickEventHandler(gridControl1_CellClick);

Then use this handler:

void gridControl1_CellClick(object sender, GridCellClickEventArgs e)
{
    if (e.RowIndex == 0 && e.ColIndex == 1)
    {
        if(this.gridControl1[0, 1].ImageIndex == 0)
        {
            button4.PerformClick();
        }
        else
        {
            button5.PerformClick();
        }
    }
}

Then at the top of saveCellInfo, add

if (e.ColIndex == 1 && e.RowIndex == 0)
{
    return;
}

This will just store the cell 0,1 information in the grid and let it be maintained internally, and not rely on the external datasource for its value.

[Julie Levy]

Thanks for your help Clay, this works great.