datagridview multiselect without keyboard !

[oliharvey]

howdy....

in a datagridview - the user can select multiple rows by holding the
Control key down as they click with the mouse.

I am looking for a way to achieve the same result without the use of
the keyboard (I have a touchscreen application).

any ideas? - I'm a bit stuck

thanks,
Oli.

 

[Bryan Phillips]

The easiest way might be to toggle rows as selected/unselected when they
click (touch) each row.

 

[ClayB]

You can try tracking selected rows yourself and toggle the selections
on and off in the CellClick event. You can use the RowPrePaint event
to set the backcolor of selected rows.

//in form.load
this.dataGridView1.DefaultCellStyle.SelectionBackColor =
Color.FromArgb(0, Color.Black); //hide normal color
this.dataGridView1.EditMode =
DataGridViewEditMode.EditProgrammatically;
this.dataGridView1.CurrentCell = null;

this.dataGridView1.CellClick += new
DataGridViewCellEventHandler(dataGridView1_CellClick);
this.dataGridView1.RowPrePaint += new
DataGridViewRowPrePaintEventHandler(dataGridView1_RowPrePaint);



private List<int> selectedRowIndexes = new List<int>();

void dataGridView1_RowPrePaint(object sender,
DataGridViewRowPrePaintEventArgs e)
{
if (this.selectedRowIndexes.IndexOf(e.RowIndex) > -1)

dataGridView1.Rows[e.RowIndex].DefaultCellStyle.BackColor =
Color.LightBlue;
else

dataGridView1.Rows[e.RowIndex].DefaultCellStyle.BackColor =
SystemColors.Window;
}

void dataGridView1_CellClick(object sender,
DataGridViewCellEventArgs e)
{
if (this.selectedRowIndexes.IndexOf(e.RowIndex) > -1)
this.selectedRowIndexes.Remove(e.RowIndex);
else
this.selectedRowIndexes.Add(e.RowIndex);
this.dataGridView1.CurrentCell = null;
}
==================
Clay Burch
Syncfusion, Inc.