private void gvList_RowStyle(object sender, DevExpress.XtraGrid.Views.Grid.RowStyleEventArgs e)
        {
            e.Appearance.BackColor = Color.Red;
        }

------解决方案--------------------
试试这个!
C# code

private bool isSearch;
private void RowMergeView_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
        {
            if (isSearch==true)
            {
                //把你选择出行的backcolor.color=Color.FromAgb(xx,xx,xx);
            }
        }