private void dataGridViewProjects_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e) { try { ProjectId = (int)dataGridViewProjects.SelectedRows[0].Cells["ProjectID"].Value; object query = _taskBLL.GetIdleTask(ProjectId, 2); dataGridViewEmptyTasks.DataSource = query; dataGridViewEmptyTasks.Columns[0].Visible = false; } catch (Exception) { } }