//search by class
private void cboClass_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.cboClass.SelectedIndex == -1)
{
MessageBox.Show("Please select Class Name", "Warning");
return;
}
this.dgvScoreList.DataSource = objScoreListService.QueryScoreListByClassName(this.cboClass.Text.Trim());
new DataGridViewStyle().DgvStyle1(this.dgvScoreList);
QueryScore(this.cboClass.SelectedValue.ToString());
}