private void delTheLearnerToolStripMenuItem_Click(object sender, EventArgs e)
{
DataGridViewRow dgvR = dgv.CurrentRow;
if (dgvR == null)
{
return;
}
string name = dgvR.Cells["姓名"].Value.ToString();
Learning learner = new Learning(name);
learner.del();
ShowResult.show(lblResult, "已删除！", true);
timerClsResult.Start();
this.dgv.DataSource = Learning.getAllLearners();
DGVHelper.AutoSizeForDGV(dgv);
}