在listView中平均分3个板块
eg:
int c = 3;
listView1.Columns.Add("考试科目",listView1.Width/c,HorizontalAlignment.Center);
listView1.Columns.Add("考试时间",listView1.Width/c,HorizontalAlignment.Center);
listView1.Columns.Add("考试地点",listView1.Width/c,HorizontalAlignment.Center);