我试过好几个位置？
其运行结果都不一样。
问题1: Comm.list.Add(studengt);
           // Comm.list.Clear();
       为什么放在这句话代码的后面，点提交按钮了后，
       数据没在 listView1显示？
问题2：规范的位置是放在那个位置？
 private void button1_Click(object sender, EventArgs e)
        {
             // Comm.list.Clear();
            studengt = new Studengt();
            studengt.Usename = textBox1.Text;
            studengt.Yuwen = Convert.ToInt32(textBox2.Text);
            studengt.Shuxue = Convert.ToInt32(textBox3.Text);
            int zongfen =Convert.ToInt32(textBox3.Text) +Convert.ToInt32(textBox2.Text);
            int pingjunfen =( Convert.ToInt32(textBox3.Text) + Convert.ToInt32(textBox2.Text))/2;        
            Comm.list.Add(studengt);
           // Comm.list.Clear();
            for (int i = 0; i < Comm.list.Count; i++)
            {
               
                ListViewItem list1 = new ListViewItem(Comm.list[i].Usename);
                list1.SubItems.Add(Comm.list[i].Yuwen.ToString());
                list1.SubItems.Add(Comm.list[i].Shuxue.ToString());
                list1.SubItems.Add(zongfen.ToString());
                list1.SubItems.Add(pingjunfen.ToString());
                listView1.Items.Add(list1);
            }
            // Comm.list.Clear();
            textBox1.Text = "";
            textBox2.Text = "";
            textBox3.Text = "";
           
        }

版主解释的很详细，新手还在摸索当中。。以后碰到不懂的在请教版主！！万分感谢！！