public void button1_Click(object sender, EventArgs e)
{
//List<Student> list = new List<Student>();
if (textBox1.Text.Length == 0)
{
MessageBox.Show("请输入学生姓名");
return;
}
try
{
if (float.Parse(textBox2.Text) < 0 || float.Parse(textBox2.Text) > 100)
{
MessageBox.Show("请输入0~100的分数");
return;
}
else
{
Student s = new Student();
s.addInfo(textBox1.Text, textBox2.Text);
s.outputToListView(listView1);
list.Add(s);
}
string aver = list.average(listView1).ToString (); //求平均值
textBox4.Text = aver; //显示平均值
}
catch (FormatException ee)
{
MessageBox.Show("请输入0~100的分数!");
}
textBox1.Clear();
textBox2.Clear();
MessageBox.Show(list.Count().ToString());
}
private void button2_Click_1(object sender, EventArgs e)
{
listView1.Items.Clear();
list.Clear();
OpenFileDialog lwtxt = new OpenFileDialog();
lwtxt.Filter = "文本文件(*.txt)|*.txt";
if (lwtxt.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
using (StreamReader sr = new StreamReader(lwtxt.FileName))
{
string s = sr.ReadToEnd();
string[] lines = s.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
if (lines.Count() == 0)
{
MessageBox.Show("请选择保存学生信息的txt文件");
return;
}
foreach (var i in lines)
{
string[] data = i.Split(new char[] { '\t' }, StringSplitOptions.RemoveEmptyEntries);
try
{
if(float.Parse(data[1]) >= 0 && float.Parse(data[1]) <= 100 )
listView1.Items.Add(new ListViewItem(data));
}
catch (Exception e1)
{
MessageBox.Show("请选择保存学生信息的txt文件");
return;
}
}
}
int t = listView1.Items.Count;
float sum1 = 0;
int I = 0;
float Average = 0;
for (; I < t; I++)
{
sum1 += Convert.ToInt32(listView1.Items[I].SubItems[1].Text);
} Average = sum1 / I;
string show = string.Format("{0}", Average);
textBox4.Text = show;
for (n = 0; n < listView1.Items.Count; n++)
{
Student stu = new Student();
//sum += float.Parse(lv.Items[n].SubItems[1].Text);
stu.addInfo(listView1.Items[n].SubItems[0].Text, listView1.Items[n].SubItems[1].Text);
list.Add(stu);
}
}
}