c#中listview中求最大值最小值问题

问题描述

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;usingSystem.Windows.Forms; namespaceMark{    publicpartialclassForm1:Form    {        publicForm1()        {            InitializeComponent();        }        intcount=0;        privatevoidbutton1_Click(objectsender,EventArgse)        {            if(txtScore.Text=="")            {                MessageBox.Show("请输入分数！");            }            else            {                lvScore.Items.Add(txtScore.Text.Trim());                txtScore.Text="";                count++;            }        }         privatevoidbtnClear_Click(objectsender,EventArgse)        {            lvScore.Items.Clear();        }         privatevoidbtnCaculate_Click(objectsender,EventArgse)        {            doublesum=0,max,min,average;            for(inti=0;i<count;i++)            {                sum+=Convert.ToDouble(lvScore.Items[i]);                max=Math.Max(Convert.ToDouble(lvScore.Items[0]),Convert.ToDouble(lvScore.Items[i]));                min=Math.Min(Convert.ToDouble(lvScore.Items[0]),Convert.ToDouble(lvScore.Items[i]));                average=(sum-max-min)/(count-2);                lblResult.Text="最大数:"+max.ToString()+"n"+"最小数:"+min.ToString()+"n"+"平均数:"+average.ToString();            }            }         privatevoidtxtScore_KeyPress(objectsender,KeyPressEventArgse)        {            TextBoxcurrentTextBox=senderasTextBox;            if(e.KeyChar<'0'||e.KeyChar>'9')    //不是数字            {                e.Handled=true;            }            if(e.KeyChar==8)            {                e.Handled=false;            }            if(e.KeyChar==46)            {                if(currentTextBox.Text.IndexOf(".")==-1)                {                    if(currentTextBox.SelectionStart>0)                    {                        e.Handled=false;                    }                }            }         }                   }                }

这是代码这是界面

解决方案

解决方案二：
我的最大值，最小值没有显示对，比如那张图
解决方案三：
换个思路，把输入的值保存到list集合里，再遍历添加到listview。最后去求list中的max与min，avg值。
解决方案四：
max=Math.Max(Convert.ToDouble(lvScore.Items[0]),Convert.ToDouble(lvScore.Items[i]));min=Math.Min(Convert.ToDouble(lvScore.Items[0]),Convert.ToDouble(lvScore.Items[i]));这个地方错了
解决方案五：
这个地方怎么错了
解决方案六：
因为你每次比较的最大数都没有使用，你应该用max和lvScore.Items[i]这个作比较。你这么写永远是取得第一个数和最后一个数的最大或者最小值