新手，关于listView的问题
listview C# --------------------编程问答--------------------
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//定义商品名称
public string goods1 = "牙膏", goods2 = "方便面", goods3 = "香烟";
//定义商品价格
public int goods1P = 10, goods2P = 5, goods3P = 15;
//定义总价
public int totalP = 0;
private void Form1_Load(object sender, EventArgs e)
{
//清空lv1和lv2
listView1.Items.Clear();
listView2.Items.Clear();
//清空txt1
textBox1.Text = "";
}
//点击按键“看看有什么”
private void bt1_Click(object sender, EventArgs e)
{
/* 怎么把定义的goods1，goods2,goods3
和goods1P, goods2P, goods3P，
一一对应的放入listView1 */
}
//点击按键“购买”，实现将listView1中选中的商品，价格，数量放入listView2，并计算总价，将总价显示在txt1中
private void bt2_Click(object sender, EventArgs e)
{
/* 问题：1、如何将listView1中选中的商品，价格，放入listView2？ 注：已设置为一次只能选择一个
2、因可能不是购买一种商品，购买的数量如何定义比较好？
3、如何弹出一个新窗口，让消费者填入购买数量？ */
}
//点击按键“退货”，实现将listView2中选中的商品删除，并更新总价，将总价显示在txt1中
private void bt3_Click(object sender, EventArgs e)
{
/* 问题：4、如何弹出一个新窗口，让消费者填入退货数量？
5、如何读出listView中某一行某一列显示的string? */
}
}
}
--------------------编程问答--------------------
ListViewItem item = listView1.FocusedItem;
ListViewItem nitem = new ListViewItem();
nitem.Text = item.Text;
nitem.SubItems.Add(item.SubItems[0].Text);
......
listView2.Items.Add(nitem);
谢谢你的回复，说实话，我没有看明白，能加点注释吗？谢谢 --------------------编程问答-------------------- 复制listView选中的项：
foreach (var item in listView1.SelectedItems)
{
var lvi = new ListViewItem;
lvi.Text = item.Text;
lvi.SubItems.Add(item.SubItems[0].Text);
lvi.SubItems.Add(item.SubItems[1].Text);
...
listView2.Item.Add(lvi);
}
关于数量的设计，最简单的，用户点一次购买，就增加一个，如果多于一个，就归并到现有的条目中。
如何读出listView中某一行某一列显示的string?
listView.Items[m].Text m行第一列
listView.Items[m].SubItems[n] m行的n-2列 --------------------编程问答--------------------
--------------------编程问答-------------------- 大概这样子 无聊实现了下
ListViewItem item = listView1.FocusedItem;//初始化一个新行item，并指向lv1的当前焦点那行？
ListViewItem nitem = new ListViewItem();// 初始化一个新行nitem？
nitem.Text = item.Text;//新行nitem的txt设置为item的txt？
nitem.SubItems.Add(item.SubItems[0].Text);//这行不懂，添加的txt的坐标是什么？x，y x=行 y=列
......
listView2.Items.Add(nitem);
--------------------编程问答-------------------- 按键“购买”的选取功能已经实现，谢谢楼上两位
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//定义商品名称
public string goods1 = "牙膏", goods2 = "方便面", goods3 = "香烟";
//定义商品价格
public int goods1P = 10, goods2P = 5, goods3P = 15;
//定义总价
public int totalP = 0;
private void Form1_Load(object sender, EventArgs e)
{
//清空lv1和lv2
listView1.Items.Clear();
listView2.Items.Clear();
//清空txt1
textBox1.Text = "";
}
//点击按键“看看有什么”
private void bt1_Click(object sender, EventArgs e)
{
listView1.Items.Clear();
listView1.Items.Add(new Goods(goods1, goods1P, totalP));
listView1.Items.Add(new Goods(goods2, goods2P, totalP));
listView1.Items.Add(new Goods(goods3, goods3P, totalP));
}
//点击按键“购买”，实现将listView1中选中的商品，价格，数量放入listView2，并计算总价，将总价显示在txt1中
private void bt2_Click(object sender, EventArgs e)
{
ListView.SelectedListViewItemCollection lvic = listView1.SelectedItems;
IEnumerator ienum = lvic.GetEnumerator();
while (ienum.MoveNext())
{
Goods goods = ienum.Current as Goods;
if (goods == null)
{
//logger.error("");
continue;
}
List<ListViewItem> relatedItem = listView2.Items.Cast<ListViewItem>().Where(x => x.Text == goods.Text).ToList() as List<ListViewItem>;
if (relatedItem.Count == 0)
{
Goods newgood = goods.GetGoods(1);
if(newgood!=null)
listView2.Items.Add(newgood);
}
if (relatedItem.Count == 1)
{
if(goods.GetGoods(1)!=null)
(relatedItem[0] as Goods).Count++;
}
}
}
//点击按键“退货”，实现将listView2中选中的商品删除，并更新总价，将总价显示在txt1中
private void bt3_Click(object sender, EventArgs e)
{
ListView.SelectedListViewItemCollection lvic = listView2.SelectedItems;
if (lvic.Count != 1)
return;
Goods goods = lvic[0] as Goods;
if (goods != null)
{
int backcount = 1;//默认1，可以自己设置
if (backcount <= 0)
{
//退还数量不对
}
List<ListViewItem> relatedItem = listView1.Items.Cast<ListViewItem>().Where(x => x.Text == goods.Text).ToList() as List<ListViewItem>;
if (relatedItem.Count == 0)
{
//找不到，出错！
}
if (relatedItem.Count == 1)
{
Goods basegood = relatedItem[0] as Goods;
if (backcount > goods.Count)
{
//退还数量太大
}
if (goods.GetGoods(backcount) != null)
basegood.Count += backcount;
}
}
}
}
/// <summary>
/// 商品类
/// </summary>
public class Goods : ListViewItem
{
string m_name = "";
int m_price = 0;
int m_count = 0;
public Goods(string name,int price, int count)
{
m_name = name;
m_price = price;
m_count = count;
loadDefault();
}
public int Count
{
get { return m_count; }
set
{
m_count = value;
SubItems.Remove(SubItems[SubItems.Count - 1]);
SubItems.Add(m_count.ToString());
}
}
private void loadDefault()
{
Text = m_name;
SubItems.Add(m_price.ToString());
SubItems.Add(m_count.ToString());
}
/// <summary>
/// 取出货物
/// </summary>
/// <param name="backcount"></param>
/// <returns></returns>
public Goods GetGoods(int backcount)
{
Goods regood = null;
if (Count >= backcount)
{
regood = new Goods(m_name, m_price, backcount);
Count -= backcount;
}
else
{
//数量不够
}
return regood;
}
}
}
现在问题是：
1，点击完购买后，如何让listView1.FocusedItem释放焦点？
2，点击完购买后如何弹出一个新窗口，让消费者填入购买数量？
3，储存购买“每个商品的数量”的变量该如何设计？
4，caozhy说归并到现有的条目中，如何实现？
谢谢。 --------------------编程问答-------------------- 楼上问题1：listView1.SelectedItems.Clear();
补充：.NET技术 , C#
