Question

C#中如何将ListView中的所有Item添加到一个数组中？

例如我定义了一个变量：
ListViewItem[] its;
然后我有一个ListView，想将他里面所有的Item添加到这个变量中，请问如何实现？

Answer 1

int a = listView1.Items.Count;
ListViewItem[] LT = new ListViewItem[a];
for (int i = 0; i < a; i++)
{
LT[i] = listView1.Items[i];
}

Answer 2

一、在listview中分列显示distionary的泛型类的内容。
Dictionary dic = new Dictionary();
dic.Add(1, "刘备");
dic.Add(2, "张飞");
dic.Add(3, "赵去");
dic.Add(4, "关羽");
dic.Add(5, "姜维");
listView1.Clear();//清空先前内容
listView1.View = View.Details;//分列显示
listView1.Columns.Add("编号");
listView1.Columns.Add("姓名");
foreach (var ee in dic)
{
ListViewItem gg = new ListViewItem(new string[]{ee.Key.ToString(),ee.Value});//这是至关重要的一点。
listView1.Items.Add(gg);
}
二、在listview中分列显示二维数组
（一）我们先建立一个二维数组
listView1.View = View.Details;
listView1.Columns.Add("姓名");
listView1.Columns.Add("语文");
listView1.Columns.Add("数学");
listView1.Columns.Add("科学");
listView1.Columns.Add("英语");
string[,] chengji = new string[4, 5];
chengji[0, 0] = "小王";
chengji[0, 1] = "90";
chengji[0, 2] = "98";
chengji[0, 3] = "88";
chengji[0, 4] = "92";
chengji[1, 0] = "小李";
chengji[1, 1] = "92";
chengji[1, 2] = "94";
chengji[1, 3] = "98";
chengji[1, 4] = "93";
chengji[2, 0] = "小黄";
chengji[2, 1] = "91";
chengji[2, 2] = "92";
chengji[2, 3] = "93";
chengji[2, 4] = "94";
chengji[3, 0] = "小张";
chengji[3, 1] = "95";
chengji[3, 2] = "94";
chengji[3, 3] = "93";
chengji[3, 4] = "92";
（二）下面是几种分列显示二维数组的几种方法。
1、第一种分列显示方法：
listView1.Clear();
for (int i = 0; i < chengji.GetLength(0); i++)
{
ListViewItem bb = new ListViewItem(new string[] { chengji[i, 0], chengji[i, 1], chengji[i, 2], chengji[i, 3], chengji[i, 4] });
listView1.Items.Add(bb);
}
2、第二种分列显示方法：
上面的listview分列显示还可以用下面的方法。
listView1.Clear();
ListViewItem cj;
for (int i = 0; i < chengji.GetLength(0); i++)
{
cj = new ListViewItem(chengji[i,0]);
cj.SubItems.Add(chengji[i, 1]);
cj.SubItems.Add(chengji[i,2]);
cj.SubItems.Add(chengji[i, 3]);
cj.SubItems.Add(chengji[i, 4]);
listView1.Items.Add(cj);
3、第三种分列显示方法：
如果我们把二维数组转化为一维数组（即结合上面两种方法）还可以用下面的方法分列显示。
listView1.Clear();
ListViewItem cjj;
string[] sstr = new string[chengji.GetLength(1)];
for (int i = 0; i < chengji.GetLength(0); i++)
{
for (int j = 0; j < chengji.GetLength(1); j++)
{
sstr[j] = chengji[i, j];
}
cjj = new ListViewItem(sstr);
listView1.Items.Add(cjj);
}