C# Linq在c中从ListViewItemCollections中选择项

如何在C中使用Linq从ListViewItemCollections中选择ListViewItem

我试过用这个，但没用

ListViewItemCollections lv = listview1.items;

var test = from xxx in lv where xxx.text = "data 1" select xxx;


test   <--- now has the listviewitem with "data 1" as string value..

要获取ListViewItem的枚举数，必须强制转换ListView的Items集合：

IEnumerable<ListViewItem> lv = listview1.items.Cast<ListViewItem>();

ListViewItemCollection只实现IEnumerable而不是IEnumerable，因此编译器无法推断xxx的类型，并且LINQ查询不起作用

您需要强制转换集合，以便像这样使用它

var test = from xxx in lv.Cast<ListViewItem>() where xxx.text="data 1" select xxx;

或

---

如果要将搜索限制为一列，可以使用

IEnumerable<ListViewItem> lv = listView.Items.Cast<ListViewItem>();

var rows =  from x in lv
            where x.SubItems[columnIndex].Text == searchTerm
            select x;

if (rows.Count() > 0)
{
    ListViewItem row = rows.FirstOrDefault();

    //TODO with your row
}

---

我认为您应该使用：listview1.items.OfType；为了避免可能的强制转换异常@Preet Sangha：我认为不需要它，因为添加到ListView的项始终能够强制转换到ListViewItem

ListViewItemCollections lv = listview1.items;

var test = from ListViewItem xxx in lv where xxx.text == "data 1" select xxx;

listview1.items.Cast<ListViewItem>().Where(i => i.text == "date 1");

IEnumerable<ListViewItem> lv = listView.Items.Cast<ListViewItem>();

var rows =  from x in lv
            where x.SubItems[columnIndex].Text == searchTerm
            select x;

if (rows.Count() > 0)
{
    ListViewItem row = rows.FirstOrDefault();

    //TODO with your row
}