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c#linqlistview
yerpy
yerpy

Reputation: 1446

Linq - selection item from ListView

How could I select all information about selected item, not only first column but all ?

For the first column I just need : 

ListView.Items.AddRange(ListData
    .Where(i => string.IsNullOrEmpty(searchBox.Text) || i.ID.StartsWith(searchBox.Text))
    .Select(c => new ListViewItem(c.ID))
    .ToArray());

Lets say that next columns are : Name, LastName

I know that I have to use Linq segment which looks like : 

(...).Select(c => {  })

Thanks in advance!

Upvotes: 0

Views: 1044

Answers (3)

Gian Paolo
Gian Paolo

Reputation: 4249

You can use the ListViewItem ctor that accept an array of string (where elements after the first are the subitems)

Assuming your class has the properties LastName and Name

ListView.Items.AddRange(ListData.Where(i =>    
            string.IsNullOrEmpty(searchBox.Text) 
            || i.ID.StartsWith(searchBox.Text))
            .Select(c => new ListViewItem // this part
               (
                 new string[]{c.ID, c.Name, c.LastName}
               )).ToArray());

If the creation of a single ListViewItem get more complicated, consider using a funcion:

ListView.Items.AddRange(ListData.Where(i =>    
            string.IsNullOrEmpty(searchBox.Text) 
            || i.ID.StartsWith(searchBox.Text))
            .Select(c => CreateListViewItemFromElement(c)).ToArray());

private ListViewItem CreateListViewItemFromElement(MyClass element)
{
// handle the element to create a "complete" ListViewItem with subitems
    ListViewItem item = new ListViewItem(c.ID);
    ....
    return item;
}

(actually, I would use the latter in every case, it's much more readable to me)

Upvotes: 1

Ivan Stoev
Ivan Stoev

Reputation: 205759

Well, the ListViewItem class has 22 (!) constructor overloads, so you can use any of them that supports passing string[] items, for instance this one:

.Select(c => new ListViewItem(new string[] { c.ID, c.Name, c.LastName }))

Upvotes: 1

teo van kot
teo van kot

Reputation: 12491

Just init all properties that you need in .Select() method line this:

ListView.Items.AddRange(ListData.Where(i =>    
            string.IsNullOrEmpty(searchBox.Text) 
            || i.ID.StartsWith(searchBox.Text))
            .Select(c => new ListViewItem // this part
               {
                   Name = c.ID.ToString(),
                   Text = c.Name + " " + c.LastName
               }).ToArray());

Maby you want to fill different properties, so fill freee to change this part as you want.

Upvotes: 1

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