Cast ListView Items to List<Object> in C#-CodePudding

I need to store the current listview items in a new object list just after I removed an element from listview.

This is my schema.cs

public class Show
{


public class Show
 {
    public Show() { }
    public int OrdNum { get; set; }
    public DateTime DTshow { get; set; }
    public string values { get; set; }
    public int practice_Number { get; set; }

 }

}

The problem is in Takenshows.cs

I don't know how to cast listview items to List< Show> after deleting an element from listview.

This is the button where I press and I remove an existing element from listview:

//Takenshows.cs... public List<Show> myShows;

public TakenShows()
{

InitializeComponent();
lvwColumnSorter = new ListViewColumnSorter();
this.listView1.ListViewItemSorter = lvwColumnSorter;
myShows = new List<Show>();

}

private void button1_Click(object sender, EventArgs e)
{

c = 0;

if (listView1.SelectedItems != null)
{

    for (int i = 0; i < listView1.Items.Count; i  )
    {

        if (listView1.Items[i].Selected)
        {

            DialogResult dr = MessageBox.Show("Are you sure you want to remove the element?", "WARNING", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);

            switch (dr)
            {

                case DialogResult.Yes:


                    listView1.Items[i].Remove();

                    i--;

                    for (int j = 0; j < listView1.Items.Count; j  )
                    {
                        c = c   1;
                        listView1.Items[j].SubItems[0].Text = c.ToString();
                    }

                    f = Int32.Parse(c.ToString());
                    // HERE's THE PROBLEM I need to cast my selected items from list view to object list ( List<Show>) and store those in myShows typed List<Show> Data
                    myShows = listView1.SelectedItems.Cast<ListViewItem>().Select(x =>
                         x.OrdNum, x.DTshow, x.values, x.practice_Number).ToList();

                    var frm2 = Application.OpenForms.OfType<Main>().First();

                    if (frm2 != null)
                    {
                        frm2.devCont();
                        frm2.devcontlist(f);
                    }

                    break;
                case DialogResult.No:
                    break;

        }
      }
    }
  }
}

would have to do something like this:

                          //BUT this code not works
            myShows = listView1.SelectedItems.Cast<ListViewItem>().Select(x =>
                                 x.OrdNum,x.DTshow,x.values,x.practice_Number).ToList();

I need when I'm removing an existing element from listview items, update the listview with the elements stayed after I removed one of them without including the element I removed.

The listview has to update after I remove an existing element from listview and it has to store in a < Show> list. How Can I do that? I've tried all possible ways but it's almost impossible.

CodePudding user response：

The ListViewItem Class does not have OrdNum, DTshow, etc. properties of your data model. You could add your model to the Tag property of the item when adding a new ListView item like this

ListViewItem item = new ListViewItem();
item.Tag = show;
item.Text = show.TheText;
//TODO: add subitems
listView1.Items.Add(item);

Then you can retrieve the data like this:

myShows = listView1.SelectedItems.Cast<ListViewItem>()
    .Select(lvi => (Show)lvi.Tag)
    .ToList();