CODEWITHSUNDEEP
c#jsonwinformslistviewlistviewitem
Kankuro
Kankuro

Reputation: 305

How to get data from ListViewItem; WinForms, C#

I am adding an item from one form to a listview on a different form and want to save each item within the listview to a JSON file. I can't figure out how to do this and have looked several places but it doesn't seem like people are using the same method(s) I'm using, or maybe I'm doing it all wrong.

Here is the code I am using to add the item to the listview, how could I access each piece of data within each ListViewItem to be able to save it all to a JSON file?

ListView lv = (ListView)lf.Controls["mainListView"];
        ListViewItem lvi = new ListViewItem();
        lvi.Text = Data.Name;
        lvi.Tag = Data;
            switch (Data.Type)
            {
                case "Anime":
                    lvi.ImageIndex = 0;
                    break;
                case "Book":
                    lvi.ImageIndex = 1;
                    break;
                case "Comic":
                    lvi.ImageIndex = 2;
                    break;
                case "Game":
                    lvi.ImageIndex = 3;
                    break;
                case "Manga":
                    lvi.ImageIndex = 4;
                    break;
                case "Movie":
                    lvi.ImageIndex = 5;
                    break;
                case "Other":
                    lvi.ImageIndex = 6;
                    break;
                case "TV":
                    lvi.ImageIndex = 7;
                    break;
            }
        lv.Items.Add(lvi);

And here is the information to the Values class, which is named "Data" on this form.

public Values Data
    {
        get
        {
            Values v = new Values();
            v.Name = itemNameTxt.Text;
            v.Type = itemTypeCmb.Text;
            v.TypeName = typeNameTxt.Text;
            v.Status = statusCmb.Text;
            v.Completed = completedNUD.Value;
            v.URL = imageUrlTxt.Text;
            v.RateOne = rating1.Checked;
            v.RateTwo = rating2.Checked;
            v.RateThree = rating3.Checked;
            v.RateFour = rating4.Checked;
            v.RateFive = rating5.Checked;

            return v;
        }
        set
        {
            itemNameTxt.Text = value.Name;
            itemTypeCmb.Text = value.Type;
            typeNameTxt.Text = value.TypeName;
            statusCmb.Text = value.Status;
            completedNUD.Value = value.Completed;
            imageUrlTxt.Text = value.URL;
            rating1.Checked = value.RateOne;
            rating2.Checked = value.RateTwo;
            rating3.Checked = value.RateThree;
            rating4.Checked = value.RateFour;
            rating5.Checked = value.RateFive;
        }
    }

Upvotes: 0

Views: 1079

Answers (1)

Ivan Stoev
Ivan Stoev

Reputation: 205929

It seem that you are storing the Values class instance used to populate the ListViewItem inside the Tag property:

lvi.Tag = Data;

So you can extract it from there when needed. For instance:

ListView lv = ...;
var valueList = lv.Items.Cast<ListViewItem>()
    .Select(lvi => (Values)lvi.Tag)
    .ToList();

Upvotes: 1

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