I'm unable to convert a JSON file (opened with OpenFileDialog) to a ListView.

My JSON file looks something like this:

{
    "m_Version": 9,
    "DisplayName": "#STR_EXPANSION_MARKET_CATEGORY_AMMO",
    "Icon": "Deliver",
    "Color": "FBFCFEFF",
    "InitStockPercent": 75.0,
    "Items": [
        {
            "ClassName": "ammo_12gapellets",
            "MaxPriceThreshold": 10,
            "MinPriceThreshold": 5,
            "SellPricePercent": -1,
            "MaxStockThreshold": 500,
            "MinStockThreshold": 1,
            "QuantityPercent": -1,
            "SpawnAttachments": [],
            "Variants": []
        },
        {
            "ClassName": "ammo_12garubberslug",
            "MaxPriceThreshold": 8,
            "MinPriceThreshold": 4,
            "SellPricePercent": -1,
            "MaxStockThreshold": 500,
            "MinStockThreshold": 1,
            "QuantityPercent": -1,
            "SpawnAttachments": [],
            "Variants": []
        }
    ]
}

Opening the file and trying to add:

private void button1_Click(object sender, EventArgs e)
{
    OpenFileDialog ofd = new OpenFileDialog();
    ofd.Filter = "JSON Files (*.json)|*.json|All files (*.*)|*.*";
    ofd.Multiselect = false;
            
    if(ofd.ShowDialog() == DialogResult.OK)
    {
        textBox1.Text = ofd.FileName;

        var fileStream = ofd.OpenFile();

        using (StreamReader reader = new StreamReader(fileStream))
        {
            var content = reader.ReadToEnd();
            var result = JsonConvert.DeserializeObject<Item>(content);

            listView1.Items.Add(new ListViewItem(new string[] { result.ClassName}));
        }
    }
}

public partial class Items
{
    public Item[] Item { get; set; }
}

public partial class Item
{
    [JsonProperty("ClassName")]
    public string ClassName { get; set; }
}

When I load the file, it adds something to the first column, however it is just an empty string. How can I get all "Items" to my ListView?

CodePudding user response：

try this

var content = reader.ReadToEnd();
JArray items= (JArray) JObject.Parse(content)["Items"];
foreach (var item in items)
{
    var namesList= item.Properties().Select(i => i.Value.ToString()).ToArray();
    listView1.Items.Add(new ListViewItem(namesList));
}

but IMHO it is better to create DataTable from Json and use it a list view source

var content = reader.ReadToEnd();
DataTable items=  JObject.Parse(content)["Items"].ToObject<DataTable>();

CodePudding user response：

I think there is another class which name Item look like as below.

public class Items
{
    public int m_Version { get; set; }
    public string DisplayName { get; set; }
    public string Icon { get; set; }
    public string Color { get; set; }
    public double InitStockPercent { get; set; }
    public List<Item> Items { get; set; }
}

public class Item
{
    public string ClassName { get; set; }
    public int MaxPriceThreshold { get; set; }
    public int MinPriceThreshold { get; set; }
    public int SellPricePercent { get; set; }
    public int MaxStockThreshold { get; set; }
    public int MinStockThreshold { get; set; }
    public int QuantityPercent { get; set; }
}

I think the problem is on your JsonConvert.DeserializeObject might deserialize for Items object then you can call Items collection property to get the first element.

var result = JsonConvert.DeserializeObject<Items>(content);
listView1.Items.Add(new ListViewItem(new string[] { JsonConvert.SerializeObject(result.Items.FirstOrDefault()) }));