WPF Add listview item in listview created dynamically

Question

This is my first question here :)

I create a listview columns form a textfile in Window_Loaded() After this I want to add items to this listview...

foreach (KeyValuePair<string, string> key in App.sysIni.monitorProperties)
            {

                GridViewColumn column = new GridViewColumn();
                column.Header = key.Value;
                column.Width = 70;
                GridViewControlMonitor.Columns.Add(column);
}

After this I create listview items:

string[] rowItems = new string[list.Count];

for (int i = 1; i < list.Count; i++)
    {
    rowItems[i] = list[i];
    }
 var item = new ListViewItem { Content = rowItems};
 itemsList.Add(item);

And add this items in listview:

   RequestMonitorListV.Items.Add(item);

And my listview is populated with "String[] Array" not values...

Is possible to create a listview item with content and some kind of binding for that content?

var item = new ListViewItem { Content = rowItems, !!soomeBindingOptinos!!};

Can someone help me with this issue?

Thank you in advance

Possible duplicate of C# listView, how do I add items to columns 2, 3 and 4 etc? — Sean
– Sean, Commented Jun 12, 2017 at 15:33
Bind an ObservableCollection<string> to the Items of your Items property in XAML, then add the items while reading the text file. you may need to invoke the UI thread using the dispatcher... — Chrisi
– Chrisi, Commented Jun 12, 2017 at 15:46

mm8 · Accepted Answer · 2017-06-12 16:45:07Z

1

You should bind the DisplayMemberBinding property of each GridViewColumn to a property of an object in the ListView's ItemsSource collection:

for (int i = 0; i<App.sysIni.monitorProperties.Count; ++i)
{
    KeyValuePair<string, string> key = App.sysIni.monitorProperties[i];
    GridViewColumn column = new GridViewColumn();
    column.Header = key.Value;
    column.Width = 70;
    column.DisplayMemberBinding = new Binding("[" + i + "]");
    GridViewControlMonitor.Columns.Add(column);
}

...and set the latter to an IEnumerable like for example a string[]:

string[] rowItems = new string[list.Count];
for (int i = 0; i<list.Count; i++)
{
    rowItems[i] = list[i];
}
RequestMonitorListV.ItemsSource = rowItems;

answered Jun 12, 2017 at 16:45

mm8

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dornadigital · Accepted Answer · 2017-06-12 16:24:20Z

I'm going to be focusing on the second section of your code, as that seems to be the portion that is actually causing trouble. Unfortunately there are a few details missing, so I'll be making some assumptions on intent, type, etc.

Here is the .xaml I'll be working against:

<Window x:Class="WpfApp1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:WpfApp1"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" Width="525">
<Grid>
    <ListView x:Name="myListView" HorizontalAlignment="Left" Height="301" Margin="10,10,0,0" VerticalAlignment="Top" Width="498">
        <ListView.View>
            <GridView>
                <GridViewColumn/>
            </GridView>
        </ListView.View>
    </ListView>

</Grid>
</Window>

And here is my interpretation of that chunk of C#:

using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;

namespace WpfApp1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            var myListViewVar = this.FindName("myListView") as ListView;

            string[] rowItems = new string[10];

            for (int i = 0; i < 10; i++)
            {
                rowItems[i] = i.ToString();
            }
            var item = new ListViewItem { Content = rowItems };//You are adding your string array to a singular element. It does not want it. It wants a nice string.
            var itemsList = new List<ListViewItem>();//You then wrap this singular item in a list. I'm inferring the type here, since the rest of your code does not reference it.
            itemsList.Add(item);

            myListViewVar.Items.Add(item);//You then add the ARRAY to the list of items. Again, this is not desired. See https://msdn.microsoft.com/en-us/library/system.windows.forms.listview.items(v=vs.110).aspx for usage examples.
        }
    }
}

As explained above, WPF doesn't know how to stringify your array. Interpreting from what the rest of your code implies, what I think you want is:

using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;

namespace WpfApp1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            var myListViewVar = this.FindName("myListView") as ListView;

            string[] rowItems = new string[10];

            for (int i = 0; i < 10; i++)
            {
                rowItems[i] = i.ToString();
            }

            for (int i = 0; i < 10; i++)
            {
                var item = new ListViewItem { Content = rowItems[i] };//Each ListViewItem holds an individual string rather than an array
                myListViewVar.Items.Add(item);//Then add that ListViewItem.
            }
        }
    }
}

Obviously this has a redundancy in the form of the second loop, but I wanted to keep with your code where you store everything outside of the loop.

As for data binding, I'd recommend looking at WPF Binding to local variable I don't use WPF too often, but it looks like what you want.

Hope this helps. Let me know if I've missed the mark on what you're intending.

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