How do I change the background color for every line in a ListView?

To achieve different background colors for each line in a ListView, you should define a DataTemplate for the ListView items and bind the background color property to a property in your data source. Here's how you can modify your code to achieve this:

XAML:

C#

public class ListItem
{
    public string Name { get; set; }
    public Brush Background { get; set; }
}

public void FillListView(ListView LVw, List liststX)
{
    LVw.Items.Clear();
    if (liststX.Count > 0) {
        foreach (string stName in liststX) {
            ListItem item = new ListItem() { Name = stName };

            if (stName.Contains("blue"))
                item.Background = Brushes.Blue;
            else if (stName.Contains("yellow"))
                item.Background = Brushes.Yellow;
            else if (stName.Contains("black"))
                item.Background = Brushes.Black;
            else if (stName.Contains("red"))
                item.Background = Brushes.Red;
            else
                item.Background = Brushes.Transparent; // Default background color

            LVw.Items.Add(item);
        }
    }
}

In this code:

• ListItem class is created to hold the name and background color for each item.
• In XAML, a DataTemplate is defined for the ListView items. It consists of a TextBlock wrapped in a Border, and the background of the Border is bound to the Background property of each ListItem.
• In the FillListView method, instead of adding strings directly to the ListView items, you create ListItem objects, set their properties accordingly, and add them to the ListView. This ensures that each item has its own background color.
• Depending on the content of stName, you assign different background colors to each ListItem.