如何使用StreamReader在C＃中从一个WPF窗口向另一个窗口输入文本？

Question

My problem is this, I am writing some software in WPF C# and I need to makeit so that the MainWindow will parse the txt file I have made and store the information in a data structure, the data should be passed to the second Window when it is opened. I have the StreamReader code working fine, it can locate the txt file, but it won't show the information in the listbox on the second window (I apologize if I have screwed up the formatting, very new to the website)

namespace ACW2
{

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void inventoryButton_Click(object sender, RoutedEventArgs e)
    {
        InventoryWindow wnd = new InventoryWindow();
        wnd.ShowDialog();



        string line;                                                                     
        StreamReader file = new StreamReader(@"G:\P1\txt_files\inventory.txt");
        List<int> list = new List<int>();
        while ((line = file.ReadLine()) != null) ;
        {
            ListBox.Items.Add.(Line);
            list.Add(int.Parse(line));
        }
    }

Answer 1

you have few problems here:

• semicolon on while ((line = file.ReadLine()) != null) ; line which means that next code block (in curly braces) will not be executed in the loop, but after the loop ends.
• What is Line (with capital L) which you are adding to ListBox.Items collection? Where is that Line defined and what is it's value?
• what is line (lowercase L this time)?

try to fix those errors and we'll see what's next to be done...

Answer 2

What do you want to reach with

ListBox.Items.Add.(Line);

Maybe you mean this:

ListBox.Items.Add.(line);

You also dont need the semicolon at the end of your while statement.

Edit: Specify your ListBox on the second window with a x:Name = "myListBox" tag. After you did that you should be able to add an element to the listbox with wnd.myListBox.Items.Add(line);