wpf 使进度条可从方法访问

如何解决wpf 使进度条可从方法访问

我骑了一个代码，它将不同单词的数量放在数据网格的 txt 文件中。现在我正在尝试添加一个进度条，但我无法通过组织单词的方法访问它。不幸的是，我被告知我必须在方法中拆分、计数等（​​我不能在 start() 中执行此操作）。有没有人知道如何做到这一点？

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        
    }
    
    private void start(object sender,RoutedEventArgs e)
    {
        string path = txtBox_path.Text;
        string unordered = readFile(path);
        var ordered = count(unordered);
        progressbar_1.Maximum = ordered.Count;
        foreach(var obj in ordered)
        {
            datagrid_table.Items.Add(obj);
            progressbar_1.Value += 1;
        }
    }
    private string readFile(string filePath)
    {
        string content = string.Empty;
        try
        {
            content = File.ReadAllText(filePath);
        }
        catch (Exception e)
        {
            lbl_warning.Content=e.Message;
        }
        return content;
    }
    public static IDictionary count(string input)
    {
        var split = input.Split();
        var grouped = split.GroupBy(x => x);
        var ordered = grouped.OrderBy(x => x.Key);
        
        var counted = from s in ordered
                      select new
                      {
                          word = s.Key,number = split.Where(x => x.Equals(s.Key)).Count()
                      };
        
        var asList = counted.ToList();
        
        var orderedByNumber = asList.OrderByDescending(x => x.number);
       

        var whitespacesRemoved = orderedByNumber.Where(x => !String.IsNullOrWhiteSpace(x.word));
       
        var asDict = whitespacesRemoved.ToDictionary(p => p.word,p => p.number);
       
        return asDict;
    }

    private void stop(object sender,RoutedEventArgs e)
    {
        this.Close();
    }
}