Question

//selects the movie option, this will populate the movie lists (titles only)
    private void btnMovies_Click(object sender, EventArgs e)
    {
        int size = 0;
        string titles = null;
        byte[] dataSend = new byte[1024];
        byte[] dataReceive = new byte[1024];
        string[] split = null;
        movieList.Items.Clear();
        movietitles.Clear();
        try
        {

            Array.Clear(dataSend, 0, dataSend.Length);
            dataSend = Encoding.ASCII.GetBytes("movies");
            socket.Send(dataSend);
            size = socket.Receive(dataReceive);//receive movie titles
            titles = Encoding.ASCII.GetString(dataReceive, 0, size);
            char[] separators = { ';' };
            split = titles.Split(separators);

            for (int i =0;i<split.Count();i++)
            {
                movietitles.Add(split[i]);
            }

            foreach (string smovie in movietitles)
            {
                movieList.Items.Add(smovie);
            }


        }
        catch (SocketException ex)
        {
            lblError.Text = "Unable to connect to server";
            lblError.Text += ex;
        }

        pnlMovies.Visible = true;


    }

所以这里发生的事情是我在movietitles列表中填充movieList（列表框）中的电影标题。然而，每当我再次按下按钮电影时，它会再次填充它而不清除前一个，即使我清除了它。我为movietitles打印出了.count，每次都会增加一倍，所以它的定义就是问题。

我已经.Clear（）它，所以我不知道我还能做些什么。我重置了所有变量，但没有任何作用。谢谢！

Answer 1

我认为如果将ListBox绑定到数据源可能会更好。类似的东西：

//populate your List with your movie titles
private List<String> movieTitles = new List<string>() { "movie1", "movie2", "movie3" };
//Then bind the datasource
movieList.ItemSource = movieTitles;

列表不清楚！ C＃

1 个答案: