Question

我试图从我的MainWindow.xaml.cs调用以下方法，但我不确定如何操作。

        public static string TileString(int x, int y, int z)
        {
            int[] tileInts = { x, y, z };
            string tileString = string.Join("/", tileInts);
            return tileString;
        }

该方法驻留在具有从数据库获取图像的某些功能的类中，并且我想要使用这些图像的名称/ id更新我在MainWindow中的文本框。该功能正常工作，并在＆＃34; tileString＆＃34;中返回。但是，我不确定如何将它与我的MainWindow结合在一起。任何提示？在最佳世界中，我只能说（在MainWindow.xaml.cs中）ServerOutPutTextBox.Appendtext（tileString）; （我希望它显示在文本框中），但它无法找到它。

我想象以下内容：

            public static string TileString(int x, int y, int z)
            {
                int[] tileInts = { x, y, z };
                string tileString = string.Join("/", tileInts);

                ServerOutPutTextBox.Appendtext(tilestring);
            }

或以某种方式在我的MainWindow.xaml.cs中调用TileString。

编辑：全班同学。

public class Response
{
    public static string tileString;
    public static List<string> DbLocationList;
    public static HttpListener listener;
    public static void StartListening(List<string> prefixes, List<string> dbLocation)
    {
        if( listener  == null )
            listener = new HttpListener();

        //if (prefixes == null || prefixes.Count == 0)
        //    throw new ArgumentException("Prefixes missing.");

        DbLocationList = dbLocation;


        foreach (string s in prefixes)
        {
            listener.Prefixes.Add(s);
        }

        try
        {
            listener.Start();
            listener.BeginGetContext(new AsyncCallback(OnRequest), listener);
        }
        catch (Exception exception)
        {
            MessageBox.Show(exception.Message);
        }
    }

    public static void OnRequest(IAsyncResult result)
    {
        //HttpListener listener = (HttpListener) result.AsyncState;
        if (listener == null)
            return;

        HttpListenerContext context = listener.EndGetContext(result);
        listener.BeginGetContext(new AsyncCallback(OnRequest), listener);

        string url = context.Request.RawUrl;

        string[] split = url.Split('/');

        int lastIndex = split.Length - 1;

        HttpListenerResponse response = context.Response;

        int x, y, z;
        string prefix;
        string dbPath = "";
        try
        {
            prefix = split[lastIndex - 3];
            x = Convert.ToInt32(split[lastIndex - 1]);
            y = Convert.ToInt32(split[lastIndex]);
            z = Convert.ToInt32(split[lastIndex - 2]);

            foreach (var path in DbLocationList)
            {
                string[] tmpStrings = path.Split('\\');
                string dbFn = tmpStrings[tmpStrings.Length-1];
                if (prefix == dbFn)
                {
                    dbPath = path;
                    break;
                }
            }

            // To extract from the database
            TilePicker picker = new TilePicker(dbPath);
            Image img = picker.GetTile(x, y, z);
            TileString(x, y, z);

            if (img == null)
            {
                response.StatusCode = 404;
                response.OutputStream.Close();
            }
            else
            {
                // Load the image
                //Bitmap bm = new Bitmap(path);
                MemoryStream bmStream = new MemoryStream();
                //bm.Save(bmStream, ImageFormat.Png);
                img.Save(bmStream, ImageFormat.Png);
                byte[] buffer = bmStream.ToArray();


                // Get a response stream and write the response to it.
                response.ContentLength64 = bmStream.Length;
                response.ContentType = "image/png";
                response.KeepAlive = true;
                Stream output = response.OutputStream;
                output.Write(buffer, 0, buffer.Length);

                // You must close the output stream.
                output.Close();
            }
                //listener.Stop();
            //}

            response.Close();
        }
        catch (Exception)
        {
            response.StatusCode = 404;
            response.OutputStream.Close();
        }
    }

    public static string TileString(int x, int y, int z)
    {
        int[] tileInts = { x, y, z };
        string tileString = string.Join("/", tileInts);
        return tileString;
    }
}

Answer 1

解决此问题的一种方法是，向MainWindow添加一个公共方法，并从TileString访问该方法：

// add this method to MainWindow
public void AppendServerOutput(string output)
{
    ServerOutPutTextBox.Appendtext(output);
}

你可以像以下一样使用它：

public static string TileString(int x, int y, int z)
{
    ...

    Application.Current.Dispatcher.Invoke(new Action(() =>
    {
        var mainWindow = Application.Current.MainWindow as MainWindow;
        mainWindow.AppendServerOutput(tileString);
    }));
}

从MainWindow.xaml.cs调用方法

1 个答案: