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c# - C# WPF 在套接字发送和接收数据时显示加载屏幕 C#

问题描述

我正在构建一个 WPF 应用程序，它使用套接字将数据传入和传出服务器。问题：在从服务器发送和接收数据时，屏幕被冻结，我想添加一个简单的加载动画，以便最终用户知道它当前正在加载，但我不知道如何

我的 C# 套接字代码：

public static string SendRecOne(string dataToSvr)
    {
        TcpClient client = new TcpClient(SERVER_NAME, PORT);
        #region SendRequest
        int ByteCount = Encoding.ASCII.GetByteCount(dataToSvr); //How much bytes?
        byte[] ByteBuffer = new byte[1024]; //initialize byte array
        ByteBuffer = Encoding.ASCII.GetBytes(dataToSvr);
        NetworkStream stream = client.GetStream();
        stream.Write(ByteBuffer, 0, ByteBuffer.Length);
        #endregion
        #region Receive Response
        //byte[] responseData = new byte[client.ReceiveBufferSize];
        //int bytesRead = stream.Read(responseData, 0, client.ReceiveBufferSize);
        int i;
        string ToReturn = null;
        ByteBuffer = new byte[ByteBuffer.Length];
        MemoryStream ms = new MemoryStream();
        while (true)
        {
            if (stream.DataAvailable)
            {
                while ((i = stream.Read(ByteBuffer, 0, ByteBuffer.Length)) != 0)
                {
                    ms.Write(ByteBuffer, 0, ByteBuffer.Length);
                    if (stream.DataAvailable)
                        continue;
                    else
                        break;
                }
                ToReturn = Encoding.ASCII.GetString(ms.ToArray());
                return ToReturn;
            }
        }
        #endregion

我在按下窗口中名为“login.xaml”的按钮后调用它，并在检查数据正常后，它关闭当前窗口并初始化dashboard.xaml。我只需要在与服务器通信时添加一个动画。

谢谢！

标签： c#wpfsockets

解决方案

在后台线程上调用您的SendRecOne方法或使用 *Async 重载使其异步：

public static async Task<string> SendRecOne(string dataToSvr)
{
    progressBar.Visibility = Visibility.Visible;
    string ToReturn = null;
    using (TcpClient client = new TcpClient(SERVER_NAME, PORT))
    {
        int ByteCount = Encoding.ASCII.GetByteCount(dataToSvr); //How much bytes?
        byte[] ByteBuffer = new byte[1024]; //initialize byte array
        ByteBuffer = Encoding.ASCII.GetBytes(dataToSvr);
        NetworkStream stream = client.GetStream();
        await stream.WriteAsync(ByteBuffer, 0, ByteBuffer.Length);

        //byte[] responseData = new byte[client.ReceiveBufferSize];
        //int bytesRead = await stream.ReadAsync(responseData, 0, client.ReceiveBufferSize);
        int i;
        ByteBuffer = new byte[ByteBuffer.Length];
        MemoryStream ms = new MemoryStream();
        if (stream.DataAvailable)
        {
            while ((i = await stream.ReadAsync(ByteBuffer, 0, ByteBuffer.Length)) != 0)
            {
                await ms.WriteAsync(ByteBuffer, 0, ByteBuffer.Length);
                if (!stream.DataAvailable)
                    break;
            }
            ToReturn = Encoding.ASCII.GetString(ms.ToArray());
        }
        progressBar.Visibility = Visibility.Collapsed;
    }
    return ToReturn;
}

XAML：

<ProgressBar x:Name="progressBar" IsIndeterminate="True" />

UI 线程不能同时处理消息和执行您的代码。

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