C＃WPF获取错误 –System.InvalidOperationException：_语言综合

概述C＃WPF获取错误 – System.InvalidOperationException：

我刚刚开始学习使用C＃WPF开发windows应用程序，并且我们已经给自学项目开发了一个windows应用程序。我试图创build应用程序聊天客户端到客户端。我创build了一个类MainWindow.xaml和MainWindow.xaml.cs来处理。当我从主窗体调用该类时，我收到以下错误。

这是两个阶级：

using System; using System.Collections.Generic; using System.linq; using System.Text; using System.Threading.Tasks; using System.windows; using System.windows.Controls; using System.windows.Data; using System.windows.documents; using System.windows.input; using System.windows.Media; using System.windows.Media.Imaging; using System.windows.Navigation; using System.windows.Shapes; using System.Net; using System.Net.sockets; namespace Chat_ClIEnt { public partial class MainWindow : Window { Socket sck; EndPoint epLocal,epRemote; public MainWindow() { InitializeComponent(); sck = new Socket(AddressFamily.InterNetwork,SocketType.Dgram,ProtocolType.Udp); sck.SetSocketoption(SocketoptionLevel.socket,Socketoptionname.ReuseAddress,true); textLocalip.Text = GetLocaliP(); textFrIEndsIp.Text = GetLocaliP(); } private string GetLocaliP() { IPHostEntry host; host = Dns.GetHostEntry(Dns.GetHostname()); foreach(IPAddress ip in host.AddressList) { if (ip.AddressFamily == AddressFamily.InterNetwork) { return ip.ToString(); } } return "127.0.0.1"; } private voID MessageCallBack(IAsyncResult aResult) { try { int size = sck.EndReceiveFrom(aResult,ref epRemote); if (size > 0) { byte[] recIEvedData = new byte[1464]; recIEvedData = (byte[])aResult.AsyncState; ASCIIEnCoding eEnCoding = new ASCIIEnCoding(); string recIEvedMessage = eEnCoding.GetString(recIEvedData); ListMessage.Items.Add("MerID: " + recIEvedMessage); } byte[] buffer = new byte[1500]; sck.BeginReceiveFrom(buffer,buffer.Length,SocketFlags.None,ref epRemote,new AsyncCallback(MessageCallBack),buffer); } catch(Exception exp) { MessageBox.Show(exp.ToString()); } } private voID textBox2_TextChanged(object sender,TextChangedEventArgs e) { } private voID button_Click(object sender,RoutedEventArgs e) { try { epLocal = new IPEndPoint(IPAddress.Parse(textLocalip.Text),Convert.ToInt32(textLocalPort.Text)); sck.Bind(epLocal); epRemote = new IPEndPoint(IPAddress.Parse(textFrIEndsIp.Text),Convert.ToInt32(textFrIEndsPort.Text)); sck.Connect(epRemote); byte[] buffer = new byte[1500]; sck.BeginReceiveFrom(buffer,buffer); button.Content = "Connected"; button.IsEnabled = false; button1.IsEnabled = true; textMessage.Focus(); } catch(Exception ex) { MessageBox.Show(ex.ToString()); } } private voID button1_Click(object sender,RoutedEventArgs e) { try { System.Text.ASCIIEnCoding enc = new System.Text.ASCIIEnCoding(); byte[] msg = new byte[1500]; msg = enc.GetBytes(textMessage.Text); sck.Send(msg); ListMessage.Items.Add("Bod: "+textMessage); textMessage.Clear(); } catch(Exception excp) { MessageBox.Show(excp.ToString()); } } }

}

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