如何从C#中的另一个线程更新GUI上的文本框[复制]

我的客户端窗体中有RichTextBox,我正在尝试从另一个类中的服务器更新该控件.当我尝试这样做时,我得到错误：“跨线程操作无效：控制textBox1从一个线程以外的线程而被创建”.

这里我的Windows窗体的代码：

private Topic topic;  
public RichTextBox textbox1;  
bool check = topic.addUser(textBoxNickname.Text,ref textbox1,ref listitems);

主题类：

public class Topic : MarshalByRefObject  
{  
    //Some code
 public  bool addUser(string user,ref RichTextBox textBox1,ref List<string> listBox1)  
 {  
     //here i am trying to update that control and where i get that exception  
     textBox1.Text += "Connected to server... n";  
}

那怎么办呢？如何从另一个线程更新文本框控件？

我试图使用.net远程处理使一些基本的聊天客户端/服务器应用程序.
我想使窗体客户端应用程序和控制台服务器应用程序作为单独的.exe文件.这里我试图从客户端调用服务器功能AddUser,我想要AddUser函数更新我的GUI.我修改了代码,因为你建议Jon但现在,而不是跨线程异常我有这个异常…“SerializationException：类型主题在程序集没有标记为可序列化”.

不幸发表我的整个代码,将尽可能保持简单.
欢迎任何建议.非常感谢.

服务器：

namespace Test
{
    [Serializable]
    public class Topic : MarshalByRefObject
    {
        public bool AddUser(string user,RichTextBox textBox1,List<string> listBox1)
        {
            //Send to message only to the client connected
            MethodInvoker action = delegate { textBox1.Text += "Connected to server... n"; };
            textBox1.BeginInvoke(action);
            //...
            return true;
        }

        public class TheServer
        {
            public static void Main()
            {

                int listeningChannel = 1099;

                BinaryServerFormatterSinkProvider srvFormatter = new BinaryServerFormatterSinkProvider();
                srvFormatter.TypeFilterLevel = TypeFilterLevel.Full;

                BinaryClientFormatterSinkProvider clntFormatter = new BinaryClientFormatterSinkProvider();

                IDictionary props = new Hashtable();
                props["port"] = listeningChannel;

                HttpChannel channel = new HttpChannel(props,clntFormatter,srvFormatter);
                // Register the channel with the runtime            
                ChannelServices.RegisterChannel(channel,false);
                // Expose the Calculator Object from this Server
                RemotingConfiguration.RegisterWellKnownServiceType(typeof(Topic),"Topic.soap",WellKnownObjectMode.Singleton);
                // Keep the Server running until the user presses enter
                Console.WriteLine("The Topic Server is up and running on port {0}",listeningChannel);
                Console.WriteLine("Press enter to stop the server...");
                Console.ReadLine();
            }
        }
    }

}

Windows窗体客户端：

// Create and register a channel to communicate to the server
        // The Client will use the port passed in as args to listen for callbacks

        BinaryServerFormatterSinkProvider srvFormatter = new BinaryServerFormatterSinkProvider();
        srvFormatter.TypeFilterLevel = TypeFilterLevel.Full;
        BinaryClientFormatterSinkProvider clntFormatter = new BinaryClientFormatterSinkProvider();
        IDictionary props = new Hashtable();
        props["port"] = 0;

        channel = new HttpChannel(props,srvFormatter);
        //channel = new HttpChannel(listeningChannel);

        ChannelServices.RegisterChannel(channel,false);
        // Create an instance on the remote server and call a method remotely
        topic = (Topic)Activator.GetObject(typeof(Topic),// type to create
        "http://localhost:1099/Topic.soap" // URI
        );


        private Topic topic;
        public RichTextBox textbox1;
        bool check = topic.addUser(textBoxNickname.Text,textBox1,listitems);