c#结集

最新推荐文章于 2025-08-14 21:27:18 发布

nsj010

最新推荐文章于 2025-08-14 21:27:18 发布

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CC 4.0 BY-SA版权

文章标签： c# object string thread exception byte

本文链接：https://blog.youkuaiyun.com/nsj010/article/details/4421377

本文介绍了一个使用C#进行网络编程的例子，包括如何处理数据接收、获取应用程序版本号，以及两种实现线程与界面同步通讯的方法，并提供了字符串与字节数组之间的转换示例。

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//1.Application.DoEvents()

public int ReceiveBuffer()

{

int newSize;

strLastError = "没有错误";

try

{

while (true)

{

Application.DoEvents();

if (SocketClient.Poll((int)5, SelectMode.SelectRead) == false)

{

Thread.Sleep(100);

continue;

}

newSize = SocketClient.Receive(Buffer, 0, 1024, SocketFlags.None);

if (newSize == 0)

{

strLastError = "网络通讯关闭错误";

return (-1);

}

return (newSize);

}

catch (Exception e)

{

strLastError = "异常网络接收错误,系统信息:" + e.Message;

return (-1);

}

//2.获得程序自身版本号

using System.Reflection;

Assembly.GetExecutingAssembly().GetName().Version.ToString();

//3.线程与界面窗体同步通讯

方法一用Invoke:

delegate void SetLogCallBack(string msg);

        private void SetLog(string msg)
        {
            try
            {
                if (Textlog.InvokeRequired)
                {
                    SetLogCallBack aSetLog = new SetLogCallBack(SetLog);
                    this.Invoke(aSetLog, new object[] { msg});
                }
                else
                {
                    Textlog.AppendText(msg + "/r/n");
                    Textlog.SelectionStart = Textlog.Text.Length;
                    Textlog.ScrollToCaret();
                }
            }
            catch
            {
            }
        }

方法二event+BeginInvoke:

public delegate void TransactNotifyEventHandler(object sender, TransNotifyEventArgs e);

public class TransManager
{

Thread t;

#region Event
public event TransactNotifyEventHandler TransNotify;

        protected virtual void OnTransNotify(TransNotifyEventArgs e)
        {
            if (TransNotify != null)
            {
                TransNotify(this, e);
            }
        }
        #endregion

        public bool Start()
        {
            t = new Thread(new ThreadStart(this.TransThreadPorc));
            t.Start();
            return true;
        }

private void TransThreadPorc()
{

OnTransNotify(new TransNotifyEventArgs("hello world"));

}

///窗口界面部分

        TransManager transMgr = new TransManager();
        private void FrmMain_Load(object sender, EventArgs e)
        {
          transMgr.TransNotify += new TransactNotifyEventHandler(TransactNotify);
            try
            {
                transMgr.Start();
            }
            catch
            {
            }
        }
        public void TransactNotify(object sender, TransNotifyEventArgs e)
        {
            if (this.InvokeRequired)
            {
                object[] param = new object[2] { sender, e };
                this.BeginInvoke(new TransactNotifyEventHandler(OnTransactNotify), param);
            }
            else
            {
                OnTransactNotify(sender, e);
            }
        }
        private void OnTransactNotify(object sender, TransNotifyEventArgs e)
        {

                    Textlog.AppendText(e.msg + "/r/n");
                    Textlog.SelectionStart = Textlog.Text.Length;
                    Textlog.ScrollToCaret();
        }

//4. string与byte[]转换

System.Text.Encoding.Default.GetString()

System.Text.Encoding.Default.GetBytes()

//int byte 转换

int i;

byte[] b=BitConverter.GetBytes( 0xba5eba11);

i= BitConverter.ToInt32(b, 0);