public void InitClient()  //窗体控件已在初始化
        {
            interfaceUpdateHandle = new HandleInterfaceUpdateDelegate(btnSend_Click);  //实例化委托对象

            spSend.Open();  //SerialPort对象在程序结束前必须关闭，在此说明

            spReceive.DataReceived += Ports.SerialDataReceivedEventHandler(spReceive_DataReceived);

            spReceive.ReceivedBytesThreshold = 1;

            spReceive.Open();
        }
显示错误为

错误    1    当前上下文中不存在名称“Ports”    ，不知道怎么改

new一个新事件
spReceive.DataReceived +=new (spReceive_DataReceived);
直接赋值
spReceive.DataReceived += spReceive_DataReceived;

[ 本帖最后由 shangsharon 于 2013-10-17 14:23 编辑 ]

谢谢，这个问题解决了，但居然没出来结果，怎么会没反应呢？您看看这样可以吗？
        private void spReceive_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            interfaceUpdateHandle = new HandleInterfaceUpdateDelegate(btnSend_Click);  //实例化委托对象

            spSend.Open();

            spReceive.DataReceived += new (spReceive_DataReceived);

            spReceive.DataReceived += spReceive_DataReceived;

            spReceive.ReceivedBytesThreshold = 1;

            spReceive.Open();

            byte[] readBuffer = new byte[spReceive.ReadBufferSize];

            spReceive.Read(readBuffer, 0, readBuffer.Length);

            this.Invoke(interfaceUpdateHandle, new string[] { Encoding.Unicode.GetString(readBuffer) });

        }
        private void UpdateTextBox(string text)
        {
            txtReceive.Text = text;
            MessageBox.Show("数据接收成功！", "系统提示");
        }

没弄过.

1.
spReceive.DataReceived += new (spReceive_DataReceived);
2.
spReceive.DataReceived += spReceive_DataReceived;
两个是等价的,只需要写一个就行了

一个还是不行，不过还是非常谢谢您，谢谢啦

。。。