通过事件参数传值

//定义委托
public delegate void ClickEventHander(object sender, ClickEventArgs e);

public Class FrmMenu 
{
public event ClickEventHander NodeMouseClick;

//树节点点击事件
private void tvwSbd_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
         if(NodeMouseClick!=null)
                    NodeMouseClick(sender,new ClickEventArgs (e.Node.Tag));//如果已加载事件，则将参数传递过去
         //打开窗体
}
}

//定义Click事件继承于顶级事件
public class ClickEventArgs:EventArgs
    {
        //需要传递的变量
        private  TreeNode _node;
        
        public TreeNode Node{
            get { return _node; }
        }
        public ClickPorjectDEventArgs(TreeNode node)
        {
            this._node= node;
        }
    }



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/*左边窗体的事情做完了，现在该在右边船体加载事件*/

FrmMenu frmMenu; //左边窗体
MainForm mainForm; //主窗体

 private void InitControls()
        {
            mainForm = this.ParentForm as MainForm; //获取主窗体

            //将两个实例化 
            frmMenu = Portal.gc.Menu;
            mainForm = Portal.gc.MainDialog;

            mainForm = Owner as MainForm;
            frmMenu.NodeMouseClick+=new ClickEventHander(frmMenu_NodeMouseClick);
            this.FormClosed += new FormClosedEventHandler(Logoff);

        }
        string strFileName;
        void frmMenu_NodeMouseClick(object sender, ClickPorjectDEventArgs e)
        {
            // 返回结果 projectid;
            node= e.Node.Tag;
            //
            //得到了传过来的值就可以尽情发挥了
        }
 
        /// 

        /// 关闭窗体后注销事件
        /// 
        /// 
        /// 
        private void Logoff(object sender, EventArgs e)
        {
            frmMenu.NodeMouseClick-= new ClickEventHander(frmMenu_NodeMouseClick);
            frmMenu.DockState = dockState;//菜单窗体先前状态;
        }

//启动类
static class Portal
    {
        // Fields
        public static GlobalControl gc = new GlobalControl(); 
        private static Mutex mutex = null;
}