在panel動態添加顯示窗口

 

在一個主窗口中，有一個panel，點擊樹形結構的節點，在panel中顯示窗口

 

using System;
using System.Collections;
using System.Text;
using System.Reflection;

namespace MengYe
{
    /// <summary>
    /// 導入的類
    /// </summary>
    class InstanceFactory
    {
        private static Hashtable ServiceList = new Hashtable();
        /// <summary>
        /// 使用反射生成指定的服務對象,將調用服務類的默認構造函數。
        /// </summary>
        /// <param name="serviceType"></param>
        /// <returns></returns>
        public static Object CreateInstance(Type type)
        {
            if (type == null)
                return null;

            if (ServiceList.Contains(type)) return ServiceList[type];

            ConstructorInfo constor = type.GetConstructor(Type.EmptyTypes);

            Object obj = constor.Invoke(new Object[0]);

            ServiceList.Add(type, obj);

            return obj;
        }
        /// <summary>
        /// 根據指定構造函數的參數數組，調用相應的構造函數生成對象。
        /// </summary>
        /// <param name="type">類型</param>
        /// <param name="args">構造參數數組</param>
        /// <returns></returns>
        public static Object CreateInstance(Type type, Object[] args)
        {
            if (type == null) return null;
            //如果構造參數列表爲空或長度爲0，將轉爲默認構造函數生成對象。
            if (args == null || args.Length == 0)
            {
                return CreateInstance(type);
            }
            Type[] types = new Type[args.Length];

            //獲取構造函數數組的類型
            for (int i = 0; i < args.Length; i++)
            {
                types[i] = args[i].GetType();
            }

            ConstructorInfo constor = type.GetConstructor(types);

            if (constor != null)
            {
                try
                {
                    return constor.Invoke(args);
                }
                catch { }
            }
            return null;
        }

        public static Object CreateInstance(String className)
        {
            return CreateInstance(Type.GetType(className, true));
        }

        public static Object CreateInstance(String className, Object[] args)
        {
            return CreateInstance(Type.GetType(className, true), args);
        }
    }
}

在主窗口中寫：

/// <summary>
        /// 樹形節點的點擊事件
        /// </summary>
        /// <param name="obj"></param>
        /// <param name="e"></param>
        private void Tv_userpower_Select(object obj, TreeViewEventArgs e)
        {
            TreeNode selectnode = e.Node;
            if (selectnode.Name.ToString ().Trim().Length > 0)
            {
                string classString = selectnode.Name.ToString();
                string powername = selectnode.Text.ToString();
                this.lab_model.Text = "當前所在位置：" + powername;
                AddPanel(classString);
            }
        }
        /// <summary>
        /// 顯示窗口到選項卡中
        /// </summary>
        /// <param name="classString">窗口的名字</param>
        private void AddPanel(string classString)
        {
            this.panel_form.Controls.Clear();
            //傳進去一個大panel用於裝用戶建的panel
            Object o = InstanceFactory.CreateInstance(classString, new Object[1] { this.panel_form});
            UserControl frm = o as UserControl;
        }

要顯示的窗口修改爲：

public partial class Employee : UserControl
    {
        public Employee(Control  container)
        {
            container.SuspendLayout();
            InitializeComponent();
            this.Dock = DockStyle.Fill;
            container.Controls.Add(this);
            container.ResumeLayout(false);
            container.PerformLayout();
        }
    }