插件的简单原理

using IExtendServices;

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Reflection;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace 插件的简单原理

{

    public class ExtendServices

    {

        private MenuStrip ms = null;

        private RichTextBox txt = null;

        public ExtendServices(MenuStrip ms, RichTextBox txt)

        {

            this.ms = ms;

            this.txt = txt;

        }

        public void Service()

        {

            string[] plugFilesPath = Directory.GetFiles(Path.Combine(Application.StartupPath, "plugs"), "*.dll");
foreach (string itemPath in plugFilesPath)

            {

                Assembly ass = Assembly.LoadFrom(itemPath);

                //获取所有的公共类型

                Type[] assTypes = ass.GetExportedTypes();

                //自定义的接口类型

                Type itype = typeof(IExtendService);

                foreach (Type itemtype in assTypes)

                {

                    if (itemtype.IsPublic && itype.IsAssignableFrom(itemtype) && !itemtype.IsAbstract&&!itemtype.IsInterface)

                    {

                        IExtendService service = (IExtendService)Activator.CreateInstance(itemtype);

                        ToolStripMenuItem editItem = (ToolStripMenuItem)ms.Items[1];
ToolStripItem seritem = editItem.DropDownItems.Add(service.Name);

                        seritem.Tag = service;

                        seritem.Click += SerItemMethod;

                    }

                }
}

        }
private void SerItemMethod(object sender, EventArgs e)

        {

            ToolStripItem service = (ToolStripItem)sender;

            ((IExtendService)service.Tag).Service(txt);

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace CNotePadPlugs

{

    public class ToASCII:IExtendServices.IExtendService

    {

        public string Name

        {

            get { return "ToASCII"; }

        }
public void Service(System.Windows.Forms.RichTextBox txt)

        {
string all = txt.Text;

            string txtSelected = txt.SelectedText;
if (txtSelected == "")

                txtSelected = all;
int index = txt.SelectionStart;//2

            if (index == all.Length)

                index = 0;

            //0

            string start = all.Substring(0, index);//2

            //1

            string upper = all.Substring(index, txtSelected.Length);

            char[] chars = upper.ToCharArray();

            upper = "";

            foreach (char item in chars)

            {

                upper += (int)item;

            }

            //2

            string end = txt.Text.Substring(index + txtSelected.Length);
txt.Text = start + upper + end;
}

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace IExtendServices

{

    public interface IExtendService

    {

        string Name

        {

            get;

        }

        void Service(System.Windows.Forms.RichTextBox txt);

    }

}

源文件：http://pan.baidu.com/s/1ntp0XxZ

插件的简单原理,布布扣,bubuko.com