读取INI文件调用DLL动态生成菜单

最新推荐文章于 2024-04-25 16:55:57 发布

原创最新推荐文章于 2024-04-25 16:55:57 发布 · 1.8k 阅读

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CC 4.0 BY-SA版权

文章标签：

#ini #dll #string #buffer #assembly #menu

本文介绍了一种使用C#动态加载菜单项和DLL的方法。通过读取INI配置文件来确定要加载的DLL及菜单项，实现了菜单的动态生成。文章详细展示了如何通过反射机制加载指定DLL并创建相应实例。

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using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Runtime.InteropServices;
using System.Reflection;

namespace menuTest
{
    public partial class frmMain : Form
    {

        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, byte[] retVal, int size, string filePath);
        private Control AppForm;
        private string PATH = "d:/ERP.ini";
        public frmMain()
        {
            InitializeComponent();
        }

        //public string iniRead(string section, string key, string path)
        //{
        //    StringBuilder temstring = new StringBuilder(255);
        //    int i = GetPrivateProfileString(section, key, "", temstring, 255, path);
        //    return temstring.ToString();
        //}

        private void ssToolStripMenuItem_Click(object sender, EventArgs e)
        {
            NameValueCollection values = new NameValueCollection();
            ReadSectionValues("MENU", values);
            ToolStripMenuItem tsi = new ToolStripMenuItem();
            System.Reflection.Assembly assembly = null;
            ToolStripMenuItem tsitem;

            for (int i = 0; i < values.Count; i++)
            {
                string [] value = values.GetValues(i);
                assembly = System.Reflection.Assembly.LoadFile("d:/" + value[0]);
                AppForm = (Control)assembly.CreateInstance("ctlMenu.uControl1");
                tsitem = (ToolStripMenuItem)(((MenuStrip)AppForm.Controls[0]).Items[0]);
                tsi.DropDownItems.Add(tsitem);
            }
            tsi.Text = "MENU";
            this.menuStrip1.Items.Add(tsi);

            ////生成个菜单项实例，作为主菜单项。
            //ToolStripMenuItem tsi = new ToolStripMenuItem();

            //System.Reflection.Assembly assembly = null;
            ////存放读取的INI文件内容
            //string value = "";
            ////读取INI文件
            //value = iniRead("MENU", "TEST1", "d:/ERP.ini");
            ////添加引用
            //assembly = System.Reflection.Assembly.LoadFile("d:/" + value);
            ////创建实例
            //AppForm = (Control)assembly.CreateInstance("ctlMenu.uControl1");

            ////将DLL中的MenuStrip作为单个菜单项
            //ToolStripMenuItem tsitem = (ToolStripMenuItem)(((MenuStrip)AppForm.Controls[0]).Items[0]);
            ////将菜单项放入子菜单中
            ////tsi.DropDownItems.Add(((MenuStrip)AppForm.Controls[0]).Items[0].Text.ToString());
            //tsi.DropDownItems.Add(tsitem);

            //tsi.Text = "MENU";
            //this.menuStrip1.Items.Add(tsi);

        }
        //读取指定INI文件
        private string ReadString(string Section, string Ident, string Default,string path)
        {
            Byte[] Buffer = new Byte[65535];
            int bufLen = GetPrivateProfileString(Section, Ident, Default, Buffer, Buffer.GetUpperBound(0), path);
            //必须设定0（系统默认的代码页）的编码方式，否则无法支持中文
            string s = Encoding.GetEncoding(0).GetString(Buffer);
            s = s.Substring(0, bufLen);
            return s.Trim();
        }

        private void GetStringsFromBuffer(Byte[] Buffer, int bufLen, StringCollection Strings)
        {
            Strings.Clear();
            if (bufLen != 0)
            {
                int start = 0;
                for (int i = 0; i < bufLen; i++)
                {
                    if ((Buffer[i] == 0) && ((i - start) > 0))
                    {
                        String s = Encoding.GetEncoding(0).GetString(Buffer, start, i - start);
                        Strings.Add(s);
                        start = i + 1;
                    }
                }
            }
        }
        //从Ini文件中，将指定的Section名称中的所有Ident添加到列表中
        private void ReadSection(string Section, StringCollection Idents)
        {
            Byte[] Buffer = new Byte[16384];
            int bufLen = GetPrivateProfileString(Section, null, null, Buffer, Buffer.GetUpperBound(0), PATH);
            //对Section进行解析
            GetStringsFromBuffer(Buffer, bufLen, Idents);
        }
        //读取指定的Section的所有Value到列表中
        private void ReadSectionValues(string Section, NameValueCollection Values)
        {
            StringCollection KeyList = new StringCollection();
            ReadSection(Section, KeyList);
            Values.Clear();
            foreach (string key in KeyList)
            {
                Values.Add(key, ReadString(Section, key, "", PATH));
            }

        }

private void ddToolStripMenuItem_Click(object sender, EventArgs e)
{

//调用DLL中函数

            //Form2 frm2 = new Form2();
            //string value = "";
            ////读取INI文件
            //value = iniRead("MENU", "TEST1", "d:/ERP.ini");
            ////加引用
            //Assembly ass = Assembly.LoadFrom("d:/" + value);
            ////取类的类型
            //Type type = ass.GetType("ctlMenu.uControl1");
            ////实例此类
            //Object obj = Activator.CreateInstance(type);
            ////获取此类的方法，frmShow为类的方法名称
            //MethodInfo mi = type.GetMethod("frmShow");
            //Object[] obj1 ={ (Object)frm2 };
            //frm2.MdiParent = this;
            ////使用方法
            //mi.Invoke(obj, obj1);
        }

}
}

***********************************************************************************************************

INI文件:

[MENU]
TEST1=ctlMenu.dll
TEST2=aa.dll