form1.cs

一个图书管理系统

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace 图书馆
{
    public partial class MainForm : Form
    {
        
        public MainForm()
        {
            InitializeComponent();
        }
        //----------------------查询MDI子窗体是否存在-----------------------------
        private bool checkChildFrmExist(string childFrmName)
        {
            foreach (Form childFrm in this.MdiChildren)
            {
                if (childFrm.Name == childFrmName) //用子窗体的Name进行判断，如果存在则将他激活
                {
                    if (childFrm.WindowState == FormWindowState.Minimized)
                        childFrm.WindowState = FormWindowState.Normal;
                    childFrm.Activate();
                    return true;
                }
            }
            return false;
        }

        //-----------------显示读者类别设置窗体-----------------------
       /* private void menuItem2_Click(object sender, System.EventArgs e)
        {
            //通过窗体名称查询该窗体是否已经存在，如存在则显示，否则就新创建一个
            if (this.checkChildFrmExist("ReaderClassify") == true)
            {
                return;
            }
            ReaderClassify newFrm = new ReaderClassify();
            newFrm.MdiParent = this;
            newFrm.Show();

        }*/

       private void toolStripStatusLabel1_Click(object sender, EventArgs e)
        {

        }

        private void readerToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void toolStripMenuItem1_Click(object sender, EventArgs e)
        {

        }

        private void 类型设置ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //通过窗体名称查询该窗体是否已经存在，如存在则显示，否则就新创建一个
            if (this.checkChildFrmExist("TypeSetting") == true)
            {
                return;
            }
            TypeSetting newFrm = new TypeSetting();
            newFrm.MdiParent = this;
            newFrm.Show();

        }

        private void 档案管理ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.checkChildFrmExist("UserInfoManange") == true)
            {
                return;
            }
            UserInfoManange newFrm = new UserInfoManange();
            newFrm.MdiParent = this;
            newFrm.Show();
        }

        private void 推出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("确实要退出系统吗?", "询问", MessageBoxButtons.YesNo) == DialogResult.Yes)
            {
                Application.Exit();
            }
        }

        private void 借书管理ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            借书管理 newFrm = new 借书管理();
            newFrm.Show();
        }

        private void 还书管理ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            还书管理 newFrm = new 还书管理();
            newFrm.Show();
        }

        private void 预约管理ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            预约管理 newFrm = new 预约管理();
            newFrm.Show();
        }

        private void 罚款ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            罚款 newFrm = new 罚款();
            newFrm.Show();
        }

        private void 关于ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MessageBox.Show("made by 王致富,李欣,袁毅,张亮","关于");
        }

        private void 产品信息ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MessageBox.Show("图书管理系统 V1.0","产品信息");
        }
    }
}