mainfrm.cs

C#制作的小型图书馆管理系统

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

namespace 图书馆管理系统
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class MainFrm : System.Windows.Forms.Form
	{
		private System.Windows.Forms.MainMenu mainMenu1;
		private System.Windows.Forms.MenuItem menuItem1;
		private System.Windows.Forms.MenuItem menuItem2;
		private System.Windows.Forms.MenuItem menuItem3;
		private System.Windows.Forms.MenuItem menuItem4;
		private System.Windows.Forms.StatusBar statusBar1;
		private System.Windows.Forms.StatusBarPanel statusBarPanel1;
		private System.Windows.Forms.StatusBarPanel statusBarPanel2;
		private System.Windows.Forms.MenuItem menuItem5;
		private System.Windows.Forms.MenuItem menuItem6;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public MainFrm()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(MainFrm));
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			this.menuItem3 = new System.Windows.Forms.MenuItem();
			this.menuItem5 = new System.Windows.Forms.MenuItem();
			this.menuItem6 = new System.Windows.Forms.MenuItem();
			this.menuItem4 = new System.Windows.Forms.MenuItem();
			this.statusBar1 = new System.Windows.Forms.StatusBar();
			this.statusBarPanel1 = new System.Windows.Forms.StatusBarPanel();
			this.statusBarPanel2 = new System.Windows.Forms.StatusBarPanel();
			((System.ComponentModel.ISupportInitialize)(this.statusBarPanel1)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.statusBarPanel2)).BeginInit();
			this.SuspendLayout();
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem1,
																					  this.menuItem2,
																					  this.menuItem3,
																					  this.menuItem4});
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 0;
			this.menuItem1.Text = "读者管理";
			this.menuItem1.Click += new System.EventHandler(this.menuItem1_Click);
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 1;
			this.menuItem2.Text = "图书管理";
			this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
			// 
			// menuItem3
			// 
			this.menuItem3.Index = 2;
			this.menuItem3.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem5,
																					  this.menuItem6});
			this.menuItem3.Text = "借阅管理";
			// 
			// menuItem5
			// 
			this.menuItem5.Index = 0;
			this.menuItem5.Text = "图书借阅";
			this.menuItem5.Click += new System.EventHandler(this.menuItem5_Click);
			// 
			// menuItem6
			// 
			this.menuItem6.Index = 1;
			this.menuItem6.Text = "图书归还";
			this.menuItem6.Click += new System.EventHandler(this.menuItem6_Click);
			// 
			// menuItem4
			// 
			this.menuItem4.Index = 3;
			this.menuItem4.Text = "退出系统";
			this.menuItem4.Click += new System.EventHandler(this.menuItem4_Click);
			// 
			// statusBar1
			// 
			this.statusBar1.Location = new System.Drawing.Point(0, 523);
			this.statusBar1.Name = "statusBar1";
			this.statusBar1.Panels.AddRange(new System.Windows.Forms.StatusBarPanel[] {
																						  this.statusBarPanel1,
																						  this.statusBarPanel2});
			this.statusBar1.ShowPanels = true;
			this.statusBar1.Size = new System.Drawing.Size(784, 22);
			this.statusBar1.TabIndex = 1;
			this.statusBar1.Text = "statusBar1";
			// 
			// statusBarPanel1
			// 
			this.statusBarPanel1.MinWidth = 200;
			this.statusBarPanel1.Text = "四川大学计算机学院";
			this.statusBarPanel1.ToolTipText = "四川大学计算机学院";
			this.statusBarPanel1.Width = 500;
			// 
			// statusBarPanel2
			// 
			this.statusBarPanel2.MinWidth = 100;
			this.statusBarPanel2.Text = "谢乾文    陈适雨";
			this.statusBarPanel2.ToolTipText = "谢乾文    陈适雨";
			this.statusBarPanel2.Width = 200;
			// 
			// MainFrm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.BackColor = System.Drawing.SystemColors.Desktop;
			this.ClientSize = new System.Drawing.Size(784, 545);
			this.Controls.Add(this.statusBar1);
			this.HelpButton = true;
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.IsMdiContainer = true;
			this.Menu = this.mainMenu1;
			this.Name = "MainFrm";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "【图书馆管理系统】";
			this.Load += new System.EventHandler(this.MainFrm_Load);
			((System.ComponentModel.ISupportInitialize)(this.statusBarPanel1)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.statusBarPanel2)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new MainFrm());
		}

//－－－－－－－－－－－－－－－ 添加自己的代码－－－－－－－－－－－－－－－－－－//
		//----------------------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;
		}

		//-----------------显示读者信息设置窗体-----------------------
		private void menuItem1_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("Reader") == true)
			{
				return;
			}
			Reader newFrm=new Reader();
			newFrm.MdiParent = this;
			newFrm.Show();
		}

		//-----------------显示图书信息设置窗体-----------------------
		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("Book") == true)
			{
				return;
			}
			Book newFrm=new Book();
			newFrm.MdiParent = this;
			newFrm.Show();
		}

		//-----------------显示图书借阅设置窗体-----------------------
		private void menuItem5_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("Borrow") == true)
			{
				return;
			}
			Borrow newFrm=new Borrow();
			newFrm.MdiParent = this;
			newFrm.Show();
		}

		//-----------------显示图书归还设置窗体-----------------------
		private void menuItem6_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("Return") == true)
			{
				return;
			}
			Return newFrm=new Return();
			newFrm.MdiParent = this;
			newFrm.Show();
		}


		//----------------------关闭系统-------------------------------
		private void menuItem4_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}

		private void MainFrm_Load(object sender, System.EventArgs e)
		{
		
		}
	}
}