mainfrm.cs

这是用SQL数据库做的学生信息管理系统。简明

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

namespace 学生与成绩
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class MainFrm : System.Windows.Forms.Form
	{
		public static bool lg=false;
		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.MenuItem menuItem5;
		private System.Windows.Forms.MenuItem menuItem6;
		private System.Windows.Forms.MenuItem menuItem7;
		private System.Windows.Forms.MenuItem menuItem8;
		private System.Windows.Forms.MenuItem menuItem9;
		private System.Windows.Forms.MenuItem menuItem10;
		private System.Windows.Forms.MenuItem menuItem11;
		private System.Windows.Forms.MenuItem menuItem12;
		private System.Windows.Forms.MenuItem menuItem13;
		private System.Windows.Forms.MenuItem menuItem14;
		/// <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()
		{
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.menuItem4 = new System.Windows.Forms.MenuItem();
			this.menuItem5 = new System.Windows.Forms.MenuItem();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			this.menuItem6 = new System.Windows.Forms.MenuItem();
			this.menuItem7 = new System.Windows.Forms.MenuItem();
			this.menuItem8 = new System.Windows.Forms.MenuItem();
			this.menuItem9 = new System.Windows.Forms.MenuItem();
			this.menuItem10 = new System.Windows.Forms.MenuItem();
			this.menuItem11 = new System.Windows.Forms.MenuItem();
			this.menuItem3 = new System.Windows.Forms.MenuItem();
			this.menuItem12 = new System.Windows.Forms.MenuItem();
			this.menuItem13 = new System.Windows.Forms.MenuItem();
			this.menuItem14 = new System.Windows.Forms.MenuItem();
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem1,
																					  this.menuItem2,
																					  this.menuItem3});
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 0;
			this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem4,
																					  this.menuItem5});
			this.menuItem1.Text = "用户设置";
			// 
			// menuItem4
			// 
			this.menuItem4.Index = 0;
			this.menuItem4.Text = "管理员";
			this.menuItem4.Click += new System.EventHandler(this.menuItem4_Click);
			// 
			// menuItem5
			// 
			this.menuItem5.Index = 1;
			this.menuItem5.Text = "普通用户";
			this.menuItem5.Click += new System.EventHandler(this.menuItem5_Click);
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 1;
			this.menuItem2.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem6,
																					  this.menuItem7});
			this.menuItem2.Text = "数据浏览与查询";
			// 
			// menuItem6
			// 
			this.menuItem6.Index = 0;
			this.menuItem6.Text = "数据浏览";
			// 
			// menuItem7
			// 
			this.menuItem7.Index = 1;
			this.menuItem7.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem8,
																					  this.menuItem9,
																					  this.menuItem10,
																					  this.menuItem11});
			this.menuItem7.Text = "数据查询";
			// 
			// menuItem8
			// 
			this.menuItem8.Index = 0;
			this.menuItem8.Text = "个人成绩";
			this.menuItem8.Click += new System.EventHandler(this.menuItem8_Click);
			// 
			// menuItem9
			// 
			this.menuItem9.Index = 1;
			this.menuItem9.Text = "班级学生情况";
			this.menuItem9.Click += new System.EventHandler(this.menuItem9_Click);
			// 
			// menuItem10
			// 
			this.menuItem10.Index = 2;
			this.menuItem10.Text = "班级学生情况2";
			this.menuItem10.Click += new System.EventHandler(this.menuItem10_Click);
			// 
			// menuItem11
			// 
			this.menuItem11.Index = 3;
			this.menuItem11.Text = "班级成绩";
			this.menuItem11.Click += new System.EventHandler(this.menuItem11_Click);
			// 
			// menuItem3
			// 
			this.menuItem3.Index = 2;
			this.menuItem3.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem12,
																					  this.menuItem13,
																					  this.menuItem14});
			this.menuItem3.Text = "数据维护";
			// 
			// menuItem12
			// 
			this.menuItem12.Index = 0;
			this.menuItem12.Text = "班级学生情况";
			this.menuItem12.Click += new System.EventHandler(this.menuItem12_Click);
			// 
			// menuItem13
			// 
			this.menuItem13.Index = 1;
			this.menuItem13.Text = "添加课程";
			this.menuItem13.Click += new System.EventHandler(this.menuItem13_Click);
			// 
			// menuItem14
			// 
			this.menuItem14.Index = 2;
			this.menuItem14.Text = "班级成绩";
			this.menuItem14.Click += new System.EventHandler(this.menuItem14_Click);
			// 
			// MainFrm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(792, 545);
			this.IsMdiContainer = true;
			this.Menu = this.mainMenu1;
			this.Name = "MainFrm";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "学生与成绩";

		}
		#endregion

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

		private void menuItem4_Click(object sender, System.EventArgs e)
		{
			admin f1=new admin();
			f1.ShowDialog();
			if(MainFrm.lg==false)
				return;
			if(this.checkChildFrmExist("AddUsers")==true)
				return;
			AddUsers newFrm=new AddUsers();
			newFrm.MdiParent=this;
			newFrm.Show();
			
				
		
		}
		private bool checkChildFrmExist(string childFrmName)
		{
			foreach(Form childFrm in this.MdiChildren)
			{
				if(childFrm.Name==childFrmName)
				{
					if(childFrm.WindowState==FormWindowState.Minimized)
						childFrm.WindowState=FormWindowState.Maximized;
					childFrm.Activate();
					return true;
				}
			}
			return false;
		}

		private void menuItem8_Click(object sender, System.EventArgs e)
		{
			if(this.checkChildFrmExist("PersonalSearch")==true)
				return;
			PersonalSearch newFrm=new PersonalSearch();
			newFrm.MdiParent=this;
			newFrm.Show();
		}

		private void menuItem11_Click(object sender, System.EventArgs e)
		{
			if(this.checkChildFrmExist("GradeSearch")==true)
				return;
			GradeSearch newFrm=new GradeSearch();
			newFrm.MdiParent=this;
			newFrm.Show();
				
		}

		private void menuItem9_Click(object sender, System.EventArgs e)
		{
			if(this.checkChildFrmExist("Stu")==true)
				return;
			Stu newFrm=new Stu();
			newFrm.MdiParent=this;
			newFrm.Show();
		}

		private void menuItem13_Click(object sender, System.EventArgs e)
		{
			AddCourse f2=new AddCourse();
			f2.ShowDialog();
			if(MainFrm.lg==false)
				return;
			if(this.checkChildFrmExist("Course")==true)
				return;
			Course newFrm=new Course();
			newFrm.MdiParent=this;
			newFrm.Show();
		}

		private void menuItem14_Click(object sender, System.EventArgs e)
		{
			if(this.checkChildFrmExist("Grade")==true)
				return;
			Grade newFrm=new Grade();
			newFrm.MdiParent=this;
			newFrm.Show();
		}

		private void menuItem12_Click(object sender, System.EventArgs e)
		{
			ClassID f=new ClassID();
			f.ShowDialog();
			if(MainFrm.lg==false)
				return;
			if(this.checkChildFrmExist("ClassStu")==true)
				return;
			ClassStu newFrm=new ClassStu();
			newFrm.MdiParent=this;
			newFrm.Show();
		}

		private void menuItem10_Click(object sender, System.EventArgs e)
		{
			if(this.checkChildFrmExist("Stu2")==true)
				return;
			Stu2 newFrm=new Stu2();
			newFrm.MdiParent=this;
			newFrm.Show();
		}

		private void menuItem5_Click(object sender, System.EventArgs e)
		{
			if(this.checkChildFrmExist("Logon")==true)
				return;
			Logon newFrm=new Logon();
			newFrm.MdiParent=this;
			newFrm.Show();
		}
	}
}