student.cs

学生信息管理系统： 采用C#编写

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

namespace Students
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Student : System.Windows.Forms.Form
	{
		private CrystalDecisions.Windows.Forms.CrystalReportViewer crystalReportViewer1;
		private System.Windows.Forms.ComboBox comboBox1;
		private string select;
		private System.Windows.Forms.Label label1;
		private string  connectstr = "data source=WJD;Initial Catalog=students;integrated security=SSPI;";

		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;
        
		public Student()
		{
			//
			// 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
			//
			//定义Dataset1类的对象实例myset
			Dataset1 myset = new Dataset1();		
			SqlConnection sqlcnn = new SqlConnection( connectstr );
            
			string sqlstr = "select * from students";
			SqlDataAdapter myadapter = new SqlDataAdapter(sqlstr,sqlcnn);
			//将从数据库的students表中选出的所有数据放置在myset的名为students表中
			myadapter.Fill(myset,"students");

			sqlstr = "select * from Department";
			SqlDataAdapter myadapter1 = new SqlDataAdapter(sqlstr,sqlcnn);
			//将从数据库的Department表中选出的所有数据放置在myset的名为Department表中
			myadapter1.Fill(myset,"Department");
		
			//设置程序运行时默认显示的报表
			MyRprt1 myrpt = new MyRprt1();
			//设置将水晶报表的数据源
			myrpt.SetDataSource(myset);
			//设置报表查看器中显示的报表
			crystalReportViewer1.ReportSource = myrpt;
		}

		/// <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 Form Designer generated code
		/// <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.crystalReportViewer1 = new CrystalDecisions.Windows.Forms.CrystalReportViewer();
			this.comboBox1 = new System.Windows.Forms.ComboBox();
			this.label1 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// crystalReportViewer1
			// 
			this.crystalReportViewer1.ActiveViewIndex = -1;
			this.crystalReportViewer1.BackColor = System.Drawing.Color.White;
			this.crystalReportViewer1.Location = new System.Drawing.Point(0, 48);
			this.crystalReportViewer1.Name = "crystalReportViewer1";
			this.crystalReportViewer1.ReportSource = null;
			this.crystalReportViewer1.Size = new System.Drawing.Size(816, 640);
			this.crystalReportViewer1.TabIndex = 0;
			// 
			// comboBox1
			// 
			this.comboBox1.Items.AddRange(new object[] {
														   "学生基本信息表",
														   "学院基本信息表",
														   "学生人数对比1",
														   "学生平均年龄对比",
														   "学生人数对比2"});
			this.comboBox1.Location = new System.Drawing.Point(72, 8);
			this.comboBox1.Name = "comboBox1";
			this.comboBox1.Size = new System.Drawing.Size(121, 20);
			this.comboBox1.TabIndex = 4;
			this.comboBox1.Text = "请选择";
			this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);
			// 
			// label1
			// 
			this.label1.BackColor = System.Drawing.Color.Transparent;
			this.label1.ForeColor = System.Drawing.SystemColors.WindowFrame;
			this.label1.Location = new System.Drawing.Point(8, 8);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(64, 23);
			this.label1.TabIndex = 5;
			this.label1.Text = "切换报表";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			// 
			// Student
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(816, 694);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.comboBox1);
			this.Controls.Add(this.crystalReportViewer1);
			this.Name = "Student";
			this.Text = "学生信息报表系统";
			this.Load += new System.EventHandler(this.Student_Load);
			this.ResumeLayout(false);

		}
		#endregion





		private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			//获取从comboBox1中选取的字符串
			select = comboBox1.SelectedText.ToString();

			//定义Dataset1类的对象实例myset
			Dataset1 myset = new Dataset1();		
			SqlConnection sqlcnn = new SqlConnection( connectstr );

			string sqlstr = "select * from students";
			SqlDataAdapter myadapter = new SqlDataAdapter(sqlstr,sqlcnn);
			//将从数据库的students表中选出的所有数据放置在myset的名为students表中
			myadapter.Fill(myset,"students");

			sqlstr = "select * from Department";
			SqlDataAdapter myadapter1 = new SqlDataAdapter(sqlstr,sqlcnn);
			//将从数据库的Department表中选出的所有数据放置在myset的名为Department表中
			myadapter1.Fill(myset,"Department");

			//根据选择到的不同字符串对报表的数据进行绑定
			switch ( Int32.Parse(comboBox1.SelectedIndex.ToString()))
			{
					//选择了学生基本信息表	
				case 0 :
				{
					MyRprt1 myrpt = new MyRprt1();
					myrpt.SetDataSource(myset);
					crystalReportViewer1.ReportSource = myrpt;	
					break;
				}
					//选择了学院基本信息表	
				case 1 :
				{
					MyRprt2 myrpt = new MyRprt2();
					myrpt.SetDataSource(myset);
					crystalReportViewer1.ReportSource = myrpt;			
					break;
				}
					//选择了学生人数对比1
				case 2 :
				{
					MyRprt3 myrpt = new MyRprt3();
					myrpt.SetDataSource(myset);
					crystalReportViewer1.ReportSource = myrpt;	
					break;
				}
					//选择了学生平均年龄对比
				case 3 :
				{
					MyRprt4 myrpt = new MyRprt4();
					myrpt.SetDataSource(myset);
					crystalReportViewer1.ReportSource = myrpt;	
					break;
				}
					//选择了学生人数对比2
				case 4 :
				{
					MyRprt5 myrpt = new MyRprt5();
					myrpt.SetDataSource(myset);
					crystalReportViewer1.ReportSource = myrpt;	
					break;
				}
			}
			  
		}

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