form1.cs

用c#编写的一个学生信息管理系统

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

namespace student
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Label label3;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// 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 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.label1 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.label2 = new System.Windows.Forms.Label();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.label3 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(40, 120);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(88, 32);
			this.label1.TabIndex = 0;
			this.label1.Text = "用户名：";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(152, 120);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(136, 21);
			this.textBox1.TabIndex = 1;
			this.textBox1.Text = "";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(40, 160);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(88, 32);
			this.label2.TabIndex = 2;
			this.label2.Text = "密码：";
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(152, 168);
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = '＊';
			this.textBox2.Size = new System.Drawing.Size(136, 21);
			this.textBox2.TabIndex = 3;
			this.textBox2.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(112, 216);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(88, 32);
			this.button1.TabIndex = 4;
			this.button1.Text = "登录";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// label3
			// 
			this.label3.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(128)), ((System.Byte)(128)), ((System.Byte)(255)));
			this.label3.Font = new System.Drawing.Font("华文行楷", 24F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.ForeColor = System.Drawing.Color.Red;
			this.label3.Location = new System.Drawing.Point(56, 24);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(224, 72);
			this.label3.TabIndex = 5;
			this.label3.Text = "　欢迎登录　　学生管理系统";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(128)), ((System.Byte)(128)), ((System.Byte)(255)));
			this.ClientSize = new System.Drawing.Size(344, 274);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.label3,
																		  this.button1,
																		  this.textBox2,
																		  this.label2,
																		  this.textBox1,
																		  this.label1});
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			int i=0;
			string hostname=System.Net.Dns.GetHostName(); 
			string cnStr="Integrated Security=SSPI;Persist Security Info=False;password=;" 
				+"Initial Catalog=学生信息管理系统;Data Source='"+hostname+"'";
			SqlConnection cn=new SqlConnection(cnStr);
			cn.Open();
			string sqlStr="select * from denglu";
			SqlCommand cmd=new SqlCommand(sqlStr,cn);
			SqlDataReader dr=cmd.ExecuteReader();
			while(dr.Read())
			{
				string password1=dr["password"].ToString();
				string name1=dr["name"].ToString();
				if(password1.Trim()==textBox2.Text&&name1.Trim()==textBox1.Text)
				{ 					
					主页 f=new 主页();
					f.Show();
					i=1;					
				   
				}				
			}
			if(i==0)
			{
				MessageBox.Show("用户名或密码错误!");
			}
			dr.Close();
			cn.Close();	
		}
	}
}