mmxg.cs

这是本人学习语言来第一次写的程序

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

namespace 图书馆信息管理系统
{
	/// <summary>
	/// mmxg 的摘要说明。
	/// </summary>
	public class mmxg : 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.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.TextBox textBox3;
		private System.Windows.Forms.TextBox textBox4;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Data.OleDb.OleDbDataAdapter oleDbDataAdapter1;
		private System.Data.OleDb.OleDbCommand oleDbSelectCommand1;
		private System.Data.OleDb.OleDbCommand oleDbInsertCommand1;
		private System.Data.OleDb.OleDbCommand oleDbUpdateCommand1;
		private System.Data.OleDb.OleDbCommand oleDbDeleteCommand1;
		private System.Data.OleDb.OleDbConnection oleDbConnection1;
		private 图书馆信息管理系统.DataSet2 dataSet21;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public mmxg()
		{
			//
			// 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.label1 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.textBox3 = new System.Windows.Forms.TextBox();
			this.textBox4 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.oleDbDataAdapter1 = new System.Data.OleDb.OleDbDataAdapter();
			this.oleDbSelectCommand1 = new System.Data.OleDb.OleDbCommand();
			this.oleDbInsertCommand1 = new System.Data.OleDb.OleDbCommand();
			this.oleDbUpdateCommand1 = new System.Data.OleDb.OleDbCommand();
			this.oleDbDeleteCommand1 = new System.Data.OleDb.OleDbCommand();
			this.oleDbConnection1 = new System.Data.OleDb.OleDbConnection();
			this.dataSet21 = new 图书馆信息管理系统.DataSet2();
			((System.ComponentModel.ISupportInitialize)(this.dataSet21)).BeginInit();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.Location = new System.Drawing.Point(45, 32);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(72, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "用户名：";
			// 
			// textBox1
			// 
			this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.textBox1.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox1.Location = new System.Drawing.Point(165, 24);
			this.textBox1.MaxLength = 20;
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(208, 26);
			this.textBox1.TabIndex = 0;
			this.textBox1.Text = "";
			this.textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.button1_KeyDown);
			this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
			// 
			// label2
			// 
			this.label2.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.Location = new System.Drawing.Point(45, 74);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(88, 23);
			this.label2.TabIndex = 0;
			this.label2.Text = "当前密码：";
			// 
			// label3
			// 
			this.label3.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.Location = new System.Drawing.Point(45, 116);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(88, 23);
			this.label3.TabIndex = 0;
			this.label3.Text = "新的密码：";
			// 
			// label4
			// 
			this.label4.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label4.Location = new System.Drawing.Point(45, 158);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(88, 23);
			this.label4.TabIndex = 0;
			this.label4.Text = "确认密码：";
			// 
			// textBox2
			// 
			this.textBox2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.textBox2.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox2.Location = new System.Drawing.Point(165, 66);
			this.textBox2.MaxLength = 20;
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = '*';
			this.textBox2.Size = new System.Drawing.Size(208, 26);
			this.textBox2.TabIndex = 1;
			this.textBox2.Text = "";
			this.textBox2.KeyDown += new System.Windows.Forms.KeyEventHandler(this.button1_KeyDown);
			this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
			// 
			// textBox3
			// 
			this.textBox3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.textBox3.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox3.Location = new System.Drawing.Point(165, 108);
			this.textBox3.MaxLength = 20;
			this.textBox3.Name = "textBox3";
			this.textBox3.PasswordChar = '*';
			this.textBox3.Size = new System.Drawing.Size(208, 26);
			this.textBox3.TabIndex = 2;
			this.textBox3.Text = "";
			this.textBox3.KeyDown += new System.Windows.Forms.KeyEventHandler(this.button1_KeyDown);
			this.textBox3.TextChanged += new System.EventHandler(this.textBox3_TextChanged);
			// 
			// textBox4
			// 
			this.textBox4.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.textBox4.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox4.Location = new System.Drawing.Point(165, 150);
			this.textBox4.MaxLength = 20;
			this.textBox4.Name = "textBox4";
			this.textBox4.PasswordChar = '*';
			this.textBox4.Size = new System.Drawing.Size(208, 26);
			this.textBox4.TabIndex = 3;
			this.textBox4.Text = "";
			this.textBox4.KeyDown += new System.Windows.Forms.KeyEventHandler(this.button1_KeyDown);
			this.textBox4.TextChanged += new System.EventHandler(this.textBox4_TextChanged);
			//