modifypassword.cs

C#编写的学籍管理系统

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Data.OleDb;

namespace WindowsApplication1
{
	/// <summary>
	/// xgmm 的摘要说明。
	/// </summary>
	public class ModifyPassword : System.Windows.Forms.Form
	{
		private System.Windows.Forms.TextBox textBox3;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox textBox4;
		private System.Windows.Forms.Label label4;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		public OleDbConnection cn=new OleDbConnection("Data Source=xsxxdb.mdb;Jet OLEDB:Engine Type=5;Provider=Microsoft.Jet.OLEDB.4.0;");
		[DllImport("User32.dll")]
		public static extern int MessageBox(int h,string m,string c,int type);
		private System.ComponentModel.Container components = null;

		public ModifyPassword()
		{
			//
			// 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.textBox3 = new System.Windows.Forms.TextBox();
			this.label3 = new System.Windows.Forms.Label();
			this.button2 = new System.Windows.Forms.Button();
			this.button1 = new System.Windows.Forms.Button();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.label2 = new System.Windows.Forms.Label();
			this.label1 = new System.Windows.Forms.Label();
			this.textBox4 = new System.Windows.Forms.TextBox();
			this.label4 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// textBox3
			// 
			this.textBox3.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox3.ForeColor = System.Drawing.SystemColors.ControlText;
			this.textBox3.Location = new System.Drawing.Point(128, 144);
			this.textBox3.Name = "textBox3";
			this.textBox3.PasswordChar = '*';
			this.textBox3.Size = new System.Drawing.Size(160, 25);
			this.textBox3.TabIndex = 21;
			this.textBox3.Text = "";
			// 
			// label3
			// 
			this.label3.AutoSize = true;
			this.label3.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.ForeColor = System.Drawing.SystemColors.ControlText;
			this.label3.Location = new System.Drawing.Point(33, 144);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(67, 21);
			this.label3.TabIndex = 20;
			this.label3.Text = "密码确认";
			// 
			// button2
			// 
			this.button2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button2.ForeColor = System.Drawing.SystemColors.ControlText;
			this.button2.Location = new System.Drawing.Point(203, 195);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(100, 30);
			this.button2.TabIndex = 19;
			this.button2.Text = "退出";
			// 
			// button1
			// 
			this.button1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button1.ForeColor = System.Drawing.SystemColors.ControlText;
			this.button1.Location = new System.Drawing.Point(21, 195);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(100, 30);
			this.button1.TabIndex = 18;
			this.button1.Text = "确定";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// textBox2
			// 
			this.textBox2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox2.ForeColor = System.Drawing.SystemColors.ControlText;
			this.textBox2.Location = new System.Drawing.Point(128, 64);
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = '*';
			this.textBox2.Size = new System.Drawing.Size(160, 25);
			this.textBox2.TabIndex = 17;
			this.textBox2.Text = "";
			// 
			// textBox1
			// 
			this.textBox1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox1.ForeColor = System.Drawing.SystemColors.ControlText;
			this.textBox1.Location = new System.Drawing.Point(128, 21);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(160, 25);
			this.textBox1.TabIndex = 16;
			this.textBox1.Text = "";
			// 
			// label2
			// 
			this.label2.AutoSize = true;
			this.label2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.ForeColor = System.Drawing.SystemColors.ControlText;
			this.label2.Location = new System.Drawing.Point(32, 64);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(67, 21);
			this.label2.TabIndex = 15;
			this.label2.Text = "密    码";
			// 
			// label1
			// 
			this.label1.AutoSize = true;
			this.label1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.ForeColor = System.Drawing.SystemColors.ControlText;
			this.label1.Location = new System.Drawing.Point(33, 24);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(67, 21);
			this.label1.TabIndex = 14;
			this.label1.Text = "用户名称";
			// 
			// textBox4
			// 
			this.textBox4.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox4.ForeColor = System.Drawing.SystemColors.ControlText;
			this.textBox4.Location = new System.Drawing.Point(128, 104);
			this.textBox4.Name = "textBox4";
			this.textBox4.PasswordChar = '*';
			this.textBox4.Size = new System.Drawing.Size(160, 25);
			this.textBox4.TabIndex = 22;
			this.textBox4.Text = "";
			// 
			// label4
			// 
			this.label4.AutoSize = true;
			this.label4.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label4.ForeColor = System.Drawing.SystemColors.ControlText;
			this.label4.Location = new System.Drawing.Point(32, 104);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(67, 21);
			this.label4.TabIndex = 23;
			this.label4.Text = "新 密 码";
			// 
			// ModifyPassword
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(8, 18);
			this.ClientSize = new System.Drawing.Size(330, 242);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.textBox4);
			this.Controls.Add(this.textBox3);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.textBox2);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Name = "ModifyPassword";
			this.Text = "修改密码";
			this.ResumeLayout(false);

		}
		#endregion

		private void button1_Click(object sender, System.EventArgs e)
		{
			if (textBox1.Text.Trim()=="" || textBox2.Text.Trim()=="" ||textBox3.Text.Trim()=="" ||textBox4.Text.Trim()=="")
				MessageBox(0,"请填写完整信息","提示",0);
			else
			{
				cn.Open();
				OleDbCommand cmd=new OleDbCommand("",cn);
				string sql="select * from userinfo where name='"+textBox1.Text.Trim()+"' and passwd='"+textBox2.Text.Trim()+"'";
				cmd.CommandText=sql;
				//OleDbDataReader dr;
				//dr=cmd.ExecuteReader();
				if (null!=cmd.ExecuteScalar())
				{
					if (textBox4.Text.Trim()!=textBox3.Text.Trim())
						MessageBox(0,"两次输入密码不一致","提示",0);
					else
					{
					
						sql="update UserInfo set Passwd='"+textBox3.Text.Trim()+"' where Name='"+textBox1.Text.Trim()+"'";
						cmd.CommandText=sql;
						//cn.Open();
						cmd.ExecuteNonQuery();
						MessageBox(0,"密码修改成功","提示",0);
						//cn.Close();
					}
				}
				else
				  MessageBox(0,"用户名或密码错误","提示",0);
				cn.Close();

			}
		}
	}
}