usercontrol1.cs

图书管理系统,.net2003+sql2000,分为三个模块,用户端,操作员端,系统管理员端.基本上是用自定义控件dll来完成,内含完整sql语句,包括存储过程.

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

namespace 登录Dll
{
	/// <summary>
	/// UserControl1 的摘要说明。
	/// </summary>
	public class UserControl1 : System.Windows.Forms.UserControl
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		public System.Windows.Forms.TextBox textBox1;
		public System.Windows.Forms.TextBox textBox2;
		public string table;
		private System.Windows.Forms.Label label3;
		public string success;////////////////////////////////////////////判断登录成功
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public UserControl1()
		{
			// 该调用是 Windows.Forms 窗体设计器所必需的。
			InitializeComponent();

			// TODO: 在 InitComponent 调用后添加任何初始化

		}
		public UserControl1(string table)
		{
			// 该调用是 Windows.Forms 窗体设计器所必需的。
			InitializeComponent();

			// TODO: 在 InitComponent 调用后添加任何初始化
			this.table=table;
		}


		/// <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 组件设计器生成的代码
		/// <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.label2 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.label3 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.Location = new System.Drawing.Point(48, 56);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(40, 17);
			this.label1.TabIndex = 0;
			this.label1.Text = "帐号";
			// 
			// label2
			// 
			this.label2.Font = new System.Drawing.Font("宋体", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.Location = new System.Drawing.Point(48, 88);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(40, 16);
			this.label2.TabIndex = 1;
			this.label2.Text = "密码";
			// 
			// textBox1
			// 
			this.textBox1.Font = new System.Drawing.Font("宋体", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox1.Location = new System.Drawing.Point(112, 56);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(96, 23);
			this.textBox1.TabIndex = 2;
			this.textBox1.Text = "";
			// 
			// textBox2
			// 
			this.textBox2.Font = new System.Drawing.Font("宋体", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox2.Location = new System.Drawing.Point(112, 88);
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = '*';
			this.textBox2.Size = new System.Drawing.Size(96, 23);
			this.textBox2.TabIndex = 3;
			this.textBox2.Text = "";
			// 
			// label3
			// 
			this.label3.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.Location = new System.Drawing.Point(56, 16);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(160, 16);
			this.label3.TabIndex = 5;
			this.label3.Text = "欢迎进入电子图书馆";
			// 
			// UserControl1
			// 
			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.Name = "UserControl1";
			this.Size = new System.Drawing.Size(296, 160);
			this.ResumeLayout(false);

		}
		#endregion

		public void log()//登录
		{
			try
			{
				公共数据dll.Store.sqlStr="select count(*) from "+table+" where 证件号='"+textBox1.Text+"' and 密码='"+textBox2.Text+"'";
				MessageBox.Show(公共数据dll.Store.sqlStr);
				公共数据dll.Store.cn=new SqlConnection(公共数据dll.Store.cnStr);
				公共数据dll.Store.cn.Open();
				公共数据dll.Store.cmd=new SqlCommand(公共数据dll.Store.sqlStr,公共数据dll.Store.cn);
				公共数据dll.Store.cmd.ExecuteNonQuery();
				object n=公共数据dll.Store.cmd.ExecuteScalar();
				if(int.Parse(n.ToString())==1)
				{
					this.success="success";
				}				
				else 
				{
					MessageBox.Show("失败!","Msg",MessageBoxButtons.OK,MessageBoxIcon.Information);
				    this.success="fail";
					公共数据dll.Store.cn.Close();
				}
			}
			catch
			{
				MessageBox.Show("连接出错!","Msg",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}

		}

		
	}
}