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

namespace Library
{
	/// <summary>
	/// 借書證解掛 的摘要說明。
	/// </summary>
	public class LiftRegisterLoss : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label1;
		/// <summary>
		/// 必需的設計器變量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		private SqlCommand cmd;
		//private SqlDataReader dr;

		public LiftRegisterLoss()
		{
			//
			// Windows 窗體設計器支持所必需的
			//
			InitializeComponent();
		}

		/// <summary>
		/// 清理所有正在使用的資源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗體設計器生成的代碼
		/// <summary>
		/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
		/// 此方法的內容。
		/// </summary>
		private void InitializeComponent()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.label2 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.label1 = new System.Windows.Forms.Label();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.button1.Location = new System.Drawing.Point(232, 96);
			this.button1.Name = "button1";
			this.button1.TabIndex = 1;
			this.button1.Text = "關閉";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.button2.Location = new System.Drawing.Point(136, 96);
			this.button2.Name = "button2";
			this.button2.TabIndex = 2;
			this.button2.Text = "解掛";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.label2);
			this.groupBox1.Controls.Add(this.textBox1);
			this.groupBox1.Controls.Add(this.label1);
			this.groupBox1.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.groupBox1.Location = new System.Drawing.Point(16, 8);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(288, 72);
			this.groupBox1.TabIndex = 3;
			this.groupBox1.TabStop = false;
			// 
			// label2
			// 
			this.label2.AutoSize = true;
			this.label2.Font = new System.Drawing.Font("宋體", 7.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.ForeColor = System.Drawing.Color.Red;
			this.label2.Location = new System.Drawing.Point(232, 32);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(40, 15);
			this.label2.TabIndex = 4;
			this.label2.Text = "<Enter>";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(64, 30);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(168, 21);
			this.textBox1.TabIndex = 3;
			this.textBox1.Text = "";
			this.textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox1_KeyDown);
			// 
			// label1
			// 
			this.label1.AutoSize = true;
			this.label1.Location = new System.Drawing.Point(16, 32);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(42, 17);
			this.label1.TabIndex = 0;
			this.label1.Text = "借書證";
			// 
			// LiftRegisterLoss
			// 
			this.AcceptButton = this.button2;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(320, 135);
			this.ControlBox = false;
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
			this.Name = "LiftRegisterLoss";
			this.ShowInTaskbar = false;
			this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "借書證解掛";
			this.Load += new System.EventHandler(this.LiftRegisterLoss_Load);
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion
		/// <summary>
		/// 初始化
		/// </summary>
		private void initializeScreen()
		{
			textBox1.Text = "";
			textBox1.Focus();
		}
		/// <summary>
		/// 關閉
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void button1_Click(object sender, System.EventArgs e)
		{
			Global.sbpGlobal.Text = "就緒";
			this.Close();
		}
		/// <summary>
		/// 窗體加載代碼
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void LiftRegisterLoss_Load(object sender, System.EventArgs e)
		{
			cmd = Global.conn.CreateCommand();
			initializeScreen();
		}
		/// <summary>
		/// 借書證號輸入完成后，按回車鍵顯示該讀者證信息
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void textBox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
		{
			if(e.KeyCode == Keys.Enter)
			{
				ShowInfomation();
			}
		}
		/// <summary>
		/// 顯示讀者證信息
		/// </summary>
		private void ShowInfomation()
		{
			//string str = @"select * from 讀者信息 where 借書證號='" + this.textBox1.Text.Trim() + "'";

		}
		/// <summary>
		/// 解掛
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void button2_Click(object sender, System.EventArgs e)
		{
			string sql = "select * from 借書證 where 借書證號='" + this.textBox1.Text.Trim() + "' and 借書證狀態=1";
			cmd.CommandText = sql;
			SqlDataReader dr = cmd.ExecuteReader();
			dr.Read();
			if(!dr.HasRows)
			{
				MessageBox.Show("當前掛失的證件記錄中不存此借書證記錄！因此您不能解掛此借書證，它可能未被進行掛失處理或已經解掛！");
				return;
			}
			string sqlstr = "update 借書證 set 借書證狀態=0 where 借書證號='" + this.textBox1.Text.Trim() + "'";
			cmd.CommandText = sqlstr;
			try
			{
				cmd.ExecuteNonQuery();
				MessageBox.Show("已經成功解掛此借書證！");
				this.Close();
			}
			catch(Exception ex)
			{
				MessageBox.Show("解掛借書證時發生未知錯誤！錯誤信息：" + ex.Message);
				return;
			}
		}
	}
}