deletebook.cs

本软件是图书管理系统软件。该软件用于提高图书馆图书管理水平及方便读者借阅图书馆书籍。由于图书馆所存书籍种类繁多、数量较大

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

namespace 图书馆管理系统
{
	/// <summary>
	/// DeleteBook 的摘要说明。
	/// </summary>
	public class DeleteBook : System.Windows.Forms.Form
	{
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public DeleteBook()
		{
			//
			// 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.groupBox1 = new System.Windows.Forms.GroupBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.label2);
			this.groupBox1.Controls.Add(this.label1);
			this.groupBox1.Controls.Add(this.textBox2);
			this.groupBox1.Controls.Add(this.textBox1);
			this.groupBox1.Location = new System.Drawing.Point(8, 40);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(248, 136);
			this.groupBox1.TabIndex = 0;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "删除旧书";
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(112, 80);
			this.textBox2.Name = "textBox2";
			this.textBox2.Size = new System.Drawing.Size(104, 21);
			this.textBox2.TabIndex = 3;
			this.textBox2.Text = "";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(112, 32);
			this.textBox1.Name = "textBox1";
			this.textBox1.TabIndex = 2;
			this.textBox1.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(272, 56);
			this.button1.Name = "button1";
			this.button1.TabIndex = 1;
			this.button1.Text = "删除";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(272, 104);
			this.button2.Name = "button2";
			this.button2.TabIndex = 2;
			this.button2.Text = "取消";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 32);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(80, 23);
			this.label1.TabIndex = 4;
			this.label1.Text = "序列号：";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 80);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(72, 23);
			this.label2.TabIndex = 5;
			this.label2.Text = "书名：";
			// 
			// DeleteBook
			// 
			this.AcceptButton = this.button1;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(360, 286);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.groupBox1);
			this.Name = "DeleteBook";
			this.Text = "DeleteBook";
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		private void button1_Click(object sender, System.EventArgs e)
		{
			if(textBox1.Text!="")
			{
				if(NoExists(textBox1.Text))
				{
					SqlDataAdapter myDataAdapter = new SqlDataAdapter();
					string strConn="INTEGRATED SECURITY=TRUE;Initial Catalog=Bookmanagement;Data Source=127.0.0.1";
					SqlConnection myConnection=new SqlConnection(strConn);
					myConnection.Open();
					string cmdString="delete from Books where 序列号='"+textBox1.Text+"'";
					SqlCommand cmm=new SqlCommand(cmdString,myConnection);
					cmm.ExecuteNonQuery();
					
					
					cmdString="delete from Bookdetails where 书名='"+textBox2.Text+"'";
					cmm=new SqlCommand(cmdString,myConnection);
					cmm.ExecuteNonQuery();
					MessageBox.Show("删除成功！");
				}
				else
				{
					MessageBox.Show("这本书不存在！");
				}
			}
			else
			{
				MessageBox.Show("序列号不能为空！");
			}
	
		
		}
		private bool NoExists(string str)
		{
			bool result;
			string strConn="INTEGRATED SECURITY=TRUE;Initial Catalog=Bookmanagement;Data Source=127.0.0.1";
			SqlConnection myConnection=new SqlConnection(strConn);
			myConnection.Open();
			string cmdString="select * from books where books.序列号='"+str+"'";
			SqlCommand cmd=new SqlCommand(cmdString,myConnection);
			SqlDataReader reader=cmd.ExecuteReader();
			if(reader.Read())
			{
				result=true;
			}
			else
			{
				result=false;
			}
			reader.Close();
			myConnection.Close();
			return result;
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}

		
	}
}