deletef.cs

图书管理系统！！C#+olc 大小是100多k

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.OleDb;
using System.Data.Common;
namespace bookstore
{
	/// <summary>
	/// DeleteF 的摘要说明。
	/// </summary>
	public class DeleteF : System.Windows.Forms.Form
	{
		private System.Windows.Forms.TabControl tabControl1;
		private System.Windows.Forms.TabPage tabPage1;
		private System.Windows.Forms.TabPage tabPage2;
		private System.Windows.Forms.TabPage tabPage3;
		private System.Windows.Forms.TabPage tabPage4;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Button button3;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Button button4;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.TextBox textBox3;
		private System.Windows.Forms.TextBox textBox4;
		private System.Windows.Forms.Button button5;
		private System.Windows.Forms.Button button6;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.TextBox textBox5;
		private System.Windows.Forms.Button button7;
		private System.Windows.Forms.Button button8;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;
		util1 util=new util1();
		SqlBean sq=new SqlBean();

		public DeleteF()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();
			textBox1.Clear();
			textBox2.Clear();
			textBox3.Clear();
			textBox4.Clear();
			textBox5.Clear();
			//
			// 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.tabControl1 = new System.Windows.Forms.TabControl();
			this.tabPage1 = new System.Windows.Forms.TabPage();
			this.button2 = new System.Windows.Forms.Button();
			this.button1 = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.tabPage2 = new System.Windows.Forms.TabPage();
			this.button4 = new System.Windows.Forms.Button();
			this.label2 = new System.Windows.Forms.Label();
			this.button3 = new System.Windows.Forms.Button();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.tabPage3 = new System.Windows.Forms.TabPage();
			this.button6 = new System.Windows.Forms.Button();
			this.button5 = new System.Windows.Forms.Button();
			this.textBox4 = new System.Windows.Forms.TextBox();
			this.textBox3 = new System.Windows.Forms.TextBox();
			this.label4 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.tabPage4 = new System.Windows.Forms.TabPage();
			this.button8 = new System.Windows.Forms.Button();
			this.button7 = new System.Windows.Forms.Button();
			this.textBox5 = new System.Windows.Forms.TextBox();
			this.label5 = new System.Windows.Forms.Label();
			this.tabControl1.SuspendLayout();
			this.tabPage1.SuspendLayout();
			this.tabPage2.SuspendLayout();
			this.tabPage3.SuspendLayout();
			this.tabPage4.SuspendLayout();
			this.SuspendLayout();
			// 
			// tabControl1
			// 
			this.tabControl1.Controls.Add(this.tabPage1);
			this.tabControl1.Controls.Add(this.tabPage2);
			this.tabControl1.Controls.Add(this.tabPage3);
			this.tabControl1.Controls.Add(this.tabPage4);
			this.tabControl1.Location = new System.Drawing.Point(8, 8);
			this.tabControl1.Name = "tabControl1";
			this.tabControl1.SelectedIndex = 0;
			this.tabControl1.Size = new System.Drawing.Size(272, 248);
			this.tabControl1.TabIndex = 0;
			// 
			// tabPage1
			// 
			this.tabPage1.Controls.Add(this.button2);
			this.tabPage1.Controls.Add(this.button1);
			this.tabPage1.Controls.Add(this.label1);
			this.tabPage1.Controls.Add(this.textBox1);
			this.tabPage1.Location = new System.Drawing.Point(4, 21);
			this.tabPage1.Name = "tabPage1";
			this.tabPage1.Size = new System.Drawing.Size(264, 223);
			this.tabPage1.TabIndex = 0;
			this.tabPage1.Text = "删除读者";
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(152, 144);
			this.button2.Name = "button2";
			this.button2.TabIndex = 3;
			this.button2.Text = "取消";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(24, 144);
			this.button1.Name = "button1";
			this.button1.TabIndex = 2;
			this.button1.Text = "删除";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 48);
			this.label1.Name = "label1";
			this.label1.TabIndex = 1;
			this.label1.Text = "读者编号：";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(136, 48);
			this.textBox1.Name = "textBox1";
			this.textBox1.TabIndex = 0;
			this.textBox1.Text = "textBox1";
			this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
			// 
			// tabPage2
			// 
			this.tabPage2.Controls.Add(this.button4);
			this.tabPage2.Controls.Add(this.label2);
			this.tabPage2.Controls.Add(this.button3);
			this.tabPage2.Controls.Add(this.textBox2);
			this.tabPage2.Location = new System.Drawing.Point(4, 21);
			this.tabPage2.Name = "tabPage2";
			this.tabPage2.Size = new System.Drawing.Size(264, 223);
			this.tabPage2.TabIndex = 1;
			this.tabPage2.Text = "删除图书";
			// 
			// button4
			// 
			this.button4.Location = new System.Drawing.Point(152, 144);
			this.button4.Name = "button4";
			this.button4.TabIndex = 3;
			this.button4.Text = "取消";
			this.button4.Click += new System.EventHandler(this.button4_Click);
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(24, 56);
			this.label2.Name = "label2";
			this.label2.TabIndex = 2;
			this.label2.Text = "图书编号：";
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(32, 144);
			this.button3.Name = "button3";
			this.button3.TabIndex = 1;
			this.button3.Text = "删除";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(144, 56);
			this.textBox2.Name = "textBox2";
			this.textBox2.TabIndex = 0;
			this.textBox2.Text = "textBox2";
			// 
			// tabPage3
			// 
			this.tabPage3.Controls.Add(this.button6);
			this.tabPage3.Controls.Add(this.button5);
			this.tabPage3.Controls.Add(this.textBox4);
			this.tabPage3.Controls.Add(this.textBox3);
			this.tabPage3.Controls.Add(this.label4);
			this.tabPage3.Controls.Add(this.label3);
			this.tabPage3.Location = new System.Drawing.Point(4, 21);
			this.tabPage3.Name = "tabPage3";
			this.tabPage3.Size = new System.Drawing.Size(264, 223);
			this.tabPage3.TabIndex = 2;
			this.tabPage3.Text = "还书";
			// 
			// button6
			// 
			this.button6.Location = new System.Drawing.Point(160, 168);
			this.button6.Name = "button6";
			this.button6.TabIndex = 5;
			this.button6.Text = "取消";
			// 
			// button5
			// 
			this.button5.Location = new System.Drawing.Point(32, 168);
			this.button5.Name = "button5";
			this.button5.TabIndex = 4;
			this.button5.Text = "还书";
			this.button5.Click += new System.EventHandler(this.button5_Click);
			// 
			// textBox4
			// 
			this.textBox4.Location = new System.Drawing.Point(144, 96);
			this.textBox4.Name = "textBox4";
			this.textBox4.TabIndex = 3;
			this.textBox4.Text = "textBox4";
			// 
			// textBox3
			// 
			this.textBox3.Location = new System.Drawing.Point(144, 40);
			this.textBox3.Name = "textBox3";
			this.textBox3.TabIndex = 2;
			this.textBox3.Text = "textBox3";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(24, 96);
			this.label4.Name = "label4";
			this.label4.TabIndex = 1;
			this.label4.Text = "图书编号：";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(24, 40);
			this.label3.Name = "label3";
			this.label3.TabIndex = 0;
			this.label3.Text = "读者编号：";
			// 
			// tabPage4
			// 
			this.tabPage4.Controls.Add(this.button8);
			this.tabPage4.Controls.Add(this.button7);
			this.tabPage4.Controls.Add(this.textBox5);
			this.tabPage4.Controls.Add(this.label5);
			this.tabPage4.Location = new System.Drawing.Point(4, 21);
			this.tabPage4.Name = "tabPage4";
			this.tabPage4.Size = new System.Drawing.Size(264, 223);
			this.tabPage4.TabIndex = 3;
			this.tabPage4.Text = "删除读者类型";
			// 
			// button8
			// 
			this.button8.Location = new System.Drawing.Point(152, 144);
			this.button8.Name = "button8";
			this.button8.TabIndex = 3;
			this.button8.Text = "取消";
			this.button8.Click += new System.EventHandler(this.button8_Click);
			// 
			// button7
			// 
			this.button7.Location = new System.Drawing.Point(24, 144);
			this.button7.Name = "button7";
			this.button7.TabIndex = 2;
			this.button7.Text = "删除";
			this.button7.Click += new System.EventHandler(this.button7_Click);
			// 
			// textBox5
			// 
			this.textBox5.Location = new System.Drawing.Point(136, 56);
			this.textBox5.Name = "textBox5";
			this.textBox5.TabIndex = 1;
			this.textBox5.Text = "textBox5";
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(16, 56);
			this.label5.Name = "label5";
			this.label5.TabIndex = 0;
			this.label5.Text = "类型编号：";
			// 
			// DeleteF
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Controls.Add(this.tabControl1);
			this.Name = "DeleteF";
			this.Text = "DeleteF";
			this.tabControl1.ResumeLayout(false);
			this.tabPage1.ResumeLayout(false);
			this.tabPage2.ResumeLayout(false);
			this.tabPage3.ResumeLayout(false);
			this.tabPage4.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		private void textBox1_TextChanged(object sender, System.EventArgs e)
		{
		
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			string rid=textBox1.Text;
			string sql="select * from Reader where Rid='"+rid+"'";
			if(util.isExist(sql))
			{
				string sql11="select * from GetBInfo where Rid='"+rid+"'";
				if(!util.isExist(sql11))
				{
					string sql1="delete from Reader where Rid='"+rid+"'";
					int m=sq.Update(sql1);
					if(m==0)
					{
						MessageBox.Show("发生错误，删除未成功！！");
					}
					else
					{
						MessageBox.Show("ok！！删除成功！！");
					}
				}
				else{
				MessageBox.Show("此用户正在借书当中，要想删除，请让他先还书！！");
				}
			}
			else
			{
				MessageBox.Show("数据库里没有该读者，无需删除！！");
			}
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			textBox1.Clear();
		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			string bid=textBox2.Text;
			string sql="select * from Book where Bid='"+bid+"'";
			if(util.isExist(sql))
			{ 
				string sql11="select * from GetBInfo where Bid='"+bid+"'";
				if(!util.isExist(sql11))
				{
					string sql1="delete from Book where Bid='"+bid+"'";
					int m=sq.Update(sql1);
					if(m==0)
					{
						MessageBox.Show("发生错误，删除未成功！！");
					}
					else
					{
						MessageBox.Show("ok！！删除成功！！");
					}
				}
				else{
				MessageBox.Show("这类书还有部分已借出，要想删除，请让所有用户先还！！");
				}
			}
			else{
			MessageBox.Show("数据库里没有该图书，无需删除！！");
			}
		}

		private void button4_Click(object sender, System.EventArgs e)
		{
			textBox2.Clear();
		}

		private void button5_Click(object sender, System.EventArgs e)
		{
			string rid=textBox3.Text;
			string bid=textBox4.Text;
			//Book book=new Book();
			util.setBook(rid,bid);
			 
		}

		private void button8_Click(object sender, System.EventArgs e)
		{
			textBox5.Clear();
		}

		private void button7_Click(object sender, System.EventArgs e)
		{
			string tid=textBox5.Text;
			string sql="select * from ReaderType where Typeid='"+tid+"'";
			if(util.isExist(sql))
            {
				string sql11="select * from Reader where Rtypeno='"+tid+"'";
				if(!util.isExist(sql11))
				{
					string sql1="delete from ReaderType where Typeid='"+tid+"'";
					int m=sq.Update(sql1);
					if(m==0)
					{
						MessageBox.Show("发生错误，删除未成功！！");
					}
					else
					{
						MessageBox.Show("ok！！删除成功！！");
					}
				}
				else{
				MessageBox.Show("目前还有读者是属于该类型，要想删除，先把属于该类型的读者更新！！");
				}
			}
			else
			{
				MessageBox.Show("数据库里没有该读者类型，无需删除！！");
			}
		}
	}
}