删除用户.cs

管理学院机房计费系统,VISUAL STUDIO .NET 2003 c# 语言实现,SQL SERVER 2000数据库. 现运行正常.

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

namespace 机房计费系统
{
	/// <summary>
	/// Form2 的摘要说明。
	/// </summary>
	public class frmDeleteUser : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Data.SqlClient.SqlConnection sqlConnection1;
		private String sql;
		private int numAff;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public frmDeleteUser()
		{
			//
			// 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.label1 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.Location = new System.Drawing.Point(24, 48);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(40, 24);
			this.label1.TabIndex = 0;
			this.label1.Text = "条码";
			this.label1.TextAlign = System.Drawing.ContentAlignment.TopRight;
			// 
			// textBox1
			// 
			this.textBox1.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox1.Location = new System.Drawing.Point(88, 40);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(304, 26);
			this.textBox1.TabIndex = 1;
			this.textBox1.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(112, 120);
			this.button1.Name = "button1";
			this.button1.TabIndex = 2;
			this.button1.Text = "删除";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(256, 120);
			this.button2.Name = "button2";
			this.button2.TabIndex = 3;
			this.button2.Text = "清空";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// sqlConnection1
			// 
			this.sqlConnection1.ConnectionString = "workstation id=XU;packet size=4096;integrated security=SSPI;data source=XU;persis" +
				"t security info=False;initial catalog=jifei";
			// 
			// frmDeleteUser
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(448, 174);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.label1);
			this.MaximizeBox = false;
			this.MinimizeBox = false;
			this.Name = "frmDeleteUser";
			this.ShowInTaskbar = false;
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "删除用户";
			this.Load += new System.EventHandler(this.frmDeleteUser_Load);
			this.ResumeLayout(false);

		}
		#endregion

		private void button2_Click(object sender, System.EventArgs e)
		{
			this.textBox1.Text="";
			this.textBox1.Focus();
			this.textBox1.SelectAll();
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			if(this.textBox1.TextLength==0)
			{
				MessageBox.Show("条码扫描错误！","删除用户",MessageBoxButtons.OK,MessageBoxIcon.Error);	
				goto finish;
			}
			sql="delete from 帐户表 where 条形码='"+this.textBox1.Text+"'";
			SqlCommand cmd=new SqlCommand(this.sql,this.sqlConnection1);
			this.sqlConnection1.Open();
			try
		    {
				numAff=cmd.ExecuteNonQuery();
			}

			catch(SqlException exe)
			{
				MessageBox.Show("出现错误！","删除用户",MessageBoxButtons.OK,MessageBoxIcon.Error);	
			}

			finally
			{
				this.sqlConnection1.Close();
				if(numAff==1)
					MessageBox.Show("删除成功！","删除用户",MessageBoxButtons.OK,MessageBoxIcon.Information);
				this.textBox1.Focus();
				this.textBox1.SelectAll();
			}
			finish:
				this.textBox1.Focus();
			    this.textBox1.SelectAll();
			
		}

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