ado.net實現對數據庫的添加、刪除和查看操作

 ado.net實現對數據庫的添加、刪除和查看操作。提示：添加刪除都不是查詢所以我們可以使用SqlCommand 的ExecuteNonQuery完成。  程序源碼：
 
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
 
namespace Infomation
{
    /// <summary>
    /// Form1 的摘要說明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.TextBox txtFlightNum;
        private System.Windows.Forms.TextBox txtName;
        private System.Windows.Forms.TextBox txtCertificate;
        private System.Windows.Forms.TextBox txtSeatId;
        private System.Windows.Forms.TextBox txtAge;
        private System.Windows.Forms.Button btnAdd;
        private System.Windows.Forms.Button btnDelete;
        private System.Windows.Forms.Button btnCancel;
        private System.Windows.Forms.ComboBox cboSex;
        private System.Windows.Forms.Label lblFlightNum;
        private System.Windows.Forms.Label lblName;
        private System.Windows.Forms.Label lblSex;
        private System.Windows.Forms.Label lblCertificate;
        private System.Windows.Forms.Label lblSeatId;
        private System.Windows.Forms.Label lblAge;
        /// <summary>
        /// 必需的設計器變量。
        /// </summary>
        private System.ComponentModel.Container components = null;
 
        public Form1()
        {
            //
            // Windows 窗體設計器支持所必需的
            //
            InitializeComponent();
 
            //
            // TODO: 在 InitializeComponent 調用後添加任何構造函數代碼
            //
        }
 
        /// <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.lblFlightNum = new System.Windows.Forms.Label();
            this.lblName = new System.Windows.Forms.Label();
            this.lblSex = new System.Windows.Forms.Label();
            this.lblCertificate = new System.Windows.Forms.Label();
            this.lblSeatId = new System.Windows.Forms.Label();
            this.lblAge = new System.Windows.Forms.Label();
            this.txtFlightNum = new System.Windows.Forms.TextBox();
            this.txtName = new System.Windows.Forms.TextBox();
            this.txtCertificate = new System.Windows.Forms.TextBox();
            this.txtSeatId = new System.Windows.Forms.TextBox();
            this.txtAge = new System.Windows.Forms.TextBox();
            this.btnAdd = new System.Windows.Forms.Button();
            this.btnDelete = new System.Windows.Forms.Button();
            this.btnCancel = new System.Windows.Forms.Button();
            this.cboSex = new System.Windows.Forms.ComboBox();
            this.SuspendLayout();
            // 
            // lblFlightNum
            // 
            this.lblFlightNum.Location = new System.Drawing.Point(24, 24);
            this.lblFlightNum.Name = "lblFlightNum";
            this.lblFlightNum.Size = new System.Drawing.Size(48, 23);
            this.lblFlightNum.TabIndex = 0;
            this.lblFlightNum.Text = "航班號:";
            // 
            // lblName
            // 
            this.lblName.Location = new System.Drawing.Point(24, 80);
            this.lblName.Name = "lblName";
            this.lblName.Size = new System.Drawing.Size(40, 23);
            this.lblName.TabIndex = 1;
            this.lblName.Text = "姓名:";
            // 
            // lblSex
            // 
            this.lblSex.Location = new System.Drawing.Point(24, 136);
            this.lblSex.Name = "lblSex";
            this.lblSex.Size = new System.Drawing.Size(40, 23);
            this.lblSex.TabIndex = 2;
            this.lblSex.Text = "性別:";
            // 
            // lblCertificate
            // 
            this.lblCertificate.Location = new System.Drawing.Point(256, 24);
            this.lblCertificate.Name = "lblCertificate";
            this.lblCertificate.Size = new System.Drawing.Size(48, 23);
            this.lblCertificate.TabIndex = 3;
            this.lblCertificate.Text = "證件號:";
            // 
            // lblSeatId
            // 
            this.lblSeatId.Location = new System.Drawing.Point(256, 80);
            this.lblSeatId.Name = "lblSeatId";
            this.lblSeatId.Size = new System.Drawing.Size(48, 23);
            this.lblSeatId.TabIndex = 4;
            this.lblSeatId.Text = "座位號:";
            // 
            // lblAge
            // 
            this.lblAge.Location = new System.Drawing.Point(256, 136);
            this.lblAge.Name = "lblAge";
            this.lblAge.Size = new System.Drawing.Size(40, 23);
            this.lblAge.TabIndex = 5;
            this.lblAge.Text = "年齡:";
            // 
            // txtFlightNum
            // 
            this.txtFlightNum.Location = new System.Drawing.Point(88, 24);
            this.txtFlightNum.Name = "txtFlightNum";
            this.txtFlightNum.TabIndex = 6;
            this.txtFlightNum.Text = "";
            // 
            // txtName
            // 
            this.txtName.Location = new System.Drawing.Point(88, 80);
            this.txtName.Name = "txtName";
            this.txtName.Size = new System.Drawing.Size(136, 21);
            this.txtName.TabIndex = 7;
            this.txtName.Text = "";
            // 
            // txtCertificate
            // 
            this.txtCertificate.Location = new System.Drawing.Point(320, 24);
            this.txtCertificate.Name = "txtCertificate";
            this.txtCertificate.Size = new System.Drawing.Size(168, 21);
            this.txtCertificate.TabIndex = 8;
            this.txtCertificate.Text = "";
            // 
            // txtSeatId
            // 
            this.txtSeatId.Location = new System.Drawing.Point(320, 80);
            this.txtSeatId.Name = "txtSeatId";
            this.txtSeatId.Size = new System.Drawing.Size(168, 21);
            this.txtSeatId.TabIndex = 9;
            this.txtSeatId.Text = "";
            // 
            // txtAge
            // 
            this.txtAge.Location = new System.Drawing.Point(320, 136);
            this.txtAge.Name = "txtAge";
            this.txtAge.TabIndex = 10;
            this.txtAge.Text = "";
            // 
            // btnAdd
            // 
            this.btnAdd.Location = new System.Drawing.Point(192, 216);
            this.btnAdd.Name = "btnAdd";
            this.btnAdd.TabIndex = 11;
            this.btnAdd.Text = "添加";
            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
            // 
            // btnDelete
            // 
            this.btnDelete.Location = new System.Drawing.Point(296, 216);
            this.btnDelete.Name = "btnDelete";
            this.btnDelete.TabIndex = 12;
            this.btnDelete.Text = "刪除";
            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
            // 
            // btnCancel
            // 
            this.btnCancel.Location = new System.Drawing.Point(400, 216);
            this.btnCancel.Name = "btnCancel";
            this.btnCancel.TabIndex = 13;
            this.btnCancel.Text = "取消";
            this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
            // 
            // cboSex
            // 
            this.cboSex.Items.AddRange(new object[] {
                                                        "男",
                                                        "女"});
            this.cboSex.Location = new System.Drawing.Point(88, 136);
            this.cboSex.Name = "cboSex";
            this.cboSex.Size = new System.Drawing.Size(121, 20);
            this.cboSex.TabIndex = 14;
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(512, 273);
            this.Controls.Add(this.cboSex);
            this.Controls.Add(this.btnCancel);
            this.Controls.Add(this.btnDelete);
            this.Controls.Add(this.btnAdd);
            this.Controls.Add(this.txtAge);
            this.Controls.Add(this.txtSeatId);
            this.Controls.Add(this.txtCertificate);
            this.Controls.Add(this.txtName);
            this.Controls.Add(this.txtFlightNum);
            this.Controls.Add(this.lblAge);
            this.Controls.Add(this.lblSeatId);
            this.Controls.Add(this.lblCertificate);
            this.Controls.Add(this.lblSex);
            this.Controls.Add(this.lblName);
            this.Controls.Add(this.lblFlightNum);
            this.Name = "Form1";
            this.Text = "乘客詳細信息";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.ResumeLayout(false);
 
        }
        #endregion
 
        /// <summary>
        /// 應用程序的主入口點。
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }
        
        //創建數據庫連接對象及命令對象
        private SqlConnection conn;
        private SqlCommand cmd;
 
        private void btnAdd_Click(object sender, System.EventArgs e)
        {
            
            string sql = "insert Flight values('"+this.txtFlightNum.Text+"','"+this.txtName.Text+"','"+this.cboSex.SelectedItem.ToString()+"','"+this.txtCertificate.Text+"','"+this.txtSeatId.Text+"',"+int.Parse(this.txtAge.Text)+")";
            try
            {
                conn.Open();//打開數據庫連接
                cmd = new SqlCommand(sql,conn);
                cmd.ExecuteNonQuery();//執行插入命令
                MessageBox.Show("數據添加成功");//提示執行結果
            }
            catch(SqlException ex)//捕獲異常
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                conn.Close();//關閉連接
            }
        }
 
        private void Form1_Load(object sender, System.EventArgs e)
        {
            //程序載入時創建數據庫連接
            conn = new SqlConnection("server = .;uid = sa;pwd = ;database = pubs");
        }
 
        private void btnDelete_Click(object sender, System.EventArgs e)
        {
            string sql = "delete from Flight where FlightNum ='"+this.txtFlightNum.Text+"'";
            try
            {
                conn.Open();//打開連接
                cmd = new SqlCommand(sql,conn);
                cmd.ExecuteNonQuery();//執行刪除數據操作
                MessageBox.Show("數據刪除成功");//提示刪除結果
            }
            catch(SqlException ex)//捕獲異常
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                conn.Close();//關閉連接
            }
        }
 
        private void btnCancel_Click(object sender, System.EventArgs e)
        {
            Application.Exit();
        }
    }
}