Asp.net 序列化应用实例

原文作者：寻梦E.net
原文地址： http://www.cnblogs.com/lsmsky/archive/2008/01/15/1040190.html

这是本人这几天学习序列化的几个例子，源代码下载：http://files.cnblogs.com/lsmsky/serializetest.rar 

实体类User

 

using  System;
using  System.IO;
using  System.Runtime.Serialization;
using  System.Runtime.Serialization.Formatters.Binary;
using  System.Collections.Specialized;
using  System.Collections;

namespace  test
{
    /**//// <summary>
    /// 用户类
    /// User 的摘要说明。
    /// </summary>
    public class User
    {
        //数据表有的字段
        private int userID ;
        private string username;
        private string password;
        private string nickname;
        private string email;
    
        private NameValueCollection extendedAttributes = new NameValueCollection();

        public int UserID
        {
            get{return this.userID;}
            set{this.userID = value;}
        }

        public string UserName
        {
            get{return this.username;}
            set{this.username = value;}
        }

        public string Password
        {
            get{return this.password;}
            set{this.password = value;}            
        }
        
        public string Nickname
        {
            get{return this.nickname;}
            set{this.nickname = value;}            
        }

        public string Email
        {
            get{return this.email;}
            set{this.email = value;}            
        }

        /**////    <summary>
        ///    以下三个字段为数据表没有的字段
        ///    </summary>
        public String QQ
        {
            get { return GetExtendedAttribute("qq"); }
            set { SetExtendedAttribute("qq", value); }
        }

        public String Homepage
        {
            get { return GetExtendedAttribute("homepage"); }
            set { SetExtendedAttribute("homepage", value); }
        }

        public String Phone
        {
            get { return GetExtendedAttribute("phone"); }
            set { SetExtendedAttribute("phone", value); }

        }

        public string GetExtendedAttribute(string name)
        {
            string returnValue = extendedAttributes[name];

            if (returnValue == null)
                return string.Empty;
            else
                return returnValue;
        }

        public void SetExtendedAttribute(string name, string value)
        {
            extendedAttributes[name] = value;

        }

        //序列化extendedAttributes集合
        public byte[] SerializeExtendedAttributes()
        {
            BinaryFormatter binaryFormatter = new BinaryFormatter();
            MemoryStream ms = new MemoryStream();
            byte[] b;
            binaryFormatter.Serialize(ms, extendedAttributes);
            ms.Position = 0;
            b = new Byte[ms.Length];
            ms.Read(b, 0, b.Length);
            ms.Close();
            return b;
        }

        //反序列化extendedAttributes集合
        public void DeserializeExtendedAttributes(byte[] serializedExtendedAttributes)
        {
            if (serializedExtendedAttributes.Length == 0)
                return;
            try
            {
                BinaryFormatter binaryFormatter = new BinaryFormatter();
                MemoryStream ms = new MemoryStream();
                ms.Write(serializedExtendedAttributes, 0, serializedExtendedAttributes.Length);
                ms.Position = 0;
                extendedAttributes = (NameValueCollection) binaryFormatter.Deserialize(ms);

                ms.Close();
            }
            catch
            {
            }
        }

    }
}

前端代码：

using  System;
using  System.Collections;
using  System.ComponentModel;
using  System.Data;
using  System.Drawing;
using  System.Web;
using  System.Web.SessionState;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.HtmlControls;
using  EmanUtils;
using  System.Data.SqlClient;



namespace  test
{
    /**//// <summary>
    /// Serialize1 的摘要说明。
    /// </summary>
    public class Serialize1 : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.TextBox txtUserName;
        protected System.Web.UI.WebControls.TextBox txtPws;
        protected System.Web.UI.WebControls.TextBox txtQQ;
        protected System.Web.UI.WebControls.TextBox txtHomepage;
        protected System.Web.UI.WebControls.Label lbMsg;
        protected System.Web.UI.WebControls.TextBox txtNick;
        protected System.Web.UI.WebControls.TextBox txtEmail;
        protected System.Web.UI.WebControls.DataGrid DataGrid1;
        protected System.Web.UI.WebControls.Panel Panel1;
        protected System.Web.UI.WebControls.TextBox txtTel;
        protected System.Web.UI.HtmlControls.HtmlInputHidden hiduserid;
        protected System.Web.UI.WebControls.Button btnAction;
        
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            if(! this.IsPostBack)
                BindData();
        }

        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <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.DataGrid1.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_ItemCommand);
            this.btnAction.Click += new System.EventHandler(this.btnAction_Click);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion

        private void BindData()
        {

            DataGrid1.DataSource = GetUserList();
            DataGrid1.DataBind();

        }

        private void btnAction_Click(object sender, System.EventArgs e)
        {
            User _user = new User();

            _user.UserName = txtUserName.Text;
            _user.Password = txtPws.Text;
            _user.Nickname = txtNick.Text;
            _user.Email = txtEmail.Text;

            _user.QQ = txtQQ.Text;
            _user.Homepage = txtHomepage.Text;
            _user.Phone = txtTel.Text;

            if(btnAction.Text =="新增")
            {
                            
                AddUser(_user);
                lbMsg.Text = "新增成功";
                
            }

            if(btnAction.Text =="修改")
            {
                int userID = 0;
                string hidUserID = hiduserid.Value;

                if(hidUserID != string.Empty  || hidUserID != null )
                {
                    userID = Convert.ToInt32(hiduserid.Value);    
                    
                    _user.UserID = userID ;
                    UpdateUser(_user);
                    lbMsg.Text = "修改成功";
                }
                else
                {
                    lbMsg.Text = "参数userID为空";

                }

                

            }

            BindData();


        
        }
    
        private void BindUserInfo(User user)
        {
            txtUserName.Text = user.UserName;
            txtPws.Text = user.Password;
            txtNick.Text = user.Nickname;
            txtEmail.Text = user.Email;
            txtQQ.Text = user.QQ;
            txtHomepage.Text = user.Homepage;
            txtTel.Text = user.Phone;
            hiduserid.Value = user.UserID.ToString();

        }

        private void ClearBind()
        {
            txtUserName.Text = "";
            txtPws.Text = "";
            txtNick.Text = "";
            txtEmail.Text = "";
            txtQQ.Text = "";
            txtHomepage.Text = "";
            txtTel.Text = "";

        }

        private void DataGrid1_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            if(e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
            {
                int id = Convert.ToInt32(DataGrid1.DataKeys[e.Item.ItemIndex].ToString());
                if(e.CommandName == "Update")
                {
                    User user = GetUserInfo(id);
                    BindUserInfo(user);
                    btnAction.Text = "修改";

                }

                if(e.CommandName == "Add")
                {
                    ClearBind();
                    btnAction.Text = "新增";

                }

            }
        }

        //新增用户
        private void AddUser(User user)
        {
        
            string sql = "Insert into UserInfo([UserPws],[UserName],[Nickname],[Email],[ExtendInfo]) Values"; 
            sql += "(@Password,@UserName,@Nickname,@Email,@ExtendInfo)";

            SqlParameter[] prams =
            {
                
                Database.MakeInParam("@UserName",SqlDbType.NVarChar,50,user.UserName),
                Database.MakeInParam("@Password",SqlDbType.NVarChar,50,user.Password),
                Database.MakeInParam("@Nickname",SqlDbType.NVarChar,50,user.Nickname),
                Database.MakeInParam("@Email",SqlDbType.NVarChar,50,user.Email),
                Database.MakeInParam("@ExtendInfo",SqlDbType.VarBinary,7000,user.SerializeExtendedAttributes())
            };

            Database.ExecuteNonQuery(CommandType.Text,sql,prams);

        }

        //更新用户
        private void UpdateUser(User user)
        {
            string sql = "UPDATE UserInfo SET UserPws = @Password,UserName =@UserName,Nickname =@Nickname,Email =@Email,"; 
                  sql += "ExtendInfo =@ExtendInfo WHERE UserID = @UserID";

            SqlParameter[] prams = {
                                       Database.MakeInParam("@UserID",SqlDbType.Int,4,user.UserID),
                                       Database.MakeInParam("@UserName",SqlDbType.NVarChar,50,user.UserName),
                                       Database.MakeInParam("@Password",SqlDbType.NVarChar,50,user.Password),
                                       Database.MakeInParam("@Nickname",SqlDbType.NVarChar,50,user.Nickname),
                                       Database.MakeInParam("@Email",SqlDbType.NVarChar,50,user.Email),
                                       Database.MakeInParam("@ExtendInfo",SqlDbType.VarBinary,7000,user.SerializeExtendedAttributes())                 
                                      
                                   };
            Database.ExecuteNonQuery(CommandType.Text,sql,prams);
        }

        private User GetUserInfo(int userid)
        {
            string sql = "select * from UserInfo where UserID=@UserID";

            SqlParameter[] prams = {
                                       Database.MakeInParam("@UserID",SqlDbType.Int,4,userid)
                                   };

            SqlDataReader  dr = Database.ExecuteReader(CommandType.Text,sql,prams);
            User user = new User();

            if(dr.Read())
            {
                
                user.UserID =  Convert.ToInt32(dr["UserID"]);
                user.UserName = Convert.ToString(dr["UserName"]);
                user.Password = Convert.ToString(dr["UserPws"]);
                user.Nickname = Convert.ToString(dr["Nickname"]);
                user.Email = Convert.ToString(dr["Email"]);
                user.DeserializeExtendedAttributes((byte[])dr["ExtendInfo"]);

            }
            return user;

        }

        private ArrayList  GetUserList()
        {
            ArrayList userslist = new ArrayList();
            string sql = "select * from UserInfo";
            SqlDataReader  dr = Database.ExecuteReader(CommandType.Text,sql);
            while( dr.Read())
                userslist.Add(UserDataReader(dr)); 
            return userslist;


        }

        public static User UserDataReader(IDataReader dr)
        {
            
            User user = new User();
            user.UserID =  Convert.ToInt32(dr["UserID"]);
            user.UserName = Convert.ToString(dr["UserName"]);
            user.Password = Convert.ToString(dr["UserPws"]);
            user.Nickname = Convert.ToString(dr["Nickname"]);
            user.Email = Convert.ToString(dr["Email"]);
            user.DeserializeExtendedAttributes((byte[])dr["ExtendInfo"]);

            return user;
        }

    }
    
}