ASP.NET 캐쉬를 사용한 게시판

게시판 캐싱

1. 속도를 빠르게..

2. DB 서버의 부담을 적게

데이타 베이스를 매번 조회 하지 않기 때문에 속도 향상

캐시 사용용도 : 사용횟수가 엄청나게 많거나, 비용이 엄청나게 많이 들거나. 할때사용

web.config

<?xml version="1.0"?>

<!--

ASP.NET 응용 프로그램을 구성하는 방법에 대한 자세한 내용을 보려면

http://go.microsoft.com/fwlink/?LinkId=169433 을 방문하십시오.

-->

</connectionStrings>

<system.web>

</system.web>

<system.webServer>

<files>

</files>

</defaultDocument>

</system.webServer>

</configuration>

Add.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Board.master" AutoEventWireup="true" CodeFile="Add.aspx.cs" Inherits="Add" ValidateRequest="false" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

</asp:Content>

<asp:Content ID="Content2" runat="server"

contentplaceholderid="ContentPlaceHolder1">

<tr>

이름</td>

 <asp:TextBox ID="TextBoxName" runat="server" CssClass="txt" Width="100px"></asp:TextBox>

 </td>

</tr>

<tr>

이메일</td>

 <asp:TextBox ID="TextBoxEmail" runat="server" CssClass="txt" Width="250px"></asp:TextBox>

 </td>

</tr>

<tr>

제목</td>

 <asp:TextBox ID="TextBoxSubject" runat="server" CssClass="txt" Width="95%"></asp:TextBox>

 </td>

</tr>

<tr>

내용</td>

 <asp:TextBox ID="TextBoxContent" runat="server" CssClass="txt" Height="150px"

TextMode="MultiLine" Width="95%"></asp:TextBox>

 </td>

</tr>

<tr>

태그적용</td>

 <asp:CheckBox ID="CheckBoxTag" runat="server" Text="HTML 태그 적용함" />

 </td>

</tr>

<tr>

암호</td>

 <asp:TextBox ID="TextBoxPwd" runat="server" CssClass="txt" TextMode="Password"

Width="100px"></asp:TextBox>

 </td>

</tr>

</table>

<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/list.gif"

onclick="ImageButton1_Click" ValidationGroup="list" />

 <asp:ImageButton ID="ImageButton2" runat="server" ImageUrl="~/images/write.gif"

onclick="ImageButton2_Click" />

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"

ControlToValidate="TextBoxName" Display="None" ErrorMessage="이름을 입력하세요."

SetFocusOnError="True"></asp:RequiredFieldValidator>

<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"

ControlToValidate="TextBoxSubject" Display="None" ErrorMessage="제목을 입력하세요."

SetFocusOnError="True"></asp:RequiredFieldValidator>

<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"

ControlToValidate="TextBoxContent" Display="None" ErrorMessage="내용을 입력하세요."

SetFocusOnError="True"></asp:RequiredFieldValidator>

<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server"

ControlToValidate="TextBoxPwd" Display="None" ErrorMessage="암호를 입력하세요."

SetFocusOnError="True"></asp:RequiredFieldValidator>

<asp:ValidationSummary ID="ValidationSummary1" runat="server"

ShowMessageBox="True" ShowSummary="False" />

</div>

</asp:Content>

Add.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

public partial class Add : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)

{

//List

Response.Redirect("List.aspx");

}

protected void ImageButton2_Click(object sender, ImageClickEventArgs e)

{

//Write

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conStr"].ConnectionString);

SqlCommand cmd = new SqlCommand();

cmd.Connection = con;

cmd.CommandText = "insert into Board (name, email, subject, content, tag, pwd, userIP) values (@name, @email, @subject, @content, @tag, @pwd, @userIP)";

//매개변수

cmd.Parameters.Add("@name", SqlDbType.NVarChar, 20);

cmd.Parameters.Add("@email", SqlDbType.VarChar, 50);

cmd.Parameters.Add("@subject", SqlDbType.NVarChar, 100);

cmd.Parameters.Add("@content", SqlDbType.NVarChar, 3000);

cmd.Parameters.Add("@tag", SqlDbType.Char, 1);

cmd.Parameters.Add("@pwd", SqlDbType.VarChar, 20);

cmd.Parameters.Add("@userIP", SqlDbType.VarChar, 15);

//값

cmd.Parameters["@name"].Value = TextBoxName.Text;

cmd.Parameters["@email"].Value = TextBoxEmail.Text;

cmd.Parameters["@subject"].Value = TextBoxSubject.Text;

cmd.Parameters["@content"].Value = TextBoxContent.Text;

cmd.Parameters["@tag"].Value = CheckBoxTag.Checked ? "y" : "n";

cmd.Parameters["@pwd"].Value = TextBoxPwd.Text;

cmd.Parameters["@userIP"].Value = Request.UserHostAddress;

con.Open();

cmd.ExecuteNonQuery();

con.Close();

string script = @"<script type='text/javascript'>

alert('글쓰기 완료!!');

location.href = 'List.aspx';

</script>";

this.ClientScript.RegisterClientScriptBlock(this.GetType(), "add", script);

//제어가 이곳까지 왔다는것은..

//기존에 Cache["ds"]와 실제 DB의 게시물 데이터가 다르다.

// Cache["ds"] : 20건 != DB : 21건

//기존 캐시의 ds를 폐기하고.. 21건짜리의 ds를 다시 생성

SqlDataAdapter adapter = new SqlDataAdapter("SELECT [seq], [name], [subject], [readCount], [regDate], [email] FROM [Board] ORDER BY [seq] DESC", ConfigurationManager.ConnectionStrings["conStr"].ConnectionString);

DataSet ds = new DataSet();

adapter.Fill(ds, "Board");

//데이터 캐시 처리 - 덮어쓰기(20건 -> 21건)

//새로운 데이터가 올바르게 반영..

Cache.Insert("ds", ds);

}

Del.aspx.

<%@ Page Title="" Language="C#" MasterPageFile="~/Board.master" AutoEventWireup="true" CodeFile="Del.aspx.cs" Inherits="Del" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<tr>

암호</td>

 <asp:TextBox ID="TextBoxPwd" runat="server" CssClass="txt" Width="100px" TextMode="Password"></asp:TextBox>

 </td>

</tr>

</table>

<asp:ImageButton ID="ImageButton1" runat="server"

ImageUrl="~/images/back.gif" />

 <asp:ImageButton ID="ImageButton2" runat="server"

ImageUrl="~/images/delete.gif" onclick="ImageButton2_Click" />

 </div>

</asp:Content>

Del.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

public partial class Del : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void ImageButton2_Click(object sender, ImageClickEventArgs e)

{

//삭제하기

//1. 암호가 일치?

//2. 삭제 or 취소

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conStr"].ConnectionString);

SqlCommand cmd = new SqlCommand();

cmd.Connection = con;

cmd.CommandText = "select count(*) from Board where seq=@seq and pwd=@pwd";

cmd.Parameters.Add("@seq", SqlDbType.Int);

cmd.Parameters.Add("@pwd", SqlDbType.VarChar, 20);

cmd.Parameters["@seq"].Value = Request.QueryString["seq"];

cmd.Parameters["@pwd"].Value = TextBoxPwd.Text;

con.Open();

int result = (int)cmd.ExecuteScalar();

string script = "";

if (result == 1)

{

//암호가 일치하기 때문에.. 게시물 Delete

cmd.CommandText = @"delete from Board

where seq=@seq";

cmd.ExecuteNonQuery();//delete

script = @"<script type='text/javascript'>

alert('삭제 완료!!');

location.href='List.aspx';

</script>";

}

else

{

script = @"<script type='text/javascript'>

alert('암호가 일치하지 않습니다!!');

</script>";

}

con.Close();

this.ClientScript.RegisterClientScriptBlock(this.GetType(), "edit", script);

DataSet ds = new DataSet();

adapter.Fill(ds, "Board");

//데이터 캐시 처리 - 덮어쓰기(20건 -> 21건)

//새로운 데이터가 올바르게 반영..

Cache.Insert("ds", ds);

}

Edit.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Board.master" AutoEventWireup="true" CodeFile="Edit.aspx.cs" Inherits="Edit" ValidateRequest="false" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<tr>

이름</td>

 <asp:TextBox ID="TextBoxName" runat="server" CssClass="txt" Width="100px"></asp:TextBox>

 </td>

</tr>

<tr>

이메일</td>

 <asp:TextBox ID="TextBoxEmail" runat="server" CssClass="txt" Width="250px"></asp:TextBox>

 </td>

</tr>

<tr>

제목</td>

 <asp:TextBox ID="TextBoxSubject" runat="server" CssClass="txt" Width="95%"></asp:TextBox>

 </td>

</tr>

<tr>

내용</td>

 <asp:TextBox ID="TextBoxContent" runat="server" CssClass="txt" Height="150px"

TextMode="MultiLine" Width="95%"></asp:TextBox>

 </td>

</tr>

<tr>

태그적용</td>

 <asp:CheckBox ID="CheckBoxTag" runat="server" Text="HTML 태그 적용함" />

 </td>

</tr>

<tr>

암호</td>

 <asp:TextBox ID="TextBoxPwd" runat="server" CssClass="txt" TextMode="Password"

Width="100px"></asp:TextBox>

 </td>

</tr>

</table>

<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/back.gif"

onclick="ImageButton1_Click" ValidationGroup="list" Width="39px" />

 <asp:ImageButton ID="ImageButton2" runat="server" ImageUrl="~/images/modify.gif"

onclick="ImageButton2_Click" />

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"

ControlToValidate="TextBoxName" Display="None" ErrorMessage="이름을 입력하세요."

SetFocusOnError="True"></asp:RequiredFieldValidator>

<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"

ControlToValidate="TextBoxSubject" Display="None" ErrorMessage="제목을 입력하세요."

SetFocusOnError="True"></asp:RequiredFieldValidator>

<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"

ControlToValidate="TextBoxContent" Display="None" ErrorMessage="내용을 입력하세요."

SetFocusOnError="True"></asp:RequiredFieldValidator>

<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server"

ControlToValidate="TextBoxPwd" Display="None" ErrorMessage="암호를 입력하세요."

SetFocusOnError="True"></asp:RequiredFieldValidator>

<asp:ValidationSummary ID="ValidationSummary1" runat="server"

ShowMessageBox="True" ShowSummary="False" />

</div>

</asp:Content>

Edit.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

public partial class Edit : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conStr"].ConnectionString);

SqlCommand cmd = new SqlCommand();

cmd.Connection = con;

cmd.CommandText = "select * from Board where seq=@seq";

cmd.Parameters.Add("@seq", SqlDbType.Int);

cmd.Parameters["@seq"].Value = Request.QueryString["seq"];

con.Open();

SqlDataReader reader = cmd.ExecuteReader();

if (reader.Read())

{

//출력

TextBoxName.Text = reader["name"].ToString();

TextBoxEmail.Text = reader["email"].ToString();

TextBoxSubject.Text = reader["subject"].ToString();

//글내용

TextBoxContent.Text = reader["content"].ToString();

CheckBoxTag.Checked = reader["tag"].ToString() == "y" ? true : false;

}

reader.Close();

con.Close();

}

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)

{

}

protected void ImageButton2_Click(object sender, ImageClickEventArgs e)

{

//수정하기

//1. 암호가 일치?

//2. 수정 or 취소

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conStr"].ConnectionString);

SqlCommand cmd = new SqlCommand();

cmd.Connection = con;

cmd.CommandText = "select count(*) from Board where seq=@seq and pwd=@pwd";

cmd.Parameters.Add("@seq", SqlDbType.Int);

cmd.Parameters.Add("@pwd", SqlDbType.VarChar, 20);

cmd.Parameters["@seq"].Value = Request.QueryString["seq"];

cmd.Parameters["@pwd"].Value = TextBoxPwd.Text;

con.Open();

int result = (int)cmd.ExecuteScalar();

string script = "";

if (result == 1)

{

//암호가 일치하기 때문에.. 게시물 Update

cmd.CommandText = @"update Board set

name=@name,

email=@email,

subject=@subject,

content=@content,

tag=@tag,

userIP=@userIP,

regDate=getdate()

where seq=@seq";

//매개변수

cmd.Parameters.Add("@name", SqlDbType.NVarChar, 20);

cmd.Parameters.Add("@email", SqlDbType.VarChar, 50);

cmd.Parameters.Add("@subject", SqlDbType.NVarChar, 100);

cmd.Parameters.Add("@content", SqlDbType.NVarChar, 3000);

cmd.Parameters.Add("@tag", SqlDbType.Char, 1);

cmd.Parameters.Add("@userIP", SqlDbType.VarChar, 15);

//값

cmd.Parameters["@name"].Value = TextBoxName.Text;

cmd.Parameters["@email"].Value = TextBoxEmail.Text;

cmd.Parameters["@subject"].Value = TextBoxSubject.Text;

cmd.Parameters["@content"].Value = TextBoxContent.Text;

cmd.Parameters["@tag"].Value = CheckBoxTag.Checked ? "y" : "n";

cmd.Parameters["@userIP"].Value = Request.UserHostAddress;

cmd.ExecuteNonQuery();//update

script = @"<script type='text/javascript'>

alert('수정 완료!!');

location.href='List.aspx';

</script>";

}

else

{

script = @"<script type='text/javascript'>

alert('암호가 일치하지 않습니다!!');

</script>";

}

con.Close();

this.ClientScript.RegisterClientScriptBlock(this.GetType(), "edit", script);

DataSet ds = new DataSet();

adapter.Fill(ds, "Board");

//데이터 캐시 처리 - 덮어쓰기(20건 -> 21건)

//새로운 데이터가 올바르게 반영..

Cache.Insert("ds", ds);

}

List.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Board.master" AutoEventWireup="true" CodeFile="List.aspx.cs" Inherits="List" Trace="true" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<asp:GridView ID="GridView1" runat="server" AllowPaging="True"

AutoGenerateColumns="False" CssClass="table" DataKeyNames="seq" onrowdatabound="GridView1_RowDataBound"

Width="600px">

<asp:BoundField DataField="seq" HeaderText="번호" InsertVisible="False"

ReadOnly="True" SortExpression="seq">

</asp:BoundField>

<asp:HyperLinkField DataNavigateUrlFields="seq"

DataNavigateUrlFormatString="View.aspx?seq={0}" DataTextField="subject"

HeaderText="제목">

</asp:HyperLinkField>

<asp:BoundField DataField="name" HeaderText="이름" SortExpression="name">

</asp:BoundField>

<asp:BoundField DataField="regDate" DataFormatString="{0:yyyy-MM-dd}"

HeaderText="날짜" SortExpression="regDate">

</asp:BoundField>

<asp:BoundField DataField="readCount" HeaderText="읽음"

SortExpression="readCount">

</asp:BoundField>

</Columns>

</asp:GridView>

 <asp:ImageButton ID="ImageButton1" runat="server"

ImageUrl="~/images/write.gif" onclick="ImageButton1_Click" />

</div>

</asp:Content>

List.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

public partial class List : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

//조회수 증가용 쿠키 할당

Response.Cookies["read"].Value = "n";

DataSet ds = null;

//이전에 누군가 ds를 캐시에 넣어놨다면..?

if (Cache["ds"] == null)

{//1회

//데이터 바인딩

ds = new DataSet();

adapter.Fill(ds, "Board");

//데이터 캐시 처리

Cache.Insert("ds", ds);

}

else

{//99회

ds = Cache["ds"] as DataSet;

}

GridView1.DataSource = ds.Tables["Board"];

GridView1.DataBind();

}

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)

{

//글쓰기

Response.Redirect("Add.aspx");

}

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

//1. 제목이 길면.. 자르기

//e.Row <- 한행(GridViewRow) x 5개

HyperLink subject = e.Row.Cells[1].Controls[0] as HyperLink;

if (subject.Text.Length > 20)

{

subject.Text = subject.Text.Substring(0, 20) + "...";

}

//2. 글쓴지 일정시간이내면.. new.gif 표시

// 30분이내

//Response.Write(e.Row.Cells[3].Text + "<br />");

//현재 바인딩되거나 바인딩된 데이터에 접근하는 방법

//A. 출력된 결과값에 접근하는 방법(Cells을 사용)

//Response.Write(e.Row.Cells[2].Text);

//B. (출력과 상관없이)바인딩되는 원본에 접근하는 방법

// 조건 : 데이터원본에는 있어야함(select의 대상)

//데이터원본(seq, subject, name, regDate, readCount, email)

DataRowView row = e.Row.DataItem as DataRowView;

//Response.Write(row["email"].ToString());

//Response.Write(row["regDate"].ToString());

DateTime regDate = (DateTime)row["regDate"];

TimeSpan gap = DateTime.Now - regDate;

if (gap.TotalMinutes <= 30)

{

//30이내에 쓴글

//e.Row.Cells[1]

LiteralControl img = new LiteralControl("<img src='images/new.gif' alt='새글' style='margin-left:5px;' />");

e.Row.Cells[1].Controls.Add(img);

//e.Row.Cells[1].Controls.AddAt(0, img);

}

View.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Board.master" AutoEventWireup="true" CodeFile="View.aspx.cs" Inherits="View" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<tr>

이름</td>

 <asp:Label ID="LabelName" runat="server"></asp:Label>

 </td>

</tr>

<tr>

이메일</td>

 <asp:Label ID="LabelEmail" runat="server"></asp:Label>

 </td>

</tr>

<tr>

제목</td>

 <asp:Label ID="LabelSubject" runat="server"></asp:Label>

 </td>

</tr>

<tr>

내용</td>

<asp:Label ID="LabelContent" runat="server"></asp:Label>

</td>

</tr>

<tr>

번호</td>

 <asp:Label ID="LabelSeq" runat="server"></asp:Label>

 </td>

</tr>

<tr>

읽음</td>

 <asp:Label ID="LabelReadCount" runat="server"></asp:Label>

 </td>

</tr>

<tr>

날짜</td>

 <asp:Label ID="LabelRegDate" runat="server"></asp:Label>

 </td>

</tr>

</table>

<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/list.gif"

onclick="ImageButton1_Click" ValidationGroup="list" />

 <asp:ImageButton ID="ImageButton3" runat="server" ImageUrl="~/images/modify.gif"

onclick="ImageButton3_Click" />

 <asp:ImageButton ID="ImageButton4" runat="server" ImageUrl="~/images/delete.gif"

onclick="ImageButton4_Click" />

</div>

</asp:Content>

View.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

public partial class View : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

//seq의 상세보기

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conStr"].ConnectionString);

SqlCommand cmd = new SqlCommand();

cmd.Connection = con;

cmd.CommandText = "update Board set readCount = readCount + 1 where seq=@seq;";

cmd.Parameters.Add("@seq", SqlDbType.Int);

cmd.Parameters["@seq"].Value = Request.QueryString["seq"];

con.Open();

//쿠키 확인 작업

if (Request.Cookies["read"] == null || Request.Cookies["read"].Value == "n")

{

cmd.ExecuteNonQuery();//조회수 증가

Response.Cookies["read"].Value = "y";

}

cmd.CommandText = "select * from Board where seq=@seq";

SqlDataReader reader = cmd.ExecuteReader();

if (reader.Read())

{

//출력

LabelName.Text = string.Format("{0} [{1}]", reader["name"].ToString(), reader["userIP"].ToString());

LabelEmail.Text = reader["email"].ToString();

LabelSubject.Text = reader["subject"].ToString();

//글내용

string content = reader["content"].ToString();

//태그적용 안함 처리 ( < -> <)

if (reader["tag"].ToString() == "n")

{

content = Server.HtmlEncode(content);

}

//<script> 무조건 적용안함

content = content.Replace("<script", "<script").Replace("</script>", "&lt/script>");

//엔터값처리 -> <br />

content = content.Replace("\r\n", "<br />");

LabelContent.Text = content;

LabelSeq.Text = reader["seq"].ToString();

LabelReadCount.Text = reader["readCount"].ToString();

LabelRegDate.Text = reader["regDate"].ToString();

}

reader.Close();

con.Close();

}

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)

{

//List

Response.Redirect("List.aspx");

}

protected void ImageButton3_Click(object sender, ImageClickEventArgs e)

{

//수정 Edit.aspx?seq=5

Response.Redirect("Edit.aspx?seq=" + Request.QueryString["seq"]);

}

protected void ImageButton4_Click(object sender, ImageClickEventArgs e)

{

//삭제 Del.aspx?seq=5

Response.Redirect("Del.aspx?seq=" + Request.QueryString["seq"]);

}

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