Data Caching

using System.Web.Caching;

Step 1. Cretae a Class DataCachingPage
Source View
Note : replace ! with < and * with >

!%@ Page Language="C#" AutoEventWireup="true" CodeFile="DataCachingPage.aspx.cs" Inherits="DataCachingPage" %*

!!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"*

!html xmlns="http://www.w3.org/1999/xhtml"*
!head runat="server"*
!title*!/title*
!script language="javascript" src="JScript.js" *

!/script*
!/head*
!body*
!form id="form1" runat="server"*
!div style="height: 274px; width: 362px"*

!asp:GridView ID="grvDataCaching" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="None" Height="257px" Width="337px"*
!/asp:GridView*
!br /*
!input id="Submit1" type="submit" value="Open Window" onclick ="startMethod()" /*
!/div*
!/form*
!/body*
!/html

.CS File.
protected void Page_Load(object sender, EventArgs e)
{
//In the Below scenerion we are using Output Caching
//Step: 1 Fill a Dataset Object with a Locally bulid XM File.
FillDataSet fds = new FillDataSet() { file_Path=@"C:\Documents and Settings\BS26691\Desktop\Test.xml"};
grvDataCaching.DataSource = fds.returnDataSet();
grvDataCaching.DataBind();
//Add the created Dataset into the Cache Object

/*------------ Description of Supplied parameters.---------
1. "Dataset"=Key Name of Cache object.
2. fds.returnDataSet()=Value which is kept inside the Cache object
3. new CacheDependency(fds.file_Path)=Object of CacheDependency Class
* This Parameter is set only in those scenerion where we want to Update our cache object
* specific to a file or Resource.
* In the below scenerion if XMl File is Changed
* than Cache Object will be Updated Accordingly
* If there is no CacheDependency than set it as Null
4. DateTime.MaxValue=Absolute Expiration
* IF we want that our cache will be expired after certain ammount of time
* Than we use this type of Expiration
* e.g Weather ForCasting where we are sure for data to be cached for a whole day.
* if we are not setting this than we need to set it as DateTime.MaxValue
5. TimeSpan.FromMinutes(20)=Slidding Expiration Time
* in the above scenerio the Cache object will be expired after 20 second of its access.
* That means it will not be expired after 20 second
* If Cache is accessed in last 19th second the it is going to persist for next 21 seconds.
* if we are not setting this than we need to set it as TimeSpan.Zero
------------------------------------------------------------------------------
* Note: AT A SINGLE TIME ONLY ONE PARAMETR NEED TO BE SET AMONG 4 AND 5
* BOTH PARAMETER CAN'T BE SET SIMULTANEOUSLY
------------------------------------------------------------------------------
*/

Cache.Insert("Dataset", fds.returnDataSet(), new CacheDependency(fds.file_Path), DateTime.MaxValue, TimeSpan.FromMinutes(20));

}

Step 2. Create a Class POP_UP window.aspx
Source View
Note : replace ! with < and * with >

!%@ Page Language="C#" AutoEventWireup="true" CodeFile="POP_UP window.aspx.cs" Inherits="POP_UP_window" %*
!!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"*
!html xmlns="http://www.w3.org/1999/xhtml"*
!head runat="server"*
!title*!/title*
!script language="javascript" src="JScript.js" *

!/script*
!style type="text/css"*
#Submit1 {
width: 121px;
}
!/style*
!/head*
!body*
!form id="form1" runat="server"*
!div*
Transported Data.
!br /*
!br /*
!br /*
!asp:GridView ID="grvDataCaching" runat="server" CellPadding="4"
ForeColor="#333333" GridLines="None" Height="224px" Width="367px"
AllowPaging="True"*
!RowStyle BackColor="#EFF3FB" /*
!/asp:GridView*
!br /*
!/div*
!p*
!/p*
!input id="Button2" type="Exit" value="button" OnClick="CloseMethod()" /*

!/form*

!/body*
!/html*
.CS File
protected void Page_Load(object sender, EventArgs e)
{
//Retrive DataSet Value From Cache Object
DataSet ds = Cache["Dataset"] as DataSet ;

// Always Check for Null reference before accessing the Cache object.
if (ds == null)
{
//If Cache is Blank than fill the dataset with local Test xml file
FillDataSet fds = new FillDataSet() { file_Path = @"C:\Documents and Settings\BS26691\Desktop\Test.xml" };
// Add Dataset Object to Cache
Cache.Insert("Dataset", fds.returnDataSet());
}
//Fill your GridView with Cache Object
DataSet dset = Cache["Dataset"] as DataSet;
grvDataCaching.DataSource = dset;
grvDataCaching.DataBind();

}

Step 3. Add A Third Class
public class FillDataSet
{
public string file_Path { get; set; }

public FillDataSet()
{
}
public DataSet returnDataSet()
{
DataSet ds = new DataSet();
ds.ReadXml(file_Path);
return ds;
}

}


Step 4.
Add A JScript.js File.
//This Function is called by a HTMl button
function startMethod() {
alert("After This Event POP-UP window will be Open.");
/*
"http://localhost:4909/DataCaching%2027_1.0/POP_UP%20window.aspx" Repalce this Path with exact Page Path
*/
mywindow = window.open("http://localhost:4909/DataCaching%2027_1.0/POP_UP%20window.aspx", "mywindow", "location=1,status=1,scrollbars=1");
mywindow.moveTo(10, 5);

}
// This method will Close the Open POP-UP window.
function CloseMethod() {
alert("Do You Want to Close This Window");
/*
"http://localhost:4909/DataCaching%2027_1.0/POP_UP%20window.aspx" Repalce this Path with exact Page Path
*/
if (window.open("http://localhost:4909/DataCaching%2027_1.0/POP_UP%20window.aspx", "mywindow", "location=1,status=1,scrollbars=1,width=500,height=500")) {
window.close();
}
}