ASP.Net缓存问题/问题。 缓存位置和方式。 | Costum ADO.Net代码

Question

i am developing an ASP.Net e-commerce application. I use ASP.Net Web Forms. When i finish the overall application i was consider about Cache some data so the application performance will increase. (bad idea...i must have consider that from the beginning)

I don't use build-in controls such datagrid. I neather use MS-Sql.

I use MySql server us database and custom UserControls that i develop. (Custom ADO.Net code)

To get data from the Database i use :

An object that represent the fields of the table IE : If my table (MyTable) has :

ID , Title, Date

I create will create an object like the above :

public class MyTable{
  public int ID {get;set;}
  public string Title {get;set;}
  public Datetime Date {get;set;}
}

To manage fields from the table i use something like above:

public class MyTableDatabaseManager{
   //Insert a row 
   public bool insertMyTable(MyTable item){
     //...Open a mysql connection , do job , close it.
   }
   //Update a row 
   public bool updateMyTable(MyTable item){
     //...Open a mysql connection , do job , close it.
   }
   //Delete a row 
   public bool deleteMyTable(MyTable item){
     //...Open a mysql connection , do job , close it.
   }
   //Get one row
   public MyTable deleteMyTable(int id){
     //...Open a mysql connection , do job , close it.
   }
    //Get some rows or all of them
   public List<MyTable> deleteMyTable(int limit,int page,bool Ordering){
     //...Open a mysql connection , do job , close it.
   }
}

My questions are:

How can i store some data in the cache so i have not to communicate all the time with the database?

How can i reset the cache programmaticaly when data is changed?

(I know how, but where i put the code:P it can be in the code-behind files when i do changes or insert some values, or somewhere else?)

Output cache don't work for me, because the most of the provided data are user-specific. (about 80% of them)

Thank you very much:)

Answer 1

Simply insert into the cache with the key being your userId or whatever you want to vary it by.

Cache.Insert(yourUserIdOrWhateverKey, yourObject);

http://msdn.microsoft.com/en-us/library/6hbbsfk6%28v=VS.100%29.aspx

Note this cache viewer (also check out the msdn link above)

http://authors.aspalliance.com/aldotnet/examples/cacheviewer.aspx

To remove you can just call

Cache.Remove(yourKey);

See: http://aspdotnetfaq.com/Faq/How-to-clear-your-ASP-NET-applications-Cache.aspx

To check if your item is in the cache simply do

var yourCachedObject = (CustomClass)Cache["YourUserKey"];
if(yourCachedObject == null)
{
   //it wasnt in the cache
}