企業類庫之Caching Application Block (一)

 

配置文件

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="cachingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Caching.Configuration.CacheManagerSettings,Microsoft.Practices.EnterpriseLibrary.Caching" />
  </configSections>

  <cachingConfiguration defaultCacheManager="Default Cache Manager">
    <backingStores>
      <add name="inMemory"
                type="Microsoft.Practices.EnterpriseLibrary.Caching.BackingStoreImplementations.NullBackingStore, Microsoft.Practices.EnterpriseLibrary.Caching" />
    </backingStores>

    <cacheManagers>
      <add name="Default Cache Manager"
                expirationPollFrequencyInSeconds="60"
                maximumElementsInCacheBeforeScavenging="1000"
                numberToRemoveWhenScavenging="10"
                backingStoreName="inMemory" />
      <add name="Loading Scenario Cache Manager"
                expirationPollFrequencyInSeconds="60"
                maximumElementsInCacheBeforeScavenging="1000"
                numberToRemoveWhenScavenging="10"
                backingStoreName="inMemory" />
    </cacheManagers>
  </cachingConfiguration>
</configuration>

 

 使用程式

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Practices.EnterpriseLibrary.Caching;
using Microsoft.Practices.EnterpriseLibrary.Caching.Expirations;

namespace Demo001
...{
    public partial class Form1 : Form
    ...{
        private CacheManager cache = CacheFactory.GetCacheManager("Loading Scenario Cache Manager");
        public Form1()
        ...{
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        ...{
            Prodect prodect = new Prodect(textBox1.Text, textBox2.Text, Convert.ToInt32(textBox3.Text));

            cache.Add(prodect.ProdectID, prodect, CacheItemPriority.Normal, null, new SlidingTime(TimeSpan.FromSeconds(10)));
        }

        private void button2_Click(object sender, EventArgs e)
        ...{
            cache.Flush();
        }

        private void button3_Click(object sender, EventArgs e)
        ...{
            try
            ...{
                MessageBox.Show(((Prodect)cache.GetData(textBox1.Text)).ProdectName);
            }
            catch (Exception Err)
            ...{
                MessageBox.Show(Err.Message);
            }
        }

        private void button4_Click(object sender, EventArgs e)
        ...{
            cache.Remove(textBox1.Text);
        }

        private void button5_Click(object sender, EventArgs e)
        ...{
            MessageBox.Show(cache.Count.ToString());
        }
    }

    class Prodect
    ...{
        private string ID;
        private string Name;
        private int Price;
        public Prodect(string id, string name, int price)
        ...{
            ID = id;
            Name = name;
            Price = price;
        }

        public string ProdectID
        ...{
            get
            ...{
                return ID;
            }
        }
        public string ProdectName
        ...{
            get
            ...{
                return Name;
            }
        }
    }
}