1 protected void Page_Load(object sender, EventArgs e) 
 2 { 
 3 if (!Page.IsPostBack) 
 4 { 
 5 // Gets product id from table Production.Product. 
 6 // Then binding data to drop down list control. 
 7 InitControl(GetProductId()); 
 8 } 
 9 } 
10 /// <summary> 
11 /// Handles the Click event of the btnSubmit control. 
12 /// Redirects to relative product information page. 
13 /// </summary> 
14 protected void btnSubmit_Click(object sender, EventArgs e) 
15 { 
16 Response.Redirect(string.Format("Product.aspx?productname={0}", ddlProductName.SelectedValue)); 
17 } 

 1 protected void Page_Load(object sender, EventArgs e) 
 2 { 
 3 // Get product name. 
 4 string productName = Request.QueryString["productname"]; 
 5 
 6 // Binding data to data grid view control. 
 7 InitControl(this.GetData(productName)); 
 8 } 
 9 
10 /// <summary> 
11 /// Inits the control. 
12 /// </summary> 
13 /// <param name="ds">The dataset.</param> 
14 private void InitControl(DataSet ds) 
15 { 
16 dgvProduct.DataSource = ds; 
17 dgvProduct.DataBind(); 
18 } 
19 
20 /// <summary> 
21 /// Gets the data. 
22 /// </summary> 
23 /// <param name="productName">Name of the product.</param> 
24 /// <returns>Returns dataset</returns> 
25 private DataSet GetData(string productName) 
26 { 
27 // The query sql base on product name. 
28 string sql = 
29 string.Format( 
30 "SELECT Name, ProductNumber, SafetyStockLevel, ReorderPoint, StandardCost, DaysToManufacture " 
31 + "FROM Production.Product WHERE ProductNumber='{0}'", 
32 productName); 
33 
34 // Get data from table Production.Product. 
35 using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["SQLCONN"].ToString())) 
36 using (var com = new SqlCommand(sql, con)) 
37 { 
38 com.Connection.Open(); 
39 ////gdvData.DataSource = com.ExecuteReader(); 
40 ////gdvData.DataBind(); 
41 var ada = new SqlDataAdapter(com); 
42 var ds = new DataSet(); 
43 ada.Fill(ds); 
44 return ds; 
45 } 
46 } 

 1 /// <summary> 
 2 /// Gets vary cache based on custom string value. 
 3 /// </summary> 
 4 /// <param name="context">Http context.</param> 
 5 /// <param name="custom">custom string</param> 
 6 /// <returns></returns> 
 7 public override string GetVaryByCustomString(HttpContext context, string custom) 
 8 { 
 9 if (string.Equals(custom, "UserHostName", StringComparison.OrdinalIgnoreCase)) 
10 { 
11 // Indicates that the cache should be vary on user host name. 
12 return Context.Request.UserHostName; 
13 } 
14 return base.GetVaryByCustomString(context, custom); 
15 } 

1 <caching> 
2 <!-- Sets out put cache profile--> 
3 <outputCacheSettings> 
4 <outputCacheProfiles> 
5 <add name="ProductCacheProfile" duration="30"/> 
6 </outputCacheProfiles> 
7 </outputCacheSettings> 
8 </caching>现在，我们在页面中添加CacheProfile属性，并且设置为ProductCacheProfile，如下所示：

// Creates cache object Key1. 
Cache["Key1"] = "Cache Item 1"; 

// Makes Cache["Key2"] dependent on Cache["Key1"]. 
string[] dependencyKey = new string[1]; 
dependencyKey[0] = "Key1"; 

// Creates a CacheDependency object. 
CacheDependency dependency = new CacheDependency(null, dependencyKey); 

// Establishs dependency between cache Key1 and Key2. 
Cache.Insert("Key2", "Cache Item 2", dependency); 

/// <summary> 
/// Caches the data into text file. 
/// </summary> 
/// <param name="context">The http context</param> 
private void CacheData(HttpContext context) 
{ 
// Weibo API. 
string uri = context.Request.QueryString["api"] + "?" + 
"source=" + context.Request.QueryString["source"] + "&" + 
"count=" + context.Request.QueryString["count"]; 
HttpWebResponse response = this.GetWeibos(uri); 
if (null == response) 
{ 
throw new ArgumentNullException("Response is null"); 
} 
string jsonData; 
// Writes the reponse data into text file. 
using (var reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(response.CharacterSet))) 
{ 
jsonData = reader.ReadToEnd(); 
} 
string dataPath = context.Server.MapPath("weibo.json"); 
using (var writer = new StreamWriter(dataPath, false, Encoding.GetEncoding(response.CharacterSet))) 
{ 
writer.Write(jsonData); 
} 
// Establishs dependency between cache weibo and text file. 
// Sets cache expires after 2 minuntes. 
HttpRuntime.Cache.Insert("weibo", jsonData, Dep, Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes(2)); 
} 

/// <summary> 
/// Responses the weibo data. 
/// </summary> 
/// <param name="context">The http contex.</param> 
private void ResponseWeibo(HttpContext context) 
{ 
// Gets the weibo cache data. 
byte[] buf = Encoding.UTF8.GetBytes(HttpRuntime.Cache["weibo"].ToString()); 
// Writes the data into output stream. 
context.Response.OutputStream.Write(buf, 0, buf.Length); 
context.Response.OutputStream.Flush(); 
////context.Response.Close(); 
} 

// The function to get weibo data. 
loadWeibo: function() { 
$.ajax({ 
// Weibo API. 
url: "WeiboHandler.ashx", 
type: "GET", 
// NOTE: We get the data from same domain, 
// dataType is json. 
dataType: "json", 
data: { 
source: JQWeibo.appKey, 
count: JQWeibo.numWeibo 
}, 
// When the requet completed, then invokes success function. 
success: function(data, textStatus, xhr) { 
// Sets html structure. 
var html = 
'<div class="weibo">' + 
'<a href="http://weibo.com/DOMAIN" target="_blank">USER</a>' + 
'：WEIBO_TEXT<div class="time">AGO</div>'; 
// Appends weibos into html page. 
for (var i = 0; i < data.length; i++) { 
$(JQWeibo.appendTo).append( 
html.replace('WEIBO_TEXT', JQWeibo.ify.clean(data[i].text)) 
// Uses regex and declare DOMAIN as global, if found replace all. 
.replace(/DOMAIN/g, data[i].user.domain) 
.replace(/USER/g, data[i].user.screen_name) 
.replace('AGO', JQWeibo.timeAgo(data[i].created_at)) 
); 
} 
} 
}) 
}