CacheInfo.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="CacheInfo.aspx.cs" Inherits="CacheInfo" %>
<!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>Cache Info/Test Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<div>
<p style="text-align: center">
<asp:Label ID="Label4" runat="server" Text="Cache Info" Font-Size="Large" Font-Bold="true"></asp:Label></p>
<p>
<asp:Label ID="lblSysInfo" runat="server" EnableViewState="false"></asp:Label>
<asp:Label ID="lblInfo" runat="server" EnableViewState="false"></asp:Label>
</p>
<p>
<asp:Label ID="lblCache" runat="server" EnableViewState="false"></asp:Label><br />
<asp:GridView ID="gvCache" runat="server" AutoGenerateColumns="False" BorderWidth="1px"
BackColor="White" CellPadding="4" BorderStyle="Solid" BorderColor="#3366CC" Font-Size="Small"
AlternatingRowStyle-ForeColor="ActiveCaption" EnableViewState="false">
<HeaderStyle ForeColor="White" BackColor="#003399" HorizontalAlign="Left"></HeaderStyle>
<Columns>
<asp:TemplateField ItemStyle-Width="20" ItemStyle-Font-Size="X-Small">
<ItemTemplate>
<%# Container.DataItemIndex + 1 %>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="Key" DataField="Key" ReadOnly="true" ItemStyle-Width="420px"></asp:BoundField>
<asp:BoundField HeaderText="Type" DataField="Type" ReadOnly="true" ItemStyle-Width="180px"></asp:BoundField>
<asp:BoundField HeaderText="Note" DataField="Note" ReadOnly="true" ItemStyle-Width="180px"></asp:BoundField>
</Columns>
<EmptyDataTemplate>
<asp:Label ID="lblEmptyMessage" runat="server" Text="No feature found."></asp:Label>
</EmptyDataTemplate>
</asp:GridView>
</p>
<p>
<asp:Label ID="Label3" runat="server" Text="Add cache with size in MB"></asp:Label>
<asp:DropDownList ID="ddlCacheSize" runat="server" AutoPostBack="false">
<asp:ListItem>50</asp:ListItem>
<asp:ListItem>100</asp:ListItem>
<asp:ListItem>200</asp:ListItem>
<asp:ListItem>300</asp:ListItem>
<asp:ListItem>400</asp:ListItem>
<asp:ListItem>500</asp:ListItem>
<asp:ListItem>600</asp:ListItem>
<asp:ListItem>700</asp:ListItem>
<asp:ListItem>800</asp:ListItem>
<asp:ListItem>900</asp:ListItem>
<asp:ListItem>1000</asp:ListItem>
<asp:ListItem>2000</asp:ListItem>
<asp:ListItem>3000</asp:ListItem>
<asp:ListItem>4000</asp:ListItem>
<asp:ListItem>5000</asp:ListItem>
<asp:ListItem>6000</asp:ListItem>
<asp:ListItem>7000</asp:ListItem>
<asp:ListItem>8000</asp:ListItem>
<asp:ListItem>9000</asp:ListItem>
<asp:ListItem>10000</asp:ListItem>
</asp:DropDownList>
<asp:Label ID="Label1" runat="server" Text="Cache Expire in seconds"></asp:Label>
<asp:DropDownList ID="ddlExpir" runat="server" AutoPostBack="false">
<asp:ListItem>10</asp:ListItem>
<asp:ListItem>20</asp:ListItem>
<asp:ListItem>30</asp:ListItem>
<asp:ListItem>40</asp:ListItem>
<asp:ListItem>50</asp:ListItem>
<asp:ListItem>60</asp:ListItem>
<asp:ListItem>70</asp:ListItem>
<asp:ListItem>80</asp:ListItem>
<asp:ListItem>90</asp:ListItem>
<asp:ListItem>100</asp:ListItem>
<asp:ListItem>110</asp:ListItem>
<asp:ListItem>120</asp:ListItem>
<asp:ListItem>180</asp:ListItem>
</asp:DropDownList>
<asp:Button ID="btnAddCache" runat="server" Text="Add Test Cache" OnClick="btnAddCache_click" />
</p>
</div>
</div>
</form>
</body>
</html>
CacheInfo.aspx.cs:
using System;
using System.Collections;
using System.Collections.Generic;
using System.Web;
using System.Web.UI.WebControls;
using System.Web.Caching;
using System.Text;
using System.Data;
public partial class CacheInfo : System.Web.UI.Page
{
protected class CacheInfoItem
{
public string Key { get; set; }
public string Type { get; set; }
public string Note { get; set; }
public CacheInfoItem(string key, string type)
{
Key = key;
Type = type;
}
}
protected class CacheData
{
public Byte[] Data { get; set; }
public CacheData(int totalBytes)
{
Data = new Byte[totalBytes];
for (int i = 0; i < totalBytes; i += 123)
{
Data[i] = (byte)(i % 256);
}
}
}
protected string TestCacheKey = "Cache_Test_Key";
protected void btnAddCache_click(object sender, EventArgs e)
{
try
{
int totalBytes = int.Parse(ddlCacheSize.SelectedValue) * 1024 * 1024;
CacheData data = new CacheData(totalBytes);
int seconds = int.Parse(ddlExpir.SelectedValue);
HttpRuntime.Cache.Insert(TestCacheKey, data, null, DateTime.Now.AddSeconds(seconds), Cache.NoSlidingExpiration);
lblInfo.Text = "Successfully added test data to cache (expire in " + seconds + " seconds).";
}
catch (Exception ex)
{
lblInfo.Text = "Insert Cache error: " + ex.Message;
}
}
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
List<CacheInfoItem> cacheItems = new List<CacheInfoItem>();
// Populate System Info
System.Diagnostics.Process currentProcess = System.Diagnostics.Process.GetCurrentProcess();
long totalMemBytes = currentProcess.WorkingSet64;
DateTime startTime = currentProcess.StartTime;
Cache cache = HttpRuntime.Cache;
StringBuilder sbInfo = new StringBuilder();
sbInfo.Append(Server.MachineName + " " + currentProcess.MachineName + " ");
sbInfo.Append(currentProcess.ProcessName + " start time: " + startTime.ToString("yyy-MM-dd HH:mm") + " ");
sbInfo.Append("Process memory usage (MB): " + totalMemBytes / (1024 * 1024) + "<br>");
lblSysInfo.Text = sbInfo.ToString();
// Populate Cache Info
sbInfo = new StringBuilder();
if (cache != null)
{
foreach (DictionaryEntry item in cache)
{
try
{
Type type = item.Value.GetType();
string typeInfo = type.ToString();
CacheInfoItem ci = new CacheInfoItem(item.Key.ToString(), typeInfo);
cacheItems.Add(ci);
if (type == Type.GetType("System.DateTime"))
{
ci.Note = "Time: " + Convert.ToDateTime(HttpRuntime.Cache[item.Key.ToString()]).ToString("yyy-MM-dd HH:mm");
}
else if (type == Type.GetType("System.String"))
{
ci.Note = "Value: " + cache[item.Key.ToString()].ToString();
}
else
{
Object obj = cache[item.Key.ToString()];
if (obj != null)
{
if (obj is IList)
{
ci.Note = "Item Count: " + ((IList)obj).Count.ToString();
}
else if (obj is DataSet && (DataSet)obj != null && ((DataSet)obj).Tables[0] != null)
{
ci.Note = "Item Count: " + ((DataSet)obj).Tables[0].Rows.Count.ToString();
}
else if (obj is DataTable && (DataTable)obj != null)
{
ci.Note = "Item Count: " + ((DataTable)obj).Rows.Count.ToString();
}
}
}
}
catch (Exception ex)
{
sbInfo.Append("Get cache info error for " + item.Key + ":" + ex.Message + "<br>");
throw;
}
}
}
lblInfo.Text += sbInfo.ToString();
lblCache.Text = "Total Cache item count: " + cacheItems.Count.ToString();
cacheItems.Sort((i, j) => i.Key.CompareTo(j.Key));
gvCache.DataSource = cacheItems;
gvCache.DataBind();
}
}
