asp.net application static静态变量用法

asp教程.net application static静态变量用法

File: Global.asax

<%@ Application Language="C#" ClassName="Global" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Collections.Generic" %>
<script runat="server">

    private static string[] fileList;
    public static string[] FileList
    {
        get
        {
            if (fileList == null)
            {
                fileList = Directory.GetFiles(HttpContext.Current.Request.PhysicalApplicationPath);
            }
            return fileList;
        }
    }

    private static Dictionary<string, string> metadata = new Dictionary<string, string>();
    public void AddMetadata(string key, string value)
    {
        lock (metadata)
        {
            metadata[key] = value;
        }
    }
    public string GetMetadata(string key)
    {
        lock (metadata)
        {
            return metadata[key];
        }
    }
</script>

File: Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="StaticApplicationVariables" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="lblInfo" runat="server"></asp:Label>

    </div>
    </form>
</body>
</html>

File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;
using ASP;

public partial class StaticApplicationVariables : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    StringBuilder builder = new StringBuilder();
    foreach (string file in Global.FileList)
    {
      builder.Append(file + "<br />");
    }
    lblInfo.Text = builder.ToString();
    }
}

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