Get and set application settings : WebConfigurationManager « Configuration « ASP.NET Tutorial






  1. ASP.NET Tutorial
  2. Configuration
  3. WebConfigurationManager
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Welcome_aspx" %>

<!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="lblSiteName" runat="server" Font-Bold="True" Font-Size="Large"></asp:Label>
      
        <asp:Label id="lblWelcome" runat="server" Font-Names="Tahoma"></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.Web.Configuration;

public partial class Welcome_aspx : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
    Configuration config = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);
    
    lblSiteName.Text = config.AppSettings.Settings["websiteName"].Value;
    lblWelcome.Text = config.AppSettings.Settings["welcomeMessage"].Value;

    if (config.AppSettings.Settings["welcomeMessage"].Value.Length > 15)
    {
      config.AppSettings.Settings["welcomeMessage"].Value = "Welcome, again.";
    }
    else
    {
      config.AppSettings.Settings["welcomeMessage"].Value = "Welcome, friend.";
    }
    config.Save();
    
  }

}

File: Web.config

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
  <system.web>
  <appSettings>
    <add key="websiteName" value="My New Website" />
    <add key="welcomeMessage" value="Welcome, again." />
  </appSettings>


</configuration>








16.32.WebConfigurationManager
16.32.1.Using the Configuration API
16.32.2.Get and set application settings
16.32.3.Read configuration
16.32.4.Retrieving a configuration setting with the GetSection() and GetWebApplicationSection() methods.
16.32.5.Opening a Configuration File
16.32.6.Update Configuration