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Friday, June 19, 2015
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How to access application setting tag of web.config file in asp.net

7:21 PMFriday, June 19, 2015
Today i am writing ado.net code in code behind file, On that time i notice that if i take my connection string in the web.config file then we can access it easily. But how? So i have search in msdn library to access the web.config file then i found ConfigurationManager class which is available in System.Configuration Namespace. Through this class we can get all elements of web.config file. Lets take a simple example.




Web.config file

<appSettings>
    <add key="jacob" value="My Name"/>
   
  </appSettings>

Source Code

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

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
    </div>
    <asp:Button ID="Button1" runat="server" Height="57px" OnClick="Button1_Click" Text="Get Data from Application Setting" Width="232px" />
    </form>
</body>
</html>

Code Behind Code
using System.Configuration;
 protected void Button1_Click(object sender, EventArgs e)
    {
        String getname = ConfigurationManager.AppSettings["jacob"].ToString();
        Label1.Text = getname;
    }

Here we access AppSettings By the configurationManager class. You can access all property or elements from web.config file by using this class. Now the simple syntax to access them.
ConfigurationManager.elementName
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