In this article I will explain with an example, how to read (get) AppSettings Key Value from Web.Config in HTML Markup of ASP.Net page using C# and VB.Net.
In the HTML Markup of ASPX Page, the AppSetting values will be read from Web.Config file using Server-Side code blocks (<% %>).
Adding System.Configuration reference
The very first thing you need to do is to add reference of the System.Configuration Assembly to the project in the following way.
1. Right click on the project and click Add Reference option from the Context Menu.
![Read (Get) AppSettings Key Value from Web.Config in HTML Markup of ASP.Net page]()
2. From the Add Reference dialog box, click on .Net Tab and look for System.Configuration assembly. Once you find it simply select and click OK.
![Read (Get) AppSettings Key Value from Web.Config in HTML Markup of ASP.Net page]()
3. Once the reference is added, it will be shown in the References folder of the Solution Explorer.
![Read (Get) AppSettings Key Value from Web.Config in HTML Markup of ASP.Net page]()
Reading AppSettings Key Value from Web.Config in HTML Markup of ASP.Net page
Once the reference is added, you can read the AppSettings value in ASPX page from the Web.Config file in the following way.
C#
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<span><%=System.Configuration.ConfigurationManager.AppSettings["Name"]%></span>
</form>
</body>
</html>
VB.Net
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<span><%=System.Configuration.ConfigurationManager.AppSettings("Name")%></span>
</form>
</body>
</html>
Note: Server-Side code blocks (<% %>) cannot be used with ASP.Net controls like TextBox, Label, etc. Only exception is that if the TextBox or Label control is inside a DataBound control like GridView, Repeater, etc.
