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Monday, 18 January 2016

SIMILARITY AND DIFFERENCE BETWEEN LABEL AND LITERAL CONTROL


Today in Engineer's World, we are discussing a topic of C# in very easy way. Posted By- +Manish Kumar Gautam +LIVE VIAR  +ASP.NET SOLUTIONS

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SIMILARITY AND DIFFERENCE BETWEEN LABEL AND LITERAL CONTROL
  
D5. To encode text in Label control use Server.HtmlEncode() but in Literal use the mode property.
For ex- 

Practical Implementation: -

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

<!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></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <%-- Server.Encode is used to encode string in Label control --%>
        <asp:Label ID="Label1" runat="server">
        <%=Server.HtmlEncode("<script>alert('Label Encode: Danger in code')</script>") %>
        </asp:Label>
        <br />
        <br />
        <%-- mode = Encode is used to encode string in Literal control --%>
        <asp:Literal ID="Literal1" runat="server" Mode="Encode" Text="<script>alert('Danger in code')</script>">
        </asp:Literal>
    </div>
    </form>
</body>
</html>

D6. The hierarchy of both controls is also a little bit different.

Label
Literal
(i) System.Object
(i) System.Object
(ii) Control
(ii) Control
(iii) WebControl
(iii) Literal
(iv) Label


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For ex-
You can check the flow of control as
Step-1 Go to the code behind of WebForm.
Step-2 In the page load write Label.

Practical Implementation: -

using System;
using System.Web.UI.WebControls;

public partial class Literal_control : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Label Label2 = new Label();
        Literal Literal2 = new Literal();
    }

  
Step-3 Right-click on the Label and Go to Definition. You can see the Label is inheriting from the WebControl.
Step-4 If you Right-click the WebControl you can see that it is inheriting from Control.
Step-5 If you Right-click the Control you can see that it is inheriting from the various thing which is directly or indirectly part of System.Object.

For any query, comment us below.

 
Related Questions: -


Q-1 How can a Label control differ than a Literal control?
Ans- Label control's final HTML code has an <span>…</span> HTML tag whereas, Literal control's final HTML code contains only text, which is not surrounded by any HTML tag.

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