Introducing Server Controls

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Server Controls

M.SARULATHA

Assistant Professor,

Dept of CA,JJC

 

 Introduction

Server controls are server-recognized tags. There are three types of server controls.

HTML Server Controls - Traditional HTML tags

Web Server Controls - new ASP. NET tags

Authentication Server Controls - Installation Verification

HTML Server controls

    ASP.NET provides functionality and HTML Server controls on the server side; a program with a set of shared controls is called HTML Controls.

    These controls are grouped together in a Visual Studio Tool on the HTML Control tab. Directing controls is like HTML control.

    These  are basically the first HTML controls but are developed to enable server processing.

    HTML objects in ASP. NET files, by default, are treated as text. To get these things organized, add a runat = "server" icon to the HTML element. This attribute indicates that the object should be treated as a server control.Note:

    All HTML server controls must be within the <form> tag with runat = "server" symbols. The runat = "server" feature indicates that the form must be processed on the server. It also shows that closed controls can be accessed via server scripts.

    The System.Web.UI.HtmlControls.HtmlControl section was a component of all common structures. HTML server controls are available in this section.

For example, consider HTML input controls:

<input type="text" size="40"> 

It could be converted to the server control by using runat and id.

<input type="text" id="testtext" size="40" runat="server>

Web Server Controls

    Web server controls are a special ASP. NET tags are server-recognized.

    Like HTML server management, Web server controls are created on the server and require runat = "server" attribute to work.

    However, Web server controls do not actually map to any existing HTML objects and may represent more complex objects.

    Mostly all Web Server management is an asset in the standard class, i.e. the WebControl section defined in System.Web.UI.WebControls namespace.

Syntax for building Web server controls:

<asp:Control_name id="some_id" runat="server"/>

 Authentication Server Controls(Validation Controls)

    After creating a web form, you should ensure that the form fields for the form objects such as login name and password are not left blank; the data entered is correct and within a specified range. Verification is a method of checking (note) that the user has entered the appropriate values ​​in the input fields.

    Authentication server control is used to verify input control data. If the data does not pass verification, it will display an error message to the user.

    In ASP. NET can use ASP. NET Authentication controls while creating a form and defining what an ASP is. The .NET Authentication controls you want to use and which server you want to bind to.

    Verification controls are taken from the standard section and share resources and methods. You just have to drag and drop ASP. NET authentication controls in web form and write one line of code to show its effectiveness.

    This reduces developer time in writing JavaScript for each type of authentication. Moreover, with ASP. NET Authentication controls if any incorrect data is installed the browser itself detects the error on the client side and shows the error without asking the server. This is another advantage because it reduces server load.

Syntax for Creating a Validation server control:

<asp:Control_name id="some_id" runat="server"/>

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