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New Message on MumbaiUserGroup
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From: lacisum
Message 5 in Discussion
Hi,
You can use server controls or HTML controls on a Web form. What�s the difference?
Basically, server controls are a superset of HTML controls and offer the advantages
described in Table Table . Server Controls vs. HTML Controls
Feature
Server controls
HTML controls
Server events
Trigger control-specific events on the server.
Can trigger only page- level events on server (postback).
State management
Data entered in a control is maintained across requests.
Data is not maintained; must be saved and restored using page-level scripts.
Adaptation
Automatically detect browser and adapt display as appropriate.
No automatic adaptation; must detect browser in code or write for least common
denominator.
Properties
The Microsoft .NET Framework provides a set of properties for each control. Properties
allow you to change the control�s appearance and behavior within server-side code.
HTML attributes only
So why use anything other than server controls? Because HTML controls have a
one-to-one correspondence with standard HTML elements, they provide more direct
control over what appears on a page. You use HTML controls for the following reasons:
Migration from earlier versions of Active Server Pages (ASP).
You can load an ASP application into Visual Studio and revise it gradually, rather
than rewrite it completely. Earlier versions of ASP supported only HTML elements, and
these elements become HTML controls when you load the project in Visual Studio .NET.
Not all controls require server-side events or state management.
This is particularly true when you�re doing data binding. Bound items are usually
refreshed from the data source with each request, so it�s more efficient not to
maintain state information for bound controls. This means that you can use HTML
controls or turn off state management for bound server controls. You have
complete control over what is rendered with HTML controls.
ASP.NET adjusts the appearance of server controls based on the browser making the
request. HTML controls are not adjusted, so you have direct control over their
appearance.
Server and HTML controls provide overlapping functionality. In general, it is easier
to work with server controls. Table lists the server controls and HTML controls by
programming task.
Table Server and HTML Controls by Programming Task
Task
Server controls
HTML controls
Display text
Label, TextBox, Literal
Label, Text Field, Text Area, Password Field
Display tables
Table, DataGrid
Table
Select from list
DropDownList, ListBox, DataList, Repeater
List Box, Dropdown
Perform commands
Button, LinkButton, ImageButton
Button, Reset Button, Submit Button
Set values
CheckBox, CheckBoxList, RadioButton, RadioButtonList
Checkbox, Radio Button
Display images
Image, ImageButton
Image
Navigation
Hyperlink
none (use <a> tags in text)
Group controls
Panel, Placeholder
Flow Layout, Grid Layout
Work with dates
Calendar
none
Display ads
AdRotator
none
Display horizontal rules
Literal
Horizontal Rule
Get filenames from client
none
File Field
Store data on page
(provided by state management)
Input Hidden
Validate data
RequiredFieldValidator, CompareValidator, RangeValidator, RegularExpressionValidator,
CustomValidator,ValidationSummary
none (use page- level scripts)
Regards
Raghu Chakkath
http://licasum.blogspot.com/
Microsoft India Community Star
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