Different Types of Validation Controls Available in ASP.Net (1)

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Different Types of Validation Controls Available
in ASP.Net Data validation is a critical stage in
web application development. It ensures the
integrity of the system by verifying whether the
entered data is comprehensive and accurate or
not.  In other words, APS.Net validation controls
allow developers to validate the user input
before submitting it to the server. By doing so,
they can control the captured data and check
whether it meets the specific requirements. There
are different validation control types, each
serving a unique purpose in validating user
input. They can be utilized in various scenarios,
from validating strings and dates to numbers and
emails. In this blog post, we will discuss
different validation control types in
ASP.Net, their functionality, and how to use them
efficiently in your web application. By the end
of this edit, you'll be equipped with the
necessary information and skills to enhance your
user experience and application integrity through
validation controls. How Does ASP.Net Validation
Control Work? Powered by Microsoft, ASP.Net
offers powerful and flexible control tools to
validate user input in web applications. These
controls provide automatic server-side and
client-side mechanisms to verify whether the data
is correct and meets the rules set by developers
across different layers of the app. Once the
data is submitted through the web form, ASP.Net
validation control checks the user's input
against their validation rules. When the
validation rules are not met, an error message
is displayed. This occurs on the client side
to reduce the round-trips to the server and
improve the user's experience. Then, the data
is submitted to the server where the server-side
validation occurs. At this point, the ASP.Net
validation controls generate server-side code to
validate user input. This is necessary as a
malicious user can easily manipulate scripts and
bypass the client-side control.
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ASP.Net can also perform cross-page validation
control, which operates when the user input is
validated on one page and the results are
displayed on another. Cross-page validation helps
developers confirm their user input across
different pages of the application. Validation
Control Types in ASP.Net ASP.Net offers multiple
validation controls, allowing developers to
choose from various powerful tools designed to
meet their specific validation requirements. The
following are the 6 validation control types
available on ASP.Net, and their generic
syntax. RequiredFieldValidator Control The
RequiredFieldValidator is a fundamental
validation control in ASP.Net that allows
developers to check if user input is null or
empty. This control is typically used for fields
that require mandatory input, such as name, email
address, and phone number. The
RequiredFieldValidator is a crucial component to
ensure that accurate and reliable data is
captured and avoid null-reference exceptions
during further data processing. Compared to
other controls, the RequiredFieldValidator is
relatively simple to work with. It requires
specifying the ControlToValidate property,
which identifies the tool for validation. Generi
c syntax ltaspRequiredFieldValidator
ID"UniqueId" runat"server" ControlToValidate "U
niqueControlId" ErrorMessage"ErrorMessageForFailu
re" InitialValue "aPlaceholderValue"gt
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lt/aspRequiredFieldValidatorgt CompaíeValidatoí
Contíol lhis ASP.Net validation contíol type
helps compaíe the useí input in sepaíate input
fields. lhe CampaíeValidatoí contíol compaíes
data such as email addíesses, passwoíds, oí any
otheí infoímation that should match acíoss
multiple fields. Moíeoveí, it helps guaíantee
data integíity and ensuíe oveíall data
consistency. lo opeíate this contíol, one needs
to specify the ContíolloCompaíe
píopeíty. Geneíic syntax ltaspCompareValidator
ID"UniqueId" runat"server" ControlToValidate"Un
iqueControlId" ErrorMessage"ErrorMessageForFailur
e" Type"string" ValueToCompareanyFixedValue
OperatorEqualgt lt/aspCompareValidatorgt Rang
eValidatoí Contíol Developeís use the
RangeValidatoí contíol to veíify whetheí a value
such as age validation, píice íange validation,
oí otheí useí input is within a specified
íange. Using this ASP.Net contíol, developeís
can píevent invalid data fíom íeaching the
backend, which ultimately enhances the data
integíity and consistency acíoss the web
application. lhe RangeValidatoí contíol íequiíes
specifying the minimum and maximum values with
the MinimumValue and MaximumValue píopeíties.
Developeís can also use the lype píopeíty to
deteímine the type of data in the input field,
including Stíing, Integeí, and Double.
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Geneíic syntax ltaspRangeValidator
ID"UniqueId" runat"server" ControlToValidate"Un
iqueControlId" ErrorMessage"ErrorMessageForFailur
e" Type"Integer" MinimumValue10
MaximumValue500gt lt/aspRangeValidatorgt Regu
laíExpíessionValidatoí Contíol lhe ASP.Net
RegulaíExpíessionValidatoí contíol oí Regex
allows developeís to ensuíe that the useí input
matches a specified foímat. lhis is especially
cíucial foí scenaíios with multiple useí inputs
such as phone numbeís, email addíesses, and zip
codes, that can lead to eííoís in the next
stages. Additionally, Regex can píovide useís
with immediate feedback when enteíing data,
which helps impíove useí expeíience and simplify
the foím- filling píocess. lhe input text is
matched against the patteín specified by the
ValidationExpíession píopeíty. Geneíic
syntax ltaspRegularExpressionValidator
ID"someUniqueId" runat"server"
ControlToValidate "someUniqueControlId" ErrorMess
age"ErrorToDisplayOnValidationFailure"
ValidationExpressionaRegexPatterngt lt/aspRegu
larExpressionValidatorgt CustomValidatoí Contíol
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lhe CustomValidatoí contíol allows developeís to
customize the validation code to theií specific
useí inputs. lhis is píimaíily useful when the
developeís need specific business logic in
validation which cannot be implemented by the
built-in contíols. lhis contíol can opeíate both
client-side and seíveí-side validation. Howeveí,
the seíveí-side appíoach is often píefeííed as it
is moíe poweíful. lhe CustomValidatoí contíol
uses the ClientValidationFunction as well as the
SeíveíValidate píopeíties to identify the contíol
foí validation and specify the method used in
the validation logic. Geneíic syntax ltaspCusto
mValidator ID"UniqueId" runat"server" ControlToV
alidate"UniqueControlId" ErrorMessage"ErrorMessa
geForFailure" ClientValidationFunction"
functionName"gt lt/aspCustomValidatorgt Validati
on Summaíy Contíol lhe ValidationSummaíy contíol
is an ASP.Net tool that summaíizes eííoís
geneíated duíing foím submission. lhis can be
displayed in seveíal foímats, including a
bulleted list oí detailed descíiption with
summaíy text. lhis contíol píovides developeís
with the ability to customize the oveíall design
and enhance the useí expeíience by setting
píopeíties such as Headeílext, DisplayMode, and
CssClass, to name a few. lo identify and coííect
eííoís, set the ShowMessageBox píopeíty to líue
to display a message box of eííoís. Geneíic
syntax
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ltaspValidationSummary ID"ValidationSummaryContro
l" runat"server" DisplayModeBulletList
ShowSummarytrue HeaderText" List of
Errors"/gt Final Words ASP.Net validation
controls are essential and flexible tools for web
application developers who want to deliver a
secure and reliable user experience. Using
customizable properties and straightforward
implementation, these controls help provide
clear and concise error feedback and promote
effective data management. Boasting over 10
years of experience in the industry, One
Technologies' expert team is well-versed in
using various ASP.Net validation controls to
ensure that your web application runs
seamlessly. Our .NET development company takes
great pride in its client-centric approach. We
work hand-in-hand with our clients to understand
their unique business requirements and deliver
efficient solutions that meet and exceed
their needs. Hire .NET developers, and let us
build and optimize your web application with the
best practices.