Validation Control

Rajesh Kumar

14y4.2k.NET

Hi..

I am doing work in asp.net and use regular expression validation control give definition and its properties for the particular webpage?

2 Replies

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Anuja Pawar14y ago
The RegularExpressionValidator control is used to ensure that an input value matches a specified pattern.
Note: Both server- and client-side validation are performed unless the browser does not support client-side validation or the EnableClientScript property is set to false.
Try this simple example

Enter a US zip code:

ControlToValidate="txtbox1"
ValidationExpression="\d{5}"
EnableClientScript="false"
ErrorMessage="The zip code must be 5 numeric digits!"
runat="server" />

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Satyapriya Nayak14y ago
Hi Rajesh,

The RegularExpressionValidator Control checks the data entered by the user matches a pattern defined by a regular expression.

The important property of the RegularExpressionValidator Control is :

ValidationExpression : The regular expression defines a pattern that the input data must match to be valid.

we will see how we can Validate Email ID and Web site URL using RegularExpressionValidator Control

Untitled Page

Text="Email ID" runat="server" />

MaxLength="50" runat="server" />
ControlToValidate="txtEmail"
Text="*" ErrorMessage="Email is Missing"
runat="server" />

ControlToValidate="txtEmail"
Text="Invalid Email Address"
ValidationExpression="^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]
{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$" runat="server" />

ID="lblError"
EnableViewState="False"
runat="Server" />

Text="Website" runat="server" />

MaxLength="100" runat="server" />

ControlToValidate="txtWebsite"
Text="*"
ErrorMessage="Website is Missing" runat="server" />
ID="RegularExpressionValidator2"
ControlToValidate="txtWebsite"
Text="Invalid URL"
ValidationExpression="http://\S+\.\S+" runat="server" />

Text="Add!"
OnClick="Button_Click"
runat="Server" />

Thanks
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