Validation Control

Question

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

Anuja Pawar · Answer

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" />

Satyapriya Nayak · Answer

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 void Button_Click(Object Src, EventArgs e) { if (Page.IsValid) { lblError.Text = "Page is Valid!"; } else { lblError.Text = "Page is InValid!" ; } } 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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