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_\-\.]+)@(($$[0-9]{13}\.[0-9]{13}\.[0-9] {13}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{24}|[0-9]{13})($$?)$ 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