Understanding ASP.NET Validation Controls
Therefore, in ASP.NET you can use ASP.NET Validation Controls while creating the form and specify what ASP.NET Validation Controls you want to use and to which server control you want bind this. ASP.NET Validation Controls are derived from a common base class and share a common set of properties and methods. You just have to drag and drop the ASP.NET Validation Control in the web form and write one line of code to describe its functionality.
The five types of ASP.NET Validation Controls in ASP.NET Framework include:
RequiredField Validation control: prompts message if any input field is left blank. This validation control can also be used to prompt message to the user if he or she has left any input field with its default value.
Range Validation control: Prompts message to the user, if the data entered in the input field is not within the range of the values specified by the Maximum and Minimum properties of the validation control.
Comparison Validation control: Allows the user to compare two values and check for comparisons such as equality, greater-than, less-than etc. In addition you can check whether the data entered in the input field is of the data type as specified by you.
RegularExpression Validation control: Allows you to validate if the format of a certain input field is correct or not. You can check the validation of the commonly performed formats such as social security numbers, e-mail addresses, telephone numbers, and postal code.
Custom Validation control: Allows you to define your own condition for validating the data in the input fields. Two validation functions can be performed using Custom Validation control: first on the server-side and second on the client-side. These functions contain logic defined by you to validate the input fields. These functions returns the True value and False value, if the condition you specified is correct or not respectively.
If the controls
value does not validate to what you have specified in the validation control
tag, the web form displays an error message. Moreover, you can customize
the format of the error message by using the control properties such as
BackColor, BorderStyle, and BorderWidth. In addition, you can use Cascading
Style Sheet (CSS) to format an error message.
to our mailing list and receive new articles
: We never rent, trade, or sell my email lists to
Visit .NET Programming Tutorial Homepage
| Can you call a constructor from another constructor of the Class in .NET? | Difference between Response.Output.Write() method and Response.Write() method in .NET | How do you establish multiple inheritance in C#? | How do you introduce a ReadOnly property in C#? | How do you perform constructor overloading in C#? | Is catch(Exception) recommended to be used in .NET? | What are the different access modifiers available in C#? | What are the different ways of overloading in C#? | What are the members of stringbuilder class in C#? | What is Multicast Delegate? Explain it with example in C# | What is the difference between abstract class and interface in .NET? | What is the difference between Clone and CopyTo methods in .NET | What is the difference between const and readonly in .NET | What is the difference between directcast and ctype in .NET? | What is the difference between out and ref parameters in .NET | What is the difference between public assembly and private assembly in .NET | What is the difference between strong typing and weak typing in .NET? | What is the difference between Trace and Debug in .NET | What is the need for Abstract Factory Pattern in C#? | What is the need for Adapter Pattern in C# |