Getting Started
  Introduction
  What is ASP.NET?
  Language Support

ASP.NET Web Forms
  Introducing Web Forms
  Working with Server Controls
  Applying Styles to Controls
  Server Control Form Validation
  Web Forms User Controls
  Data Binding Server Controls
  Server-Side Data Access
  Data Access and Customization
  Working with Business Objects
  Authoring Custom Controls
  Web Forms Controls Reference
  Web Forms Syntax Reference

ASP.NET Web Services
  Introducing Web Services
  Writing a Simple Web Service
  Web Service Type Marshalling
  Using Data in Web Services
  Using Objects and Intrinsics
  The WebService Behavior
  HTML Pattern Matching

ASP.NET Web Applications
  Application Overview
  Using the Global.asax File
  Managing Application State
  HttpHandlers and Factories

Cache Services
  Caching Overview
  Page Output Caching
  Page Fragment Caching
  Page Data Caching

Configuration
  Configuration Overview
  Configuration File Format
  Retrieving Configuration

Deployment
  Deploying Applications
  Using the Process Model
  Handling Errors

Security
  Security Overview
  Authentication & Authorization
  Windows-based Authentication
  Forms-based Authentication
  Authorizing Users and Roles
  User Account Impersonation
  Security and WebServices

Localization
  Internationalization Overview
  Setting Culture and Encoding
  Localizing ASP.NET Applications
  Working with Resource Files

Tracing
  Tracing Overview
  Trace Logging to Page Output
  Application-level Trace Logging

Debugging
  The SDK Debugger

Performance
  Performance Overview
  Performance Tuning Tips
  Measuring Performance

ASP to ASP.NET Migration
  Migration Overview
  Syntax and Semantics
  Language Compatibility
  COM Interoperability
  Transactions

Sample Applications
  A Personalized Portal
  An E-Commerce Storefront
  A Class Browser Application
  IBuySpy.com

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CompareValidator

For a detailed discussion of Web Forms validation, please see the Server Control Form Validation section of this QuickStart.

Working with CompareValidator

The CompareValidator control compares the value of one control to another, or to an explicit value in the control's ValueToCompare property.

Note: For the purpose of validation, a specific property on the control is designated as its "value". For more information, see the Server Control Form Validation section.

CompareValidator uses three key properties to perform its validation. ControlToValidate and ControlToCompare contain the values to compare. Operator defines the type of comparison to perform, for example, Equal or Not Equal. CompareValidator performs the validation by evaluating these properties as an expression, as shown in the following example.

<ControlToValidate> <Operator> <ControlToCompare> If the expression evaluates true, the validation result is valid.

The following sample illustrates using the CompareValidator control.

 
VB CompareValidator1.aspx

[Run Sample] | [View Source]

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