Chapter 3. Using the Validation Controls

• Listing 3.1 - OrderForm.aspx
  Illustrates how to use the validation controls.
• Listing 3.2 - ValidationImage.aspx
  Illustrates how you can display an image when there is a validation error.
• Listing 3.3 - ShowSetFocusOnError.aspx
  Illustrates how you can shift focus to the control associated with a validation error automatically.
• Listing 3.4 - ShowValidators.aspx
  Illustrates how you can take advantage of the Page Validators collection to highlight controls associated with a validation error.
• Listing 3.5 - ShowValidationGroups.aspx
  Illustrates how you can create multiple forms on the same pae by taking advantage of validation groups.
• Listing 3.6 - ShowDisableValidation.aspx
  Illustrates how you can create a Cancel button.
• Listing 3.7 - ShowRequiredFieldValidator.aspx
  Illustrates how to use the ASP.NET RequiredFieldValidator control to validate whether a form field has a value.
• Listing 3.8 - ShowInitialValue.aspx
  Illustrates how to display a default value when using the RequiredFieldValidator control.
• Listing 3.9 - ShowRangeValidator.aspx
  Illustrates how to use the ASP.NET RangeValidator control to validate whether the value of a form field falls between a minimum and maximum value.
• Listing 3.10 - ShowDataTypeCheck.aspx
  Illustrates how to use the ASP.NET CompareValidator validation control to validate whether the value of a form field is of the right data type.
• Listing 3.11 - ShowFixedValue.aspx
  Illustrates how to use the ASP.NET CompareValidator validation control to compare the value of a form field against a fixed value.
• Listing 3.12 - ShowCompareValues.aspx
  Illustrates how to use the ASP.NET CompareValidator validation control to compare the value of one form field against another.
• Listing 3.13 - ShowRegularExpressionValidator.aspx
  Illustrates how to use the ASP.NET RegularExpressionValidator control to validate a form field against a regular expression string pattern.
• Listing 3.14 - ShowCustomValidator.aspx
  Illustrates how to use the ASP.NET CustomValidator control to perform custom form field validation.
• Listing 3.15 - ShowCustomValidatorJS.aspx
  Illustrates how you can associate client-side JavaScript code with a CustomValidator control.
• Listing 3.16 - ShowValidateEmptyText.aspx
  Illustrates how you can use a CustomValidator to validate a form field even when the form field is blank.
• Listing 3.17 - TimedTest.aspx
  Illustrates how you can use the CustomValidator control even when the control is not associated with a particular form field.
• Listing 3.18 - ShowValidationSummary.aspx
  Illustrates how to use the ASP.NET ValidationSummary control to display a summary of every validation error message on a page.
• Listing 3.19 - ShowSummaryPopup.aspx
  Illustrates how you can display validation error messages in a JavaScript alert.
• Listing 3.20 - LengthValidator.cs, Listing 3.21 - ShowLengthValidator.aspx
  Illustrates how you can create a custom validation control that validates the length of a form field.
• Listing 3.22 - AjaxValidator.cs, Listing 3.23 - AjaxValidator.js, Listing 3.24 - ShowAjaxValidator.aspx
  Illustrates how you can create a custom validation control that uses Ajax to execute a custom server-side validation function.