| This section lists the detailed properties for each of the ASP.NET validation server controls. These controls are used to provide user input validation for other server controls. Common Validation Server Control Properties Table C.55 lists properties and methods that are common to all validation controls inherited from the System.Web.UI.WebControls.BaseValidator class except the ValidationSummary control. Table C.55. Properties and Methods of the BaseValidator Class | Property | Description | | ControlToValidate | Specifies the control that should be validated. | | Display | The display behavior for the validation control. Can be one of the following: None The error message is not displayed. Static If validation fails, the control's error message is displayed where the control resides in the page layout. The control will take up space in the layout even if the error message is not visible. Dynamic Error messages are displayed when validation fails, and the control doesn't take up any space in the page layout if a message is not displayed. | | EnableClientScript | Specifies whether client-side script will be generated to handle validation client-side via DHTML. Note that client-side script must be created manually. | | Enabled | Indicates if the validation control is enabled. | | ErrorMessage | The message to display if the input is not valid. | | ForeColor | Sets the font color of the error message. | | IsValid | Specifies whether the input in the control specified by ControlToValidate is valid. | | Method | Description | | GetValidationProperty | Retrieves the validation property of a control. | | Validate | Determines whether the watched over server control's content is valid, and updates the IsValid property. | The Validation Server Controls The following section lists the details of each validation control. Note that the ControlToValidate property must be set to a valid server control for these controls to function properly. CompareValidator This control compares values in a control to another value, or another control. Table C.56 lists the properties of this server control. Table C.56. Properties of the CompareValidator Control | Property | Description | | ControlToCompare | The ID of the control to compare values with. | | Operator | The comparison to make. Can be DataTypeCheck, Equal, GreaterThan, GreaterThanEqual, LessThan, LessThanEqual, or NotEqual. | | ValueToCompare | A constant value to compare against. | CustomValidator This control validates controls' contents via a server-side or client-side validation routine, created by you. Table C.57 lists the properties and events of this server control. Table C.57. Properties and Events of the CustomValidator Control | Property | Description | | ClientValidationFunction | The client-side function that should be used to validate the specified control. | | Event | Description | | ServerValidate | Occurs during a form post; indicates which server-side method will be used to validate the control. | RangeValidator This control compares values in a control against a possible range of values. Table C.58 lists the properties of this server control. Table C.58. Properties of the RangeValidator Control | Property | Description | | MaximumValue | The maximum allowed value for the watched over control's input. Can be a string or number. | | MinimumValue | The minimum allowed value for the watched over control's input. Can be a string or number. | RegularExpressionValidator This control compares values in a control to a regular expression. Table C.59 lists the properties of this server control. Table C.59. Properties of the RegularExpressionValidator Control | Property | Description | | ValidationExpression | A regular expression to validate the watched-over control's content against. | RequiredFieldValidator This control ensures that content is entered into a server control; it is not left blank. Table C.60 lists the properties of this server control. Table C.60. Properties of the RequiredFieldValidator Control | Property | Description | | InitialValue | The initial value associated with the watched-over control. | ValidationSummary This control provides a central location for all other validation controls to display their error messages. It can be used in conjunction with the control's in-line error messages. Table C.61 lists the properties of this server control. Table C.61. Properties of the ValidationSummary Control | Property | Description | | DisplayMode | The display behavior of this control. Can be BulletList, List, or SingleParagraph. | | EnableClientScript | Indicates whether client-side validation should be used. | | ForeColor | The font color to display the error messages. | | HeaderText | The header displayed at the top of this control. | | ShowMessageBox | Indicates whether the error messages should be shown in a pop-up message box. | | ShowSummary | Indicates whether the validation summary is displayed inline. | | 
