# ASP.NET RangeValidator Control

Validation Server Controls

## Definition and Usage

The RangeValidator control is used to check that the user enters an input value that falls between two values. It is possible to check ranges within numbers, dates, and characters.

Note: The validation will not fail if the input control is empty. Use the RequiredFieldValidator control to make the field required.

Note: The validation will not fail if the input value cannot be converted to the data type specified. Use the CompareValidator control, with its Operator property set to ValidationCompareOperator.DataTypeCheck, to verify the data type of the input value.

## Properties

Property | Description
--- | ---
BackColor | The background color of the RangeValidator control
ControlToValidate | The id of the control to validate

Display

The display behavior for the validation control. Legal values are:

- None (the control is not displayed. Used to show the error message only in the ValidationSummary control)
- Static (the control displays an error message if validation fails. Space is reserved on the page for the message even if the input passes validation.
- Dynamic (the control displays an error message if validation fails. Space is not reserved on the page for the message if the input passes validation

EnableClientScript | A Boolean value that specifies whether client-side validation is enabled or not
Enabled | A Boolean value that specifies whether the validation control is enabled or not
ErrorMessage | The text to display in the ValidationSummary control when validation fails. Note: This text will also be displayed in the validation control if the Text property is not set
ForeColor | The foreground color of the control
id | A unique id for the control
IsValid | A Boolean value that indicates whether the control specified by ControlToValidate is determined to be valid
MaximumValue | Specifies the maximum value of the input control
MinimumValue | Specifies the minimum value of the input control
runat | Specifies that the control is a server control. Must be set to "server"

Type

Specifies the data type of the value to check. The types are:

- Currency
- Date
- Double
- Integer
- String

Text | The message to display when validation fails

## Examples

RangeValidator
Declare one TextBox control, one Button control, and one RangeValidator control in an .aspx file. If validation fails, the text "The date must be between 1/1/2002 and 31/5/2002!" will be displayed in the RangeValidator control.

RangeValidator 2
Declare one TextBox control, one Button control, one Label control, and one RangeValidator control in an .aspx file. The submit() function checks if the page is valid. If it is valid, it returns "The page is valid!" in the Label control. If it is not valid, it returns "The page is not valid!" in the Label control. If validation fails, the text "The value must be from 1 to 100!" will be displayed in the RangeValidator control.

Validation Server Controls

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