System.Web.UI.WebControls Namespace

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Checks whether the value of an input control is within a specified range of values.

RangeValidator Class Members

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Constructors Visibility Constructor Parameters public RangeValidator ( )   Properties Visibility Name Value Type Accessibility public MaximumValue String [ Get , Set ] public MinimumValue String [ Get , Set ]   Methods Visibility Name Parameters Return Type protected AddAttributesToRender ( HtmlTextWriter writer ) Void protected ControlPropertiesValid ( ) Boolean protected EvaluateIsValid ( ) Boolean

The RangeValidator server control tests whether an input value falls within a given range. It uses three key properties to perform its validation:

• ControlToValidate specifies the input control which contains the value to validate;
• MinimumValue specifies the lower bound of the valid range;
• MaximumValue specifies the upper bound of the valid range.

The MinimumValue and MaximumValue are stored as string values, but are converted to the data type defined by the Type property when the validation operation is performed.

NOTE: The RangeValidator control throws an exception if the value specified by the MaximumValue or MinimumValue property cannot be converted to the specified Type.

NOTE: Validation succeeds if the input control is empty. To force the user to enter data into the input control, use a RequiredFieldValidator.

For examples illustrating use of this control, see the individual member types of this class. For syntax information, see RangeValidator in ASP.NET Syntax for Validation Controls.

BaseValidator   BaseCompareValidator   Validating Against a Range of Values

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