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IntegerValidator Class

Definition

Provides validation of an Int32 value.

public class IntegerValidator : System.Configuration.ConfigurationValidatorBase
Inheritance

Examples

The following code example demonstrates how to use the IntegerValidator type.

using System;
using System.Configuration;

namespace Microsoft.Samples.AspNet.Validators
{
    class UsingIntegerValidator
    {
        static void Main(string[] args)
        {
            // Display title.
            Console.WriteLine("ASP.NET Validators");
            Console.WriteLine();

            Console.WriteLine(
                "Set mininum and maximum of 1 and 10 inclusive");

            // Create Validator for the range of 1 to 10 inclusive
            int minIntVal = 1;
            int maxIntVal = 10;
            bool exclusive = false;
            IntegerValidator integerValidator =
                new IntegerValidator(minIntVal, maxIntVal, exclusive);

            int testInt = 0;
            ValidateInteger(integerValidator, testInt);
            testInt = 1;
            ValidateInteger(integerValidator, testInt);
            testInt = 5;
            ValidateInteger(integerValidator, testInt);

            Console.WriteLine();
            Console.WriteLine(
                "Set mininum and maximum of 1 and 10 exclusive");

            // Create Validator for the range of 1 to 10 exclusive
            exclusive = true;
            integerValidator =
                new IntegerValidator(minIntVal, maxIntVal, exclusive);

            testInt = 0;
            ValidateInteger(integerValidator, testInt);
            testInt = 1;
            ValidateInteger(integerValidator, testInt);
            testInt = 5;
            ValidateInteger(integerValidator, testInt);

            Console.WriteLine();
            Console.WriteLine(
                "Determine if an object to validate can be validated.");

            object testObjectToValidate = "a";
            Console.WriteLine("Can validate object of type {0}: {1}",
                testObjectToValidate.GetType(),
                integerValidator.CanValidate(testObjectToValidate.GetType()));
            testObjectToValidate = new int();
            Console.WriteLine("Can validate object of type {0}: {1}",
                testObjectToValidate.GetType(),
                integerValidator.CanValidate(testObjectToValidate.GetType()));

            // Leave output on screen until enter is pressed.
            Console.ReadLine();
        }

        private static void ValidateInteger(IntegerValidator integerValidator, int valuetoValidate)
        {
            Console.Write("Validating integer value of {0}:  ", valuetoValidate);
            try
            {
                integerValidator.Validate(valuetoValidate);
                Console.WriteLine("Validated.");
            }
            catch (ArgumentException e)
            {
                Console.WriteLine("Failed validation.  Message: {0}", e.Message.ToString());
            }
        }
    }
}

Remarks

The IntegerValidator class is used to ensure that an integer meets specific criteria. The criteria for validation are established when an instance of the IntegerValidator class is created. The IntegerValidator constructor with two parameters ensures that the integer being verified adheres to both a minimum and a maximum value. The IntegerValidator constructor with three parameters checks both the minimum and maximum Int32 values, as well as whether the value to be validated is within the specified range. The IntegerValidator constructor with four parameters checks the previous three parameters and also checks whether the Int32 value is equal to a specific resolution.

The CanValidate method determines whether the object type being validated matches the expected type. The object being validated is passed as a parameter of the Validate method.

Constructors

IntegerValidator(Int32, Int32, Boolean, Int32)

Initializes a new instance of the IntegerValidator class.

IntegerValidator(Int32, Int32, Boolean)

Initializes a new instance of the IntegerValidator class.

IntegerValidator(Int32, Int32)

Initializes a new instance of the IntegerValidator class.

Methods

CanValidate(Type)

Determines whether the type of the object can be validated.

Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString()

Returns a string that represents the current object.

(Inherited from Object)
Validate(Object)

Determines whether the value of an object is valid.

Applies to

Продукт Версии
.NET 8 (package-provided), 9 (package-provided)
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1
.NET Standard 2.0 (package-provided)
Windows Desktop 3.0, 3.1, 5, 6, 7, 8, 9

See also