IntegerValidator 类
定义
重要
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对 Int32 值进行验证。
public ref class IntegerValidator : System::Configuration::ConfigurationValidatorBasepublic class IntegerValidator : System.Configuration.ConfigurationValidatorBasetype IntegerValidator = class
inherit ConfigurationValidatorBasePublic Class IntegerValidator
Inherits ConfigurationValidatorBase- 继承
示例
下面的代码示例演示如何使用 IntegerValidator 类型。
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());
}
}
}
}
Imports System.Configuration
Namespace Microsoft.Samples.AspNet.Validators
Module UsingIntegerValidator
Public Sub Main()
' 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
Dim minIntVal As Int32 = 1
Dim maxIntVal As Int32 = 10
Dim exclusive As Boolean = False
Dim validator As IntegerValidator = _
New IntegerValidator(minIntVal, maxIntVal, exclusive)
Dim testInt As Integer = 0
ValidateInteger(validator, testInt)
testInt = 1
ValidateInteger(validator, testInt)
testInt = 5
ValidateInteger(validator, 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
validator = _
New IntegerValidator(minIntVal, maxIntVal, exclusive)
testInt = 0
ValidateInteger(validator, testInt)
testInt = 1
ValidateInteger(validator, testInt)
testInt = 5
ValidateInteger(validator, testInt)
Console.WriteLine()
Console.WriteLine( _
"Determine if an object to validate can be validated.")
Dim testObjectToValidate As Object = "a"
Console.WriteLine("Can validate object of type {0}: {1}", _
testObjectToValidate.GetType(), _
validator.CanValidate(testObjectToValidate.GetType()))
testObjectToValidate = New Integer()
Console.WriteLine("Can validate object of type {0}: {1}", _
testObjectToValidate.GetType(), _
validator.CanValidate(testObjectToValidate.GetType()))
' Leave output on screen until enter is pressed.
Console.ReadLine()
End Sub
Sub ValidateInteger(ByVal validator As IntegerValidator, ByVal valueToValidate As Integer)
Console.Write("Validating integer value of {0}: ", valueToValidate)
Try
validator.Validate(valueToValidate)
Console.WriteLine("Validated.")
Catch e As ArgumentException
Console.WriteLine("Failed validation. Message: {0}", e.Message.ToString())
End Try
End Sub
End Module
End Namespace
注解
类 IntegerValidator 用于确保整数满足特定条件。 创建 类的实例时， IntegerValidator 将建立验证条件。 具有两个参数的 IntegerValidator 构造函数可确保所验证的整数同时遵循最小值和最大值。 具有三个参数的 IntegerValidator 构造函数会检查最小值和最大值 Int32 ，以及要验证的值是否在指定范围内。 具有四个参数的 IntegerValidator 构造函数检查前三个参数， Int32 并检查值是否等于特定分辨率。
方法 CanValidate 确定要验证的对象类型是否与预期类型匹配。 正在验证的对象作为 方法的参数 Validate 传递。
构造函数
方法
| CanValidate(Type) |
确定是否可以验证该对象的类型。 |
| Equals(Object) |
确定指定对象是否等于当前对象。 (继承自 Object) |
| GetHashCode() |
作为默认哈希函数。 (继承自 Object) |
| GetType() |
获取当前实例的 Type。 (继承自 Object) |
| MemberwiseClone() |
创建当前 Object 的浅表副本。 (继承自 Object) |
| ToString() |
返回表示当前对象的字符串。 (继承自 Object) |
| Validate(Object) |
确定对象的值是否有效。 |
