PositiveTimeSpanValidator 類別

定義

public ref class PositiveTimeSpanValidator : System::Configuration::ConfigurationValidatorBase

public class PositiveTimeSpanValidator : System.Configuration.ConfigurationValidatorBase

type PositiveTimeSpanValidator = class
    inherit ConfigurationValidatorBase

Public Class PositiveTimeSpanValidator
Inherits ConfigurationValidatorBase

繼承

Object

ConfigurationValidatorBase

PositiveTimeSpanValidator

範例

以下程式碼範例示範如何使用該 PositiveTimeSpanValidator 型別。

using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.ComponentModel;

namespace Samples.AspNet
{
    // Implements a custom validator attribute. 
    [AttributeUsage(AttributeTargets.Property)]
    public sealed class CustomValidatorAttribute :
        ConfigurationValidatorAttribute
    {
        public CustomValidatorAttribute()
        {
        }

        public CustomValidatorAttribute(Type validator)
            : base(validator)
        {
        }

        new public Type ValidatorType
        {
            get
            { return GetType(); }
        }

        public override ConfigurationValidatorBase ValidatorInstance
        {
            get
            {
                // Create validator.
                return new PositiveTimeSpanValidator();
            }
        }
    }

    // Implements a custom section class.
    public class SampleSection : ConfigurationSection
    {
        [ConfigurationProperty("name", DefaultValue = "MyBuildRoutine",
                   IsRequired = true)]
        [StringValidator(InvalidCharacters = " ~!@#$%^&*()[]{}/;'\"|\\",
      MinLength = 1, MaxLength = 60)]
        public string Name
        {
            get
            {
                return (string)this["name"];
            }
            set
            {
                this["name"] = value;
            }
        }

        [ConfigurationProperty("BuildStartTime", IsRequired = true,
          DefaultValue = "09:00:00")]
        public TimeSpan BuildStartTime
        {
            get
            {
                TimeSpanConverter myTSC = new TimeSpanConverter();
                return (TimeSpan)this["BuildStartTime"];
            }
            set
            {
                this["BuildStartTime"] = value.ToString();
            }
        }

        [ConfigurationProperty("BuildEndTime", IsRequired = true,
          DefaultValue = "17:00:00")]
        public TimeSpan BuildEndTime
        {
            get
            {
                TimeSpanConverter myTSC = new TimeSpanConverter();
                return (TimeSpan)this["BuildEndTime"];
            }
            set
            {
                this["BuildEndTime"] = value.ToString();
            }
        }
    }

    // Implements the console user interface.
    class TestingCustomValidatorAttribute
    {
        // Shows how to use the ValidatorInstance method.
        public static void GetCustomValidatorInstance()
        {
            ConfigurationValidatorBase valBase;
            CustomValidatorAttribute customValAttr;
            customValAttr = new CustomValidatorAttribute();

            SampleSection sampleSection =
              ConfigurationManager.GetSection("MyDailyProcess") as SampleSection;

            TimeSpanConverter myTSC = new TimeSpanConverter();
            TimeSpan StartTimeSpan = (TimeSpan)myTSC.ConvertFromString(sampleSection.BuildStartTime.ToString());
            TimeSpan EndTimeSpan = (TimeSpan)myTSC.ConvertFromString(sampleSection.BuildEndTime.ToString());
            TimeSpan resultTimeSpan = EndTimeSpan - StartTimeSpan;

            try
            {
                // Determine if the Validator can validate
                // the type it contains.
                valBase = customValAttr.ValidatorInstance;
                if (valBase.CanValidate(resultTimeSpan.GetType()))
                {
                    // Validate the TimeSpan using a
                    // custom PositiveTimeSpanValidator.
                    valBase.Validate(resultTimeSpan);
                }
            }
            catch (ArgumentException e)
            {
                // Store error message.
                string msg = e.Message.ToString();
#if DEBUG
                Console.WriteLine("Error: {0}", msg);
#endif
            }
        }

        // Create required sections.
        static void CreateSection()
        {
            // Get the current configuration (file).
            System.Configuration.Configuration config =
              ConfigurationManager.OpenExeConfiguration(
              ConfigurationUserLevel.None);

            // Define the sample section.
            SampleSection sampleSection;

            // Create the handler section named MyDailyProcess 
            // in the <configSections>. Also, create the 
            // <MyDailyProcess> target section
            // in <configuration>.
            if (config.Sections["MyDailyProcess"] == null)
            {
                sampleSection = new SampleSection();
                config.Sections.Add("MyDailyProcess", sampleSection);
                sampleSection.SectionInformation.ForceSave = true;
                config.Save(ConfigurationSaveMode.Full);
            }
        }

        static void DisplaySectionProperties()
        {
            SampleSection sampleSection =
               ConfigurationManager.GetSection("MyDailyProcess") as SampleSection;

            if (sampleSection == null)
            {
                Console.WriteLine("Failed to load section.");
            }
            else
            {
                Console.WriteLine("Defaults:");
                Console.WriteLine("  Name: {0}", sampleSection.Name);
                Console.WriteLine("  BuildStartTime: {0}", sampleSection.BuildStartTime);
                Console.WriteLine("  BuildEndTime: {0}", sampleSection.BuildEndTime);
            }
        }

        static void Main(string[] args)
        {
            Console.WriteLine("[Create a section]");
            CreateSection();

            Console.WriteLine("[Display section information]");
            DisplaySectionProperties();

            // Show how to use the ValidatorInstance method.
            GetCustomValidatorInstance();

            // Display and wait.
            Console.ReadLine();
        }
    }
}

Imports System.Collections.Generic
Imports System.Text
Imports System.Configuration
Imports System.ComponentModel

Namespace Samples.AspNet.Configuration

    ' Implements a custom validator attribute. 
    <AttributeUsage(AttributeTargets.Property)> _
      Public NotInheritable Class CustomValidatorAttribute
        Inherits ConfigurationValidatorAttribute

        Public Sub New()
        End Sub

        Public Sub New(ByVal validator As Type)
            MyBase.New(validator)
        End Sub

        Public Shadows ReadOnly Property _
        ValidatorType() As Type
            Get
                Return [GetType]()
            End Get
        End Property

        Public Overrides ReadOnly Property ValidatorInstance() As ConfigurationValidatorBase
            Get
                ' Create validator.
                Return New PositiveTimeSpanValidator()
            End Get
        End Property
    End Class

    ' Implements a custom section class.
    Public Class SampleSection
        Inherits ConfigurationSection
        <ConfigurationProperty("name", DefaultValue:="MyBuildRoutine", IsRequired:=True), _
        StringValidator(InvalidCharacters:=" ~!@#$%^&*()[]{}/;'""|\", _
        MinLength:=1, MaxLength:=60)> _
         Public Property Name() As String
            Get
                Return CType(Me("name"), String)
            End Get
            Set(ByVal Value As String)
                Me("name") = Value
            End Set
        End Property

        <ConfigurationProperty("BuildStartTime", IsRequired:=True, _
          DefaultValue:="09:00:00")> _
        Public Property BuildStartTime() As TimeSpan
            Get
                Dim myTSC As TimeSpanConverter = New TimeSpanConverter()
                Return CType(Me("BuildStartTime"), TimeSpan)
            End Get
            Set(ByVal Value As TimeSpan)
                Me("BuildStartTime") = Value.ToString()
            End Set
        End Property

        <ConfigurationProperty("BuildEndTime", IsRequired:=True, _
          DefaultValue:="17:00:00")> _
        Public Property BuildEndTime() As TimeSpan
            Get
                Dim myTSC As TimeSpanConverter = New TimeSpanConverter()
                Return CType(Me("BuildEndTime"), TimeSpan)
            End Get
            Set(ByVal Value As TimeSpan)
                Me("BuildEndTime") = Value.ToString()
            End Set
        End Property
    End Class

    ' Implements the console user interface.
    Class TestingCustomValidatorAttribute
        ' Shows how to use the ValidatorInstance method.
        Public Shared Sub GetCustomValidatorInstance()
            Dim valBase As ConfigurationValidatorBase
            Dim customValAttr As CustomValidatorAttribute
            customValAttr = New CustomValidatorAttribute()

            Dim sampleSection As SampleSection = ConfigurationManager.GetSection("MyDailyProcess")

            Dim myTSC As TimeSpanConverter = New TimeSpanConverter()
            Dim StartTimeSpan As TimeSpan = CType(myTSC.ConvertFromString(SampleSection.BuildStartTime.ToString()), TimeSpan)
            Dim EndTimeSpan As TimeSpan = CType(myTSC.ConvertFromString(SampleSection.BuildEndTime.ToString()), TimeSpan)
            Dim resultTimeSpan As TimeSpan = EndTimeSpan - StartTimeSpan

            Try
                ' Determine if the Validator can validate
                ' the type it contains.
                valBase = customValAttr.ValidatorInstance
                If valBase.CanValidate(resultTimeSpan.GetType()) Then
                    ' Validate the TimeSpan using a
                    ' custom PositiveTimeSpanValidator.
                    valBase.Validate(resultTimeSpan)
                End If
            Catch e As ArgumentException
                ' Store error message.
                Dim msg As String = e.Message.ToString()
#If DEBUG Then
                Console.WriteLine("Error: {0}", msg)
#End If
            End Try
        End Sub

        ' Create required sections.
        Shared Sub CreateSection()
            ' Get the current configuration (file).
            Dim config As System.Configuration.Configuration = _
              ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)

            ' Define the sample section.
            Dim sampleSection As SampleSection

            ' Create the handler section named MyDailyProcess 
            ' in the <configSections>. Also, create the 
            ' <MyDailyProcess> target section
            ' in <configuration>.
            If config.Sections("MyDailyProcess") Is Nothing Then
                sampleSection = New SampleSection()
                config.Sections.Add("MyDailyProcess", sampleSection)
                sampleSection.SectionInformation.ForceSave = True
                config.Save(ConfigurationSaveMode.Full)
            End If
        End Sub

        Shared Sub DisplaySectionProperties()
            Dim sampleSection As SampleSection = ConfigurationManager.GetSection("MyDailyProcess")

            If SampleSection Is Nothing Then
                Console.WriteLine("Failed to load section.")
            Else
                Console.WriteLine("Defaults:")
                Console.WriteLine("  Name: {0}", SampleSection.Name)
                Console.WriteLine("  BuildStartTime: {0}", SampleSection.BuildStartTime)
                Console.WriteLine("  BuildEndTime: {0}", SampleSection.BuildEndTime)
            End If
        End Sub

        Shared Sub Main(ByVal args() As String)
            Console.WriteLine("[Create a section]")
            CreateSection()

            Console.WriteLine("[Display section information]")
            DisplaySectionProperties()

            ' Show how to use the ValidatorInstance method.
            GetCustomValidatorInstance()

            ' Display and wait.
            Console.ReadLine()
        End Sub
    End Class
End Namespace

備註

用來 PositiveTimeSpanValidator 確保 TimeSpan 物件符合特定標準。 該方法判斷 CanValidate 被驗證的物件型別是否符合預期型別。 被驗證的物件會作為方法的 Validate 參數傳遞。 要通過驗證，被驗證的物件必須是正 TimeSpan 值。

另請參閱

• TimeSpanValidator
• ConfigurationValidatorBase