INameCreationService Интерфейс

Определение

Пространство имен:

System.ComponentModel.Design.Serialization

Сборка:

System.ComponentModel.TypeConverter.dll

Предоставляет службу для генерации уникальных имен объектов.

public interface class INameCreationService

public interface INameCreationService

type INameCreationService = interface

Public Interface INameCreationService

Производный

Примеры

В следующем примере кода представлен пример INameCreationService реализации. Служба может создать уникальное имя на основе типа, который не соответствует ни одному имени в указанном контейнере. Он также может проверить указанную строку имени.

#using <System.dll>

using namespace System;
using namespace System::ComponentModel::Design;
using namespace System::ComponentModel::Design::Serialization;
using namespace System::Globalization;

namespace NameCreationServiceExample
{
   public ref class NameCreationService: public System::ComponentModel::Design::Serialization::INameCreationService
   {
   public:
      NameCreationService(){}

      // Creates an identifier for a particular data type that does not conflict 
      // with the identifiers of any components in the specified collection.
      virtual String^ CreateName( System::ComponentModel::IContainer^ container, System::Type^ dataType )
      {
         // Create a basic type name string.
         String^ baseName = dataType->Name;
         int uniqueID = 1;
         bool unique = false;

         // Continue to increment uniqueID numeral until a 
         // unique ID is located.
         while (  !unique )
         {
            unique = true;

            // Check each component in the container for a matching 
            // base type name and unique ID.
            for ( int i = 0; i < container->Components->Count; i++ )
            {
               // Check component name for match with unique ID string.
               if ( container->Components[ i ]->Site->Name->StartsWith( String::Concat( baseName, uniqueID ) ) )
               {
                  // If a match is encountered, set flag to recycle 
                  // collection, increment ID numeral, and restart.
                  unique = false;
                  uniqueID++;
                  break;
               }
            }
         }

         return String::Concat( baseName, uniqueID );
      }

      // Returns whether the specified name contains 
      // all valid character types.
      virtual bool IsValidName( String^ name )
      {
         for ( int i = 0; i < name->Length; i++ )
         {
            Char ch = name[ i ];
            UnicodeCategory uc = Char::GetUnicodeCategory( ch );
            switch ( uc )
            {
               case UnicodeCategory::UppercaseLetter:
               case UnicodeCategory::LowercaseLetter:
               case UnicodeCategory::TitlecaseLetter:
               case UnicodeCategory::DecimalDigitNumber:
                  break;

               default:
                  return false;
            }
         }
         return true;
      }

      // Throws an exception if the specified name does not contain 
      // all valid character types.
      virtual void ValidateName( String^ name )
      {
         for ( int i = 0; i < name->Length; i++ )
         {
            Char ch = name[ i ];
            UnicodeCategory uc = Char::GetUnicodeCategory( ch );
            switch ( uc )
            {
               case UnicodeCategory::UppercaseLetter:
               case UnicodeCategory::LowercaseLetter:
               case UnicodeCategory::TitlecaseLetter:
               case UnicodeCategory::DecimalDigitNumber:
                  break;

               default:
                  throw gcnew Exception( String::Format( "The name '{0}' is not a valid identifier.", name ) );
            }
         }
      }
   };
}

using System;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Globalization;

namespace NameCreationServiceExample
{
    public class NameCreationService : System.ComponentModel.Design.Serialization.INameCreationService
    {
        public NameCreationService()
        {
        }

        // Creates an identifier for a particular data type that does not conflict 
        // with the identifiers of any components in the specified collection.
        public string CreateName(System.ComponentModel.IContainer container, System.Type dataType)
        {
            // Create a basic type name string.
            string baseName = dataType.Name;
            int uniqueID = 1;

            bool unique = false;            
            // Continue to increment uniqueID numeral until a 
            // unique ID is located.
            while( !unique )
            {
                unique = true;
                // Check each component in the container for a matching 
                // base type name and unique ID.
                for(int i=0; i<container.Components.Count; i++)
                {
                    // Check component name for match with unique ID string.
                    if( container.Components[i].Site.Name.StartsWith(baseName+uniqueID.ToString()) )
                    {
                        // If a match is encountered, set flag to recycle 
                        // collection, increment ID numeral, and restart.
                        unique = false;
                        uniqueID++;
                        break;
                    }
                }
            }
            
            return baseName+uniqueID.ToString();
        }

        // Returns whether the specified name contains 
        // all valid character types.
        public bool IsValidName(string name)
        {            
            for(int i = 0; i < name.Length; i++)
            {
                char ch = name[i];
                UnicodeCategory uc = Char.GetUnicodeCategory(ch);
                switch (uc) 
                {
                    case UnicodeCategory.UppercaseLetter:       
                    case UnicodeCategory.LowercaseLetter:     
                    case UnicodeCategory.TitlecaseLetter:                                                  
                    case UnicodeCategory.DecimalDigitNumber:                         
                        break;
                    default:
                        return false;                
                }
            }
            return true;        
         }

        // Throws an exception if the specified name does not contain 
        // all valid character types.
        public void ValidateName(string name)
        {
            for(int i = 0; i < name.Length; i++)
            {
                char ch = name[i];
                UnicodeCategory uc = Char.GetUnicodeCategory(ch);
                switch (uc) 
                {
                    case UnicodeCategory.UppercaseLetter:       
                    case UnicodeCategory.LowercaseLetter:     
                    case UnicodeCategory.TitlecaseLetter:                                                  
                    case UnicodeCategory.DecimalDigitNumber:                         
                        break;
                    default:
                        throw new Exception("The name '"+name+"' is not a valid identifier.");                
                }
            }
        }
     }
}

Imports System.ComponentModel.Design
Imports System.ComponentModel.Design.Serialization
Imports System.Globalization

Public Class NameCreationService
    Implements System.ComponentModel.Design.Serialization.INameCreationService

    Public Sub New()
    End Sub

    ' Creates an identifier for a particular data type that does not conflict 
    ' with the identifiers of any components in the specified collection
    Public Function CreateName(ByVal container As System.ComponentModel.IContainer, ByVal dataType As System.Type) As String Implements INameCreationService.CreateName
        ' Create a basic type name string
        Dim baseName As String = dataType.Name
        Dim uniqueID As Integer = 1

        Dim unique As Boolean = False
        ' Continue to increment uniqueID numeral until a unique ID is located.
        While Not unique
            unique = True
            ' Check each component in the container for a matching 
            ' base type name and unique ID.
            Dim i As Integer
            For i = 0 To container.Components.Count - 1
                ' Check component name for match with unique ID string.
                If container.Components(i).Site.Name.StartsWith((baseName + uniqueID.ToString())) Then
                    ' If a match is encountered, set flag to recycle 
                    ' collection, increment ID numeral, and restart.
                    unique = False
                    uniqueID += 1
                    Exit For
                End If
            Next i
        End While

        Return baseName + uniqueID.ToString()
    End Function

    ' Returns whether the specified name contains 
    ' all valid character types.
    Public Function IsValidName(ByVal name As String) As Boolean Implements INameCreationService.IsValidName
        Dim i As Integer
        For i = 0 To name.Length - 1
            Dim ch As Char = name.Chars(i)
            Dim uc As UnicodeCategory = [Char].GetUnicodeCategory(ch)
            Select Case uc
                Case UnicodeCategory.UppercaseLetter, UnicodeCategory.LowercaseLetter, UnicodeCategory.TitlecaseLetter, UnicodeCategory.DecimalDigitNumber
                Case Else
                    Return False
            End Select
        Next i
        Return True
    End Function

    ' Throws an exception if the specified name does not contain 
    ' all valid character types.
    Public Sub ValidateName(ByVal name As String) Implements INameCreationService.ValidateName
        Dim i As Integer
        For i = 0 To name.Length - 1
            Dim ch As Char = name.Chars(i)
            Dim uc As UnicodeCategory = [Char].GetUnicodeCategory(ch)
            Select Case uc
                Case UnicodeCategory.UppercaseLetter, UnicodeCategory.LowercaseLetter, UnicodeCategory.TitlecaseLetter, UnicodeCategory.DecimalDigitNumber
                Case Else
                    Throw New Exception("The name '" + name + "' is not a valid identifier.")
            End Select
        Next i
    End Sub

End Class

Комментарии

Может DesignerLoader реализовать эту службу, чтобы предоставить конструктору способ создания новых уникальных имен для объектов. Если эта служба недоступна, конструктор использует реализацию по умолчанию.

Методы

CreateName(IContainer, Type)	Создает новое имя, которое уникально для всех компонентов в указанном контейнере.
IsValidName(String)	Возвращает значение, определяющее, является ли указанное имя допустимым.
ValidateName(String)	Возвращает значение, определяющее, является ли указанное имя допустимым.