PropertyInfo.GetIndexParameters メソッド
アセンブリ: mscorlib (mscorlib.dll 内)

Dim instance As PropertyInfo Dim returnValue As ParameterInfo() returnValue = instance.GetIndexParameters
インデックスのパラメータを格納している ParameterInfo 型の配列。

GetIndexParameters メソッドを使用するには、最初に Type クラスを取得します。そして、その Type から PropertyInfo を取得します。PropertyInfo から、GetIndexParameters メソッドを使用します。

指定したプロパティのインデックス パラメータを表示する例を次に示します。
Imports System Imports System.Reflection Imports System.Collections Imports Microsoft.VisualBasic ' A test class that has some properties. Public Class MyProperty ' Define a simple string property. Private myCaption As String = "A Default caption" Public Property Caption() As String Get Return myCaption End Get Set(ByVal Value As String) If myCaption <> value Then myCaption = value End If End Set End Property ' A very limited indexed default property that gets or ' sets one of four string values. Private strings() As String = {"abc", "def", "ghi", "jkl"} Public Default Property Item(ByVal Index As Integer) As String Get Return strings(Index) End Get Set strings(Index) = Value End Set End Property End Class Public Class Example Public Shared Function Main() As Integer ' Get the type and PropertyInfo. Dim t As Type = GetType(MyProperty) Dim pi As PropertyInfo = t.GetProperty("Caption") ' Get an array containing the parameters (if any). Dim params As ParameterInfo() = pi.GetIndexParameters() Console.WriteLine(vbCrLf & t.FullName & "." & pi.Name & _ " has " & params.GetLength(0) & " parameters.") ' Display a property that has parameters. pi = t.GetProperty("Item") params = pi.GetIndexParameters() Console.WriteLine(t.FullName & "." & pi.Name & _ " has " & params.GetLength(0) & " parameters.") For Each p As ParameterInfo In params Console.WriteLine(" Parameter: " & p.Name) Next Return 0 End Function End Class ' This example produces the following output: ' MyProperty.Caption has 0 parameters. ' MyProperty.Item has 1 parameters. ' Parameter: Index
using System; using System.Reflection; // A class that contains some properties. public class MyProperty { // Define a simple string property. private string caption = "A Default caption"; public string Caption { get{return caption;} set {if(caption!=value) {caption = value;} } } // A very limited indexer that gets or sets one of four // strings. private string[] strings = {"abc", "def", "ghi", "jkl"}; public string this[int Index] { get { return strings[Index]; } set { strings[Index] = value; } } } class Mypropertyinfo { public static int Main() { // Get the type and PropertyInfo. Type t = Type.GetType("MyProperty"); PropertyInfo pi = t.GetProperty("Caption"); // Get the public GetIndexParameters method. ParameterInfo[] parms = pi.GetIndexParameters(); Console.WriteLine("\r\n" + t.FullName + "." + pi.Name + " has " + parms.GetLength(0) + " parameters."); // Display a property that has parameters. The default // name of an indexer is "Item". pi = t.GetProperty("Item"); parms = pi.GetIndexParameters(); Console.WriteLine(t.FullName + "." + pi.Name + " has " + parms.GetLength(0) + " parameters."); foreach( ParameterInfo p in parms ) { Console.WriteLine(" Parameter: " + p.Name); } return 0; } } /* This example produces the following output: MyProperty.Caption has 0 parameters. MyProperty.Item has 1 parameters. Parameter: Index */
using namespace System; using namespace System::Reflection; // A class that contains some properties. public ref class MyProperty { private: // Define a simple string property. String^ caption; public: property String^ Caption { String^ get() { return caption; } void set( String^ value ) { if ( caption != value ) { caption = value; } } } private: // A very limited indexer that gets or sets one of four // strings. array<String^>^strings; public: MyProperty() { array<String^>^temp0 = {"abc","def","ghi" ,"jkl"}; strings = temp0; } property String^ Item [int] { String^ get( int Index ) { return strings[ Index ]; } void set( int Index, String^ value ) { strings[ Index ] = value; } } }; int main() { // Get the type and PropertyInfo. Type^ t = Type::GetType( "MyProperty" ); PropertyInfo^ pi = t->GetProperty( "Caption" ); // Get the public GetIndexParameters method. array<ParameterInfo^>^parms = pi->GetIndexParameters(); Console::WriteLine( "\n{0}.{1} has {2} parameters.", t->FullName, pi->Name, parms->GetLength( 0 ) ); // Display a property that has parameters. pi = t->GetProperty( "Item" ); parms = pi->GetIndexParameters(); Console::WriteLine( "{0}.{1} has {2} parameters.", t->FullName, pi->Name, parms->GetLength( 0 ) ); for ( int i = 0; i < parms->GetLength( 0 ); i++ ) { Console::WriteLine( " Parameter: {0}", parms[ i ]->Name ); } return 0; } /* This example produces the following output: MyProperty.Caption has 0 parameters. MyProperty.Item has 1 parameters. Parameter: Index */
import System.*; import System.Reflection.*; // A class that contains some properties. public class MyProperty { // Define a simple string property. private String caption = "A Default caption"; /** @property */ public String get_Caption() { return caption ; } //get_Caption /** @property */ public void set_Caption ( String value ) { if (caption != value) { caption = value; } } //set_Caption // A very limited indexer that gets or sets one of four // strings. private String strings[] = {"abc", "def", "ghi", "jkl"}; /** @property */ public String get_Item(int Index) { return strings[Index] ; } //get_Item /** @property */ public void set_Item (int Index,String value) { strings[Index] = value; } //set_Item } //MyProperty class MyPropertyInfo { public static void main(String[] args) { // Get the type and PropertyInfo. Type t = Type.GetType("MyProperty"); PropertyInfo pi = t.GetProperty("Caption"); // Get the public GetIndexParameters method. ParameterInfo parms[] = pi.GetIndexParameters(); Console.WriteLine(("\r\n" + t.get_FullName() + "." + pi.get_Name() + " has " + parms.GetLength(0) + " parameters.")); // Display a property that has parameters. The default // name of an indexer is "Item". pi = t.GetProperty("Item"); parms = pi.GetIndexParameters(); Console.WriteLine((t.get_FullName() + "." + pi.get_Name() + " has " + parms.GetLength(0) + " parameters.")); for(int iCtr=0; iCtr< parms.length; iCtr++) { ParameterInfo p = parms[iCtr]; Console.WriteLine((" Parameter: " + p.get_Name())); } } //main } //MyPropertyInfo /* This example produces the following output: MyProperty.Caption has 0 parameters. MyProperty.Item has 1 parameters. Parameter: Index */
import System; import System.Reflection; //Make a property public class Myproperty { private var caption : String = "A Default caption"; public function get Caption() : String { return caption; } public function set Caption(value:String) { if(caption!=value) caption = value; } } class Mypropertyinfo { public static function Main() : void { Console.WriteLine ("\nReflection.PropertyInfo"); //Get the type and PropertyInfo var MyType : Type = Type.GetType("Myproperty"); var Mypropertyinfo : PropertyInfo = MyType.GetProperty("Caption"); //Get the public GetIndexParameters Method var Myparameterinfoarray : ParameterInfo[] = Mypropertyinfo.GetIndexParameters(); Console.Write ("\n" + MyType.FullName + "." + Mypropertyinfo.Name + " has " + Myparameterinfoarray.GetLength(0) + " parameters"); } } Mypropertyinfo.Main(); /* Produces the following output Reflection.PropertyInfo Myproperty.Caption has 0 parameters */


Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


_PropertyInfo.GetIndexParameters メソッド
アセンブリ: mscorlib (mscorlib.dll 内)

Dim instance As _PropertyInfo Dim returnValue As ParameterInfo() returnValue = instance.GetIndexParameters
インデックスのパラメータを格納している ParameterInfo 型の配列。


Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


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