String.Substring メソッド (Int32)

インスタンスから部分文字列を取得します。検索は、指定した文字位置から開始されます。

Overloads Public Function Substring( _
   ByVal startIndex As Integer _) As String
[C#]
public string Substring(intstartIndex);
[C++]
public: String* Substring(intstartIndex);
[JScript]
public function Substring(
   startIndex : int) : String;

パラメータ

• startIndex
  このインスタンス内の部分文字列の開始文字位置。

戻り値

このインスタンスの startIndex から開始する部分文字列と等価の String 。

または

startIndex の値がこのインスタンスの長さと等しい場合は Empty 。

例外

解説

インデックスが 0 から始まっています。

使用例

文字列の部分文字列を取得する例を次に示します。

 
Imports System

Public Class SubStringTest
    
    Public Shared Sub Main()
        Dim info As String() = {"Name: Felica Walker", "Title: Mz.", "Age: 47", "Location: Paris", "Gender: F"}
        Dim found As Integer = 0
       
        Console.WriteLine("The initial values in the array are:")
        Dim s As String
        For Each s In  info
            Console.WriteLine(s)
        
        Next s
        Console.WriteLine("{0}We want to retrieve only the key information. That is:", Environment.NewLine)
        
        For Each s In  info
            found = s.IndexOf(":")
            Console.WriteLine(s.Substring((found + 1)).Trim())
        Next s
    End Sub 'Main
End Class 'SubStringTest

[C#] 
using System;

public class SubStringTest {
    public static void Main() {

        string [] info = {"Name: Felica Walker", "Title: Mz.", "Age: 47", "Location: Paris", "Gender: F"};
        int found = 0;

        Console.WriteLine("The initial values in the array are:");
        foreach (string s in info)
            Console.WriteLine(s);

        Console.WriteLine("{0}We want to retrieve only the key information. That is:", Environment.NewLine);        

        foreach (string s in info) {
            found = s.IndexOf(":");
            Console.WriteLine(s.Substring(found + 1).Trim());
        }
    }
}

[C++] 
#using <mscorlib.dll>

using namespace System;
using namespace System::Collections;

int main()
{
   String* info[] = {S"Name: Felica Walker", S"Title: Mz.", S"Age: 47", S"Location: Paris", S"Gender: F"};
   int found = 0;

   Console::WriteLine(S"The initial values in the array are:");
   IEnumerator* myEnum1 = info->GetEnumerator();
   while (myEnum1->MoveNext()) {
      String* s = __try_cast<String*>(myEnum1->Current);
      Console::WriteLine(s);
   }
   Console::WriteLine(S"\nWe want to retrieve only the key information. That is:");        
   IEnumerator* myEnum2 = info->GetEnumerator();
   while (myEnum2->MoveNext()) {
      String* s = __try_cast<String*>(myEnum2->Current);
      found = s->IndexOf(S":");
      Console::WriteLine(s->Substring(found + 1)->Trim());
   }
}

[JScript] 
import System;

public class SubStringTest {
    public static function Main() : void {

        var info : String [] = ["Name: Felica Walker", "Title: Mz.", "Age: 47", "Location: Paris", "Gender: F"];
        var found : int = 0;

        Console.WriteLine("The initial values in the array are:");
        for (var i : int in info)
            Console.WriteLine(info[i]);

        Console.WriteLine("{0}We want to retrieve only the key information. That is:", Environment.NewLine);        

        for (i in info) {
            found = info[i].IndexOf(":");
            Console.WriteLine(info[i].Substring(found + 1).Trim());
        }
    }
}
SubStringTest.Main();

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, .NET Compact Framework - Windows CE .NET, Common Language Infrastructure (CLI) Standard

参照

String クラス | String メンバ | System 名前空間 | String.Substring オーバーロードの一覧 | Int32 | Concat | Insert | Join | Remove | Replace | Split | Trim