StringBuilder.Clear メソッド

定義

現在の StringBuilder インスタンスからすべての文字を削除します。Removes all characters from the current StringBuilder instance.

public:
 System::Text::StringBuilder ^ Clear();
public System.Text.StringBuilder Clear ();
member this.Clear : unit -> System.Text.StringBuilder
Public Function Clear () As StringBuilder

戻り値

Length が 0 (ゼロ) であるオブジェクト。An object whose Length is 0 (zero).

次の例ではStringBuilder 、文字列を使用してオブジェクトClearをインスタンス化し、メソッドを呼び出して、新しい文字列を追加します。The following example instantiates a StringBuilder object with a string, calls the Clear method, and then appends a new string.

using System;
using System.Text;

public class Class1
{
   public static void Main()
   {
      StringBuilder sb = new StringBuilder("This is a string.");
      Console.WriteLine("{0} ({1} characters)", sb.ToString(), sb.Length);
      
      sb.Clear();
      Console.WriteLine("{0} ({1} characters)", sb.ToString(), sb.Length);

      sb.Append("This is a second string.");
      Console.WriteLine("{0} ({1} characters)", sb.ToString(), sb.Length);
   }
}
// The example displays the following output:
//       This is a string. (17 characters)
//        (0 characters)
//       This is a second string. (24 characters)
Imports System.Text

Module Example
   Public Sub Main()
      Dim sb As New StringBuilder("This is a string.")
      Console.WriteLine("{0} ({1} characters)", sb.ToString(), sb.Length)
      
      sb.Clear()
      Console.WriteLine("{0} ({1} characters)", sb.ToString(), sb.Length)

      sb.Append("This is a second string.")
      Console.WriteLine("{0} ({1} characters)", sb.ToString(), sb.Length)
   End Sub            
End Module
' The example displays the following output:
'       This is a string. (17 characters)
'        (0 characters)
'       This is a second string. (24 characters)

注釈

Clearは、現在のインスタンスのLengthプロパティを 0 (ゼロ) に設定するのと同じ便利な方法です。Clear is a convenience method that is equivalent to setting the Length property of the current instance to 0 (zero).

適用対象