StringBuilder.Clear Metoda

Definice

Obor názvů:

System.Text

Sestavení:

netstandard.dll, System.Runtime.dll

Zdroj:

StringBuilder.cs

Odebere všechny znaky z aktuální StringBuilder instance.

public:
 System::Text::StringBuilder ^ Clear();

public System.Text.StringBuilder Clear();

member this.Clear : unit -> System.Text.StringBuilder

Public Function Clear () As StringBuilder

Návraty

StringBuilder

Objekt, jehož Length hodnota je 0 (nula).

Příklady

Následující příklad vytvoří instanci objektu StringBuilder s řetězcem, zavolá metodu Clear a pak připojí nový řetězec.

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)

open System.Text

let sb = StringBuilder "This is a string."
printfn $"{sb} ({sb.Length} characters)"

sb.Clear() |> ignore
printfn $"{sb} ({sb.Length} characters)"

sb.Append "This is a second string." |> ignore
printfn $"{sb} ({sb.Length} characters)"

// 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)

Poznámky

Clear je metoda usnadnění, která odpovídá nastavení Length vlastnosti aktuální instance na hodnotu 0 (nula).