StringReader.ReadToEndAsync Método

Definição

Lê todos os caracteres da posição atual até o final da cadeia de caracteres de forma assíncrona e os retorna como uma única cadeia de caracteres.Reads all characters from the current position to the end of the string asynchronously and returns them as a single string.

public:
 override System::Threading::Tasks::Task<System::String ^> ^ ReadToEndAsync();
public override System.Threading.Tasks.Task<string> ReadToEndAsync ();
[System.Runtime.InteropServices.ComVisible(false)]
public override System.Threading.Tasks.Task<string> ReadToEndAsync ();
override this.ReadToEndAsync : unit -> System.Threading.Tasks.Task<string>
[<System.Runtime.InteropServices.ComVisible(false)>]
override this.ReadToEndAsync : unit -> System.Threading.Tasks.Task<string>
Public Overrides Function ReadToEndAsync () As Task(Of String)

Retornos

Task<String>

Uma tarefa que representa a operação de leitura assíncrona.A task that represents the asynchronous read operation. O valor do parâmetro TResult contém uma cadeia de caracteres com os caracteres da posição atual até o final da cadeia de caracteres.The value of the TResult parameter contains a string with the characters from the current position to the end of the string.

Atributos

Exceções

O número de caracteres é maior que MaxValue.The number of characters is larger than MaxValue.

O leitor de cadeia de caracteres foi descartado.The string reader has been disposed.

O leitor está sendo usado no momento por uma operação de leitura anterior.The reader is currently in use by a previous read operation.

Exemplos

O exemplo a seguir mostra como ler uma cadeia de caracteres inteira de forma assíncrona.The following example shows how to read an entire string asynchronously.

using System;
using System.IO;
using System.Text;

namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            ReadCharacters();
        }

        static async void ReadCharacters()
        {
            StringBuilder stringToRead = new StringBuilder();
            stringToRead.AppendLine("Characters in 1st line to read");
            stringToRead.AppendLine("and 2nd line");
            stringToRead.AppendLine("and the end");

            using (StringReader reader = new StringReader(stringToRead.ToString()))
            {
                string readText = await reader.ReadToEndAsync();
                Console.WriteLine(readText);
            }
        }
    }
}
// The example displays the following output:
//
// Characters in 1st line to read
// and 2nd line
// and the end
//
Imports System.IO
Imports System.Text

Module Module1

    Sub Main()
        ReadCharacters()
    End Sub

    Async Sub ReadCharacters()
        Dim stringToRead = New StringBuilder()
        stringToRead.AppendLine("Characters in 1st line to read")
        stringToRead.AppendLine("and 2nd line")
        stringToRead.AppendLine("and the end")

        Using reader As StringReader = New StringReader(stringToRead.ToString())
            Dim readText As String = Await reader.ReadToEndAsync()
            Console.WriteLine(readText)
        End Using
    End Sub
End Module
' The example displays the following output:
'
' Characters in 1st line to read
' and 2nd line
' and the end
'

Aplica-se a