StringReader.ReadToEndAsync メソッド

定義

名前空間:
System.IO
アセンブリ:
System.IO.dll
アセンブリ:
System.Runtime.dll
アセンブリ:
System.Runtime.Extensions.dll
アセンブリ:
mscorlib.dll
アセンブリ:
netstandard.dll

現在位置から文字列の末尾まですべての文字を非同期的に読み取り、1 つの文字列として返します。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)

戻り値

Task<String>

非同期の読み取り操作を表すタスク。A task that represents the asynchronous read operation. TResult パラメーターの値には、現在位置から文字列の末尾までの文字から成る文字列が含まれます。The value of the TResult parameter contains a string with the characters from the current position to the end of the string.

属性
ComVisibleAttribute

例外

ArgumentOutOfRangeException

文字数が MaxValue を超えています。The number of characters is larger than MaxValue.

ObjectDisposedException

文字列リーダーは破棄されています。The string reader has been disposed.

InvalidOperationException

リーダーは、前の読み取り操作によって現在使用されています。The reader is currently in use by a previous read operation.

例

次の例は、文字列全体を非同期に読み取る方法を示しています。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
'

適用対象