FileStream.BeginRead(Byte[], Int32, Int32, AsyncCallback, Object) Metode
Penting
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Memulai operasi baca asinkron. Pertimbangkan untuk menggunakan ReadAsync(Byte[], Int32, Int32, CancellationToken) sebagai gantinya.
public:
override IAsyncResult ^ BeginRead(cli::array <System::Byte> ^ array, int offset, int numBytes, AsyncCallback ^ callback, System::Object ^ state);public:
override IAsyncResult ^ BeginRead(cli::array <System::Byte> ^ buffer, int offset, int count, AsyncCallback ^ callback, System::Object ^ state);public:
override IAsyncResult ^ BeginRead(cli::array <System::Byte> ^ array, int offset, int numBytes, AsyncCallback ^ userCallback, System::Object ^ stateObject);public override IAsyncResult BeginRead (byte[] array, int offset, int numBytes, AsyncCallback? callback, object? state);public override IAsyncResult BeginRead (byte[] buffer, int offset, int count, AsyncCallback? callback, object? state);public override IAsyncResult BeginRead (byte[] buffer, int offset, int count, AsyncCallback callback, object state);public override IAsyncResult BeginRead (byte[] array, int offset, int numBytes, AsyncCallback callback, object state);public override IAsyncResult BeginRead (byte[] array, int offset, int numBytes, AsyncCallback callback, object? state);public override IAsyncResult BeginRead (byte[] array, int offset, int numBytes, AsyncCallback userCallback, object stateObject);override this.BeginRead : byte[] * int * int * AsyncCallback * obj -> IAsyncResultoverride this.BeginRead : byte[] * int * int * AsyncCallback * obj -> IAsyncResultoverride this.BeginRead : byte[] * int * int * AsyncCallback * obj -> IAsyncResultPublic Overrides Function BeginRead (array As Byte(), offset As Integer, numBytes As Integer, callback As AsyncCallback, state As Object) As IAsyncResultPublic Overrides Function BeginRead (buffer As Byte(), offset As Integer, count As Integer, callback As AsyncCallback, state As Object) As IAsyncResultPublic Overrides Function BeginRead (array As Byte(), offset As Integer, numBytes As Integer, userCallback As AsyncCallback, stateObject As Object) As IAsyncResult- arraybuffer
- Byte[]
Buffer untuk membaca data.
- offset
- Int32
Offset byte untuk array mulai membaca.
- numBytescount
- Int32
Jumlah maksimum byte yang akan dibaca.
- callbackuserCallback
- AsyncCallback
Metode yang akan dipanggil ketika operasi baca asinkron selesai.
- statestateObject
- Object
Objek yang disediakan pengguna yang membedakan permintaan baca asinkron khusus ini dari permintaan lain.
Objek yang mereferensikan pembacaan asinkron.
Panjang array minus offset kurang dari numBytes.
arrayadalah null.
offset atau numBytes negatif.
Pembacaan asinkron dicoba melewati akhir file.
| Produk | Versi |
|---|---|
| .NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
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