FileStream.BeginWrite Method
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Begins an asynchronous write.
Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
<SecuritySafeCriticalAttribute> _
Public Overrides Function BeginWrite ( _
array As Byte(), _
offset As Integer, _
numBytes As Integer, _
userCallback As AsyncCallback, _
stateObject As Object _
) As IAsyncResult
[SecuritySafeCriticalAttribute]
public override IAsyncResult BeginWrite(
byte[] array,
int offset,
int numBytes,
AsyncCallback userCallback,
Object stateObject
)
Parameters
- array
Type: array<System.Byte[]
The buffer containing data to write to the current stream.
- offset
Type: System.Int32
The zero-based byte offset in array at which to begin copying bytes to the current stream.
- numBytes
Type: System.Int32
The maximum number of bytes to write.
- userCallback
Type: System.AsyncCallback
The method to be called when the asynchronous write operation is completed.
- stateObject
Type: System.Object
A user-provided object that distinguishes this particular asynchronous write request from other requests.
Return Value
Type: System.IAsyncResult
An IAsyncResult that references the asynchronous write.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentException | array length minus offset is less than numBytes. |
| ArgumentNullException | array is nulla null reference (Nothing in Visual Basic). |
| ArgumentOutOfRangeException | offset or numBytes is negative. |
| NotSupportedException | The stream does not support writing. |
| ObjectDisposedException | The stream is closed. |
| IOException | An I/O error occurs. |
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.