SqlFileStream.BeginWrite Method
Begins an asynchronous write operation.
Assembly: System.Data (in System.Data.dll)
[HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)] public override IAsyncResult BeginWrite( byte[] buffer, int offset, int count, AsyncCallback callback, Object state )
Parameters
- buffer
- Type: System.Byte[]
The buffer to write data from.
- offset
- Type: System.Int32
The byte offset in buffer from which to begin writing.
- count
- Type: System.Int32
The maximum number of bytes to write.
- callback
- Type: System.AsyncCallback
An optional asynchronous callback, to be called when the write is complete.
- state
- Type: System.Object
A user-provided object that distinguishes this particular asynchronous write request from other requests.
Return Value
Type: System.IAsyncResultAn IAsyncResult that represents the asynchronous write, which could still be pending.
| Exception | Condition |
|---|---|
| NotSupportedException |
Writing data is not supported on the stream. |
Use the CanWrite property to determine whether the current instance supports writing.
Note
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The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: ExternalThreading. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes. |
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
