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DataServiceContext.GetReadStream Method (Object, DataServiceRequestArgs)

Gets binary data stream for the specified entity by using the specified message headers.

Namespace:  System.Data.Services.Client
Assembly:  Microsoft.Data.Services.Client (in Microsoft.Data.Services.Client.dll)

public DataServiceStreamResponse GetReadStream(
	Object entity,
	DataServiceRequestArgs args
)

Parameters

entity
Type: System.Object
The entity that has the binary stream to retrieve.
args
Type: System.Data.Services.Client.DataServiceRequestArgs
Instance of DataServiceRequestArgs class that contains settings for the HTTP request message.

Return Value

Type: System.Data.Services.Client.DataServiceStreamResponse
An instance of DataServiceStreamResponse that represents the response.

ExceptionCondition
ArgumentNullException

entity is null.

-or-

args is null.

ArgumentException

The entity is not tracked by this DataServiceContext.

-or-

The entity is in the Added state.

-or-

The entity is not a Media Link Entry and does not have a related binary stream.

The GetReadStream method synchronously requests the binary data stream that belongs to the requested entity.

In the AtomPub protocol, the entity is a Media Link Entry and the stream is the related Media Resource.

No validation is performed on the headers that are set in args. Therefore, do not change an HTTP header in a way that changes the meaning of the request.

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