237 lines
9.2 KiB
HTML
237 lines
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<title>Interface IAsyncStreamReader<T>
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<article class="content wrap" id="_content" data-uid="Grpc.Core.IAsyncStreamReader`1">
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<h1 id="Grpc_Core_IAsyncStreamReader_1" data-uid="Grpc.Core.IAsyncStreamReader`1" class="text-break">Interface IAsyncStreamReader<T>
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</h1>
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<div class="markdown level0 summary"><p>A stream of messages to be read.
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Messages can be awaited <code>await reader.MoveNext()</code>, that returns <code>true</code>
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if there is a message available and <code>false</code> if there are no more messages
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(i.e. the stream has been closed).
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<p>
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On the client side, the last invocation of <code>MoveNext()</code> either returns <code>false</code>
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if the call has finished successfully or throws <code>RpcException</code> if call finished
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with an error. Once the call finishes, subsequent invocations of <code>MoveNext()</code> will
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continue yielding the same result (returning <code>false</code> or throwing an exception).
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</p>
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<p>
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On the server side, <code>MoveNext()</code> does not throw exceptions.
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In case of a failure, the request stream will appear to be finished
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(<code>MoveNext</code> will return <code>false</code>) and the <code>CancellationToken</code>
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associated with the call will be cancelled to signal the failure.
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</p>
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<p>
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<code>MoveNext()</code> operations can be cancelled via a cancellation token. Cancelling
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an individual read operation has the same effect as cancelling the entire call
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(which will also result in the read operation returning prematurely), but the per-read cancellation
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tokens passed to MoveNext() only result in cancelling the call if the read operation haven't finished
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yet.
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</p></p>
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</div>
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<div class="markdown level0 conceptual"></div>
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<h6><strong>Namespace</strong>: <a class="xref" href="Grpc.Core.html">Grpc.Core</a></h6>
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<h6><strong>Assembly</strong>: Grpc.Core.Api.dll</h6>
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<h5 id="Grpc_Core_IAsyncStreamReader_1_syntax">Syntax</h5>
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<div class="codewrapper">
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<pre><code class="lang-csharp hljs">public interface IAsyncStreamReader<T></code></pre>
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</div>
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<h5 class="typeParameters">Type Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="parametername">T</span></td>
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<td><p>The message type.</p>
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</td>
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</tr>
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</tbody>
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</table>
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<h3 id="properties">Properties
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</h3>
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<a id="Grpc_Core_IAsyncStreamReader_1_Current_" data-uid="Grpc.Core.IAsyncStreamReader`1.Current*"></a>
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<h4 id="Grpc_Core_IAsyncStreamReader_1_Current" data-uid="Grpc.Core.IAsyncStreamReader`1.Current">Current</h4>
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<div class="markdown level1 summary"><p>Gets the current element in the iteration.</p>
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</div>
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<div class="markdown level1 conceptual"></div>
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<h5 class="decalaration">Declaration</h5>
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<div class="codewrapper">
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<pre><code class="lang-csharp hljs">T Current { get; }</code></pre>
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</div>
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<h5 class="propertyValue">Property Value</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="xref">T</span></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<h3 id="methods">Methods
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</h3>
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<a id="Grpc_Core_IAsyncStreamReader_1_MoveNext_" data-uid="Grpc.Core.IAsyncStreamReader`1.MoveNext*"></a>
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<h4 id="Grpc_Core_IAsyncStreamReader_1_MoveNext_CancellationToken_" data-uid="Grpc.Core.IAsyncStreamReader`1.MoveNext(CancellationToken)">MoveNext(CancellationToken)</h4>
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<div class="markdown level1 summary"><p>Advances the reader to the next element in the sequence, returning the result asynchronously.</p>
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</div>
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<div class="markdown level1 conceptual"></div>
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<h5 class="decalaration">Declaration</h5>
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<div class="codewrapper">
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<pre><code class="lang-csharp hljs">Task<bool> MoveNext(CancellationToken cancellationToken)</code></pre>
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</div>
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<h5 class="parameters">Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="xref">CancellationToken</span></td>
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<td><span class="parametername">cancellationToken</span></td>
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<td><p>Cancellation token that can be used to cancel the operation.</p>
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</td>
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</tr>
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</tbody>
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</table>
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<h5 class="returns">Returns</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="xref">Task</span><<span class="xref">System.Boolean</span>></td>
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<td><p>Task containing the result of the operation: true if the reader was successfully advanced
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to the next element; false if the reader has passed the end of the sequence.</p>
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</td>
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</tr>
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</tbody>
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</table>
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</article>
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