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