{"id":55919,"date":"2010-04-15T09:00:00","date_gmt":"2010-04-15T09:00:00","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/pfxteam\/2010\/04\/15\/parallelextensionsextras-tour-11-paralleldynamicinvoke\/"},"modified":"2010-04-15T09:00:00","modified_gmt":"2010-04-15T09:00:00","slug":"parallelextensionsextras-tour-11-paralleldynamicinvoke","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/dotnet\/parallelextensionsextras-tour-11-paralleldynamicinvoke\/","title":{"rendered":"ParallelExtensionsExtras Tour – #11 – ParallelDynamicInvoke"},"content":{"rendered":"

<\/p>\n

(The full set of ParallelExtensionsExtras Tour posts is available <\/em>here<\/em><\/font><\/a>.)<\/em> <\/font><\/font><\/p>\n

Delegates in .NET may have one or more methods in their invocation list.  <\/span>When you invoke a delegate, such as through the Delegate.DynamicInvoke method, the net result is that all of the methods in the invocation list get invoked, one after the other.  <\/span>Of course, in a parallel world we might want to invoke all of the methods in the invocation list in parallel instead of sequentially. The DelegateExtensions.cs file in ParallelExtensionsExtras<\/a> provides an extension method on Delegate that does just that. <\/p>\n

<\/font><\/p>\n

public static object ParallelDynamicInvoke(<\/p>\n

<\/font><\/p>\n

    <\/span>this Delegate multicastDelegate, params object[] args)<\/p>\n

<\/font><\/p>\n

{<\/p>\n

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    <\/span>return multicastDelegate.GetInvocationList()<\/p>\n

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           <\/span>.AsParallel().AsOrdered()<\/p>\n

<\/font><\/p>\n

           <\/span>.Select(d => d.DynamicInvoke(args))<\/p>\n

<\/font><\/p>\n

           <\/span>.Last();<\/p>\n

<\/font><\/p>\n

}<\/p>\n

<\/font><\/p>\n

\n

 <\/font><\/p>\n<\/p>\n

This ParallelDynamicInvoke extension method accepts the target multicast delegate as well as the params array to provide to the delegate invocation, just as with Delegate.DynamicInvoke:<\/p>\n

<\/font><\/font><\/p>\n

public object DynamicInvoke(params object[] args);<\/p>\n

<\/font><\/p>\n

\n

 <\/font><\/p>\n<\/p>\n

ParallelDynamicInvoke uses the delegate’s GetInvocationList method to retrieve an array of all of the methods in the invocation list, each of which is represented as a Delegate.  <\/span>Then, PLINQ is used to invoke each individual delegate, returning the last delegate’s result.<\/p>\n

<\/font><\/font><\/p>\n

<\/font><\/p>\n","protected":false},"excerpt":{"rendered":"

(The full set of ParallelExtensionsExtras Tour posts is available here.)  Delegates in .NET may have one or more methods in their invocation list.  When you invoke a delegate, such as through the Delegate.DynamicInvoke method, the net result is that all of the methods in the invocation list get invoked, one after the other.  Of course, in […]<\/p>\n","protected":false},"author":360,"featured_media":58792,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7908],"tags":[7907,7911,7909,7924,7910],"class_list":["post-55919","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pfxteam","tag-net-4","tag-code-samples","tag-parallel-extensions","tag-parallelextensionsextras","tag-plinq"],"acf":[],"blog_post_summary":"

(The full set of ParallelExtensionsExtras Tour posts is available here.)  Delegates in .NET may have one or more methods in their invocation list.  When you invoke a delegate, such as through the Delegate.DynamicInvoke method, the net result is that all of the methods in the invocation list get invoked, one after the other.  Of course, in […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/posts\/55919","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/users\/360"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/comments?post=55919"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/posts\/55919\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/media\/58792"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/media?parent=55919"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/categories?post=55919"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/tags?post=55919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}