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Parallel.ForEach Method

.NET Framework 4

Executes a foreach (For Each in Visual Basic) operation in which iterations may run in parallel.

This member is overloaded. For complete information about this member, including syntax, usage, and examples, click a name in the overload list.

  Name Description
Public method Static member ForEach<TSource>(IEnumerable<TSource>, Action<TSource>) Executes a foreach (For Each in Visual Basic) operation on an IEnumerable<TSource> in which iterations may run in parallel.
Public method Static member ForEach<TSource>(IEnumerable<TSource>, Action<TSource, ParallelLoopState>) Executes a foreach (For Each in Visual Basic) operation on an IEnumerable<TSource> in which iterations may run in parallel, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource>(IEnumerable<TSource>, Action<TSource, ParallelLoopState, Int64>) Executes a foreach (For Each in Visual Basic) operation with 64-bit indices on an IEnumerable<TSource> in which iterations may run in parallel, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource>(OrderablePartitioner<TSource>, Action<TSource, ParallelLoopState, Int64>) Executes a foreach (For Each in Visual Basic) operation on a OrderablePartitioner<TSource> in which iterations may run in parallel and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource>(Partitioner<TSource>, Action<TSource>) Executes a foreach (For Each in Visual Basic) operation on a Partitioner<TSource> in which iterations may run in parallel.
Public method Static member ForEach<TSource>(Partitioner<TSource>, Action<TSource, ParallelLoopState>) Executes a foreach (For Each in Visual Basic) operation on a Partitioner<TSource> in which iterations may run in parallel, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource>(IEnumerable<TSource>, ParallelOptions, Action<TSource>) Executes a foreach (For Each in Visual Basic) operation on an IEnumerable<TSource> in which iterations may run in parallel amd loop options can be configured.
Public method Static member ForEach<TSource>(IEnumerable<TSource>, ParallelOptions, Action<TSource, ParallelLoopState>) Executes a foreach (For Each in Visual Basic) operation on an IEnumerable<TSource> in which iterations may run in parallel, loop options can be configured, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource>(IEnumerable<TSource>, ParallelOptions, Action<TSource, ParallelLoopState, Int64>) Executes a foreach (For Each in Visual Basic) operation with 64-bit indices on an IEnumerable<TSource> in which iterations may run in parallel, loop options can be configured, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource>(OrderablePartitioner<TSource>, ParallelOptions, Action<TSource, ParallelLoopState, Int64>) Executes a foreach (For Each in Visual Basic) operation on a OrderablePartitioner<TSource> in which iterations may run in parallel, loop options can be configured, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource>(Partitioner<TSource>, ParallelOptions, Action<TSource>) Executes a foreach (For Each in Visual Basic) operation on a Partitioner<TSource> in which iterations may run in parallel and loop options can be configured.
Public method Static member ForEach<TSource>(Partitioner<TSource>, ParallelOptions, Action<TSource, ParallelLoopState>) Executes a foreach (For Each in Visual Basic) operation on a Partitioner<TSource> in which iterations may run in parallel, loop options can be configured, and the state of the loop can be monitored and manipulated..
Public method Static member ForEach<TSource, TLocal>(IEnumerable<TSource>, Func<TLocal>, Func<TSource, ParallelLoopState, TLocal, TLocal>, Action<TLocal>) Executes a foreach (For Each in Visual Basic) operation with thread-local data on an IEnumerable<TSource> in which iterations may run in parallel, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource, TLocal>(IEnumerable<TSource>, Func<TLocal>, Func<TSource, ParallelLoopState, Int64, TLocal, TLocal>, Action<TLocal>) Executes a foreach (For Each in Visual Basic) operation with thread-local data on an IEnumerable<TSource> in which iterations may run in parallel and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource, TLocal>(OrderablePartitioner<TSource>, Func<TLocal>, Func<TSource, ParallelLoopState, Int64, TLocal, TLocal>, Action<TLocal>) Executes a foreach (For Each in Visual Basic) operation with thread-local data on a OrderablePartitioner<TSource> in which iterations may run in parallel, loop options can be configured, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource, TLocal>(Partitioner<TSource>, Func<TLocal>, Func<TSource, ParallelLoopState, TLocal, TLocal>, Action<TLocal>) Executes a foreach (For Each in Visual Basic) operation with thread-local data on a Partitioner<TSource> in which iterations may run in parallel and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource, TLocal>(IEnumerable<TSource>, ParallelOptions, Func<TLocal>, Func<TSource, ParallelLoopState, TLocal, TLocal>, Action<TLocal>) Executes a foreach (For Each in Visual Basic) operation with thread-local data on an IEnumerable<TSource> in which iterations may run in parallel, loop options can be configured, and the state of the loop can be monitored and manipulated..
Public method Static member ForEach<TSource, TLocal>(IEnumerable<TSource>, ParallelOptions, Func<TLocal>, Func<TSource, ParallelLoopState, Int64, TLocal, TLocal>, Action<TLocal>) Executes a foreach (For Each in Visual Basic) operation with thread-local data and 64-bit indices on an IEnumerable<TSource> in which iterations may run in parallel, loop options can be configured, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource, TLocal>(OrderablePartitioner<TSource>, ParallelOptions, Func<TLocal>, Func<TSource, ParallelLoopState, Int64, TLocal, TLocal>, Action<TLocal>) Executes a foreach (For Each in Visual Basic) operation with 64-bit indices and with thread-local data on a OrderablePartitioner<TSource> in which iterations may run in parallel , loop options can be configured, and the state of the loop can be monitored and manipulated.
Public method Static member ForEach<TSource, TLocal>(Partitioner<TSource>, ParallelOptions, Func<TLocal>, Func<TSource, ParallelLoopState, TLocal, TLocal>, Action<TLocal>) Executes a foreach (For Each in Visual Basic) operation with thread-local data on a Partitioner<TSource> in which iterations may run in parallel, loop options can be configured, and the state of the loop can be monitored and manipulated.
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TPL is Awesome.....examples?
$0 I found a good one with integers here, but I want to re-factor a bit and use string results instead... $0 $0http://msdn.microsoft.com/en-us/library/dd997393.aspx$0 $0$0 $0 $0 $0For example, how would I convert this to parallel?$0 $0 $0$0 $0Imports System.Threading$0 $0Imports System.Threading.Tasks$0 $0$0 $0 $0Module ForEachThreadLocal$0 $0    Sub Main()$0 $0        Dim servers() As String = System.IO.File.ReadAllLines("servers.txt")$0 $0        Dim Results As String = ""$0 $0        For Each server In servers$0 $0            results &= myfunction(server)$0 $0        Next$0 $0$0 $0System.IO.File.AppendAllText("results.txt", results)$0 $0$0 $0 $0    End Sub$0 $0$0 $0 $0 $0    Function myfunction(ByVal servername As String)$0 $0        Dim retstr As String = ""$0 $0        'do work$0 $0        Return retstr$0 $0    End Function$0 $0 $0End Module$0 $0
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