Rash thoughts about .NET, C#, F# and Dynamics NAV.

"Every solution will only lead to new problems."

Tuesday, 13. October 2009

Redirecting process output in F#

Filed under: F# — Steffen Forkmann at 16:03 Uhr

Today I had some trouble to redirect the default and error output from a created process. So here is my final solution:

  open System.Diagnostics

  open System.Threading


  // outputF: string -> unit

  // errorF: string -> unit

  let runProcess outputF errorF =

    use p = new Process()

    p.StartInfo.UseShellExecute <- false

    // …

    p.StartInfo.RedirectStandardOutput <- true

    p.StartInfo.RedirectStandardError <- true



      (fun d –> if  d.Data <> null then errorF d.Data)


      (fun d –> if d.Data <> null then outputF d.Data)

    p.Start() |> ignore








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