c# - Run a R Script from asp.net application and get the output from r -

i need run r script stored in folder asp.net application , show output of r script in web page.

below code of default.aspx.cs file

using rdotnet;    using system; using system.collections.generic; using system.io; using system.linq; using system.web; using system.web.ui; using system.web.ui.webcontrols;  public partial class _default : system.web.ui.page {     protected void page_load(object sender, eventargs e)     {     }      private static double evaluateexpression(rengine engine, string expression)     {         var expressionvector = engine.createcharactervector(new[] { expression });         engine.setsymbol("expr", expressionvector);          //  wrong -- need parse expression before evaluation         //var result = engine.evaluate("eval(expr)");          //  right way this!!!         var result = engine.evaluate("eval(parse(text=expr))");         var ret = result.asnumeric().first();          return ret;     }      public static void setuppath(string rversion = "r-3.2.1")     {         var oldpath = system.environment.getenvironmentvariable("path");         var rpath = system.environment.is64bitprocess ?                                string.format(@"c:\program files\r\{0}\bin\x64", rversion) :                                string.format(@"c:\program files\r\{0}\bin\i386", rversion);          if (!directory.exists(rpath))             throw new directorynotfoundexception(               string.format(" r.dll not found in : {0}", rpath));         var newpath = string.format("{0}{1}{2}", rpath,                                      system.io.path.pathseparator, oldpath);         system.environment.setenvironmentvariable("path", newpath);     }      protected void button1_click(object sender, eventargs e)     {         setuppath();         rengine.setenvironmentvariables();          rengine engine = rengine.getinstance();         // rengine requires explicit initialization.         // can set parameters.         engine.initialize();         string path = server.mappath("~/r script/rscript.r");         engine.evaluate("source('" + path + "')");         label1.text = evaluateexpression(engine, "c").tostring();     } } 

the rscript.r script file has below simple coding

c<-sum(1,2,3,4) 

the operation such way have button , when click button, r script in folder needs executed , result value needs displayed in label have in web page. have file rscript.r in web applications folder , getting pulled correctly.

when click on button code gets executed , web application throwing error

attempted read or write protected memory. indication other memory corrupt.

i tried google out not helpful. there way execute r file directly asp.net web application , output of executed file.

can me out?

i used rscriptrunner , solution got fixed. created class file rscriptrunner , called function in button click event.

rscriptrunner can execute r script using rscript.exe in commandline mode.

however not able output result r code.