CODEWITHSUNDEEP
c#
user3748973
user3748973

Reputation: 459

c# Could not find a part of the path with Server.MapPath()

Why using Server.MapPath() causing the following error:

Could not find a part of the path 'c:\wwwroot\currentuser\example.com\wwwroot\SomeFolder\myFiles\'.

Here is my code : 

 public ActionResult Index(int? page, string sort, string filter)
 {
     try
     {
         string path1 = Path.Combine(Server.MapPath("~/SomeFolder/myFiles/"));
         if (!System.IO.File.Exists(path1))
         {
             string createText = "Hello and Welcome" + Environment.NewLine;
             System.IO.File.WriteAllText(path1, createText);
         }

     }
     catch (Exception ex)
     {
        throw new Exception("HomeController/save text to  file: " + ex.Message, ex);
     }
 }

And here is stacktrace:

ErrorMessage: HomeController/save text to file: Could not find a part of the path 'c:\wwwroot\currentuser\example.com\wwwroot\SomeFolder\myFiles\'.<br/>
InnerException: Could not find a part of the path 'c:\wwwroot\currentuser\example.com\wwwroot\SomeFolder\myFiles\'.
StackTrace:    at myProject.Controllers.HomeController.Index()
   at lambda_method(Closure , ControllerBase , Object[] )
   at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.<>c__DisplayClass2b.<BeginInvokeAction>b__1c()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult)
   at System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Date :11/19/2017 9:27:50 AM

----------------------------------

How can I fix it?

Upvotes: 0

Views: 1069

Answers (1)

Caius Jard
Caius Jard

Reputation: 74700

Your code seems a bit buggy

You've got a Path.Combine In there but only one folder path as an argument- it'll work but combine is for combining path parts. Are you sure there's no path part missing, like more folders, or a file name?

Next, you Server.MapPath to a folder, but check its existence with File.Exists - This won't work, either make it a path to a file, or check it with Directory.Exists

Server.MapPath doesn't care about non existing folders and files. It simply tells you what the absolute path would be for the relative file you pass it. It doesn't check anything about it. If you plan to write a file to this path, you can safely call Directory.CreateDirectory on it first to ensure the directory exists before writing the file to it. If the dir already exists, this call is a non-op. For example:

var fullPath= Server.MapPath("/non/existing/folders/");
Directory.CreateDirectory(fullPath);
fullPath=Path.Combine(fullPath,"newfile.txt");
File.WriteAllText(fullPath, content);

Upvotes: 2

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