Server.Mappath in C# classlibrary

Question

How can i use the server.mappath method in a C# class library class ,which acts as my BusinessLayer for My ASP.NET WEbsite

score 122 · Accepted Answer · answered Jul 29 '09 at 11:14

122

By calling it?

var path = System.Web.HttpContext.Current.Server.MapPath("default.aspx");

Make sure you add a reference to the System.Web assembly.

answered Jul 29 '09 at 11:14

Aaron Powell

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i should say that system.web assembly does not exist in .net framework 4 – Arash Sep 30 '12 at 08:04
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The worst solution! What if we need to use Business Layer classes out of HTTP Context? – Sergey Metlov Oct 29 '12 at 20:11
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Here is the right answer http://stackoverflow.com/questions/12294458/asp-net-mvc-4-use-server-mappath-in-business-layer – Sergey Metlov Oct 29 '12 at 20:13
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This answer is both not portable (outside of web applications) and not testable in unit tests. I agree with Ninja here. You can use IOC to inject the value, perhaps with an interface. – Trevor de Koekkoek Nov 17 '12 at 22:50

score 25 · Answer 2 · answered Dec 04 '13 at 05:25

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You can get the base path by using the following code and append your needed path with that.

string  path = System.AppDomain.CurrentDomain.BaseDirectory;

answered Dec 04 '13 at 05:25

Elanchezhian Narayanasamy

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score 7 · Answer 3 · answered Jul 29 '09 at 11:14

7

You should reference System.Web and call:

  HttpContext.Current.Server.MapPath(...)

answered Jul 29 '09 at 11:14

Philippe Leybaert

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score 7 · Answer 4 · edited Aug 01 '17 at 18:13

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Use this System.Web.Hosting.HostingEnvironment.MapPath().

HostingEnvironment.MapPath("~/file")

Wonder why nobody mentioned it here.

edited Aug 01 '17 at 18:13

James Skemp

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answered Jan 05 '16 at 12:19

Mahmood Dehghan

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What's the difference between this and System.Web.HttpContext.Current.Server.MapPath ? I couldn't find any thing concrete between the two – Raj Kumar Feb 19 '20 at 08:43

score 4 · Answer 5 · answered Apr 08 '12 at 16:24

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Maybe you could abstract this as a dependency and create an IVirtualPathResolver. This way your service classes wouldn't be bound to System.Web and you could create another implementation if you wanted to reuse your logic in a different UI technology.

answered Apr 08 '12 at 16:24

Tom Miller

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score 2 · Answer 6 · edited Jun 28 '18 at 14:01

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HostingEnvironment.MapPath
System.Web.Hosting.HostingEnvironment.MapPath(path);

edited Jun 28 '18 at 14:01

Mohamad Shiralizadeh

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answered Jul 26 '16 at 11:16

Sachin Panchal

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score 2 · Answer 7 · answered Sep 06 '17 at 06:49

Architecturally, System.web should not be referred in Business Logic Layer (BLL). Employ BLL into the solution structure to follow the separate of concern principle so refer System.Web is a bad practice. BLL should not load/run in Asp.net context. Because of the reason you should consider using of System.AppDomain.CurrentDomain.BaseDirectory instead of System.Web.HttpContext.Current.Server.MapPath

Server.Mappath in C# classlibrary

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