server.mappath null [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:

HttpContext.Current.Server null

I have three projects in my ASP .NET solution:

• a class library
• a web application
• a windows service

I have a folder in my web application with an XML file. An XMLreader from class library function needs to be populated with this XML file. I have added this:

var reader = XmlReader.Create(HttpContext.Current.Server.MapPath("~/TestDevice/Data.xml"), settings);

When this function is called from we application, It works. When this function of class library is called from windows application, I get null reference at HttpContext.Current.Server because it is not available in windows application. I don't want to give hardcode path although that works for both windows and web application. Can I use some don't function to access files from different projects or any alternate of server.mappath. Please suggest solu开发者_运维知识库tion

Thanks

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System.AppDomain.CurrentDomain.BaseDirectory should do the trick.

http://msdn.microsoft.com/en-us/library/system.appdomain.basedirectory.aspx

Gets the base directory that the assembly resolver uses to probe for assemblies.

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HttpContext.Current.Server.MapPath alternative in windows application

file path using C#

HttpContext.Current.Server null

Asking the same basic question four different times isn't going to change the fact that you cannot use a Windows Service to access the web application path and the web app isn't going to know where your service is.

Use a configuration file to define where your data will be stored and provide the same info to both - or use some other storage for your data like a database which has a published location.

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The simplest solution is probably to pass the path to the xml file into that function, rather than making the function itself clever enough to figure it out- then your web app could use the HttpContext method, and the Winforms app would use a regular path. There is no equivalent of the MapPath method for WinForms or windows services.