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Problem with opening web.config file

    Question

  • Ok, i need help with this code. 
    string a = "/WebSite1";  
    Configuration b = WebConfigurationManager.OpenWebConfiguration(a); 
    This is what i get:
                 ConfigurationErrorsException was unhandled by user code
                 An error occurred loading a configuration file: Failed to map the path '/'.

    Appreciate any help
    Sunday, December 07, 2008 6:19 PM

Answers

All replies

  • Hello eerojms,
        I believe that is the wrong sort of slash for a file location; try a backslash (\) instead. If that doesn't work, try two backslashes (\\).

    Hope this helps!
    Thanks!
    chukrum47
    How are a plum and a rabbit similar? They're both purple, except for the rabbit.
    • Proposed as answer by Adjutor Sunday, December 07, 2008 9:27 PM
    • Unproposed as answer by eerojms Sunday, December 07, 2008 9:32 PM
    Sunday, December 07, 2008 6:27 PM
  • Hello,

    You can also use a @ in front of your string and only one '\' would be required:

    string a = @"\WebSite1";     
    Configuration b = WebConfigurationManager.OpenWebConfiguration(a);    
     

    Best Regards,

    Adjutor
    Sunday, December 07, 2008 9:26 PM
  • Nop, thanks, but i've tried it before and this is not a solution!
    Sunday, December 07, 2008 9:27 PM
  • try wrapping the code in a try / catch block and supply the entire error, might be caused by access violations etc.
    Sunday, December 07, 2008 9:40 PM
  • eerojms,

    Try this:

        Shared Sub OpenWebConfiguration1()  
            ' Get the configuration object for a Web application  
            ' running on the local server.   
            Dim config As System.Configuration.Configuration = _  
            System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("/configTest")  
     
            ' Get the appSettings.  
            Dim appSettings As KeyValueConfigurationCollection = _  
            config.AppSettings.Settings  
     
            ' Loop through the collection and  
            ' display the appSettings key, value pairs.  
            Console.WriteLine("[appSettings for app at: {0}]""/configTest")  
            Dim key As String 
            For Each key In appSettings.AllKeys  
                Console.WriteLine("Name: {0} Value: {1}", _  
                key, appSettings(key).Value)  
            Next key  
     
            Console.WriteLine()  
     
        End Sub 

    Best Regards,

    Adjutor
    Sunday, December 07, 2008 9:55 PM
  • Thanks Adjutor, but i'm using C#. And all i want to do is, that my code could open the configuration file.
    I tried try / catch:

    System.Configuration.ConfigurationErrorsException: An error occurred loading a configuration file: Failed to map the path '/'. ---> System.InvalidOperationException: Failed to map the path '/'. 
    at System.Web.Configuration.ProcessHostConfigUtils.MapPathActual(String siteName, VirtualPath path)
    at System.Web.Configuration.ProcessHostMapPath.MapPathCaching(String siteID, VirtualPath path)
    at System.Web.Configuration.ProcessHostMapPath.GetPathConfigFilenameWorker(String siteID, VirtualPath path, String& directory, String& baseName)
    at System.Web.Configuration.ProcessHostMapPath.System.Web.Configuration.IConfigMapPath.GetPathConfigFilename(String siteID, String path, String& directory, String& baseName)
    at System.Web.Configuration.HostingPreferredMapPath.GetPathConfigFilename(String siteID, String path, String& directory, String& baseName)
    at System.Web.Configuration.WebConfigurationHost.GetStreamName(String configPath)
    at System.Configuration.Internal.DelegatingConfigHost.GetStreamName(String configPath)
    at System.Configuration.BaseConfigurationRecord.InitConfigFromFile() --- End of inner exception stack trace ---
    at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
    at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
    at System.Configuration.Configuration..ctor(String locationSubPath, Type typeConfigHost, Object[] hostInitConfigurationParams)
    at System.Configuration.Internal.InternalConfigConfigurationFactory.System.Configuration.Internal.IInternalConfigConfigurationFactory.Create(Type typeConfigHost, Object[] hostInitConfigurationParams)
    at System.Web.Configuration.WebConfigurationHost.OpenConfiguration(WebLevel webLevel, ConfigurationFileMap fileMap, VirtualPath path, String site, String locationSubPath, String server, String userName, String password, IntPtr tokenHandle)
    at System.Web.Configuration.WebConfigurationManager.OpenWebConfigurationImpl(WebLevel webLevel, ConfigurationFileMap fileMap, String path, String site, String locationSubPath, String server, String userName, String password, IntPtr userToken)
    at System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(String path)
    at _Default.Page_Load(Object sender, EventArgs e) in f:\Users\eerojms\Documents\Visual Studio 2008\WebSites\WebSite1\Default.aspx.cs:line 21
    Monday, December 08, 2008 5:53 AM
  • try this

    string a="~/WebSite1/"

    I'd like to meet some friends who develop c# . My ICQ:422269376
    Monday, December 08, 2008 2:18 PM
  • Hi eerojms,

    I know you have said that you have tried a try/catch statement, but have you tried using this to check to see if the File Exists to begin with.


    string a = @"\WebSite1";  
      
    if (File.Exists(a))  
    {  
      Configuration b = WebConfigurationManager.OpenWebConfiguration(a);   
    }  
    else  
    {  
      MessageBox.Show("File Not Found""File Not Found");  
     


    Yours,
    Scott

    We all have to start some place - I just don't know where yet!
    Monday, December 08, 2008 2:32 PM
  • Hello,

    Sorry, I forgot this was the C# forum :).  However, the idea behind the code I posted is the same for both VB.NET and C#.

    Best Regards,

    Adjutor
    Monday, December 08, 2008 2:55 PM
  • Yup Scott, the file exists.
    It throws:
      'F:\Users\eerojms\Documents\Visual Studio 2008\WebSites\WebSite1\web.config' is not a valid virtual path.

    Adjutor, no worries. I got your idea and found the code in C#
    Monday, December 08, 2008 3:19 PM
  • If web.config is on the root of your wbesite you should get it like this - WebConfigurationManager.OpenWebConfiguration(null)

    This link should help
    http://msdn.microsoft.com/en-us/library/610xe886(VS.85).aspx
    • Marked as answer by eerojms Monday, December 08, 2008 6:42 PM
    • Unmarked as answer by eerojms Monday, December 08, 2008 7:04 PM
    Monday, December 08, 2008 3:33 PM
  •  Nop, it's not root. It's local web.config file
    Monday, December 08, 2008 7:05 PM
  • xiaobin700 said:

    try this

    string a="~/WebSite1/"
    Configuration b = WebConfigurationManager.OpenWebConfiguration(a); 

    I'd like to meet some friends who develop c# . My ICQ:422269376



    this will work ,trust me , In asp.net "~" symbol means the root of your web site.
    I'd like to meet some friends who develop c# . My ICQ:422269376
    Tuesday, December 09, 2008 1:05 PM
  • no, i believe that the issue is not with the directory.
    I've tried other codes also to encrypt connectionString and i've always that message:

    System.Configuration.ConfigurationErrorsException: An error occurred loading a configuration file: Failed to map the path '/'. ---> System.InvalidOperationException: Failed to map the path '/'.  and so on.
    Tuesday, December 09, 2008 1:48 PM
  •  Check this link plz,
    http://cs.rthand.com/blogs/blog_with_righthand/archive/2007/12/01/WebConfigurationManager.OpenWebConfiguration-throws-Failed-to-map-the-path-_27002F0027002E00_.aspx

    And plz let us know if the problem still exists.
    It seems that your code has no problem as same code is running in my system without any kinds of problem.


    Plz mark as answer if this post is usefull.
    • Marked as answer by Harry Zhu Monday, December 15, 2008 8:17 AM
    Thursday, December 11, 2008 6:06 AM
  • Harry Zhu, are there any patches for Visual Studio 2008 so this error doesn't occur?  When running Visual Studio 2008 as an Administrator the issue doesn't occur.  Running VS 2008 without the Administrator privilege causes the error.

    Thanks!
    Monday, August 31, 2009 2:14 PM
  • hi Try this,

    Private Sub authorization()

    Try Dim action As AuthorizationRuleAction = AuthorizationRuleAction.Deny

    Dim authorizationRule = New System.Web.Configuration.AuthorizationRule(action) authorizationRule.Action = AuthorizationRuleAction.Allow authorizationRule.Users.Add("userName") authorizationRule.Roles.Add("US") authorizationRule.Verbs.Add("POST")

    Dim configuration As System.Configuration.Configuration = OpenConfigFile("tanner")

     Dim authorizationSection As AuthorizationSection = CType(configuration.GetSection("system.web/authorization"), AuthorizationSection)

    Catch ex As Exception Throw ex

    End Try

    End Sub

    Public Shared Function

    OpenConfig(ByVal Path As String) As Configuration

    Dim FileName As New FileInfo(Path)

    Dim virtualDir As New VirtualDirectoryMapping(FileName.DirectoryName, True, FileName.Name)

    Dim WebConfig As New WebConfigurationFileMap()

    WebConfig.VirtualDirectories.Add("/", virtualDir)

    Return WebConfigurationManager.OpenMappedWebConfiguration(WebConfig, "/") End Function

    wish you Best coding Dileep Kumar www.active-technologies.net
    • Proposed as answer by dil123 Sunday, September 19, 2010 6:46 PM
    Sunday, September 19, 2010 6:35 PM
  • Run the visual studio as an administrator. It work for me :D
    Saturday, November 13, 2010 8:54 PM
  • Great!! Worked for me, when run as administrator. Thanks, saved my day.

    Friday, May 06, 2011 4:27 PM
  • Thanks for the solution, it worked in my case....
    Wednesday, September 14, 2011 6:04 AM
  • Ok, i need help with this code. 
    string a = "/WebSite1";  
    Configuration b = WebConfigurationManager.OpenWebConfiguration(a); 
    This is what i get:
                 ConfigurationErrorsException was unhandled by user code
                 An error occurred loading a configuration file: Failed to map the path '/'.

    Appreciate any help

     This is not an error, this exception occurs when you try to open any config file WITHOUT administrator role. So to get rid of this exception simple open user solution under administrator account. That's it.

    Hopefully, this will solve your problem.

    VB

     
    Friday, August 29, 2014 7:01 PM
  • Hi,

    To get the location of the config file you can do the following:

    AppDomain.CurrentDomain.SetupInformation.ConfigurationFile

    If you want a reference to the file then you could do:

    ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

    If this answer your question, please mark as an answer


    João Sousa (MCTS) Senior Software Engineer

    Monday, September 01, 2014 11:11 PM