如何在web.config文件中获取相对路径

Question

I searched around stackoverflow on how to make a relative file and have tried various things and it hasn't worked, and i was hoping to see if you guys could help me out.

here is my connection sting in my web.config file:

 <add name="2007 Database  05-12-2013(Esfahanian's conflicted copy 2013-06-24)
  ConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data 
  Source=" providerName="System.Data.OleDb"/>

and here relative path in my aspx file:

<script runat="server">
    string connectionString = ConfigurationManager
    .ConnectionStrings["2007 Database 
    05-12-2013(Esfahanian's conflicted copy 2013-06-24) ConnectionString"]
   .ConnectionString + Server.MapPath("..\..\Anderson\2007 
    Database 05-12-2011 (Esfahanian's conflicted copy 2013-06-24).mdb");
</script>

And I get this error: CS1009: Unrecognized escape sequence

So what exactly am I doing wrong

Answer 1

You aren't escaping the "\\" character in your path so it is causing an error in the MapPath() method.

Change this:

Server.MapPath("..\\..\\Anderson\\2007 Database 05-12-2011 (Esfahanian's conflicted copy 2013-06-24).mdb"

to this:

Server.MapPath(@"..\\..\\Anderson\\2007 Database 05-12-2011 (Esfahanian's conflicted copy 2013-06-24).mdb"

or this:

Server.MapPath("..\\\\..\\\\Anderson\\\\2007 Database 05-12-2011 (Esfahanian's conflicted copy 2013-06-24).mdb"

Answer 2

You are using \\ in your path string but thats the symbol for literal. So any char following the \\ will be inturpreted as a literal like \\. is not a valid char. You actualy want the literal \\ the sequence for which is \\\\ Also @ infront of a string tells that you dont want literals.

So mappath(" needs to be mappath(@" or every \\ needs to become \\\\