I'm working on a standard name/address web app for permitting users to update their personal information.
The client wants to provide forced-choice options for certain fields in the active directory user object. He gave me some Excel files that I changed to XML files which the dropdown controls on the web form access. For example, he wants people to choose their "Department" field from a fixed list. Simple enough.
To improve the look/feel of the app I needed to have the webpage code to actually read that XML file to do a lookahead and pre-load a dropdown list position, but it was difficult to tell the codebehind code where exactly to look.
The solution was to preface the name of the XML file that I needed to read with the value "Request.PhysicalApplicationPath" -- that points it directly into the directory on the web server.
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Some excellent websites on this topic include: http://www.west-wind.com/weblog/posts/132081.aspx and http://msdn.microsoft.com/en-us/library/ms178116.aspx
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