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Using MapPath with WCF Service, Setting aspNetCompatibilityEnabled to true

Updated: at 02:12 PM

I'm just starting out using WCF in an application for the first time.  I'm using Visual Studio 2008 sp1 and created an web site from the standard create project wizard.  I then created a simple AJAX--enabled WCF Service as follows:


I then added some code to the service that looks like the following (using MapPath):

[ServiceContract(Namespace = "")]

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]

public class TrackData

{ // Add [WebGet] attribute to use HTTP GET [OperationContract]

<span class="kwrd">public</span> List&lt;TrackDataList&gt; RetrieveTrackDataByLap(<span class="kwrd">int</span> excerciseId, <span class="kwrd">int</span> lapNumberToShow)

    var listTrackData = <span class="kwrd">new</span> List&lt;TrackDataList&gt;();

    <span class="kwrd">string</span> fileName = HttpContext.Current.Server.MapPath(<span class="str">&quot;~/App_Data/sample.tcl&quot;</span>);

    Activity activity = GarminUtils.ConvertTCS(fileName);

I call it with JavaScript as follows:

/// <reference path=“MapLive.aspx” />

/// <reference path=“../VEJS/VeJavaScriptIntellisenseHelper.js” />

function pageLoad() {

TrackData.RetrieveTrackDataByLap(0, 0, OnRetrieveTrackDataByLapComplete);


function OnRetrieveTrackDataByLapComplete(TrackDataList) {

alert(<span class="str">'OnRetrieveTrackDataByLapComplete called'</span>);


And, I'm surprised to find that I get a JavaScript error saying MapPath is undefined.  So, after a little digging I discover that I need to set aspNetCompatibilityEnabled to true in my web.config as follows:


By default, it is set to false.  Hope this Helps!

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