ResourceIDHelper.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Shared / MS / Internal / ResourceIDHelper.cs / 1305600 / ResourceIDHelper.cs
                        

                        
                             
using System;
using System.Text;
using System.Globalization;
 
namespace MS.Internal
{ 
    internal static class ResourceIDHelper { 

        // 
        // Convert relative path to the right format which is used
        // as ResourceID.
        // MarkupCompiler, ResXGen, Loader will call this method internally.
        // 
        static internal string GetResourceIDFromRelativePath(string relPath)
        { 
            // It is important that relPath not contain a fragment or query at this point 
            //
            // Currently this will always be true because 
            // 1) The resources listed in the .proj file are tested against the filesystem
            //    to see if they exist.  If a query or fragment was present this test would fail.
            // 2) In the new loader the container apis make sure that the fragment and query are
            //    stripped from the Uri to form the part name which is used to load the resource 
            Uri baseUri = new Uri("http://foo/");
            Uri srcUri = new Uri(baseUri, relPath.Replace("#", "%23")); 
 
            return GetResourceIDFromUri(baseUri, srcUri);
        } 

        //
        // This is the central place that returns right ResourceID for
        // the passed SourceUri. 
        //
        static private string GetResourceIDFromUri(Uri baseUri, Uri sourceUri) 
        { 
            string resourceID = String.Empty;
 
            //
            // Extracts and returns the resource ID from a URI.
            // If the source URI is under the baseUri, the resource ID is the URI
            // after the baseUri and any fragment or query has been removed. 
            // The resource ID is always converted to lower case.
            // 
            // If the sourceUri is not relative to baseUri, Emtpy string is returned 
            // as resource id.
            // 
            if (baseUri.IsAbsoluteUri == false || sourceUri.IsAbsoluteUri == false)
            {
                 //
                 // if any passed Uri is not absolute uri, return empty string here. 
                 //
                 return resourceID; 
            } 

 
            if (baseUri.Scheme == sourceUri.Scheme && baseUri.Host == sourceUri.Host)
            {
                //
                // Get the escaped Path part, Path doesn't include Query and Fragment. 
                //
                string basePath = baseUri.GetComponents(UriComponents.Path, UriFormat.UriEscaped); 
                string sourcePath = sourceUri.GetComponents(UriComponents.Path, UriFormat.UriEscaped); 

                // 
                // Always lower case the Path string.
                //
                basePath = basePath.ToLower(CultureInfo.InvariantCulture);
                sourcePath = sourcePath.ToLower(CultureInfo.InvariantCulture); 

                if (sourcePath.StartsWith(basePath, StringComparison.OrdinalIgnoreCase)) 
                { 
                   resourceID = sourcePath.Substring(basePath.Length);
                } 
            }

            return resourceID;
 
        }
 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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