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omegapro/PowerTools/Classes/CustomXmlAccessor.cs

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+/***************************************************************************
+
+Copyright (c) Microsoft Corporation 2011.
+
+This code is licensed using the Microsoft Public License (Ms-PL).  The text of the license can be found here:
+
+http://www.microsoft.com/resources/sharedsource/licensingbasics/publiclicense.mspx
+
+***************************************************************************/
+
+using System;
+using System.Linq;
+using System.Xml.Linq;
+using DocumentFormat.OpenXml.Packaging;
+
+namespace OpenXmlPowerTools
+{
+    /// <summary>
+    /// Performs operations on document custom xml
+    /// </summary>
+    public class CustomXmlAccessor{
+        /// <summary>
+        /// Searches for a custom Xml part with a given name
+        /// </summary>
+        /// <param name="xmlPartName">Name of custom Xml part</param>
+        /// <returns>XDocument with customXml part loaded</returns>
+        public static XDocument Find(WmlDocument doc, string xmlPartName)
+        {
+            using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
+            {
+                WordprocessingDocument document = streamDoc.GetWordprocessingDocument();
+                string partName = "/" + xmlPartName;
+                var customXmlPart =
+                    document.MainDocumentPart.CustomXmlParts.Where(
+                        t => t.Uri.OriginalString.EndsWith(partName, System.StringComparison.OrdinalIgnoreCase)
+                    ).FirstOrDefault();
+                if (customXmlPart == null)
+                    throw new ArgumentException("Part name '" + xmlPartName + "' not found.");
+                return customXmlPart.GetXDocument();
+            }
+        }
+
+        /// <summary>
+        /// Replaces a previously existing customXml part by another one
+        /// </summary>
+        /// <param name="customXmlDocument">XDocument of part to replace inside the document package</param>
+        /// <param name="partNameOnly">Name of the part.</param>
+        public static OpenXmlPowerToolsDocument SetDocument(WmlDocument doc, XDocument customXmlDocument, string partNameOnly)
+        {
+            using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
+            {
+                using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
+                {
+                    string partName = "/" + partNameOnly;
+                    var customXmlPart = document.MainDocumentPart.CustomXmlParts.Where(
+                            t => t.Uri.OriginalString.EndsWith(partName, System.StringComparison.OrdinalIgnoreCase)
+                        ).FirstOrDefault();
+
+                    if (customXmlPart == null)
+                        customXmlPart = document.MainDocumentPart.AddCustomXmlPart(CustomXmlPartType.CustomXml);
+                    customXmlPart.PutXDocument(customXmlDocument);
+                }
+                return streamDoc.GetModifiedDocument();
+            }
+        }
+    }
+}