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   public static string GetKeyCustomXmlPart()
        {
            try
            {
                string PathCopy = @"C:\TOTO";
                Microsoft.Office.Interop.Word.Document doc = Globals.ThisAddIn.Application.ActiveDocument;
                object d = "";
                //doc.Unprotect(ref d);
                doc.SaveAsQuickStyleSet(PathCopy);
 
                int Flag = 0;
                Uri uritarget;
                using (Package packageword = Package.Open(@"C:\TOTO.dotx", FileMode.Open, FileAccess.ReadWrite))
                {
                    for (int i = 1; true; i++)
                    {
                        if (Flag != 1)
                            uritarget = new Uri("/customXml/item" + i.ToString() + ".xml", UriKind.Relative);
                        else
                            uritarget = new Uri("/customXml/itemProps" + (i - 1).ToString() + ".xml", UriKind.Relative);
 
                        if (packageword.PartExists(uritarget))
                        {
                            IEnumerator<PackagePart> relEnum = packageword.GetParts().GetEnumerator();
                            relEnum.MoveNext();
                            PackagePart sd = packageword.GetPart(uritarget);
                            XmlDocument mainDoc = new XmlDocument();
                            mainDoc.Load(sd.GetStream());
                            if (Flag == 1)
                            {
                                packageword.Flush();
                                packageword.Close();
                                File.Delete(@"C:\TOTO.dotx");
                                return mainDoc["ds:datastoreItem"].Attributes.Item(0).Value;
                            }
/* il faut definir votre xmlns="info" ou autre*/
                            else if (mainDoc.FirstChild.Attributes.Item(0).Value.Equals("info")) 
                                Flag = 1;
                        }
                        else
                            break;
                    }
                    packageword.Flush();
                    packageword.Close();
                    File.Delete(@"C:\TOTO.dotx");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error :" + ex.TargetSite.Name + "\n" + ex.Message);
            }
            return String.Empty;
        }
 
 
     public static void AddCustomXMLPart()
        {
            string CustomXmlStr = "<exemple xmlns='info'></exemple>";
            if (!CustomXmlKey.Equals(String.Empty))
                DelCustomXMLPart();
            try
            {
                Microsoft.Office.Interop.Word.Document ActiveDocument = Globals.ThisAddIn.Application.ActiveDocument;
                Microsoft.Office.Core.CustomXMLPart CustomXml = ActiveDocument.CustomXMLParts.Add(String.Empty, new Microsoft.Office.Core.CustomXMLSchemaCollectionClass());
                CustomXml.LoadXML(CustomXmlStr);
                CustomXmlKey = CustomXml.Id;
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error :" + ex.TargetSite.Name + "\n" + ex.Message);
            }
        } |