環境：
Office Professional 2007 Beta 2
VSTO v3 JuneCTP

（→ このサンプルの Beta2TR 及び VSTO 2005 SE Beta 版は、ここ を参照してください）

こんにちは、松崎です。

2006/07/25 に実施予定の Beta Experience セミナーでご紹介するサンプルコードを Orland からアップします。
コードの詳細は、Beta Experience セミナーをご覧ください。

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カスタムタスクペインの表示

/** リボンなどから表示の切り替えをおこなう場合などは、下記の Visible の値を状態に応じて変更してください **/

        public UserControl1 myControl;
        public Microsoft.Office.Tools.CustomTaskPane myTaskpane;

        private void ThisApplication_Startup(object sender, System.EventArgs e)
        {
            myControl = new UserControl1();
            myTaskpane = this.CustomTaskPanes.Add(myControl, "My Test");
            myTaskpane.Visible = false;
        }

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OpenXML における カスタムXML Part の活用

添付：sample.docx      サンプルの解説で使用している docx ファイル
添付：test1.xsn           item3.xml を作成した InfoPath のフォームテンプレート

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Word Content Control への カスタムXML Part の XML ノードのバインド追加

<w:dataBinding w:prefixMappings="xmlns:c='http://schemas.microsoft.com/office/infopath/2003/myXSD/2006-07-18T03:20:17'" w:xpath="/c:myFields/c:Name" w:storeItemID="{3CC358D1-412F-459D-86EE-17DDD81CFED8}"/>

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OpenXML へのプログラムからのアクセス

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.IO.Packaging;
using System.Xml;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string xmlNS = @"http://schemas.microsoft.com/office/infopath/2003/myXSD/2006-07-18T03:20:17";
            string xmlDocRelType = @"http://schemas.openxmlformats.org/officeDocument/2006/relationships/customXml";
            string officeDocRelType = @"http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument";

            PackagePart documentPart = null;
            PackagePart customxmlPart = null;
            Uri documentUri = null;
            Uri customxmlUri = null;

            // Prompt user
            Console.WriteLine("Please input your name.");
            string paramName = Console.ReadLine();
            Console.WriteLine("Please input your birth (yyyy-mm-dd).");
            string paramBirth = Console.ReadLine();

            // Open the docx container as a System.IO.Packaging.Package.
            using (Package docPackage = Package.Open(@"D:\work\sample_test.docx", FileMode.Open, FileAccess.ReadWrite))
            {
                // find the "documentRoot" part
                foreach (PackageRelationship relationship in docPackage.GetRelationshipsByType(officeDocRelType))
                {
                    documentUri = PackUriHelper.ResolvePartUri(new Uri("/", UriKind.Relative), relationship.TargetUri);
                    documentPart = docPackage.GetPart(documentUri);
                    break;  // document root part will be one, so exit soon !
                }

                //find the "customXML" part
                foreach (PackageRelationship relationship in documentPart.GetRelationshipsByType(xmlDocRelType))
                {
                    customxmlUri = PackUriHelper.ResolvePartUri(new Uri("/", UriKind.Relative), relationship.TargetUri);
                    if (CheckNamespace(docPackage.GetPart(customxmlUri), xmlNS) == true)
                    {
                        customxmlPart = docPackage.GetPart(customxmlUri);
                        break;
                    }
                }

                // Change values !
                XmlDocument customxmlXml = new XmlDocument();
                customxmlXml.Load(customxmlPart.GetStream());
                XmlNamespaceManager customxmlXmlNSMgr = new XmlNamespaceManager(customxmlXml.NameTable);
                customxmlXmlNSMgr.AddNamespace("my", xmlNS);
                XmlNode nodeName = customxmlXml.SelectSingleNode("/my:myFields/my:Name", customxmlXmlNSMgr);
                nodeName.InnerText = paramName;
                XmlNode nodeBirth = customxmlXml.SelectSingleNode("/my:myFields/my:Birth", customxmlXmlNSMgr);
                nodeBirth.InnerText = paramBirth;

                // Save !
                customxmlXml.Save(customxmlPart.GetStream(FileMode.Create, FileAccess.Write));
            }
        }

        static bool CheckNamespace(PackagePart thisPart, string matchNameSpace)
        {
            Stream outputStream = thisPart.GetStream(FileMode.Open, FileAccess.ReadWrite);
            StreamReader readStream = new StreamReader(outputStream);
            XmlDocument thisDoc = new XmlDocument();
            thisDoc.LoadXml(readStream.ReadToEnd());

            if (thisDoc.DocumentElement.NamespaceURI == matchNameSpace)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

    }
}

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InfoPath VSTA を使った実装

Dim root, id As System.Xml.XPath.XPathNavigator
root = Me.MainDataSource.CreateNavigator()
id = root.SelectSingleNode("/my:myFields/my:field2", Me.NamespaceManager)
If id.Value.Equals("") Then
  id.SetValue(Guid.NewGuid().ToString())
End If

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以上です