Remove Custom XML Part Data Binding or Mapping & Update Content Control in Word DOCX Document (C# .NET)

Aspose.Words Product Family
1

I am trying to change the contents of one of the content controls inside Word file.
It works or not depending if the content control already had a value before.
If it is empty the new value is used, if it is not empty, the change is ignored.

I have also attached the sample project.

using Aspose.Words;
using Aspose.Words.Markup;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AsposeReMergeTest
{
    class Program
    {
        const string ReMergeField1 = "(Document) Title";
        //const string ReMergeField1 = "(Document) Reply deadl.";
        const string ReMergeField1Value = "New Document Title";

        const string ReMergeField2 = "(Case) Planned close";
        const string ReMergeField2Value = "New Planned Close";

        static void Main(string[] args)
        {
            try
            {
                Dictionary<string, string> reMergeFieldsData = new Dictionary<string, string>
                {
                    { ReMergeField1, ReMergeField1Value },
                    { ReMergeField2, ReMergeField2Value }
                };

                //var document = new Document("TestAnnTemplate.dotm"); // works fine
                var document = new Document("TestAnnPartially.docx");  // broken

                document.UpdatePageLayout();

                var modified = false;
                foreach (var contentControl in document.GetChildNodes(NodeType.StructuredDocumentTag, true).OfType<StructuredDocumentTag>())
                {
                    if (string.IsNullOrWhiteSpace(contentControl.Title) ||
                        !reMergeFieldsData.TryGetValue(contentControl.Title, out var value))
                        continue;

                    var runs = contentControl.GetChildNodes(NodeType.Run, isDeep: true).OfType<Run>().Select((run, index) => (run, index));
                    foreach (var (run, index) in runs)
                    {
                        run.Text = index == 0 ? value : ""; // this line is hit and I can see that Text has changed
                    }

                    modified = true;
                }

                if (!modified)
                    return;

                document.UpdatePageLayout();

                var stream = new MemoryStream();
                document.Save(stream, SaveFormat.Docx);

                File.WriteAllBytes("output.docx", stream.ToArray());
            }
            catch (Exception exception)
            {
                Console.Error.WriteLine(exception);
            }
        }
    }
}

AsposeReMergeTest.zip (82.0 KB)

2

It looks like the problem is related to the fact that non-empty content controls are bound with XML mapping. Having it removed like below:

contentControl.XmlMapping.Delete();

makes the problem go away.

3

@WorkZone,

Yes, the problem occurs because the content control in question is mapped to a XML data. Please use the following code to workaround this problem:

using Aspose.Words;
using Aspose.Words.Markup;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace AsposeReMergeTest
{
    class Program
    {
        const string ReMergeField1 = "(Document) Title";
        //const string ReMergeField1 = "(Document) Reply deadl.";
        const string ReMergeField1Value = "New Document Title";

        const string ReMergeField2 = "(Case) Planned close";
        const string ReMergeField2Value = "New Planned Close";

        static void Main(string[] args)
        {
            try
            {
                Dictionary<string, string> reMergeFieldsData = new Dictionary<string, string>
                {
                    { ReMergeField1, ReMergeField1Value },
                    { ReMergeField2, ReMergeField2Value }
                };

                //var document = new Document("TestAnnTemplate.dotm"); // works fine
                var document = new Document("TestAnnPartially.docx");  // broken

                document.UpdatePageLayout();

                var modified = false;
                foreach (var contentControl in document.GetChildNodes(NodeType.StructuredDocumentTag, true).OfType<StructuredDocumentTag>())
                {
                    if (string.IsNullOrWhiteSpace(contentControl.Title) ||
                        !reMergeFieldsData.TryGetValue(contentControl.Title, out var value))
                        continue;

                    if (contentControl.XmlMapping.IsMapped)
                        contentControl.XmlMapping.Delete();

                    var runs = contentControl.GetChildNodes(NodeType.Run, isDeep: true).OfType<Run>().Select((run, index) => (run, index));
                    foreach (var (run, index) in runs)
                    {
                        run.Text = index == 0 ? value : ""; // this line is hit and I can see that Text has changed
                    }

                    modified = true;
                }
                if (!modified)
                    return;

                document.UpdatePageLayout();

                var stream = new MemoryStream();
                document.Save(stream, SaveFormat.Docx);

                File.WriteAllBytes("output.docx", stream.ToArray());
            }
            catch (Exception exception)
            {
                Console.Error.WriteLine(exception);
            }
        }
    }
}
4

Thanks for the help.