# Replace field/placeholder in doc with an additional doc

#1

Hi,

We want to create a complex Document based on several smal Word documents. So i think we need placeholder who are replaced the placeholder (or a field) by a complete word.docx.

How can we do that?
Would you have code examples for a similar scenario?

Regards
Harald

#2

You can simply insert mergefields in your main document. After that you can move cursor to those mergefields and insert small-documents. You can build logic on the following code to get the desired results:

Aspose.Words.Document doc = new Aspose.Words.Document("E:\\temp\\template.docx");
DocumentBuilder builder = new DocumentBuilder(doc);

Aspose.Words.Document subDoc = new Aspose.Words.Document("E:\\temp\\in.docx");

builder.MoveToMergeField("mf");
builder.InsertDocument(subDoc, ImportFormatMode.KeepSourceFormatting);

doc.Save("E:\\Temp\\19.9.docx");


Hope, this helps.

#3

Hello,

manny thank you! That’s easy and easy.

Another question. How can I proceed if the newly added document is to be replaced by a field (ie MergeField) or another placeholder (what is the best case?). The replacement with a string is clear, but not by a document.

Harald

#4

You can also build logic on the following code to get the desired output:

Document doc = new Document("E:\\Temp\\template.docx");
Document subDoc = new Document("E:\\Temp\\in.docx");

FindReplaceOptions options = new FindReplaceOptions();
options.ReplacingCallback = new FindAndReplace(subDoc);

doc.Range.Replace(new Regex("PLACEHOLDER"), "", options);

doc.Save(@"E:\Temp\19.9.docx");


private class FindAndReplace : IReplacingCallback
{
public Document doc = null;
public FindAndReplace(Document _doc)
{
doc = _doc;
}

ReplaceAction IReplacingCallback.Replacing(ReplacingArgs e)
{
// This is a Run node that contains either the beginning or the complete match.
Node currentNode = e.MatchNode;

// The first (and may be the only) run can contain text before the match,
// in this case it is necessary to split the run.
if (e.MatchOffset > 0)
currentNode = SplitRun((Run)currentNode, e.MatchOffset);

// This array is used to store all nodes of the match for further removing.
ArrayList runs = new ArrayList();

// Find all runs that contain parts of the match string.
int remainingLength = e.Match.Value.Length;
while (
(remainingLength > 0) &&
(currentNode != null) &&
(currentNode.GetText().Length <= remainingLength))
{
remainingLength = remainingLength - currentNode.GetText().Length;

// Select the next Run node.
// Have to loop because there could be other nodes such as BookmarkStart etc.
do
{
currentNode = currentNode.NextSibling;
}
while ((currentNode != null) && (currentNode.NodeType != NodeType.Run));
}

// Split the last run that contains the match if there is any text left.
if ((currentNode != null) && (remainingLength > 0))
{
SplitRun((Run)currentNode, remainingLength);
}

DocumentBuilder builder = new DocumentBuilder((Document)e.MatchNode.Document);
builder.MoveTo((Run)runs[0]);

builder.InsertDocument(doc, ImportFormatMode.KeepSourceFormatting);

foreach (Run run in runs)
run.Remove();

return ReplaceAction.Skip;
}

private static Run SplitRun(Run run, int position)
{
Run afterRun = (Run)run.Clone(true);
afterRun.Text = run.Text.Substring(position);
run.Text = run.Text.Substring((0), (0) + (position));
run.ParentNode.InsertAfter(afterRun, run);
return afterRun;
}
}