Existing Scenario: In one of my application feature I am accepting files as input and concatenating all files in one document , the files may contain some anchor strings like {{Signature}},{{FullName}} which i am using for placing signature controls of Docusign. Since i don’t want to display the string in final document I am using below logic to color the string with background colors .
======Implementation for IreplacingCallBack class =============
public class ReplaceEvaluatorFindAndHighlight : IReplacingCallback
{
///
/// This method is called by the Aspose.Words find and replace engine for each match.
/// This method highlights the match string, even if it spans multiple runs.
///
///
public string StrColor { get; set; }
public ReplaceEvaluatorFindAndHighlight(string strColor)
{
StrColor = strColor;
}
public ReplaceAction 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 highlighting.
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))
{
runs.Add(currentNode);
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);
runs.Add(currentNode);
}
// Now highlight all runs in the sequence.
foreach (Run run in runs)
{
run.Font.Color = System.Drawing.ColorTranslator.FromHtml(StrColor);
}
// Signal to the replace engine to do nothing because we have already done all what we wanted.
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, position);
run.ParentNode.InsertAfter(afterRun, run);
return afterRun;
}
}
===============Call in Document for color replacement =============
Regex regex = new Regex("{{Signature}}", RegexOptions.IgnoreCase);
objCollatedDoc.Range.Replace(regex, new ReplaceEvaluatorFindAndHighlight(strColor), false);
================================Status of above code =======================
The code is working perfectly file for maximum documents but there is specific document attached and used in same sequence for concatenation the replace logic is not working .
Even when i tried single file from the attachment or collated Language1.docx before Downloads.doc the replace logic is working fine .
Can somebody help me with the root cause why such issue i am facing and solution for same .