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GroupDocs.Comparison allows you to apply or discard specific changes between source and target documents and save output document with (or without) selected changes.
To apply/reject changes to output document, follow these steps:
- Instantiate the Comparer object. Specify the source document path or stream.
- Call the Add method. Specify the target document path or stream.
- Call the Compare method.
- Call the GetChanges method to get changes list.
- Set the ComparisonAction of the appropriate change object to the ComparisonAction.Accept or ComparisonAction.Reject value.
- Call the ApplyChanges method. Specify the collection of changes.
ApplyChangeOptions class includes the following properties:
- Changes is a list of changes that must be applied (or not) to the output document
- SaveOriginalState is an option to reep the original state of the compared result after applying changes
The following code snippets show how to accept/reject changes:
using (Comparer comparer = new Comparer("source.docx"))
{
comparer.Add("target.docx");
comparer.Compare();
ChangeInfo[] changes = comparer.GetChanges();
changes[0].ComparisonAction = ComparisonAction.Reject;
comparer.ApplyChanges(File.Create("result.docx"), new SaveOptions(), new ApplyChangeOptions() { Changes = changes });
}
The result is as follows:
| Accepted changes | Rejected changes |
|---|---|
 |  |
using (Comparer comparer = new Comparer(File.OpenRead("source.docx")))
{
comparer.Add(File.OpenRead("target.docx"));
comparer.Compare(new SaveOptions(), new CompareOptions());
ChangeInfo[] changes = comparer.GetChanges(new GetChangeOptions());
changes[0].ComparisonAction = ComparisonAction.Reject;
comparer.ApplyChanges(File.Create("result.docx"), new SaveOptions(), new ApplyChangeOptions() { Changes = changes });
}
using (Comparer comparer = new Comparer("source.docx"))
{
comparer.Add("target.docx");
comparer.Compare();
ChangeInfo[] changes = comparer.GetChanges();
changes[0].ComparisonAction = ComparisonAction.Reject;
comparer.ApplyChanges("resultWithRejectedChange.docx", new ApplyChangeOptions() { Changes = changes, SaveOriginalState = true });
changes = comparer.GetChanges();
changes[0].ComparisonAction = ComparisonAction.Accept;
comparer.ApplyChanges("resultWithAcceptedChange.docx", new ApplyChangeOptions() { Changes = changes });
}
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