How to change font color or other attribute in IFieldMergingCallback

Aspose.Words Product Family
1

I was unsuccessful in changing color of data field during the callback for mail merge region.
How should I initialize the document builder to point at the correct field cell currently being processed in order to set font attributes?
Please review code below. I was assuming that the document builder position is already at the merged field. Thanks.

private void HandleGroupElements()
{
    _reportDocument.MailMerge.FieldMergingCallback = new HandleGroupElement(_reportDocument);
    dataTable.TableName = element.DataElementName;
    _reportDocument.MailMerge.ExecuteWithRegions(dataTable);
}

private class HandleGroupElement: IFieldMergingCallback
{
    void IFieldMergingCallback.FieldMerging(FieldMergingArgs e)
    {
        _mBuilder.Font.Color = Color.Red;
        _mBuilder.Font.Bold = true;
        _mBuilder.Font.Italic = false;
        _mBuilder.Font.Underline = Underline.Single;
    }
    void IFieldMergingCallback.ImageFieldMerging(ImageFieldMergingArgs e)
    {}
    internal HandleGroupElement(Document doc)
    {
        _mBuilder = new DocumentBuilder(doc);
    }
    private readonly DocumentBuilder _mBuilder;
}
2

Hi
Thanks for your request. To achieve this you should insert the value of the merge field yourself. For instance, see the following code:

[Test]
public void Test001()
{
    Document doc = new Document(@"Test001\in.doc");
    doc.MailMerge.FieldMergingCallback = new HandleGroupElement(doc);
    doc.MailMerge.Execute(new string[]
    {
        "test"
    }, new object[]
    {
        "this is value of mergefield"
    });
    doc.Save(@"Test001\out.doc");
}

private class HandleGroupElement: IFieldMergingCallback
{
    void IFieldMergingCallback.FieldMerging(FieldMergingArgs e)
    {
        // Move DocumentBuilder cursor to the field.
        _mBuilder.MoveToField(e.Field, false);
        // Change font settings.
        _mBuilder.Font.Color = Color.Red;
        _mBuilder.Font.Bold = true;
        _mBuilder.Font.Italic = false;
        _mBuilder.Font.Underline = Underline.Single;
        // Insert value of the mergefield using DocumentBuilder.
        _mBuilder.Write(e.FieldValue.ToString());
        // Set text of the field to the empty string.
        e.Text = "";
    }
    void IFieldMergingCallback.ImageFieldMerging(ImageFieldMergingArgs e)
    {}
    internal HandleGroupElement(Document doc)
    {
        _mBuilder = new DocumentBuilder(doc);
    }
    private readonly DocumentBuilder _mBuilder;
}

Hope this helps.
Best regards,