CaseCodeStyle

public string CaseCodeStyle { get; set; }

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// Insert a MERGEBARCODE field, which will accept values from a data source during a mail merge.
// This field will convert all values in a merge data source's "MyITF14Barcode" column into ITF14 barcodes.
FieldMergeBarcode field = (FieldMergeBarcode)builder.InsertField(FieldType.FieldMergeBarcode, true);
field.BarcodeType = "ITF14";
field.BarcodeValue = "MyITF14Barcode";
field.CaseCodeStyle = "STD";

Assert.AreEqual(FieldType.FieldMergeBarcode, field.Type);
Assert.AreEqual(" MERGEBARCODE  MyITF14Barcode ITF14 \\c STD", field.GetFieldCode());

// Create a DataTable with a column with the same name as our MERGEBARCODE field's BarcodeValue.
// The mail merge will create a new page for each row. Each page will contain a DISPLAYBARCODE field,
// which will display an ITF14 barcode with the value from the merged row.
DataTable table = new DataTable("Barcodes");
table.Columns.Add("MyITF14Barcode");
table.Rows.Add(new[] { "09312345678907" });
table.Rows.Add(new[] { "1234567891234" });

doc.MailMerge.Execute(table);

Assert.AreEqual(FieldType.FieldDisplayBarcode, doc.Range.Fields[0].Type);
Assert.AreEqual("DISPLAYBARCODE \"09312345678907\" ITF14 \\c STD",
    doc.Range.Fields[0].GetFieldCode());
Assert.AreEqual(FieldType.FieldDisplayBarcode, doc.Range.Fields[1].Type);
Assert.AreEqual("DISPLAYBARCODE \"1234567891234\" ITF14 \\c STD",
    doc.Range.Fields[1].GetFieldCode());

doc.Save(ArtifactsDir + "Field.MERGEBARCODE.ITF14.docx");