DataTplRestartList.cs
//
// This code is part of GrapeCity Documents for Word samples.
// Copyright (c) GrapeCity, Inc. All rights reserved.
//
using System;
using System.IO;
using System.Drawing;
using System.Collections.Generic;
using System.Linq;
using GrapeCity.Documents.Word;

namespace GcWordWeb.Samples
{
    // This sample demonstrates the use of the restart list formatter
    // to print the list of oceans and each ocean's list of seas,
    // restarting the inner seas list for each ocean.
    // This sample is similar to DataTplNestedList but uses a JSON
    // data source, and restarts the nested list for each ocean.
    public class DataTplRestartList
    {
        public GcWordDocument CreateDocx()
        {
            var doc = new GcWordDocument();

            // Add JSON data source to the data template data sources:
            using (var oceans = File.OpenRead(Path.Combine("Resources", "data", "oceans.json")))
                doc.DataTemplate.DataSources.Add("ds", oceans);

            // Our document consists of a top list with ocean names,
            // and a nested list with each ocean's sea names.
            // The ':restart()' formatter associated with a range restarts
            // the nested lists on each iteration over the range,
            // but does not restart the outer list - which is what we
            // want in this and most other cases (to restart the topmost list too,
            // use the optional 'all' parameter ':restart(all)'):
            var pTop = doc.Body.Paragraphs.Add("{{#ds}:restart()}{{ds.name}} Ocean:", doc.Styles[BuiltInStyleId.ListNumber]);
            var pNested = doc.Body.Paragraphs.Add("{{#ds.seas}}{{ds.seas.name}}{{/ds.seas}}{{/ds}}", doc.Styles[BuiltInStyleId.ListNumber2]);

            // Add list templates and set up list formatting:
            var topListTemplate = doc.ListTemplates.Add(BuiltInListTemplateId.NumberDefault, "topListTemplate");
            var nestedListTemplate = doc.ListTemplates.Add(BuiltInListTemplateId.NumberDefault, "nestedListTemplate");
            pTop.ListFormat.Template = topListTemplate;
            pNested.ListFormat.Template = nestedListTemplate;
            pNested.ListFormat.LevelNumber = 1;

            // This call expands all data templates in the document,
            // replacing template tags with data (iterating over all data items):
            doc.DataTemplate.Process();

            // Done:
            return doc;
        }
    }
}