//// This code is part of Document Solutions for Word demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System;using System.Collections.Generic;using GrapeCity.Documents.Word;using System.Globalization;
namespace DsWordWeb.Demos{    // This example demonstrates the available aggregate functions that can be used with the 'calc'    // report templates feature for data aggregation.    // Unlike other report templates constructs, aggregates do not cause repetition of content    // in the generated document. Instead, they aggregate data and insert the single resulting    // value into the document.    // Aggregate functions' arguments can be expressions involving data, other functions and constants.    public class DataTplAggregates    {        public GcWordDocument CreateDocx()        {            // Generate a simple data source with random numeric data:            var values = new List<decimal>();            var rnd = Util.NewRandom();            var count = rnd.Next(10, 20);            for (int i = 0; i < count; ++i)                values.Add(new decimal(Math.Round((double)rnd.Next(0, 1000000) / rnd.Next(1, 100), 2)));
            var doc = new GcWordDocument();            doc.Body.Sections.First.PageSetup.Margin.Top = 36;            doc.Body.Sections.First.PageSetup.Margin.Bottom = 36;            doc.Body.Sections.First.PageSetup.Margin.Left = 36;            doc.Body.Sections.First.PageSetup.Margin.Right = 36;
            // Add the data source:            doc.DataTemplate.DataSources.Add("ds", values);
            // Styles and templates to show results:            var numberedListTemplate = doc.ListTemplates.Add(BuiltInListTemplateId.NumberDefault, "numberedListTemplate");            var bulletListTemplate = doc.ListTemplates.Add(BuiltInListTemplateId.BulletDefault, "bulletListTemplate");            var exStyle = doc.Styles[BuiltInStyleId.Heading3];            var resStyle = doc.Styles[BuiltInStyleId.Strong];
            // Print data to be summarized:            var paras = doc.Body.Paragraphs;            paras.Add("Data values to aggregate:", doc.Styles[BuiltInStyleId.Heading2]);            var p = paras.Add("{{#ds}}{{ds.value}}{{/ds}}", doc.Styles[BuiltInStyleId.ListParagraph]);            p.ListFormat.Template = numberedListTemplate;
            // Print the results:            paras.Add("Simple aggregates:", doc.Styles[BuiltInStyleId.Heading2]);            add("{{ calc Average(ds.value) }}");            add("{{ calc Count(ds.value) }}");            add("{{ calc First(ds.value) }}");            add("{{ calc Last(ds.value) }}");            add("{{ calc Max(ds.value) }}");            add("{{ calc Min(ds.value) }}");            add("{{ calc Sum(ds.value) }}");
            paras.Add("Aggregates on expressions:", doc.Styles[BuiltInStyleId.Heading2]);            add("{{ calc Sum(ds.value / Count(ds.value)) }}");            add("{{ calc Average(Pow(ds.value, 2)) }}");            add("{{ calc Average(Sqrt(ds.value)) }}");            add("{{ calc Sum(Iif(ds.value > 50, ds.value, 0)) }}");
            // Process the templates:            doc.DataTemplate.Process(CultureInfo.GetCultureInfo("en-US"));
            // Add a short note describing the demo at the top of the document:            paras.Insert(                "This example demonstrates the available aggregate functions that can be used with the 'calc' " +                "report templates feature for data aggregation. " +                "Unlike other report templates constructs, aggregates do not cause repetition of content " +                "in the generated document. Instead, they aggregate data and insert the (single) resulting " +                "value into the document. " +                "For example, to insert the sum of a field's values in all records of a data source, " +                "the template '{{calc Sum(ds.value)}}' can be used. " +                "Aggregate functions' arguments can be expressions involving data, other functions and constants. " +                "The data source used in this demo is a list of random decimal values. " +                "Please see this example's source code for full details.",                InsertLocation.Start);            paras.Insert("Report templates: calc aggregate functions", doc.Styles[BuiltInStyleId.Heading1], InsertLocation.Start);
            // Done:            return doc;
            void add(string expr)            {                // \x200B is a zero-width space used to prevent template expansion:                paras.Add(expr.Insert(1, "​​​\x200B") + " :  ", exStyle).ListFormat.Template = bulletListTemplate;                paras.Last.GetRange().Runs.Add(expr, resStyle);            }        }    }}