Features

Calculated Aggregates

Calculated Aggregates

The PivotEngine support GetAggregateValue function in PivotField to calculate aggregate field for each summary row.

Features

Overview
Slicer
Remote Bind
DataEngine Service(DataEngine)
DataEngine Service(DataSource)
DataEngine Service(SSAS)
SSAS (OLAP Cube)
Calculated Aggregates
header
header
header
header
Product
Date
Range
header
Sales (Sum)
Downloads (Sum)
Conversion (Sum)
Sales:0;
Downloads:0;
Conversion:0;
2,484,772
2,524,935
98%
555,539
564,595
98%
268,451
269,628
100%
126,481
61,979
204%
18,328
53,676
34%
123,642
153,973
80%
287,088
294,967
97%
167,841
89,037
189%
34,944
123,044
28%
84,303
82,886
102%
488,778
517,104
95%
264,620
276,544
96%
116,248
65,925
176%
31,480
95,707
33%
116,892
114,912
102%
224,158
240,560
93%
109,533
50,060
219%
12,139
54,865
22%
102,486
135,635
76%
787,116
789,105
100%
415,868
377,618
110%
249,379
154,763
161%
21,073
57,264
37%
145,416
165,591
88%
371,248
411,487
90%
198,899
96,541
206%
41,489
163,154
25%
130,860
151,792
86%
653,339
654,131
100%
311,417
332,617
94%
149,206
93,949
159%
37,867
111,096
34%
124,344
127,572
97%
341,922
321,514
106%
184,708
119,040
155%
24,730
95,560
26%
132,484
106,914
124%

Description

PivotField objects have two properties as function that support custom calculations:
  • The GetValue function takes a data item as a parameter and returns a value that is calculated based on other properties of the data item. The function has no access to any aggregate information.
  • The GetAggregateValue function takes a summary row as a parameter and returns a value to be displayed as an aggregate for the field. The function has no access to the individual/raw data items.
This sample uses the GetValue function to calculate a Range field that categorizes raw sales value into three levels: "High", "Medium", or "Low".
And uses GetAggregateValue function to calculate a Conversion field that shows the Sales/Downloads ratio for each summary row.
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using OlapExplorer.Models;
using System.Collections;
using Microsoft.AspNetCore.Mvc;
using System.Linq;
using System.Collections.Generic;
using C1.Web.Mvc.Olap;
  
namespace OlapExplorer.Controllers.Olap
{
    public partial class OlapController : Controller
    {
        // GET: PivotGrid
        public ActionResult CalculatedAggregates()
        {
            return View(ProductData.GetData(500));
        }
    }
}
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@using C1.Web.Mvc.Grid
@model IEnumerable<ProductData>
  
<c1-pivot-engine id="pvEngine" show-row-totals="Subtotals" show-column-totals="Subtotals" totals-before-data="true">
    <c1-items-source source-collection="Model"></c1-items-source>
    <c1-pivot-field-collection>
        <c1-pivot-field header="Country" binding="Country"></c1-pivot-field>
        <c1-pivot-field header="Product" binding="Product"></c1-pivot-field>
    <c1-pivot-field header="Date" binding="Date" format=@("yyyy \"Q\"q")></c1-pivot-field>
        <c1-pivot-field header="Range" type="DataType.String" aggregate="Cnt" get-value="getValue"></c1-pivot-field>
        <c1-pivot-field header="Sales" binding="Sales" format="n0"></c1-pivot-field>
        <c1-pivot-field header="Downloads" binding="Downloads" format="n0"></c1-pivot-field>
    <c1-pivot-field header="Conversion" type="DataType.Number" get-aggregate-value="getAggregateValue" format="p0"></c1-pivot-field>
    </c1-pivot-field-collection>
    <c1-view-field-collection c1-property="RowFields" items="Product,Date,Range"></c1-view-field-collection>
    <c1-view-field-collection c1-property="ValueFields" items="Sales,Downloads,Conversion"></c1-view-field-collection>
</c1-pivot-engine>
  
<div class="row">
    <div class="col-sm-4 col-md-4">
        <c1-pivot-panel id="pvPanel" items-source-id="pvEngine"></c1-pivot-panel>
    </div>
    <div class="col-sm-8 col-md-8">
        <c1-pivot-grid id="pvGrid" items-source-id="pvEngine" outline-mode="false" show-value-field-headers="false"></c1-pivot-grid>
    </div>
</div>
  
@section Scripts{
    <script type="text/javascript">
        function getValue(item) {
            let sales = item.Sales;
            return sales <= 3000 ? 'Low' : sales <= 7000 ? 'Medium' : 'High';
        }
  
        function getAggregateValue(row) {
            return row.Downloads ? row.Sales / row.Downloads : 0;
        }
    </script>
}
  
@section Settings{
}
  
@section Description{
  
        @Html.Raw(OlapRes.CalculatedAggregates_Text1)
  <ul>
    <li>@Html.Raw(OlapRes.CalculatedAggregates_Text2)</li>
    <li>@Html.Raw(OlapRes.CalculatedAggregates_Text3)</li>
  </ul>
    @Html.Raw(OlapRes.CalculatedAggregates_Text4)
  <br />
    @Html.Raw(OlapRes.CalculatedAggregates_Text5)
  
}
  
@section Summary{
    <p>@Html.Raw(OlapRes.CalculatedAggregates_Text0)</p>
}