Features

Calculated Aggregates

Calculated Aggregates

The PivotEngine supports 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
Product
Date
Range
Sales (Sum)
Downloads (Sum)
Conversion
Sales:0;
Downloads:0;
Conversion:0;
2,548,883
2,490,706
102%
679,809
600,864
113%
369,555
319,189
116%
173,768
80,584
216%
24,672
68,848
36%
171,115
169,757
101%
310,254
281,675
110%
173,954
88,990
195%
26,592
99,842
27%
109,708
92,843
118%
585,155
604,532
97%
297,776
322,628
92%
182,864
124,364
147%
27,659
110,873
25%
87,253
87,391
100%
287,379
281,904
102%
132,160
77,159
171%
23,875
90,772
26%
131,344
113,973
115%
664,806
676,193
98%
322,541
326,251
99%
156,688
93,522
168%
27,415
89,041
31%
138,438
143,688
96%
342,265
349,942
98%
173,486
128,279
135%
28,035
79,749
35%
140,744
141,914
99%
619,113
609,117
102%
351,313
337,644
104%
170,393
95,021
179%
25,909
98,514
26%
155,011
144,109
108%
267,800
271,473
99%
127,128
69,885
182%
19,220
84,280
23%
121,452
117,308
104%

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>
}