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;
2,529,668
2,473,494
102%
600,004
607,965
99%
346,666
295,075
117%
170,604
88,253
193%
20,616
56,442
37%
155,446
150,380
103%
253,338
312,890
81%
96,902
58,509
166%
39,356
118,161
33%
117,080
136,220
86%
635,032
683,834
93%
322,620
336,283
96%
178,847
92,897
193%
36,830
107,343
34%
106,943
136,043
79%
312,412
347,551
90%
163,487
97,535
168%
38,187
124,176
31%
110,738
125,840
88%
616,310
601,868
102%
244,349
236,976
103%
98,701
53,108
186%
18,724
53,808
35%
126,924
130,060
98%
371,961
364,892
102%
191,207
91,751
208%
30,434
116,653
26%
150,320
156,488
96%
678,322
579,827
117%
340,271
293,690
116%
204,028
107,710
189%
16,811
60,074
28%
119,432
125,906
95%
338,051
286,137
118%
185,947
99,918
186%
23,201
75,745
31%
128,903
110,474
117%

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>
}