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;
2,583,922
2,467,154
105%
618,005
615,745
100%
344,587
335,932
103%
238,244
139,056
171%
29,579
117,609
25%
76,764
79,267
97%
273,418
279,813
98%
137,763
75,584
182%
38,573
90,562
43%
97,082
113,667
85%
740,736
650,357
114%
323,152
289,602
112%
164,609
79,015
208%
23,631
80,161
29%
134,912
130,426
103%
417,584
360,755
116%
250,120
149,068
168%
26,611
79,881
33%
140,853
131,806
107%
545,781
605,003
90%
275,362
288,268
96%
158,926
82,695
192%
31,678
107,410
29%
84,758
98,163
86%
270,419
316,735
85%
113,105
83,197
136%
28,479
94,706
30%
128,835
138,832
93%
679,400
596,049
114%
351,750
289,139
122%
164,770
75,770
217%
31,671
89,979
35%
155,309
123,390
126%
327,650
306,910
107%
165,849
110,919
150%
24,409
69,057
35%
137,392
126,934
108%

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>
}