Statistical query group and sort

View inWPFUWPFormsiOSAndroid
View on GitHub

Query a feature table for statistics, grouping and sorting by different fields.

Image of statistical query group and sort

Use case

You can use statistical queries, grouping and sorting to process large amounts of data saved in feature tables. This is helpful for identifying trends and relationships within the data, which can be used to support further interpretations and decisions. For example, a health agency can use information on medical conditions occurring throughout a country to identify at-risk areas or demographics, and decide on further action and preventive measures.

How to use the sample

The sample will start with some default options selected. You can immediately click the "Get Statistics" button to see the results for these options. There are several ways to customize your queries:

  • You can add statistic definitions to the top-left table using the combo boxes and "Add" button. Select a table row and click "Remove" to remove a definition.
  • To change the Group-by fields, check the box by the field you want to group by in the bottom-left list view.
  • To change the Order-by fields, select a Group-by field (it must be checked) and click the ">>" button to add it to the Order-by table. To remove a field from the Order-by table, select it and click the "<<" button. To change the sort order of the Order-by field, the cells of the "Sort Order" column are combo-boxes that may be either ASCENDING or DESCENDING.

How it works

  1. Create a ServiceFeatureTable using the URL of a feature service and load the table.
  2. Get the feature tables field names list with featureTable.Fields.
  3. Create StatisticDefinitions specifying the field to compute statistics on and the StatisticType to compute.
  4. Create StatisticsQueryParameters passing in the list of statistic definitions.
  5. To have the results grouped by fields, add the field names to the query parameters' GroupByFieldNames collection.
  6. To have the results ordered by fields, create OrderBys, specifying the field name and SortOrder. Pass these OrderBys to the parameters' OrderByFields collection.
  7. To execute the query, call featureTable.QueryStatisticsAsync(queryParameters).
  8. Get the StatisticQueryResult. From this, you can get an iterator of StatisticRecords to loop through and display.

Relevant API

  • Field
  • OrderBy
  • QueryParameters
  • ServiceFeatureTable
  • StatisticDefinition
  • StatisticRecord
  • StatisticsQueryParameters
  • StatisticsQueryResult
  • StatisticType

About the data

This sample uses a Diabetes, Obesity, and Inactivity by US County feature layer hosted on ArcGIS Online.

Tags

correlation, data, fields, filter, group, sort, statistics, table

Sample Code

StatsQueryGroupAndSort.xamlStatsQueryGroupAndSort.xaml.cs
                                                                                                                                                                                                                                                                                                                      
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
<UserControl
    x:Class="ArcGISRuntime.UWP.Samples.StatsQueryGroupAndSort.StatsQueryGroupAndSort"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:ArcGISRuntime.UWP.Samples.StatsQueryGroupAndSort">

    <UserControl.Resources>
        <CollectionViewSource
            x:Name="GroupedResultData"
            IsSourceGrouped="True"
            Source="{Binding GroupedStatistics}" />
        <local:StringFormatConverter x:Key="StringFormatter" />
    </UserControl.Resources>

    <Grid
        MinWidth="300"
        MinHeight="300"
        MaxWidth="800"
        MaxHeight="800"
        HorizontalAlignment="Center"
        VerticalAlignment="Center">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="50" />
            <ColumnDefinition Width="110" />
            <ColumnDefinition Width="40" />
            <ColumnDefinition Width="110" />
            <ColumnDefinition Width="50" />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="40" />
            <RowDefinition Height="40" />
            <RowDefinition Height="*" MinHeight="50" />
            <RowDefinition Height="40" />
            <RowDefinition Height="40" />
            <RowDefinition Height="*" MinHeight="50" />
            <RowDefinition Height="30" />
            <RowDefinition Height="*" MinHeight="50" />
            <RowDefinition Height="30" />
            <RowDefinition Height="50" MinHeight="50" />
            <RowDefinition />
        </Grid.RowDefinitions>
        <Border
            Grid.Row="0"
            Grid.RowSpan="4"
            Grid.Column="0"
            Grid.ColumnSpan="5"
            BorderBrush="Black"
            BorderThickness="2" />
        <TextBlock
            Grid.Row="0"
            Grid.Column="1"
            Grid.ColumnSpan="3"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Text="Statistics: US States" />
        <TextBlock
            Grid.Row="1"
            HorizontalAlignment="Right"
            VerticalAlignment="Center"
            Text="Field:" />
        <ComboBox
            x:Name="FieldsComboBox"
            Grid.Row="1"
            Grid.Column="1"
            Margin="5"
            HorizontalAlignment="Stretch"
            VerticalAlignment="Center">
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Name}" />
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>
        <TextBlock
            Grid.Row="1"
            Grid.Column="2"
            HorizontalAlignment="Right"
            VerticalAlignment="Center"
            Text="Type:" />
        <ComboBox
            x:Name="StatTypeComboBox"
            Grid.Row="1"
            Grid.Column="3"
            Margin="5"
            HorizontalAlignment="Stretch"
            VerticalAlignment="Center" />
        <Button
            x:Name="AddStatisticButton"
            Grid.Row="1"
            Grid.Column="4"
            Margin="3"
            Click="AddStatisticClicked"
            Content="+" />
        <ScrollViewer
            Grid.Row="2"
            Grid.ColumnSpan="5"
            Margin="25,5">
            <ListBox x:Name="StatFieldsListBox" Height="120">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <TextBlock>
                            <Run Text="{Binding OnFieldName}" />
                            <Run Text=" (" />
                            <Run Text="{Binding StatisticType}" />
                            <Run Text=")" />
                        </TextBlock>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
        </ScrollViewer>
        <Button
            x:Name="RemoveStatField"
            Grid.Row="3"
            Grid.Column="3"
            Height="30"
            HorizontalAlignment="Stretch"
            VerticalAlignment="Top"
            Click="RemoveStatisticClicked"
            Content="Remove" />
        <TextBlock
            Grid.Row="4"
            Grid.ColumnSpan="2"
            Margin="25,0,0,5"
            HorizontalAlignment="Left"
            VerticalAlignment="Bottom"
            Text="Group by" />
        <ListBox
            x:Name="GroupFieldsListBox"
            Grid.Row="5"
            Grid.ColumnSpan="5"
            MinHeight="110"
            Margin="25,0"
            HorizontalAlignment="Stretch"
            VerticalAlignment="Stretch">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <CheckBox
                            Checked="GroupFieldCheckChanged"
                            Content="{Binding Name}"
                            Unchecked="GroupFieldCheckChanged" />
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
        <TextBlock
            Grid.Row="6"
            Grid.ColumnSpan="2"
            Margin="25,0,0,5"
            HorizontalAlignment="Left"
            VerticalAlignment="Bottom"
            Text="Order by" />
        <ListBox
            x:Name="OrderByFieldsListBox"
            Grid.Row="7"
            Grid.ColumnSpan="5"
            MinHeight="110"
            Margin="25,0"
            HorizontalAlignment="Stretch"
            VerticalAlignment="Stretch">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <CheckBox IsChecked="{Binding OrderWith}">
                            <CheckBox.Content>
                                <TextBlock>
                                    <Run Text="{Binding OrderInfo.FieldName}" />
                                    <Run Text=" (" />
                                    <Run Text="{Binding OrderInfo.SortOrder}" />
                                    <Run Text=")" />
                                </TextBlock>
                            </CheckBox.Content>
                        </CheckBox>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
        <Button
            x:Name="SortOrderButton"
            Grid.Row="8"
            Grid.Column="3"
            Grid.ColumnSpan="2"
            Margin="0,5,25,0"
            Padding="5,0"
            HorizontalAlignment="Center"
            VerticalAlignment="Top"
            Click="ChangeFieldSortOrder"
            Content="Change sort order" />
        <Button
            x:Name="GetStatisticsButton"
            Grid.Row="9"
            Grid.Column="0"
            Grid.ColumnSpan="5"
            Height="40"
            Margin="25,5,30,5"
            Padding="10,0"
            HorizontalAlignment="Stretch"
            VerticalAlignment="Stretch"
            Click="OnExecuteStatisticsQueryClicked"
            Content="Get Statistics" />

        <Grid
            x:Name="SmallResultsPanel"
            Grid.Row="10"
            Grid.ColumnSpan="5"
            Margin="25,0">
            <ListView ItemsSource="{Binding Source={StaticResource GroupedResultData}}">
                <ListView.GroupStyle>
                    <GroupStyle>
                        <GroupStyle.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Key}" />
                            </DataTemplate>
                        </GroupStyle.HeaderTemplate>
                    </GroupStyle>
                </ListView.GroupStyle>

                <ListView.ItemTemplate>
                    <DataTemplate>
                        <ItemsControl ItemsSource="{Binding}">
                            <ItemsControl.ItemTemplate>
                                <DataTemplate>
                                    <TextBlock HorizontalAlignment="Left">
                                        <Run FontWeight="Bold" Text="{Binding Key}" />
                                        <Run Text=" : " />
                                        <Run Text="{Binding Value, Converter={StaticResource StringFormatter}, ConverterParameter='{}{0:0,0}'}" />
                                    </TextBlock>
                                </DataTemplate>
                            </ItemsControl.ItemTemplate>
                        </ItemsControl>
                    </DataTemplate>
                </ListView.ItemTemplate>
            </ListView>
        </Grid>

        <Grid
            x:Name="LargeResultsPanel"
            Grid.Row="0"
            Grid.RowSpan="10"
            Grid.Column="5"
            Margin="15,0">
            <ListView Width="300" ItemsSource="{Binding Source={StaticResource GroupedResultData}}">
                <ListView.GroupStyle>
                    <GroupStyle>
                        <GroupStyle.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Key}" />
                            </DataTemplate>
                        </GroupStyle.HeaderTemplate>
                    </GroupStyle>
                </ListView.GroupStyle>

                <ListView.ItemTemplate>
                    <DataTemplate>
                        <ItemsControl ItemsSource="{Binding}">
                            <ItemsControl.ItemTemplate>
                                <DataTemplate>
                                    <TextBlock HorizontalAlignment="Left">
                                        <Run FontWeight="Bold" Text="{Binding Key}" />
                                        <Run Text=" : " />
                                        <Run Text="{Binding Value, Converter={StaticResource StringFormatter}, ConverterParameter='{}{0:0,0}'}" />
                                    </TextBlock>
                                </DataTemplate>
                            </ItemsControl.ItemTemplate>
                        </ItemsControl>
                    </DataTemplate>
                </ListView.ItemTemplate>
            </ListView>
        </Grid>

        <!--
            ============================
            Adaptive triggers
            ============================
        -->
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup>
                <!--
                    ============================
                    Handle screen less than 720 effective pixels
                    ============================
                -->
                <VisualState>
                    <VisualState.StateTriggers>
                        <AdaptiveTrigger MinWindowWidth="0" />
                    </VisualState.StateTriggers>
                    <VisualState.Setters>
                        <Setter Target="SmallResultsPanel.Visibility" Value="Visible" />
                        <Setter Target="LargeResultsPanel.Visibility" Value="Collapsed" />
                    </VisualState.Setters>
                </VisualState>
                <!--
                    ============================
                    Handle screen over 720 effective pixels
                    ============================
                -->
                <VisualState>
                    <VisualState.StateTriggers>
                        <AdaptiveTrigger MinWindowWidth="720" />
                    </VisualState.StateTriggers>
                    <VisualState.Setters>
                        <Setter Target="SmallResultsPanel.Visibility" Value="Collapsed" />
                        <Setter Target="LargeResultsPanel.Visibility" Value="Visible" />
                    </VisualState.Setters>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
    </Grid>
</UserControl>

Your browser is no longer supported. Please upgrade your browser for the best experience. See our browser deprecation post for more details.