The total summary, which is located in the grid footer, provides a synopsis of all data contained in the grid. It contains several summary items. Each item displays a value that is a product of applying an aggregate function to the data of a specific column.

To specify the items of the total summary, declare an array of objects, each of which contains at least two fields: column and summaryType. The column field specifies the identifier of the column that provides data for an aggregate function. The summaryType specifies the aggregate function to be applied. The following code snippet shows how to declare two summary items.

$(function () {
    $("#dataGridContainer").dxDataGrid({
        // ...
        summary: {
            totalItems: [{
                column: 'Age',
                summaryType: 'avg'
            }, {
                column: 'LastName',
                summaryType: 'count'
            }]
        }
    });
});

<dx-data-grid ... >
    <dxo-summary>
        <dxi-total-item
            column="Age"
            summaryType="avg">
        </dxi-total-item>
        <dxi-total-item
            column="LastName"
            summaryType="count">
        </dxi-total-item>
    </dxo-summary>
</dx-data-grid>

import { DxDataGridModule } from 'devextreme-angular';
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxDataGridModule
    ],
    // ...
})

By default, a summary item is placed in the column that provides data for it. If you need to place it in another column, assign the identifier of this column to the showInColumn option.

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See Also

• Total Summary

The default alignment of a summary item depends on the type of data that is held by the column that displays this item. The following table illustrates the dependency between the default alignment and the column data type.

When using the widget as an ASP.NET MVC Control, specify this option using the HorizontalAlignment enum. This enum accepts the following values: Left, Center and Right.

See Also

• Total Summary - Alignment and Location

To provide data for a summary item, assign the name, data field or caption of a column to this option. The summary item will be displayed in the corresponding column. If you require to place the summary item in another column, set the showInColumn option for this item.

See Also

• Total Summary

You can change the appearance of summary items using CSS styles. To apply a style to a summary item, implement a CSS class, which may contain various properties, and assign the name of this class to the cssClass option of the summary item.

This option accepts a function that must return the text to be displayed in the summary item. When you implement this function, you can access the summary item value using the fields of object passed to the function as its argument.

See Also

• Format Text and Value

When implementing the pattern, you can access the summary item value with applied format using position marker 0. If the summary item is placed in any other column rather than its parent one, you can also access the caption of the parent column using position marker 1. Place each of these position markers within curly brackets.

If your scenario requires more complex text customizations, utilize the customizeText option.

See Also

• Format Text and Value

Specify this option if you need to refer to a summary item in your code afterwards, e.g., inside the calculateCustomSummary function.

By default, a summary item is placed in the column that provides data for it. If you require to place it in another column, assign the name, data field or caption of this column to the showInColumn option.

See Also

• Total Summary - Alignment and Location

Specified in a summary configuration object, this option affects an individual summary item. If you need to apply a single setting to all summaries in a grid, specify the skipEmptyValues option in the summary object.

$(function () {
    $("#dataGridContainer").dxDataGrid({
        // ...
        summary: {
            // ...
            skipEmptyValues: false
        }
    });
});

<dx-data-grid ... >
    <dxo-summary [skipEmptyValues]="false"></dxo-summary>
</dx-data-grid>

import { DxDataGridModule } from 'devextreme-angular';
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxDataGridModule
    ],
    // ...
})

$(function () {
    $("#dataGridContainer").dxDataGrid({
        // ...
        summary: {
            totalItems: [{
                summaryType: "custom",
                name: "customSummary1"
            }],
            calculateCustomSummary: function (options) {
                if (options.name == 'customSummary1') {
                    if (options.summaryProcess == 'start') {
                        options.totalValue = 0;
                    }
                    if (options.summaryProcess == 'calculate') {
                        if (e.value) {
                            options.totalValue++;
                        }
                    }
                }
            }
        }
    });
});

<dx-data-grid ... >
    <dxo-summary [calculateCustomSummary]="calculateSummary">
        <dxi-total-item
            summaryType="custom"
            name="customSummary1">
        </dxi-total-item>
    </dxo-summary>
</dx-data-grid>

import { DxDataGridModule } from 'devextreme-angular';
// ...
export class AppComponent {
    calculateSummary (options) {
        if (options.name == 'customSummary1') {
            if (options.summaryProcess == 'start') {
                options.totalValue = 0;
            }
            if (options.summaryProcess == 'calculate') {
                if (e.value) {
                    options.totalValue++;
                }
            }
        }
    };
}
@NgModule({
    imports: [
        // ...
        DxDataGridModule
    ],
    // ...
})

A summary item displays a value that is a product of applying an aggregate function to the data of a specific column. This aggregate function is defined by the summary type. The following list gives an overview of available summary types.

• "sum"
  Sums up all values in a column.
• "min"
  Calculates the minimum value in a column.
• "max"
  Calculates the maximum value in a column.
• "avg"
  Calculates the average of all values in a column.
• "count"
  Calculates the number of rows.
• "custom"
  Allows you to specify a custom aggregate function using the calculateCustomSummary option.

When using the widget as an ASP.NET MVC Control, specify this option using the SummaryType enum. This enum accepts the following values: Sum, Min, Max, Avg, Count and Custom.

See Also

• Total Summary

See the format section for details on accepted values.

See Also

• Format Text and Value