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View this topic on docs.devexpress.com (Learn more)

TreeListColumn.SummaryFooterStrFormat Property

Gets or sets the format to display the SummaryFooter.

Namespace:DevExpress.XtraTreeList.Columns
Assembly:DevExpress.XtraTreeList.v19.2.dll

Expanded Syntax

Property value

Type: String
A string that specifies the format applied to the SummaryFooter.
The default is "{0}".

Expanded Remarks

A format string may specify any characters but the "{" and "}" characters have a special meaning. They are used for inserting summary values in the following combination: "{0}". When the summary value is displayed, this combination is substituted for the value itself.

If the SummaryFooter property is set to the SummaryItemType.Count value, you can use the following format string: "Total {0} records". For instance, if there are 5 nodes, the summary will be displayed as follows: "Total 5 records".

Generally, the format string is set in the following form:

<text>{0<:format character<precision specifier>>}<text>

Format specifiers are described in the Format Specifiers and Format Providers topic in MSDN.

If the SummaryFooterStrFormat property specifies an empty string, the summary value is displayed alone.

The Tree List pictured below demonstrates the summary calculated for the "Size(Bytes)" column. The SummaryFooterStrFormat property is set to the "Total Sum {0:n0}" string.

Expanded Example

The following example demonstrates how to calculate the sum for the column bound to the "Size(Bytes)" field. The function type and summary value formatting are set via the SummaryFooter and SummaryFooterStrFormat properties.

The AllNodesSummary property is set to true to calculate the summary across all nodes within the control. The TreeListOptionsView.ShowSummaryFooter option is enabled to display the summary footer.

Expanded Example

The following example creates a TreeList (see TreeList) at runtime and shows how to perform basic customization tasks:

  • Bind the treelist to a data source
  • Specify the key fields that form a hierarchy
  • Access automatically created columns
  • Set a custom row height
  • Customize column captions (using HTML tags) and cell appearance settings
  • Create unbound columns and create Excel-style format conditions based on these column values
  • Assign an in-place editor (a spin editor) to columns
  • Sort data
  • Calculate total summaries
  • Filter nodes
  • Hide columns and calculate column "best" widths
  • Locate and expand nodes
  • Focus a specific cell
  • Specify DataAnnotation attributes at the data source level (the "p0" display format for the MarketShare field)

Expanded See Also

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