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

RowProperties.RowHandle Property

Gets the position of the associated field within a data source.

Namespace:DevExpress.XtraVerticalGrid.Rows
Assembly:DevExpress.XtraVerticalGrid.v19.2.dll

Expanded Syntax

Property value

Type: Int32
An integer value representing the zero-based index of the corresponding field within a data source.

Expanded Remarks

When a vertical grid control is in bound mode, it can display field values from the associated data source with the help of row items. Row items can be bound to data source fields via the FieldName property. If a row item is bound to a field, the RowHandle property returns the index of the bound field within the associated data source, otherwise it returns -1.

When working in Unbound Mode, the VGridControl.DataSource property is set to null (Nothing in Visual Basic). Hence, row items are not bound to any field. In this case, the RowHandle property of any row item returns -1.

You can use specific overloaded variants of the VGridControlBase.GetCellValue and VGridControlBase.SetCellValue methods to correspondingly obtain or set the value of the data cell specified by its row handle and the corresponding record's index.

Expanded Example

The following example demonstrates how to use the RowHandle property to organize grid rows into the sequence order of their associated data fields. This example assumes that the following conditions should or may take place:

  • The grid is created and bound to a data source.
  • Grid rows are linked to certain data fields.
  • Initial row structure may not follow the order of fields in the data source.
  • The grid may contain several multi-editor rows.
  • Each editor row (or item in a multi-editor row) may be associated with a particular editor used to display and edit its data values.

This example visits each grid row and performs an operation represented by the RowOperationRestoreOrder class instance. This class is the RowOperation class descendant. Row operations implemeted by this class hide all category rows to the Customization Form, separate multi-editor rows (if any) into individual editor rows and move all rows to the top level.

Finally, rows in the VGridControlBase.Rows collection are reordered to follow the order of associated fields in the linked data source.

The image below shows how rows are organized in the grid control before and after code execution.

Expanded See Also

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