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Docs > ASP.NET WebForms Controls > Card View > Concepts > Data Representation Basics > Columns > Unbound Columns > Unbound Columns Overview
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Unbound Columns Overview

Unbound columns are not bound to any field in a data source. These columns must be populated manually using the ASPxCardView.CustomUnboundColumnData event.

An unbound column meets the following requirements.

  • Its CardViewColumn.FieldName property must be set to a unique value and not refer to any field in ASPxCardView‘s data source.
  • The column’s CardViewColumn.UnboundType property must be set to an appropriate value based on the type of data the column is supposed to display (Boolean, DataTime, Decimal, Integer, String, Object). It shouldn’t be set to UnboundColumnType.Bound.