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   [Expand]BaseRepositoryItemCheckEdit Class
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   [Collapse]RepositoryItemLookUpEdit Class
     RepositoryItemLookUpEdit Members
     RepositoryItemLookUpEdit Constructor
    [Collapse]RepositoryItemLookUpEdit Properties
      AcceptEditorTextAsNewValue Property
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    [Expand]RepositoryItemLookUpEdit Events
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   [Expand]RepositoryItemLookUpEditBase Class
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   [Expand]RichTextEditBehaviorOptions Class
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    TimeEditStyle Enumeration
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 End-User Documentation

RepositoryItemLookUpEdit.Columns Property

Provides access to the collection of columns displayed in the dropdown window.

Namespace:DevExpress.XtraEditors.Repository
Assembly:DevExpress.XtraEditors.v17.1.dll

Expanded Syntax

Property value

Type: LookUpColumnInfoCollection
A LookUpColumnInfoCollection object specifying the columns displayed in the dropdown.

Expanded Remarks

Use the Columns property to add, remove and access columns displayed in the popup window. The column's LookUpColumnInfo.FieldName property allows you to bind the column to a field in the lookup data source (RepositoryItemLookUpEditBase.DataSource). If the field specified by LookUpColumnInfo.FieldName is not found in the data source, the column is processed in 'unbound' mode. Data for unbound columns needs to be provided with the GetNotInListValue event.

If no columns are explicitly created in the Columns collection, the lookup editor automatically creates columns (by calling the PopulateColumns method) at runtime when the editor's dropdown is invoked for the first time. You can manually call the PopulateColumns method in code to get access to columns and perform additional customization.

Expanded Example

Show Me

A complete sample project is available in the DevExpress Code Examples database at http://www.devexpress.com/example=T378801.

This example shows how to use an in-place LookUpEdit control (RepositoryItemLookUpEdit) for editing cells in a grid column.

The lookup editor in the example is used to edit the CategoryID field values from the Products list. However, instead of displaying category IDs, the editor will display corresponding category names in the edit box.

The main properties used to set up the LookUpEdit control are:
- DataSource - Specifies the lookup data source.
- ValueMember - Specifies the field from the lookup data source whose values match the editor's edit value.
- DisplayMember - Identifies the field from the lookup data source whose values match the editor's display text.

The following image shows the result.

Expanded See Also

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