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     RepositoryItemLookUpEdit Members
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      AcceptEditorTextAsNewValue Property
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 End-User Documentation
View this topic on docs.devexpress.com (Learn more)

RepositoryItemLookUpEdit.Columns Property

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

Namespace:DevExpress.XtraEditors.Repository
Assembly:DevExpress.XtraEditors.v19.2.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 modify columns displayed in the popup window. Set the column's LookUpColumnInfo.FieldName property to bind this column to a data source field (see RepositoryItemLookUpEditBase.DataSource). If no field with such a name was found, the column is treated as "unbound" and you need to handle the GetNotInListValue event to supply this column with data.

If you manually add LookUpEdit columns before the editor is initialized, it will not retrieve columns from a data source and only show your manually added columns. To show both custom columns and those retrieved from a data source, call the PopulateColumns method. You may also need to call the ForceInitialize method to ensure the editor is fully initialized before you start any customizations.

Expanded Example

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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