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 End-User Documentation

RepositoryItemLookUpEdit.GetKeyValueByDisplayValue Method

Returns a value of the RepositoryItemLookUpEditBase.ValueMember field of the row containing the specified RepositoryItemLookUpEditBase.DisplayMember field value.

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

Expanded Syntax

Parameters

displayValue
Type: Object
The value of the RepositoryItemLookUpEditBase.DisplayMember field for the row to locate.

Return value

Type: Object
The value of the RepositoryItemLookUpEditBase.ValueMember field for the row located. null if no record with the specified value was found (System.DBNull.Value when the data source is a System.Data.DataView object).

Expanded Remarks

The GetKeyValueByDisplayValue method searches for the record containing the specified display value (value of the RepositoryItemLookUpEditBase.DisplayMember field) and returns the key value it contains. The key value is retrieved from the RepositoryItemLookUpEditBase.ValueMember field of the record located. This method returns the key value of the first record found.

RepositoryItemLookUpEditBase.ValueMember and RepositoryItemLookUpEditBase.DisplayMember properties represent the field names you need to specify to set up a lookup editor.

The row currently selected in a lookup editor is determined by the BaseEdit.EditValue property value and this matches the value of the rows's RepositoryItemLookUpEditBase.ValueMember field. The value of the RepositoryItemLookUpEditBase.DisplayMember field of the selected row is displayed in the edit box.

To get the display value by the record's key value, see the GetDisplayValueByKeyValue function.

The GetKeyValueByDisplayText and GetKeyValueByDisplayValue methods perform a search among rows that are present in the LookUp editor's dropdown. If a target row has been hidden due to filtering (see SearchMode), these methods will return null.

Expanded See Also

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