Home > SharePoint, SharePoint 2010 > SharePoint – Updating External Lookup Field

SharePoint – Updating External Lookup Field

Updating an external look up is a bit different compared to updating other look up fields.

Below is a small snippet which can help you with this task

SPBusinessDataField dataField = item.Fields["Field Display Name"] as SPBusinessDataField;
item[dataField.RelatedField] = EntityInstanceIdEncoder.EncodeEntityInstanceId(new object[] { NEWVALUE }); ;
item["Field_x0020_Internal_x0020_Name"] = newCRMNumber;

For getting SPBusinessDataField you need to get the fields from item which is the listitem we are trying to modify.

item.Fields["Field Display Name"] – This require you to pass the Field Display name

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