How to update a temp table column in D365 FO

 [ExtensionOf(classStr(AssetRollForwardDP))]

final class AssetRollForwardDP_My_Extension

{

 //  Overriding getAssetRollForwardTmp() as it is returning the temp table buffer.

 public AssetRollForwardTmp getAssetRollForwardTmp(AssetRollForwardContract _contract, Query _query)

    {

        AssetRollForwardTmp assetRollForwardTmpUpd;        

        AssetTable      assetTableBuf;         

        next  getAssetRollForwardTmp(_contract, _query);   

        assetRollForwardTmpUpd.linkPhysicalTableInstance(assetRollForwardTmp);

               

        update_recordset assetRollForwardTmpUpd

            setting 

                AssetName = assetTableBuf.AdditionalName

            join AdditionalName from assetTableBuf

            where assetRollForwardTmpUpd.assetid == assetTableBuf.AssetId;

        return assetRollForwardTmp;

    }

}

How to use From Datasource Level Record Writing Event In D365 FO

 

Public class My_LedgerJourTransAssetFrm_EventHandler

{  

     /// <summary>

    ///

    /// </summary>

    /// <param name="sender"></param>

    /// <param name="e"></param>

    [FormDataSourceEventHandler(formDataSourceStr(LedgerJournalTransAsset, LedgerJournalTrans_Asset), FormDataSourceEventType::Writing)]

    public static void LedgerJournalTrans_Asset_OnWriting(FormDataSource sender, FormDataSourceEventArgs e)

    {

        LedgerJournalTrans_Asset       LedgerJourTransAssetTableLoc = sender.cursor();

        LedgerJourTransAssetTableLoc.AdditionalName = AssetTable::find(LedgerJourTransAssetTableLoc.Assetid).AdditionalName;

    }

}