Understanding how to Enable or disable and to use allow edit the Table fields in form Grid level with X++ Code.

Using the form DataSource (ie. The DataSources which are in Form DataSource level can be accessed through DataSourceName_ds from any where in the Custom form ) this will return the current cursor where the record is active in the Grid, To assign the current Cursor to the table buffer use

TableName buffer =  DataSourceName.cursor();

Using the below way we can use the allow edit of the particular record that is active in cursor.

SalesLine_ds.object(fieldNum(SalesLine, lineno)).allowEdit(true);

SalesLine_ds.object(fieldNum(SalesLine, lineno)).allowEdit(false);

SalesLine_ds.object(fieldNum(SalesLine, lineno)).enabled(true);

SalesLine_ds.object(fieldNum(SalesLine, lineno)).enabled(false);