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Asked: 2026-05-11T18:16:58+00:00

I would like to append one DataTable to another DataTable. I see the DataTable

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I would like to append one DataTable to another DataTable. I see the DataTable class has two methods; "Load(IDataReader)" and "Merge(DataTable)". From the documentation, both appear to ‘merge’ the incoming data with the existing DataTable if rows exist. I will be doing the merge in a data access layer.

I could use an IDataReader and use the Load method to merge the DataTables. Or I could load a DataSet using the IDataReader, get the DataTable from the DataSet, and then use the Merge method to merge the DataTables.

I was wondering if someone could tell me which is the proper method to use?

Alternatively, let me know if you have a different suggestion on how to accomplish this task.

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1 Answer

  1. Editorial Team

    Merge takes a DataTable, Load requires an IDataReader – so depending on what your data layer gives you access to, use the required method. My understanding is that Load will internally call Merge, but not 100% sure about that.

    If you have two DataTables, use Merge.

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