Combining two results of datasets into one

Question

I have created a webservice which returns two datasets(return type) as results. Is it possible to combine two datasets results into one so that I can display it on one datalist? I try using arraylist but it returns nothing in datalist.

GetDepartureFlightsDetails() and getDepartureFlights() both returns a dataset values.

Below is the method i use to retrieve the webservice results.

public ArrayList GetDepartureFlightsDetails(String departurecountry, String arrivalcountry, DateTime departuredate)   
{
    DLSA datalayerTS = new DLSA();
    DLJS datalayerJW = new DLJS();

    ArrayList array = new ArrayList();

    array.Add(datalayerSA.GetDepartureFlightsDetails(departurecountry, arrivalcountry, departuredate));
    array.Add(datalayerJW.getDepartureFlights(departurecountry, arrivalcountry, departuredate));
    return array;
}

Answer 1

You can use the DataSet.Merge method:

firstDataSet.Merge(secondDataSet);

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Update:

public DataSet GetDepartureFlightsDetails(String departurecountry, String arrivalcountry, DateTime departuredate)
{
    DLSA datalayerTS = new DLSA();
    DLJS datalayerJW = new DLJS();

    var firstDataSet = datalayerSA.GetDepartureFlightsDetails(departurecountry, arrivalcountry, departuredate));
    var secondDataSet = datalayerJW.getDepartureFlights(departurecountry, arrivalcountry, departuredate));
    firstDataSet.Merge(secondDataSet);

    return firstDataSet;
}