Using a web service to bind data to datagridview and have updates

[CroCrew]

First off I would like to thank anyone that helps me with this.

What I am trying to do is populate a Datagridview (Windows Forms Application) from a web service.

First thing is to have a button’s onclick event populate the Datagridview and that I got working by having the web service return a dataset and bind it to the Datagridview.

The second thing is to have any changes that is done by the user in the Datagridview saved back to the database (MS-SQL) using another buttons onclick event.

Again any help/examples that you can post here would be very helpful.

Here is what I have so far:

namespace MainEvent
{
    public partial class Form1 : Form
    {
        ServiceReference1.WebService DoThis = new ServiceReference1.WebService();
        DataSet ds;
		
		//First button.
		private void btnFindAttendee_Click(object sender, EventArgs e)
        {
            ds = new DataSet();
            ds = DoThis.BuildFindAttendeesList();
			//dgvFoundRegisteredAttendees is the id of the Datagridview.
			dgvFoundRegisteredAttendees.DataSource = ds.Tables[0];
		}		
		
		//Second button.
        public void btnSaveAttendeesInformation_Click()
        {
            // ?????
        }
	}
}

[CroCrew]

Thanks {Mike D.} for your help on this. Working code below...

namespace MainEvent
{
	public partial class Form1 : Form
	{
		ServiceReference1.WebService DoThis = new ServiceReference1.WebService();
		DataSet ds;
 
        //First button.
		private void btnFindAttendee_Click(object sender, EventArgs e)
		{
			ds = new DataSet();
			ds = DoThis.BuildFindAttendeesList(); // This is the function from the web service that returns a dataset.

			//dgvFoundRegisteredAttendees is the id of the Datagridview.
			dgvFoundRegisteredAttendees.DataSource = ds;
			dgvFoundRegisteredAttendees.DataMember = "myData";
		}        

		//Second button.
		private void btnSaveAttendees_Click(object sender, EventArgs e)
		{
			DataSet ds = (DataSet)dgvFoundRegisteredAttendees.DataSource;
			DataSet dsChanges = ds.GetChanges();
			ds.Merge(DoThis.UpdateAttendeesList()); // This is the function from the web service that updates using a dataset that is passed in.
		}
	}
}