currencymanager dataset gridview

[prostoy]

private void button2_Click(object sender, EventArgs e)
{
//Search Button
.
.
.
PA_Assets.Assets myassets = new PA_Assets.Assets();//new Asset (webservice) class
PA_Assets.Filters myfilters = new PA_Asset

DataSet source = myassets.GetFilteredAssets(myfilters);//set dataset to database
dataGridView1.DataSource = source.Tables[0]; //set grid to dataset
.
.
.
}




private void button1_Click(object sender, EventArgs e)
{
//Update Button
PA_Assets.Assets myassets = new PA_Assets.Assets();
DataSet source = ((DataTable)dataGridView1.DataSource).DataSet;


PA_Assets.PA_RETURN_CODE result;
result = myassets.UpdateAssets(source);


//DataSet ds = myassets.GetAllAssets();//why doesn't this work??
//Why do we have to bind this new dataset w/ the dataGridView1??

MessageBox.Show("Items updated successfully");
}


Hi, could someone please explain why i have to bind the new dataset to the dataGridView1 in order for my program to work, e.g.

DataSet ds = myassets.GetAllAssets();//new refreshed dataset
((DataTable)DataGridView1.DataSource).Dataset = ds;


I think it has to do a lot with currencymanager, but i can't figure out how it works, thanx.