How to save changes of a dataGridView

First of all thank you both for yous answers:)

This is what I've tried but I'm getting the following message "Update requires a valid UpdateCommand when passed datarow collection with modified rows."

private void saveToolStripButton_Click(object sender, EventArgs e)
{
    try
     {
       da.Update(ds.Tables[0]);
     }
    catch (Exception ex){MessageBox.Show(ex.Message);}
}

Any suggestions?

  on click event you can write 

  da.Update(ds.Tables(0))




it may help you 

hi..
check this link..http://www.codeproject.com/Questions/482144/C-plushowplustoplussavepluschangesplusinplusdata

                      http://stackoverflow.com/questions/17807373/why-it-doesnt-save-changes-into-datatable-from-datagridview