private void SupportsComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
if(this.SupportsComboBox.SelectedItem == null)
{
this.SupportTypeComboBox.DataSource = null;
return;
}
DatabaseHelper createdb = new DatabaseHelper();
this.SupportTypeComboBox.DataSource =
createdb.selectSupportTypeName(this.SupportsComboBox.SelectedItem.ToString());
this.SupportTypeComboBox.SelectedItem = null;
}
