DataRow row = dataTable.Rows [currRec]; 

// update data in DataSet from data entry WinForm  
row.BeginEdit (); 
row ["Title"] = txtTitle.Text; 
row ["FirstName"] = txtFirstName.Text; 
row ["MiddleName"] = txtMiddleName.Text; 
row ["LastName"] = txtLastName.Text; 
row ["Suffix"] = txtSuffix.Text; 
row ["Phone"] = txtPhone.Text; 
row ["EmailAddress"] = txtEmailAddress.Text; 
row.EndEdit (); 
  
try
{
    dataAdapter.Update (dataSet, "Person.Contact");
} 
catch (System.Runtime.InteropServices.ExternalException exc) 
{ 
    MessageBox.Show (exc.Message); 
}

quote:

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Cannot insert the value NULL into column 'PasswordHash', table 'AdventureWorks.Person.Contact'; column does not allow nulls. INSERT fails. The statement has been terminated.

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