表适配器更新方法不更新数据网格

我正在创建一个应用程序，它需要获取字段的值，添加一些内容，然后更新该字段。它编译和运行得很好。但是，当我在应用程序(在数据网格中)以及实际的数据库中检查字段时，这实际上并没有更新字段。

这里是我更新行的地方。

//This used to be: foreach (DataRow row in momDataSet.Clients.Rows)
//However, this doesn't seem to have any rows
foreach (DataRow row in clientsTableAdapter.GetData().Rows)
        {
            //all of these used to be row.ItemArray[]  
            if (row[6].Equals(clientID))
            {
                double oldAmt = Convert.ToDouble(row[8].ToString());
                double newAmt = oldAmt + amt;
                row[8] = newAmt;
                try
                {
                    // Tried momDataSet.AcceptChanges() here
                    this.clientsTableAdapter.Update(row);
                    //I tried momDataSet.AcceptChanges() after the update too
                }
                catch (Exception exc)
                {
                    MessageBox.Show(exc.Message.ToString(), "Database Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                }
            }
        }   

这是我在应用程序中看到的数据网格。我打开一个表单来运行上面的代码，然后打开另一个表单来检查它。

public partial class frmSearch : Form
{
    public frmSearch()
    {
        InitializeComponent();
        this.clientsTableAdapter.Fill(momDataSet.Clients);
    }

这是Update命令文本

UPDATE `Clients` SET `Last Name` = ?, `First Name` = ?, `E-mail Address` = ?, `Phone Number` = ?, `Rate` = ?, `Billing Type` = ?, `Outstanding balance` = ?, `Last Billed` = ?, `Notes` = ? WHERE (((? = 1 AND `Last Name` IS NULL) OR (`Last Name` = ?)) AND ((? = 1 AND `First Name` IS NULL) OR (`First Name` = ?)) AND ((? = 1 AND `E-mail Address` IS NULL) OR (`E-mail Address` = ?)) AND ((? = 1 AND `Phone Number` IS NULL) OR (`Phone Number` = ?)) AND ((? = 1 AND `Rate` IS NULL) OR (`Rate` = ?)) AND ((? = 1 AND `Billing Type` IS NULL) OR (`Billing Type` = ?)) AND (`ClientID` = ?) AND ((? = 1 AND `Outstanding balance` IS NULL) OR (`Outstanding balance` = ?)) AND ((? = 1 AND `Last Billed` IS NULL) OR (`Last Billed` = ?)))

我没有数据库的本地副本-插入工作很好。有一个更新方法(它自动完成在VS)。每张桌子都有一个PK。

未启用刷新表的选项(edit data set ->右键单击表(在我的例子中是Clients) -> configure -> advanced options)。我正在使用OLEDB连接，我猜它们不兼容?