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我正在更新表格中的一行。表的子集显示在 DataGridView 中。当我更新行时,更改不会反映在 DataGridView 中。即使我在提交更改后调用 DataGridView.Invalidate() 和 DataGridView.Refresh(),我也必须关闭应用程序、重新启动并重新运行查询,然后才能看到更改。

相关代码是:

private void buttonUpdate_Click(object sender, EventArgs e)
{
    const int TICKETID_COLUMN = 0;

    String _ticketID = dataGridView1.CurrentRow.Cells[SOME_COLUMN].Value.ToString();

    UpdateRecord(_ticketID, textBoxTicketSource.Text,
                textBoxAboutSomeID.Text, textBoxCategoryID.Text, textBoxContactEmail.Text);
}

private void UpdateRecord(string ATicketID, string ATicketSource, string 
    AAboutSomeID, string ACategoryID, string AContactID)
{
    oracleConnection1.Open();
    OracleCommand ocmd = new OracleCommand();
    OracleTransaction ot;
    // Start a local transaction 
    ot = oracleConnection1.BeginTransaction(System.Data.IsolationLevel.ReadCommitted);
    // Assign transaction object for a pending local transaction 
    ocmd.Transaction = ot;
    ocmd.Connection = oracleConnection1;
    try
    {
        ocmd.CommandText = @"UPDATE ABC.CONCERTTICKETS 
                                     SET TICKETSOURCE = :p_TICKETSOURCE, 
                                     ABOUTSOMEID = :p_ABOUTSOMEID, 
                                     CATEGORYID = :p_CATEGORYID, 
                                     CONTACTEMAIL = :p_CONTACTEMAIL 
                                     WHERE TICKETID = :p_TICKETID";
        ocmd.Parameters.Add("p_TICKETSOURCE", ATicketSource);
        ocmd.Parameters.Add("p_ABOUTSOMEID", Convert.ToInt32(AAboutSOMEID));
        ocmd.Parameters.Add("p_CATEGORYID", Convert.ToInt32(ACategoryID));
        ocmd.Parameters.Add("p_CONTACTEMAIL", AContactID);
        ocmd.Parameters.Add("p_TICKETID", ATicketID);
        ocmd.ExecuteNonQuery();
        ot.Commit();

        Popul8TheGrid();

        dataGridView1.Invalidate();
        dataGridView1.Refresh();
    }
    catch (Exception e)
    {
        ot.Rollback();
        throw;
    }
    finally
    {
        oracleConnection1.Close();
    }
}

private void Popul8TheGrid()
{
    int iFromYear = dateTimePickerFrom.Value.Year;
    int iFromMonth = dateTimePickerFrom.Value.Month;
    int iFromDay = dateTimePickerFrom.Value.Day;
    int iToYear = dateTimePickerTo.Value.Year;
    int iToMonth = dateTimePickerTo.Value.Month;
    int iToDay = dateTimePickerTo.Value.Day;

    oracleCommand1.Parameters.Clear();
    oracleCommand1.Parameters.Add("iStartDate", new DateTime(iFromYear, iFromMonth, 
        iFromDay));
    oracleCommand1.Parameters.Add("iEndDate", new DateTime(iToYear, iToMonth, 
        iToDay));
    oracleCommand1.Parameters.Add("iCATEGORYID", 114);
    // OracleRef is apparently like OracleDbType.RefCursor;
    OracleRef or = new OracleRef("_or");
    oracleCommand1.Parameters.Add("cref", or);

    oracleConnection1.Open();

    oracleDataAdapter1.SelectCommand = oracleCommand1;
    oracleDataAdapter1.GetFillParameters();
    oracleDataAdapter1.Fill(oracleDataTable1);
    dataGridView1.DataSource = oracleDataTable1;

    oracleConnection1.Close();
}

更新:

根据霍尔的建议(我试图用评论回应,但它似乎被挂起):

好的,我现在有这个:

        oracleDataAdapter1.SelectCommand = oracleCommand1;
        oracleDataAdapter1.GetFillParameters();
        oracleDataAdapter1.Fill(oracleDataTable1);
        // I don't see a "Clear" method or some such...
        dataGridView1.DataSource = null;
        //dataGridView1.DataSource = oracleDataTable1;

        BindingSource b = new BindingSource(); 
        b.DataSource = oracleDataTable1; 
        dataGridView1.DataSource = b;
        b.ResetBindings(false);

        oracleConnection1.Close();

...并且它仍然可以正常工作 - 更新,但 DataGridView 直到我重新启动应用程序才知道它。

4

3 回答 3

5

Invalidate()不重新查询数据源的原因Refresh()是它们仅适用于事物的图形方面 - 它们都使控件的客户区无效并强制重绘,但问题是底层控件认为没有它的数据源发生了变化,因为它依赖于数据源来告诉它何时发生这种情况。

您需要的是您DataSource成为能够告诉正在发生的事情的东西,DataGridView例如 theBindingList<T>或 a BindingSource,两者都有订阅的ListChanged事件。DataGridView

我原以为DataTable当它改变时也会通知网格,但我要么弄错了,要么OracleDataTable不一样。

应该解决这个问题的是引入 aBindingSource并将其作为DataGridView. 然后让你OracleDataTable成为绑定源的数据源。如果这不起作用,您可以ResetBindings()在绑定源上调用该方法。

BindingSource b = new BindingSource();
b.DataSource = oracleDataTable1;
dataGridView1.DataSource = b;
于 2012-03-20T16:54:16.767 回答
1

尝试做:

dataGridView1.DataSource = null;
dataGridView1.DataSource = oracleDataTable1;
于 2012-03-20T16:53:51.650 回答
-2
dataGridView1.DataSource = null;
dataGridView1.DataBind();
dataGridView1.DataSource = oracleDataTable1;
dataGridView1.DataBind();
于 2012-03-20T19:14:57.107 回答