Question

我正在轮询网站并更新我的数据源（SQLite表）。该表在轮询后立即正确更新。

XPCollection与表关联，XPCollection用作网格控件的DataSource。

我的问题是：Grid的数据没有更新。我必须打开和关闭应用程序才能看到他在网格中反映的新数据。

我已经尝试了删除数据源，刷新数据源的所有组合，但似乎没有任何效果。

下面是我的用于轮询和刷新网格的代码，

 private async void WaitForXSeconds()
    {
        for (int i = 0; i < 100; i++)
        {
            await System.Threading.Tasks.Task.Delay(TimeSpan.FromSeconds(60));
            // do something after x seconds!
            // Updates the DB with new/modified data
            LoadDailyButton_Click(null, null);

            BestGrid.DataSource = null;

            BestGrid.DataSource = BestCollection;

            string starttime = System.DateTime.Now.ToString();
            CycleResultsListBox.Items.Add("Cycle Started : " + starttime.ToString());
        }
    }

以下是我班级外观的部分摘录：

 public class BestData : XPLiteObject
{
    private int id;

    [Key(true)]
    public int Id
    {
        get { return id; }
        set
        {
            id = value;
        }
    }

    private DateTime gameDate;

    public DateTime GameDate
    {
        get { return gameDate; }
        set
        {
            gameDate = value;
        }
    }

    private string hometeamName;

    public string HomeTeamName
    {
        get { return hometeamName; }
        set
        {
            hometeamName = value;
        }
    }

任何帮助都会受到赞赏，这一点令人头疼。

Answer 1

你试过打电话吗

BestGrid.DataBind（）;在BestGrid.DataSource = xxx

之后

private async void WaitForXSeconds()
{
    for (int i = 0; i < 100; i++)
    {
        await System.Threading.Tasks.Task.Delay(TimeSpan.FromSeconds(60));
        // do something after x seconds!
        // Updates the DB with new/modified data
        LoadDailyButton_Click(null, null);
        BestGrid.DataSource = null;
        BestGrid.DataSource = BestCollection;
        Bestgrid.DataBind();
        string starttime = System.DateTime.Now.ToString();
        CycleResultsListBox.Items.Add("Cycle Started : " + starttime.ToString());
    }
}

Édit1

gridControl1.BeginUpdate();
        try
        {
            gridView1.Columns.Clear();
            gridControl1.DataSource = null;
            gridControl1.DataSource = <newDataSource>;
        }
        finally
        {
            gridControl1.EndUpdate();
        }

对你：

for (int i = 0; i< 100; i++)
{
    await System.Threading.Tasks.Task.Delay(TimeSpan.FromSeconds(60));
    // do something after x seconds!
    // Updates the DB with new/modified data
    LoadDailyButton_Click(null, null);

    gridControl1.BeginUpdate();

    BestGrid.DataSource = null;
    BestGrid.DataSource = BestCollection;

    gridControl1.EndUpdate();

    string starttime = System.DateTime.Now.ToString();
    CycleResultsListBox.Items.Add("Cycle Started : " + starttime.ToString());
}

Answer 2

以下代码解决了我的问题。

 private async void WaitForXSeconds()
    {
        for (int i = 0; i < 100; i++)
        {
            await System.Threading.Tasks.Task.Delay(TimeSpan.FromSeconds(300));
            // do something after x seconds!
            // Updates the DB with new/modified data
            LoadDailyButton_Click(null, null);


            gridView2.CollapseAllDetails();
            BestGrid.DataSource = null;
            session1.DropIdentityMap();
            BestCollection.Reload();
            BestGrid.DataSource = BestCollection;

            string starttime = System.DateTime.Now.ToString();
            CycleResultsListBox.Items.Add("Cycle Started : " + starttime.ToString());
        }
    }

以下是我用来保存数据的代码;

using (var uow = new UnitOfWork(xsession.DataLayer))
                    {
                        BestData getSingleRec = new XPCollection<BestData>(uow, CriteriaOperator.Parse("[HomeTeamName]=? AND [GameDate]=?", tempStr5.ToString(), Convert.ToDateTime(gameDate))).FirstOrDefault();


                                getSingleRec.awayR = Convert.ToInt16(tempStr7);
                                getSingleRec.homeR = Convert.ToInt16(tempStr8);
                                getSingleRec.awayML = tempStr2;
                                getSingleRec.homeML = tempStr3;


                            getSingleRec.Save();
                            uow.CommitChanges();

                    }

刷新网格控件DevExpress

2 个答案: