刷新網格控件DevExpress

Question

我正在輪詢站點並更新我的數據源（SQLite表）。 該表在輪詢后立即正確更新。

XPCollection與該表關聯，並且XPCollection用作網格控件的數據源。

我的問題是：網格的數據未更新。 我必須打開和關閉應用程序才能看到他的新數據反映在網格中。

我嘗試了刪除數據源，刷新數據源的所有組合，但是似乎沒有任何效果。

以下是我用於輪詢和刷新Grid的代碼，

 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());
        }
    }

這是我的班級部分片段：

 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;
        }
    }

任何幫助將不勝感激，這正在引起頭痛。

Answer 1

您是否嘗試致電

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();
        }

為了你：

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

以下代碼解決了我的問題。

 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());
        }
    }

這是我用來保存數據的代碼；

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();

                    }