如何在 MainWindow 中绑定 WPF DatePicker 以便在 UserControl 中使用？

Question

我在 MainWindow.xaml 上放置了两个 DatePicker 控件，如下所示：

<DatePicker Name="dpStartDate"
                    SelectedDate="{Binding Path=StartDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                    DisplayDateStart="1/1/2018"
                    FirstDayOfWeek="Sunday"/>
        <Label Name="lblEndDate" Content ="End Date:"/>
        <DatePicker Name="dpEndDate"
                    SelectedDate = "{Binding Path = EndDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                    DisplayDateStart="1/1/2018"
                    FirstDayOfWeek="Sunday"/>

我的目的是让所有条目用户控件查询后端数据（在本例中为 Quickbooks）和 return 与 MainWindow DatePicker 控件中的开始和结束日期值匹配的记录。

AllEntriesclass如下：

private void EntriesDataGrid_OnLoaded(object sender, RoutedEventArgs e)
    {
        bool sessionBegun = false;
        bool connectionOpen = false;
        DatePicker dpStartDate;
        DatePicker dpEndDate;
        QBSessionManager sessionManager = null;

        try
        {
            //Create Session Manager
            sessionManager = new QBSessionManager();

            //Create the request to obtain the Profit and Loss Summary Report
            IMsgSetRequest requestMsgSet = sessionManager.CreateMsgSetRequest("US", 8, 0);
            requestMsgSet.Attributes.OnError = ENRqOnError.roeContinue;

            //Connect to QB Desktop and begin a Session
            sessionManager.OpenConnection(
                @"C:\Users\Public\Public Documents\Intuit\QuickBooks\Company Files\MyCompany.QBW",
                "MyCompany");

            connectionOpen = true;
            sessionManager.BeginSession("", ENOpenMode.omDontCare);
            sessionBegun = true;

            IGeneralDetailReportQuery plQuery = requestMsgSet.AppendGeneralDetailReportQueryRq();
            plQuery.GeneralDetailReportType.SetValue(ENGeneralDetailReportType.gdrtTxnListByDate);
            plQuery.DisplayReport.SetValue(true);
            //TODO:  Set FromReportDate and ToReportDate equal to plStartDate.SelectedDate and plEndDate.SelectedDate
            //plQuery.ORReportPeriod.ReportPeriod.FromReportDate = ;
            //plQuery.ORReportPeriod.ReportPeriod.ToReportDate = ;
            IMsgSetResponse responseMsgSet = sessionManager.DoRequests(requestMsgSet);
            IResponse response = responseMsgSet.ResponseList.GetAt(0);
            IORReportData reportData = (IORReportData)response.Detail;

            //TODO: Create list of report items building from model class(es).
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "Error");
        }
        finally
        {
            if (sessionBegun)
            {
                sessionManager.EndSession();
            }

            if (connectionOpen)
            {
                sessionManager.CloseConnection();
            }
        }
    }

如何从 MainWindow 绑定 DatePicker 值并将它们用作查询请求的变量？

Answer 1

为 UserControl 提供两个 public 类型 DateTime? 的依赖属性。在绑定中使用 ElementName 将这些属性绑定到日期选择器的值。

我认为您会希望在依赖项属性值更改时更新 AllEntries，而不是仅在 OnLoaded() 中更新。我敦促你把 OnLoaded() 的内容全部放在另一个名为 RunQuery() 的方法中，然后从 OnLoaded()、从依赖项属性更改的处理程序中调用该方法，或者任何地方。

如何在 MainWindow 中绑定 WPF DatePicker 以便在 UserControl 中使用？

How to Bind WPF DatePicker in MainWindow for Use in a UserControl?

c#

wpf

data-binding

quickbooks