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（本例中为Quickbooks），并返回与MainWindow DatePicker控件中的开始和结束日期值匹配的记录。

AllEntries类如下：

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();
            }
        }
    }

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

Answer 1

为UserControl提供类型为DateTime?的两个公共依赖项属性。将这些属性绑定到绑定中带有ElementName的日期选择器的值。

我认为您希望在依赖项属性值更改时更新AllEntries，而不是仅在OnLoaded()中更新。我强烈建议您使用OnLoaded()的内容并将其全部放在另一个名为RunQuery()的方法中，然后从OnLoaded()，依赖属性更改处理程序或任何位置调用该方法。

如何在MainWindow中绑定WPF DatePicker以在UserControl中使用？

1 个答案: