我试图升级基于BackgroundWorker的方法以使用来自Microsoft.Bcl.Async库的异步调用。我遇到的麻烦是繁忙的指标不再适用于新的异步功能(我是新来的)。繁忙指示符不显示,GUI执行时冻结,然后在完成时解冻。我不知道我做错了什么......BusyIndicator不从异步方法显示
XAML代码:
<Border BorderBrush="Black" BorderThickness="1" CornerRadius="5,5,15,15" Background="#FFA8A9AC" Grid.Column="1" Grid.Row="1">
<Grid x:Name="UIGrid">
<toolkit:BusyIndicator x:Name="BusyIndicator" IsBusy="{Binding Instance.IsBusy}" BusyContent="{Binding Instance.BusyMessage, TargetNullValue='Please wait...'}" >
<Grid x:Name="ScreenGrid" />
</toolkit:BusyIndicator>
</Grid>
</Border>
代码
// Button click handler.
private async void NewReportClick(object sender, RoutedEventArgs e)
{
SystemLog.Trace(this);
await this.CreateReport();
}
// Async implementation.
private async Task CreateReport()
{
SystemLog.Trace(this);
await this.CloseReport();
BusinessLogic.Instance.BusyMessage = "CREATING new report...";
BusinessLogic.Instance.IsBusy = true;
await BusinessLogic.Instance.ReportManager.CreateReport();
BusinessLogic.Instance.IsBusy = false;
BusinessLogic.Instance.BusyMessage = null;
}
编辑: 要回复@乔恩飞碟双向,这里是重要的CreateReport的部分:
public async Task CreateReport()
{
SystemLog.Trace(this);
var internalReportId = GenerateReportId();
var rpt = await ReportFactory.Create();
rpt.InternalReportId = internalReportId;
rpt.EnableNotifications = true;
ReportRepository = new ReportRepository();
await SaveReport(rpt);
// Set the active report.
BusinessLogic.Instance.ActiveReport = rpt;
await AssignReportNumber(MediViewData.Instance.ActiveReport);
}
public async static Task<Report> Create()
{
var rpt = new Report();
/** Set several fields to default values. */
return rpt;
}
ReportManager.CreateReport是做什么的?如果这只是同步执行,那么它不会帮助你... – 2013-04-25 22:21:08
我已经添加了一些代码,希望澄清它在做什么。有什么东西突出是错的吗? – dythim 2013-04-25 22:44:59
那么哪个位实际需要时间?它是“SaveReport”吗? * *看起来像什么?基本上,我怀疑你实际上在做同步调用的大部分工作。 – 2013-04-25 22:51:48