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VB.NET BackgroundWorker.IsBusy属性代码示例

本文整理汇总了VB.NET中System.ComponentModel.BackgroundWorker.IsBusy属性的典型用法代码示例。如果您正苦于以下问题:VB.NET BackgroundWorker.IsBusy属性的具体用法?VB.NET BackgroundWorker.IsBusy怎么用?VB.NET BackgroundWorker.IsBusy使用的例子?那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在System.ComponentModel.BackgroundWorker的用法示例。


在下文中一共展示了BackgroundWorker.IsBusy属性的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。

示例1:

Private Sub downloadButton_Click( _
    ByVal sender As Object, _
    ByVal e As EventArgs) _
    Handles downloadButton.Click

    ' Start the download operation in the background.
    Me.backgroundWorker1.RunWorkerAsync()

    ' Disable the button for the duration of the download.
    Me.downloadButton.Enabled = False

    ' Once you have started the background thread you 
    ' can exit the handler and the application will 
    ' wait until the RunWorkerCompleted event is raised.

    ' If you want to do something else in the main thread,
    ' such as update a progress bar, you can do so in a loop 
    ' while checking IsBusy to see if the background task is
    ' still running.
    While Me.backgroundWorker1.IsBusy
        progressBar1.Increment(1)
        ' Keep UI messages moving, so the form remains 
        ' responsive during the asynchronous operation.
        Application.DoEvents()
    End While
End Sub
开发者ID:VB.NET开发者,项目名称:System.ComponentModel,代码行数:26,代码来源:BackgroundWorker.IsBusy


注:本文中的System.ComponentModel.BackgroundWorker.IsBusy属性示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。