在我的代码中,当点击按钮时,进度条被设置为跑马灯,然后调用BackgroundWorker,但是当调用BackgroundWorker时,进度条会冻结或消失。我使用BackgroundWorker将ReportViewer的RefreshReport方法与UI线程分离。感谢任何帮助。
Private Sub btnOtherReport_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOtherReport.Click
rvReport.ProcessingMode = ProcessingMode.Remote
rvReport.ShowParameterPrompts = False
rvReport.ServerReport.ReportServerUrl = New Uri("REPORT_SERVER_URL")
rvReport.ServerReport.ReportPath = "REPORT_PATH"
rvReport.BackColor = Color.White
BackgroundWorker1.RunWorkerAsync()
End Sub
Private Sub BackgroundWorker1_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
RefreshReport()
End Sub
Private Sub BackgroundWorker1_RunWorkerCompleted(ByVal sender As Object, ByVal e As System.ComponentModel.RunWorkerCompletedEventArgs) Handles BackgroundWorker1.RunWorkerCompleted
pbReports.Style = ProgressBarStyle.Blocks
pbReports.Value = 100
End Sub
Public Sub RefreshReport()
rvReport.BeginInvoke(New MethodInvoker(AddressOf rvReport.RefreshReport))
End Sub