Siverlight Change Report Does Not Render New Report

[Brian Wilkinson]

In my little silverlight application I've just bound up the ReportViewers Report Property to the selected item of a combobox. When I change the selected report the report viewer does not render the new report apart for the first time you select a report, it always stays the same as the original report generated.
I've checked on the server to ensure the new report is being passed back to the server correctly and in RenderAndCache, the report is passed back correctly.
The combobox is populated form calling the server to get available reports.


Can anyone help with what I'm doing wrong.

Regards
             Brian Wilkinson

[Peter]

Hi Brian,

Check out the following code snippet that illustrates how to accomplish your requirement. If you still experience any difficulties please open a support thread and send us a sample project that exhibits the issue to debug on our end.

public class MainPageModel : INotifyPropertyChanged
  {
      static readonly ReportInfo noReportInfo = new ReportInfo { Name = "No report." };
      static readonly ReportInfo loadingReportInfo = new ReportInfo { Name = "Loading reports..." };

      ReportServiceClient serviceClient;
      string reportServiceUri;
      bool hasReports;
      ReportInfo selectedReportInfo;
      IList<ReportInfo> availableReports;

      public event PropertyChangedEventHandler PropertyChanged;

      public ReportInfo SelectedReport
      {
          get { return this.selectedReportInfo; }
          set
          {
              this.selectedReportInfo = value;
              this.NotifyPropertyChanged("SelectedReport");
          }
      }

      public string ReportServiceUri
      {
          get { return this.reportServiceUri; }
          set
          {
              if (null != this.serviceClient)
              {
                  this.serviceClient.ListAvailableReportsCompleted -= this.OnListAvailableReportsCompleted;
                  this.serviceClient = null;
              }

              this.reportServiceUri = value;
              this.NotifyPropertyChanged("ReportServiceUri");

              if (!string.IsNullOrEmpty(this.reportServiceUri) && !DesignerProperties.IsInDesignTool)
              {
                  this.serviceClient = new ReportServiceClient(ReportViewer.EnsureAbsoluteUri(new Uri(this.reportServiceUri, UriKind.RelativeOrAbsolute)));
                  this.serviceClient.ListAvailableReportsCompleted += this.OnListAvailableReportsCompleted;
                  this.BeginLoadReports();
              }
          }
      }

      public bool HasReports
      {
          get { return this.hasReports; }
          set
          {
              this.hasReports = value;
              this.NotifyPropertyChanged("HasReports");
          }
      }

      public IList<ReportInfo> AvailableReports
      {
          get { return this.availableReports; }
          set
          {
              this.availableReports = value;
              this.NotifyPropertyChanged("AvailableReports");
          }
      }

      public MainPageModel()
      {
          this.HasReports = false;
      }

      void BeginLoadReports()
      {
          this.HasReports = false;

          this.AvailableReports = new [] { loadingReportInfo };
          this.SelectedReport = this.AvailableReports[0];

          this.serviceClient.ListAvailableReportsAsync();
      }

      void OnListAvailableReportsCompleted(object sender, ListAvailableReportsEventArgs e)
      {
          var reportAvailable = false;
          var reports = e.Reports;
          if (null != reports && reports.Count > 0)
          {
              this.AvailableReports = reports;
              reportAvailable = true;
          }
          else
          {
              this.AvailableReports = new[] { noReportInfo };
          }

          this.HasReports = reportAvailable;
          this.SelectedReport = this.AvailableReports[0];
      }

      void NotifyPropertyChanged(string propertyName)
      {
          if (null != this.PropertyChanged)
          {
              this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
          }
      }
  }

Regards,
Peter
the Telerik team