C1Dialog show vs ShowOnLoad in RowCommand and hide in Close action 2025v2 399

C1Dialog show vs ShowOnLoad in RowCommand and hide in Close action 2025v2 399

Posted by: enrique.pv-ext on 25 March 2026, 11:19 am EST

• 

  enrique.pv-ext

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  Posted 25 March 2026, 11:19 am EST

  Hi,
  
  Migrate from 2010v1 to 2025v2 399 in ASP.NET WebForms NET Framework 4.8.1.
  
  Migrating C1Window to C1Dialog 2025v2 399.
  
  Using C1Dialog from C1.Web.Wijmo.Controls.48.dll

  I use UserControl for ReportViewer + C1Dialog:

   C1GridView1_RowCommand: 
                  ReportViewerUC.ShowReport(report, exportedFileName);

  ShowOnLoad problem: show Dialog for each postback !!

  public void ShowReport(C1ReportV48.C1Report report, string exportedFileName, bool fullScreen = false, string zoom = "100%")
          {
              string docKey = "report";
              C1ReportViewer.RegisterDocument(docKey, () => report);
              ReportViewer.ReportName = docKey;
              ReportViewer.FileName = docKey; 
              ReportViewer.ExportedFileName = exportedFileName;
              ReportViewer.FullScreen = fullScreen;
              ReportViewer.Zoom = zoom;
  
              ReportDialog.ShowOnLoad = true;
  
              UpdatePanelReport.Update();
          }

  How-to reset “state” for C1Dialog (in my usercontrol) ?
  
  not use ShowOnLoad , any “Show” method ?
  
  and when I click X (pin close), hide o close de Dialog, and reset state to hidden…

  any good practices for Show/Open and Hide/Close the C1Dialog control ?

  thanks a lot!!

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  enrique.pv-ext

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  Posted 26 March 2026, 4:58 am EST

  I try this using c1dialog open

             ReportDialog.ShowOnLoad = false;
              ScriptManager.RegisterStartupScript(
                  this,
                  this.GetType(),
                  "openDialog",
                  "Sys.Application.add_load(function(){ $('#" + ReportDialog.ClientID + "').c1dialog('open'); });",
                  true
              );

  NOT working, if I do again postaback async partial (Search button), it’s appears popup C1Dialog.
  
  Only should be appears when I click action OnRowCommand…

          public void ShowReport(C1ReportV48.C1Report report, string exportedFileName, bool fullScreen = false, string zoom = "100%")
          {
              string docKey = "report";
  
              // Registrar documento dinámico
              C1ReportViewer.RegisterDocument(docKey, () => report);
  
              ReportViewer.ReportName = docKey;
              ReportViewer.FileName = docKey; 
              ReportViewer.ExportedFileName = exportedFileName;
  
              ReportViewer.FullScreen = fullScreen;
              ReportViewer.Zoom = zoom;
  
  
              ReportDialog.ShowOnLoad = false;
              ScriptManager.RegisterStartupScript(
                  this,
                  this.GetType(),
                  "openDialog",
                  "Sys.Application.add_load(function(){ $('#" + ReportDialog.ClientID + "').c1dialog('open'); });",
                  true
              );
  
  
              UpdatePanelReport.Update();
          }

  Any suggestions, please?
  
  Any help very appreciated will be
  
  Thanks a lot

• 

  uttkarsh.matiyal

  

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  Posted 27 March 2026, 2:55 am EST

  Hello Enrique,

  The sample we shared in the following thread of yours has the same implementation as you described here:
  
  https://developer.mescius.com/forums/webforms-edition/good-patterns-practices-for-c1reportviewer-registerdocument-2025v2-399

  However, in our sample we don’t observe C1Dialog displaying on postback. Could you please test our sample and let us know if it reproduces the behavior?

  • If it does, please share the exact step to reproduce the behavior for us to investigate and suggest you best approach to handle it.

  • If it does not, please update our sample with your implementation so that it replicates the behavior for further investigation.

  Regards,
  
  Uttkarsh.

• 

  enrique.pv-ext

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  Posted 30 March 2026, 4:49 am EST

  the exact step to reproduce the behavior

  1. click show Report button for row 1
  2. the ReportViewer popup is open
  3. closes the popup
  4. click page 2 (pagination)
  5. the popup appears again !!
• 

  uttkarsh.matiyal

  

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  Posted 31 March 2026, 1:54 am EST

  Hello Enrique,

  The problem is that ReportDialog.ShowOnLoad = true is being set in RowCommand, and this value is persisted in ViewState. When you click page 2, a postback occurs, the dialog’s ShowOnLoad is still true from ViewState, and it re-opens the popup.
  
  Fix: Reset ReportDialog.ShowOnLoad = false in Page_Load (or Page_Init) on every postback, so it only fires when explicitly triggered by RowCommand.
  
  In Default.aspx.cs:

  csharpprotected void Page_Load(object sender, EventArgs e)
  {
      if (!IsPostBack)
      {
          var dt = BuildDataSource();
          Session[SESSION_DATA_SOURCE] = dt;
  
          string allIds = string.Join(",",
              dt.AsEnumerable().Select(r => r["ID"].ToString()));
  
          HSelectionAll.Value = "false";
          HSelected.Value     = "";
          HUnselected.Value   = allIds;
          HAllItems.Value     = allIds;
  
          BindGrid(dt);
      }
      else
      {
          // *** FIX: Always reset the dialog on every postback.
          // RowCommand will set it back to true only when a report button is clicked.
          ReportDialog.ShowOnLoad = false;
      }
  }

  Please let us know if you still face the issue at your end.

  Regards,
  
  Uttkarsh.

• 

  enrique.pv-ext

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  Posted 31 March 2026, 2:46 am EST

  Great, that working

  I was trying:

          public void ShowReport(C1ReportV48.C1Report report, string exportedFileName, bool fullScreen = false, string zoom = "100%")
          {
              string docKey = "report";
  
              // Registrar documento dinámico
              C1ReportViewer.RegisterDocument(docKey, () => report);
  
              ReportViewer.ReportName = docKey;
              ReportViewer.FileName = docKey;
              ReportViewer.ExportedFileName = exportedFileName;
  
              ReportViewer.FullScreen = fullScreen;
              ReportViewer.Zoom = zoom;
  
  
              ReportDialog.ShowOnLoad = false;
  
              var script = @"
                          function openDialogForReportViewer() {
                              var windowId = '" + ReportDialog.ClientID + @"';
              			    var dialog = $(""#"" + windowId);
                              if (dialog) {
                                      dialog.c1dialog({
                                          title: 'ReportViewer',
                                          modal: true
                                      });
                                      dialog.c1dialog({ position: 'center' });
                                      dialog.c1dialog('open');
                                      console.log('ShowReport. Dialog ejecutado correctamente.');
                              } else {
                                  console.warn('ShowReport. Componente no encontrado: " + ReportDialog.ClientID + @"');
                              }
  
                             Sys.Application.remove_load(arguments.callee);  
                          }
                          Sys.Application.add_load(openDialogForReportViewer);
                      ";
  
              ScriptManager.RegisterStartupScript(Parent.Page, GetType(), Guid.NewGuid().ToString(), script, true);
  
              UpdatePanelReport.Update();
          }

• 

  uttkarsh.matiyal

  

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  Posted 31 March 2026, 3:08 am EST

  Hello Enrique,

  We’re glad that solution works for you.
  
  Please let us know if you observe any other issue.

  Regards,
  
  Uttkarsh.