How to print or export select records immediately when using the built-in ShowInReport Action

Hello He,

I suggest you accomplish this task using a customized ShowInReport Action along with a modified approach shown at How to: Print a Report Without Displaying a Preview.
Consider the following implementation plan:

ASP.NET WebForms:

1. In the YourSolutionName.Module.Web project, create a custom ViewController and handle the DevExpress.ExpressApp.ReportsV2 > ReportServiceController > CustomShowPreview  event and take the WebPrintContactsController class code from the How to: Print a Report Without Displaying a Preview article as a base. There, you will need to additionally pass the Criteria parameter to the client-side script:

C#
using System;  
using DevExpress.ExpressApp;  
using DevExpress.ExpressApp.ReportsV2;  
using DevExpress.ExpressApp.Web;  

namespace MainDemo.Module.Web.Controllers {  
    public class T490052_Web : ViewController {  
        protected override void OnActivated() {  
            base.OnActivated();  
            Frame.GetController<ReportServiceController>().CustomShowPreview += OnCustomShowPreview;  
        }  
        private void OnCustomShowPreview(object sender, CustomShowPreviewEventArgs e) {  
            e.Handled = true;  
            string script = string.Format(@"  
        if(!ASPx.Browser.Edge) {{  
            var iframe = document.getElementById('reportout');  
            if (iframe != null) {{  
                document.body.removeChild(iframe);  
            }}  
            iframe = document.createElement('iframe');  
            iframe.setAttribute('id', 'reportout');  
            iframe.style.width = 0;  
            iframe.style.height = 0;  
            iframe.style.border = 0;  
            document.body.appendChild(iframe);  
            document.getElementById('reportout').contentWindow.location =  
'InstantPrintReport.aspx?reportContainerHandle={0}&selectedRecordsCriteriaForReport={1}';  
            }} else {{  
                window.open('InstantPrintReport.aspx?reportContainerHandle={0}&selectedRecordsCriteriaForReport={1}', '_blank');  
        }}  
        ", Uri.EscapeDataString(e.ReportContainerHandle), Uri.EscapeDataString(e.Criteria.ToString()));  
            ((WebWindow)WebApplication.Instance.MainWindow).RegisterStartupScript(  
            "InstantPrintReport", script, overwrite: true);  
        }  
    }  
}  

2. In the YourSolutionName.Web project, add the InstantPrintReport .aspx web form file and modify its code as follows:

C#
using System;  
using System.IO;  
using DevExpress.Data.Filtering;  
using DevExpress.ExpressApp.ReportsV2;  
using DevExpress.XtraPrinting;  
using DevExpress.XtraReports.UI;  

namespace MainDemo.Web {  
    public partial class InstantPrintReport : System.Web.UI.Page {  
        protected void Page_Load(object sender, EventArgs e) {  
            string reportDataHandle = Request.QueryString["reportContainerHandle"];  
            string criteria = Request.QueryString["selectedRecordsCriteriaForReport"];  
            ReportsModuleV2 module = ReportsModuleV2.FindReportsModule(  
                ApplicationReportObjectSpaceProvider.ContextApplication.Modules);  
            if(!String.IsNullOrEmpty(reportDataHandle) && module != null) {  
                XtraReport report = null;  
                try {  
                    report = ReportDataProvider.ReportsStorage.GetReportContainerByHandle(reportDataHandle).Report;  
                    module.ReportsDataSourceHelper.SetupBeforePrint(report, null, CriteriaOperator.Parse(criteria), true, null, false);  
                    using(MemoryStream ms = new MemoryStream()) {  
                        report.CreateDocument();  
                        PdfExportOptions options = new PdfExportOptions();  
                        options.ShowPrintDialogOnOpen = true;  
                        report.ExportToPdf(ms, options);  
                        ms.Seek(0, SeekOrigin.Begin);  
                        byte[] reportContent = ms.ToArray();  
                        Response.ContentType = "application/pdf";  
                        Response.Clear();  
                        Response.OutputStream.Write(reportContent, 0, reportContent.Length);  
                        Response.End();  
                    }  
                }  
                finally {  
                    if(report != null) report.Dispose();  
                }  
            }  
        }  
    }  
}  

Take special note that here we additionally read the Criteria parameter passed at the previous step and modified the SetupBeforePrint method call.

WinForms:
In the YourSolutionName.Module.Win project, create a custom ViewController and handle the DevExpress.ExpressApp.ReportsV2 > ReportServiceController > CustomShowPreview event and take the WinPrintContactsController class code from the How to: Print a Report Without Displaying a Preview article as a base. There, you will also need to modify the SetupBeforePrint method call to pass criteria from the CustomShowPreview event arguments:

C#
using DevExpress.ExpressApp;  
using DevExpress.ExpressApp.ReportsV2;  
using DevExpress.XtraReports.UI;  

namespace MainDemo.Module.Win.Controllers {  
    public class T490052_Win : ViewController {  
        protected override void OnActivated() {  
            base.OnActivated();  
            Frame.GetController<ReportServiceController>().CustomShowPreview += OnCustomShowPreview;  
        }  
        private void OnCustomShowPreview(object sender, CustomShowPreviewEventArgs e) {  
            e.Handled = true;  
            IReportContainer reportContainer = ReportDataProvider.ReportsStorage.GetReportContainerByHandle(e.ReportContainerHandle);  
            XtraReport report = reportContainer.Report;  
            ReportsModuleV2 reportsModule = ReportsModuleV2.FindReportsModule(Application.Modules);  
            if(reportsModule != null && reportsModule.ReportsDataSourceHelper != null) {  
                reportsModule.ReportsDataSourceHelper.SetupBeforePrint(report, null, e.Criteria, true, null, false);  
                report.PrintDialog();  
            }  
        }  
    }  
}