How to dynamically change crystal report database connection

Question

I am new with crystal reports. I tried to to implement the crystal report in my win form c# application using report wizard visual studio 2012, so don\'t know what happen\'s

Answer 1

Here's an example of changing all the main report tables as well as all subreports tables, to a newly specified TargetServer and TargetDatabase with Integrated Authentication:

using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;

// using CrystalDecisions.ReportAppServer.CommLayer; // not used directly, but this is needed in Project References.
//
// be sure to set "copy local" = true in the Project:
// see https://stackoverflow.com/questions/38025601/could-not-load-file-or-assembly-crystaldecisions-reportappserver-commlayer-ver


        static ReportDocument crReportDocument;
        static ConnectionInfo crConnectionInfo = new ConnectionInfo();
        static public string TargetServer { get; set; }
        static public string TargetDatabase { get; set; }

        static void crAssignConnectionInfo()
        {
            crConnectionInfo.UserID = "";
            crConnectionInfo.Password = "";
            crConnectionInfo.DatabaseName = TargetDatabase;
            crConnectionInfo.ServerName = TargetServer;
            crConnectionInfo.IntegratedSecurity = true; // in case the report was saved with SQL authentication, switch to Integrated
        }

        static void SetSubreportLoginInfo(CrystalDecisions.CrystalReports.Engine.Sections objSections)
        {
            foreach (Section section in objSections)
            {
                foreach (ReportObject reportObject in section.ReportObjects)
                {
                    SubreportObject crSubreportObject;
                    switch (reportObject.Kind)
                    {
                        case ReportObjectKind.SubreportObject:
                            crSubreportObject = (SubreportObject)reportObject;
                            ReportDocument subRepDoc = crSubreportObject.OpenSubreport(crSubreportObject.SubreportName);
                            if (subRepDoc.ReportDefinition.Sections.Count > 0) {
                                SetSubreportLoginInfo(subRepDoc.ReportDefinition.Sections);
                            }
                            Tables crTables = subRepDoc.Database.Tables;
                            foreach (Table table in crTables)
                            {
                                TableLogOnInfo tableLogOnInfo = new TableLogOnInfo();
                                tableLogOnInfo.ConnectionInfo.UserID = crConnectionInfo.UserID;
                                tableLogOnInfo.ConnectionInfo.Password = crConnectionInfo.Password;
                                tableLogOnInfo.ConnectionInfo.DatabaseName = crConnectionInfo.DatabaseName;
                                tableLogOnInfo.ConnectionInfo.ServerName = crConnectionInfo.ServerName;
                                tableLogOnInfo.ConnectionInfo.IntegratedSecurity = crConnectionInfo.IntegratedSecurity;

                                table.ApplyLogOnInfo(tableLogOnInfo);
                            }
                            break;
                        case ReportObjectKind.FieldObject:
                        case ReportObjectKind.TextObject:
                        case ReportObjectKind.LineObject:
                        case ReportObjectKind.BoxObject:
                        case ReportObjectKind.PictureObject:
                        case ReportObjectKind.ChartObject:
                        case ReportObjectKind.CrossTabObject:
                        case ReportObjectKind.BlobFieldObject:
                        case ReportObjectKind.MapObject:
                        case ReportObjectKind.OlapGridObject:
                        case ReportObjectKind.FieldHeadingObject:
                        case ReportObjectKind.FlashObject:
                        default:
                            // none of the other objects need to have login assigned
                            break;
                    }
                }
            }
        }

        static void SetCrystalDocumentLogon()
        {
            crAssignConnectionInfo();
            TableLogOnInfo crTableLogonInfo = new TableLogOnInfo();
            foreach (Table crTable in crReportDocument.Database.Tables)
            {
                try
                {
                    crConnectionInfo.Type = crTable.LogOnInfo.ConnectionInfo.Type;
                    crTableLogonInfo.ConnectionInfo = crConnectionInfo;
                    crTableLogonInfo.ReportName = crTable.LogOnInfo.ReportName;
                    crTableLogonInfo.TableName = crTable.LogOnInfo.TableName;

                    crTable.ApplyLogOnInfo(crTableLogonInfo);
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Error during SetCrystalDocumentLogon " + ex.Message);
                    throw;
                }
                SetSubreportLoginInfo(crReportDocument.ReportDefinition.Sections);
            }
        }