Changing Connection String dynamically at runtime

Question

I am using the Crystal Report Viewer control in in a Visuall Studio 2008 C# project.  The reports are created inside of Visual Studio 2008, and will be running against an InterSystems Cache database.  I have to use an ODBC (RDO) connection and use a connection string.
I have seen many examples of how to update the connection string at runtime if it is SQL server (or some flavor thereof), but nothing for an ODBC (RDO) connection to a NON-MSSQL database.
The problem when I update the connection string for each of the tables in the report, the report will either not run and display a window -- tiled 'Datbase Login' -- that has the Server, Database, Username, and Password fields on the window, OR, it will run but not against the database that was specified at runtime (it uses the connection stored in the report).
Code Sample #1 (This is using the connection string, and will cause a the "Database Login" window to be displayed - the first scenario from above)
rd = new ReportDocument();
// Load the report
rd.Load(fileName, OpenReportMethod.OpenReportByDefault);
rd.Refresh();
// Create the connection object
ConnectionInfo connectionInfo = CreateConnection(Server, Port, ServerNamespace, Username, Password);
// Set the connection info on each table in the report
SetDBLogonForReport(connectionInfo, rd);
SetDBLogonForSubreports(connectionInfo, rd);
private static ConnectionInfo CreateConnection(string Server,
                                               int Port,
                                               string ServerNamespace,
                                               string Username,
                                               string Password)
        ConnectionInfo connectionInfo = new ConnectionInfo();
        string connString = "DRIVER=InterSystems ODBC;SERVER=" + Server
                                                  + ";PORT=" + Port
                                                  + ";DATABASE=" + ServerNamespace
                                                  + ";UID=" + Username
                                                  + ";PWD=" + Password;
        connectionInfo.IntegratedSecurity = false;
        connectionInfo.UserID = Username;
        connectionInfo.Password = Password;        //In examples that I have seen, this is the actual connection string, not just the server name
        connectionInfo.ServerName = connString;          connectionInfo.DatabaseName = ServerNamespace;
        connectionInfo.Type = ConnectionInfoType.CRQE;
        return connectionInfo;
private static void SetDBLogonForReport(ConnectionInfo connectionInfo, ReportDocument reportDocument)
        foreach (CrystalDecisions.CrystalReports.Engine.Table table in reportDocument.Database.Tables)
            TableLogOnInfo tableLogonInfo = table.LogOnInfo;
            tableLogonInfo.ConnectionInfo = connectionInfo;
            table.ApplyLogOnInfo(tableLogonInfo);
private static void SetDBLogonForSubreports(ConnectionInfo connectionInfo, ReportDocument reportDocument)
        foreach (Section section in reportDocument.ReportDefinition.Sections)
            foreach (ReportObject reportObject in section.ReportObjects)
                if (reportObject.Kind == ReportObjectKind.SubreportObject)
                    SubreportObject subreportObject = (SubreportObject)reportObject;
                    ReportDocument subReportDocument = subreportObject.OpenSubreport(subreportObject.SubreportName);
                    SetDBLogonForReport(connectionInfo, subReportDocument);
Sample #2 (the same as Sample #1 above, only the ConnectionInfo method is different - which is all that I included here)
private static ConnectionInfo CreateConnection(string Server,
                                                int Port,
                                               string ServerNamespace,
                                               string Username,
                                               string Password)
        ConnectionInfo connectionInfo = new ConnectionInfo();
        string connString = "DRIVER=InterSystems ODBC;SERVER=" + Server
                                                  + ";PORT=" + Port
                                                  + ";DATABASE=" + ServerNamespace
                                                  + ";UID=" + Username
                                                  + ";PWD=" + Password;
        connectionInfo.Attributes.Collection.Add(new NameValuePair2(
                          DbConnectionAttributes.CONNINFO_DATABASE_DLL, DbConnectionAttributes.DATABASE_DLL_CRDB_ODBC));
        connectionInfo.Attributes.Collection.Add(new NameValuePair2(
                          DbConnectionAttributes.QE_DATABASE_NAME, ServerNamespace));
        connectionInfo.Attributes.Collection.Add(new NameValuePair2(
                          "QE_DatabaseType", "ODBC (RDO)"));
        DbConnectionAttributes attributes = new DbConnectionAttributes();
        attributes.Collection.Add(new NameValuePair2(
                          DbConnectionAttributes.CONNINFO_CONNECTION_STRING, connString));
        attributes.Collection.Add(new NameValuePair2(
                          "Server", Server));
        attributes.Collection.Add(new NameValuePair2(
                          "UseDSNProperties", false));
        connectionInfo.Attributes.Collection.Add(new NameValuePair2
(                          DbConnectionAttributes.QE_LOGON_PROPERTIES, attributes));
        connectionInfo.Attributes.Collection.Add(new NameValuePair2(
                          DbConnectionAttributes.QE_SERVER_DESCRIPTION, Server));
        connectionInfo.Attributes.Collection.Add(new NameValuePair2(
                          "QE_SQLDB", true));
        connectionInfo.Attributes.Collection.Add(new NameValuePair2(
                          DbConnectionAttributes.CONNINFO_SSO_ENABLED, false));
        connectionInfo.IntegratedSecurity = false;
        connectionInfo.UserID = Username;
        connectionInfo.Password = Password;
        connectionInfo.ServerName = connString;
        connectionInfo.DatabaseName = ServerNamespace;
        connectionInfo.Type = ConnectionInfoType.CRQE;
        return connectionInfo;
I have also tried setting connectionInfo.ServerName equal to just the real server name, but that didn't work either.
After the above operations are performed, I simply assign the returned ReportDocument object to the Crystal Viewer control.  If I don't call the above functions, and just set the ReportDocument source (using whatever connection string was embedded in the report originally), the report runs as expected.  Only when I attempt to update the connection string, the report will not execute.  Please advise.  Thanks!

Answer 1

I am using the Crystal Report Viewer control in in a Visuall Studio 2008 C# project.  The reports are created inside of Visual Studio 2008, and will be running against an InterSystems Cache database.  I have to use an ODBC (RDO) connection and use a connection string.
I have seen many examples of how to update the connection string at runtime if it is SQL server (or some flavor thereof), but nothing for an ODBC (RDO) connection to a NON-MSSQL database.
The problem when I update the connection string for each of the tables in the report, the report will either not run and display a window -- titled 'Datbase Login' -- that has the Server, Database, Username, and Password fields on the window, OR, it will run but not against the database that was specified at runtime (it uses the connection stored in the report).
Code Sample #1 (This is using the connection string, and will cause a the "Database Login" window to be displayed - the first scenario from above) -- The code samples appear to be too long to post, so I will add them as seperate replies.
rd = new ReportDocument();
// Load the report
rd.Load(fileName, OpenReportMethod.OpenReportByDefault);
rd.Refresh();
// Create the connection object
ConnectionInfo connectionInfo = CreateConnection(Server, Port, ServerNamespace, Username, Password);
// Set the connection info on each table in the report
SetDBLogonForReport(connectionInfo, rd);
SetDBLogonForSubreports(connectionInfo, rd);
private static ConnectionInfo CreateConnection(string Server, int Port, string ServerNamespace, string Username, string Password)
        ConnectionInfo connectionInfo = new ConnectionInfo();
        string connString = "DRIVER=InterSystems ODBC;SERVER=" + Server + ";PORT=" + Port + ";DATABASE=" + ServerNamespace + ";UID=" + Username + ";PWD=" + Password;
        connectionInfo.IntegratedSecurity = false;
        connectionInfo.UserID = Username;
        connectionInfo.Password = Password;        //In examples that I have seen, this is the actual connection string, not just the server name
        connectionInfo.ServerName = connString;          connectionInfo.DatabaseName = ServerNamespace;
        connectionInfo.Type = ConnectionInfoType.CRQE;
        return connectionInfo;
// Code smple continued in the next reply