Crystal Reports - Switch between multiple databases at runtime (esp. DB2)
Hi,
we are currently developing a reporting application in .NET (C#) with an integrated Crystal Viewer. We want to be able to change the databse dynamically at runtime, especially between different DBMS.
We encountered no problems when switching between a SQL Server and an Oracle DB, but we ran into big trouble if trying to connect to a DB2 db.
In the report itself we have a SQL Server connection defined that is used during the design phase.
In our application we change the connection at runtime using the following code:
CrystalReportViewer viewer = new CrystalReportViewer();
ReportDocument document = new ReportDocument();
document.Load("<<path>>");
Tables tables = document.Database.Tables;
foreach (Table t in tables)
ConnectionInfo info = new ConnectionInfo();
info.UserID = "<UserId>";
info.Password = "<Password>";
info.ServerName = "<DSN of DB2 DB>";
info.DatabaseName = "<DB2 DB Alias>";
TableLogOnInfo tableInfo = t.LogOnInfo;
tableInfo.ConnectionInfo = info;
t.ApplyLogOnInfo(tableInfo);
// ... Setting parameter values ...
viewer.ReportSource = document;
We also tried to add the following lines of code after the "ApplyLogOnInfo" call without any success:
t.LogOnInfo.ConnectionInfo.UserID = "<UserId>";
t.LogOnInfo.ConnectionInfo.Password = "<Password>";
t.LogOnInfo.ConnectionInfo.ServerName = "<DSN of DB2 DB>";
t.LogOnInfo.ConnectionInfo.DatabaseName = "<DB2 DB Alias>";
Especially we are wondering because we don't get any error message. The Crystal Viewer just opens and shows an empty report without any data records. The TestConnectivity method called on each table (we are only using one table at the moment) also returns true.
Furthermore it seems that whenever we call ApplyLogOnInfo, the UserID, password, server name and database name is resetted to the values defined in the data connection within the report (SQL Server, used in the desing phase as mentioned above).
Any ideas, what we are doing wrong?
Kind regards,
Markus
Edited by: X-Giesi-X on Feb 10, 2010 4:53 PM
Hi Markus
OK. Make sure you have the latest updates. First apply SP 2:
https://smpdl.sap-ag.de/~sapidp/012002523100009038092009E/cr2008win_sp2.exe
Than FP 2.4:
https://smpdl.sap-ag.de/~sapidp/012002523100001024152010E/cr2008_fp24.zip
Next, open the report in the CR designer and enable the "Verify on first refresh" option (File | report Options)
If that does not help, export the report to rpt file format and try to view the exported report in the CR designer. What do you see?
Ludek
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right upto the linking is good?
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