Changing database location per Table at runtime is extremely slow in viewer

Question

We are using the Crystal Reports 2008sp2 Viewer in windows forms .NET
application to display various reports based on a Pervasive database.  The
C# code dynamically changes the database table locations at run time.  The
location needs to be set for each table since the location may be different
for each table in the report. 
We have tried to methods to change the location.
1) Set  the Table.Location property in the ReportDocument.Database.Tables
collection.
foreach (Table table in rd.Database.Tables)
Table.Location = "New Path";
2) Set the TableLogOnInfo properties.
      TableLogOnInfo logonInfo = new TableLogOnInfo();
      logonInfo = table.LogOnInfo;
      logonInfo.ConnectionInfo.ServerName = dataPath;
      logonInfo.ConnectionInfo.LogonProperties[0] = new NameValuePair2("Data
File", dataPath);
      logonInfo.ConnectionInfo.LogonProperties[0] = new NameValuePair2("Data
File Search Path", path);
      table.ApplyLogOnInfo(logonInfo);
Both of these methods work, but have extremely slow performance.  Both
methods take between 2 and 3 seconds to execute per table.  Since many of
our reports have 20 - 30 table references ( sometimes more ), this can add
an additional 1-2 minutes to the display of a report.
It seems that the Crystal viewer object is doing some sort of verification
every time the database location is changed.  We have noted that as the
location is changed, the database is being accessed by the viewer.  Please
advise as to how to stop this behavior.  Is there a way to set the location
without the viewer verifying the change?
This problem is turning reports that run in the 2008 Report Designer in 3 seconds into reports that take
many minutes to run.  We will hear nothing but screaming from our 300 customers.
Thanks for any help.
Bill Smith

Answer 1

Hello,
I have a very similar issue but with Crystal XI and XI R2.
I'm using Oracle 10g, and changing a couple of properties using the following sequence for each table to change the login information and the table's current view (each view is a portion of the overall table):
IDatabaseTablePtr table = tables->GetItem(tableN);          
table->SetLogOnInfo(TheApp.GetDataSource(), TheApp.GetDatabase(), userID, pwd);
char tableLocation[201];
char tempTable[201], newTable[201];
strcpy(tableLocation, table->GetLocation());
// make new table name, put into newTable
table->PutLocation(newTable);
if (!table->TestConnectivity())
  ShowCrystalRE_Error(job);
Stepping through in my debugger, the SetLogOnInfo seems very quick, it's the PutLocation( ) that seems to be taking alot of time.
Any help would be greatly appreciated.
This is extremely fast on SQL Server, only noticeably slow on Oracle.