CrystalDecisions.CrystalReports.Engine.ReportDocument doc;
            doc = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
            doc.Load("D:\\Temp_02\\Report1_Test.rpt");

            CrystalDecisions.Shared.ConnectionInfo connectionInfo;
            connectionInfo = (CrystalDecisions.Shared.ConnectionInfo)doc.Database.Tables[0].LogOnInfo.ConnectionInfo.Clone();
            connectionInfo.Password = "password";

            CrystalDecisions.Shared.ParameterValues ThisPV = new CrystalDecisions.Shared.ParameterValues();
            ThisPV.AddValue(3);
            doc.DataDefinition.ParameterFields[0].ApplyCurrentValues(ThisPV);
            try
            {
                doc.SetSQLCommandTable(connectionInfo, doc.Database.Tables[0].Name, "SELECT * FROM sys.all_objects WHERE schema_id = {?CR ParSchemaId}");
            }
            catch (Exception ex)
            {
                doc.Close();
            }

SELECT * FROM sys.all_objects WHERE schema_id = {?CR ParSchemaId}

SELECT TOP(3) * FROM sys.all_objects WHERE schema_id = {?CR ParSchemaId}

private void button_Test_Click(object sender, EventArgs e)
{
    ReportDocument doc = new ReportDocument();

    doc.Load("D:\\Temp_01\\Report1_Test.rpt");

    ISCDReportClientDocument rcd = doc.ReportClientDocument as ISCDReportClientDocument;

    CommandTable rcdTable_Old;

    CommandTable rcdTable_New;

    try
    {
        rcdTable_Old = rcd.Database.Tables[0] as CommandTable;

        rcdTable_New = rcd.Database.Tables[0].Clone(true) as CommandTable;

        rcdTable_New.CommandText = "SELECT TOP(1000) * FROM sys.all_objects WHERE name = {?CR ParSchemaId}";

        rcd.DatabaseController.LogonEx("ServerName", "DataBaseName", "UserId", "Password");

        rcd.VerifyDatabase();

        rcd.SaveAs(rcd.DisplayName, "D:\\Temp_02\\", 1);

        rcd.Close();
    }
    catch (Exception ex)
    {
        rcd.Close();

        MessageBox.Show(ex.Message);
    }
}