Server.Transfer function in JSP?

I am trying to find somthing similar to Server.Transfer (ASP) in JSP. I have a page that you select what type of problem you are having (on the computer) and it will send you to the coresponding page with the current form data.
Lon

See for example Redirect tag in Coldtags suite
http://www.servletsuite.com/jsp.htm
and you may use jsp:forward also. It is an analogue for
Transfer if you need to deal with created objects.

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Access session variable in Java Function in JSP

Hi Experts !!
I am developing an application using STRUTS MVC...
Very sorry if u have problem understanding my question, i ll try to improve... and sorry if i can't post codes here
Basic question is ....
I want to open a word document on pageLoad of JSP, the word document is not a single document, there is a form in which there is a "name" and "template" whenever user clicks on a button there is one action attached to it which creates a copy of that template in a different folder.. on the next page OnLoad i want to open that particular document. for that i have created a variable and also have set in the session, just want to access it in the below code.
I have a formbean in which i have a variable, the scope is session, that variable i have put it in session also. but i want to access that variable in a "java function" in JSP so that "onLoad" page that function should work.
JSP---
<script type="text/javascript">
function openDocument() {
var w = new ActiveXObject("Word.Application");
var docText;
var obj;
var a;
if (w != null) {
w.Visible = true;
obj = w.Documents.Open(I HAVE TO ACCESS THAT VARIABLE HERE);
</script>
FORMBEAN----
public class CreateSOWFormBean extends ActionForm {
private String workflowName;
private String comment;
private String sowTemplate;
private String sowFileCreated;
public String getSowFileCreated() {
return sowFileCreated;
public void setSowFileCreated(String sowFileCreated) {
this.sowFileCreated = sowFileCreated;
sowFileCreated is the variable that i have accessed in session and that value i have to pass in that function in JSP....
I am aware of something like
obj = w.Documents.Open(<%'sowFileCreated'%>);
but i m not sure how to write....
Plz help.....

If you're working under a framework like struts you should definitely be using JSTL tags rather than scriptlet code to access variables within the page. With JSTL code <% codes can be almost entirely avoided.
To transfer a value from a Servlet to a JSP don't use a session variable, use a request attribute. Session variables should only be used when values have to survive from one transaction to another.
You can write something like:
obj = w.Documents.open('<c:out value="${openURL}"/>');in the Javascript portion of your JSP.
Just beware of potential problems with quotes. The coresponding code in the Servlet would be like:
request.setAttribute("openURL", openUrl);

Same as PHP Functionality In JSP, HOw?

Hi,
I am a developer having experiance in PHP with Oracle, I recently have projects to develop in JSP, I want know does JSP also have the Variable in Variable functioanlity in as it's available in PHP?
In php I stored my variable name in a PHP variable as
$Asif='My Name is Asif';
$a='Asif';
Echo "Here we can get the result of variable Asif using variable a: ".$$a;
in the above by using $$ it understand the inside value is the actual variable name whose value is to print..
I need same functionality in JSP.....
if Any one can help...
THanks in Advance.
Asif

The same rule applies for textboxes as for checkboxes with the same name - indeed for any components accessed in the dom via javascript.
If there is only one element of that name, it is accessed directly.
If there is more than one element of that name, it reveals them as an array.
so document.testForm.a_date would return an array of input fiels
document.testForm.a_date[0], document.testForm.a_date[1] ... document.testForm.a_date[n]
However the order of submission of parameters is NOT guarunteed, which is why people normally DON'T have fields in this manner - because you can't know for certain that a_date[1] matches with b_date[1] at the server end.
The common practice is to give each field a unique name (numbered).

Server side function not get called after dispatching cairngorm event second time on same page

Hi All,
I am facing a urgent issue regarding cairngorm event. Actually my page contain 3 button add,delete,save
and clicking of any button I do the respected functionality. For ex:
I click the add button & on clicking of add button I fire a cairngorm evnt & after getting response from server side that the record is added
I displayed a message that the record is added & update the data source.
After addition of the record , with out going to other page if I perform the same functionaly(Like adding another record) on same page the cairngorm
event not call the server side function - after debugging I find out that cairngorm event reach to the corresponding excutecommand function & called that function but it is not calling my server side function & I also din't get any error message .
I dont know why the server side function not get called?. similarly if I try for delete or update case the same things happend. Only for the first time it works properly but not for the second time.
Could any of you please tell me why the cairngorm event not calling the server side function.
Thank you for your kind assistance.
Regards,
Ujjwal

Okay, well I think I've worked out the problem.
In ASP.NET we would typically bind repeating controls such as DataLists and Repeaters manually using <i>Control</i>.DataBind(), because we're usually using a separate class library containing collections for our objects. Seems the SAP Table control doesn't like this approach.
I changed the code so that the databinding is specified on the control, and call the Page's DataBind() method and it all worked fine.
One tip: because the collection I used to bind to is in a separate class library, I receieved a <i>BC306523: Reference required to assembly MyAssemblyName...</i> message, even though I had a reference to the assembly in my project and the DLL is being properly deployed. To fix this, you must include the following directive at the top of the component's ASCX file:
<%@ Assembly Name="AssemblyName" %>

How can i connect to a SQL Server 2000 database usgin JSP?

I need (URGENT) to connect to SQL Server 2000 databse using JSP. I do not know how to program using JSP, so if anyone has any code snippet please let me see it. What i need is to give my site some login/password security.
Anyone?
Thx.

just create an ODBC of your database from control pannel -> administrative tools -> data sources (ODBC) ,double click it .....
go to the tab SYstem DSN , click on ADD button. select the driver for your connection. it will be the last one in the list "SQL Server".
click Next then give ur DSN name there, description and Server Name , on next give your username and password of SQL server. when it will be connected to the server celect your database from there and hence there will be an ODBC bridge same as in case of MS Access.
code for connecting to ODBC is
// DSN-NAME same as in System DSN.
// username and password are of your databse
try
          url = "jdbc:odbc:DSN-NAME";
          Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
          connect = DriverManager.getConnection( url,"username","password" );
          catch ( ClassNotFoundException cnfex ) {
                    setErrorMsg( cnfex.getMessage() );
          catch ( SQLException sqlex ) {
                    setErrorMsg( sqlex.getMessage() );
          catch ( Exception ex ) {
                    setErrorMsg( ex.getMessage() );
Now you are connected to the SQL Server ..... use connect object for further processing .........

File Receiver Adapter: Server to Server transfer (FXP) Blocked

Hi XIs
I have a scenario RFC -> XI -> FILE (ftp)! It works on DEV and QA environments! On PRD it does not work:
Error occurred while connecting to the FTP server "ftp:21": java.lang.IllegalStateException: Error during STOR/APPE epilogue: com.sap.aii.adapter.file.ftp.FTPEx: 425 Connection to foriegn address blocked. Server to Server transfer (FXP) Blocked [REF: 0BFA456B50B3]
First I thougt my firewall was blocking something! But from prompt I can do ftp.

Hi
We are getting the same error...any other way to solve this?
thanks

How to implement the Transfer Function in Real Time VIs?

Hi all,
I'm relatively new to Labview Real Time modoule and want to implement one Controller(not PID one) in Deterministic Loop! I have already designed discrete Transfer Function and searching for the way to build one Controller with it! Is it right to use the Simulation Loop instead of Timed Loop (in this case Deterministic loop) and implement the controller in it?! If it's correct so, should I use the same clock and Priod as Timed Loop?!
It would be very helpful, if there is an Example about using transfer function in Real Time Loops!
thanks for your help,
Mohsen

Hello mhmdi,
Sorry I can't open your VI (looks like it is a new version of LV than I have installed).
You're right - you don't need to convert to a difference equation if you have the CD&SIM Module which can take discrete time transfer functions directly. You don't need shift registers with this function, as it is effectively done internally. If you don't have CD&SIM discrete TF's can be implemented easily just in a timed (or while) loop with feedback nodes or shift registers to replicate each z-1 you need.
Some more ideas:
There are many configuration parameters and options with the Discrete TF VI - which you need to understand for your application and make sure are correct. Sometimes implementing in a basic form (timed loop and shift registers) allows you to see what is happening without any confusing options you might not need.
Are you using the Discrete TF VI in a Simulation Loop ? You might need to think if the loop being used is appropriate for a Real Time application. Maybe the timing of the TF, the loop and the DAQmx data are not all suitable for each other.
I'm not familar with DAQmx, so not sure about any specific real-time aspetcs of that.
"if the sample frequency of the discrete transfer function in the timed-loop is at multiple integers of the sampling rate (e.g. 12000 Hz for tranfer function and 4000 Hz for sampling rate, 12000=3*4000), would it somehow improve the resolution of the controller command?"
This could actually make things worse - but depends on your transfer function if it is a problem. Think about it this way - in the scenario you state the input signal going into the Discrete TF will only change once in every three samples, that means if your transfer function includes a 1-z^(-1) factor (i.e. a derivative) - that will be zero for two samples then jump up for the next sample. You'll observe a very jittery/noisy signal, but the noise is due to samples not being correct. This will also occur if the sample times are very similar but go in and out of sync where you may get the occassional sample that is the same and hence the occassional zero in the TF.
In an application I had we had problems trying to get the data coming into a timed loop and the timed loop itself synchronise, and before it was fixed the control signal was very jittery.
Consultant Control Engineer
www-isc-ltd.com

How to use Fuzzy Logic Controller for transfer function in labview control and simulation loop?

I am facing problem with fuzzy PD logic controller for transfer function in control and simulation loop.
Plz Help me in this regard...................
i have attache snapshot of my program
Attachments:
fuzzy in simulation loop.JPG ‏52 KB

Hi Sankhadip,
Sorry for the late response. I was looking at your code and
I noticed that the graph scale does not start from zero. That might be the
reason why you don't see the transient in the simulation. To change the scales
simply double click on the lower limit and set it to zero. If this is not the
expected results, can you please post the expected results, so we can see what are the
differences between the results . Also, you might be using different
solvers, and that gives different results as well.
Thanks and have a great day.
Esmail Hamdan | Applications Engineering | National
Instruments

Transfer functions imported from Simulink through MIT not working in Labview

Hi,
I am just starting to use Labview interface with Simulink using Model Interface Toolkit (MIT). I am trying to import an integrater model from simulink. The model is very simple. An input port connected to an output port through an integrator model (1/s). Here are the steps I used:
1. Build the model in Simulink.
2. Add the NI input-output ports to the model and place the NIVeriStandSignal Probe in the model.
3. Generate the dll using NiVeriStand.tlc as the target file option.
4. Import that dll into Labview using Load Model.vi. Follow the steps given in the example file for importing the input/ output ports info along with the timing info.
5. Then use a numeric control to input value to the integrator dll and pass the output from dll to a waveform chart.
But when I run the labview VI, the output in the chart is always zero. What could be the possible reason? Please let me know if I am making any mistake in the process?
I have used Fixed time step with ode4 (Runge-Kutta) as the solver options in Simulink during dll generation. I am using Labview 2014 and Matlab R2014a.
I have found the issue to occur only when I use any transfer functions or Plecs circuit with inductors or capacitors in my Simulink model. But when I use simulink model with only constant or maths functions like add, subtract etc, this process works and gives me the correct result in Labview.
Any help would be appreciated.
Thanks.

Hello Sachin_Madhu,
Can you build example programs with a solver included? Does the model work in The MathWorks, Inc. Simulink® Software without tying into LabVIEW? It is important that when you built the model you followed the four steps listed in this help file:
http://zone.ni.com/reference/en-XX/help/374160A-01/vsmithelp/mit_convert_model_to_dll/
MATLAB®, Simulink®, and Real-Time Workshop® are registered trademarks of The MathWorks, Inc. Other product and company names listed are trademarks and trade names of their respective companies.
Siana A.
Application Engineering
National Instruments

How to create a filter using mathscript transfer function in labview

Dear all,
I am currently designing a filter in labview using a Mathscript looping. The filter can be represented in transfer function. I have attachted the transfer function equation together with its value and the desire frequency vs. amplitude graph that I should obtained from it. Also, following are the transfer function written in Matlab.
B1= tf ([57.5221845],[1 51.017077 205.1868]);
B2 = tf ([1 0],[7.6991]);
B3 = tf ([1 0],[14.32433403]);
B4 = tf ([1 0],[137.6017]);
F = B1 * ( (1+B3)/((1+B2)*(1+B4)));
plot(F)
I have also modify the coding as Labview Mathscript does not support the Matlab coding "tf" as transfer function to "bilinear"
Problem I am facing are:
1) Unable to display the graph of the filter in labvie.
2) Unable to have sinewave as an input to the filter.
3) The output cannot be display in graph format.
Hope to have the soonest reply from you guys. Many thanks in advance
Solved!
Go to Solution.
Attachments:
transfer function.jpg ‏18 KB
Weighting Filter.vi ‏266 KB

Thank you again for offering to help me in writing the code.
I suppose that I should do a frequency sweep on the transfer
function to prove that it behave as the sample graph. Example, if I have an input sine
wave with the frequency of 8.8Hz passing through the transfer function filter, the
output that I should be getting is 1 according to the transfer function graph
and of cause the frequency range of my input sine wave would only be between
the ranges of 0.5 Hz to 30 Hz.
Attachments:
Weighting FilterTest1.vi ‏53 KB

Where in migration process does old server stop functioning as primary server?

I am migrating from a SBS 2003 box to a new WS 2012 R2 Essentials box - following the instructions from
"Migrate from Previous Versions to Windows Server 2012 R2 Essentials or Windows Server Essentials Experience". What I need to know is where in the process does
the old server stop functioning as a server for my network. What I mean by this is when in the migration process (when I add the new server as a replicate DC? not until I demote the old server?) will any programs/databases on the old server no
longer be available to client computers?
Thanks for any insight.

Yeah, we need to agree on what is meant by "the server". In Windows, Server means many different things. Each time you move, a role or feature from the "old" to the "new" the old server ceases to function as "the server"
for that role or feature. The basic functions of a Windows DC include Active Directory, 5 FSMO roles, file and print services, and application services to name just a few.
So the answer to your question is more to do with what you mean by "server". In particular, for the application role, you must move the app to the new server by whatever means the developer recommends. At that point, regardless of whatever
else is going on the old server is out of the picture for that application.
Larry Struckmeyer[MVP] If your question is answered please mark the response as the answer so that others can benefit.

How to call java script function from JSP ?

how to call java script function from JSP ?

i have function created by java script lets say x and i want to call this function from jsp scriplet tag which is at the same page ..thanks

Transfer Function Block Component not working properly

When using a Transfer Function Block, and you enter in the polynomial coefficients for a simple RC Passive Low-Pass Circuit, and perform an AC analysis side-by-side to its circuit equivalent, it works great. The 2 frequency response waveforms are identical. However, when you add another RC Low-Pass section in cascade with the 1st one, making it a 2-pole RC Passive Low-Pass Circuit, and you put its polynomial coefficients into the transfer function block the results of the AC Frequency Response is not identical to its 2-pole circuit equivalent. I double checked my math to make sure my transfer function math was correct. Since 2 transfer functions are in cascade, the transfer function from the 1st RC stage is multiplied times the transfer function of the 2nd RC stage, and the result is the overall transfer function. I even went as far as creating 2 transfer function blocks, each of them, with a single RC transfer function and connecting them in a cascade fashion. The results were the same....the trasnfer function block(s) do not resemble their circuit equivalent models for a >=2pole Passive RC Low-Pass filter.

The transfer function of a RC ist not retroactively-free, this is the reason why the transfer function of 2 RC Circuits is not 1 / (1 + RC*s)^2 ! You can not multiply the one function of one RC with the other!
You have to solve the differential equation of the RC circuits, to get the real transfer function.

The transfer function of the PID block doesn't show the derivator.

Hello,
I am trying to use the PID vi, but I when I try the box by itself, it doesn't behave as a "clasic" PID should behave. The main problem is that I don't manage to see the derivator. In the attached vi I compare the transfer function of the PID vi with the transfer function of a PID built by me. My version shows all what a PID should have: integral section (with decreasing magnitude and -90 phase), center area (with constant magnitude and 0 phase), and derivative area (with increasing magnitude and +90 phase).
The PID vi only shows the integral part.
You can also select a step input, and see the output directly. If you choose a large enough derivative time (100 times bigger than the integrator time), and you look closely to the first part of the output, you will see the pick due to the derivator in my version, but not in the PID.vi version.
Does anyone knows what am I doing wrong?
Kind regards,
Pablo Estevez
Solved!
Go to Solution.
Attachments:
TestPID.vi ‏31 KB

Dear Nathand,
Thanks for your answer, I tried the change and you are right. That shows that this not a standard PID, since that means (and actually I can see it now by checking inside the vi) that it is not using the derivative of the error but the derivative of the process variable. I know that this is used sometimes to prevent the effect of fast changing set-points, but it is a shame that they do not comment on it in the help, and that this is not a selectable feature. Do you know if there is a way to edit these pre-packaged vi's?
One more question, about the labview style. I included the sequences just to group terms and make the code more readable to separate the integrator from the derivator and not have a knot of entangled signals. Specially when I run the clean-up diagram, it gets very entangled. I have been looking for another way to do that (container boxes, groups). It would be nice if you could suggest me something I can do for it.
Thanks again,
Pablo

How to realize print function in JSP

How to realize print function in JSP? I know use Javascript:window.print() can print,but it will print whole page,it don't fit me;Another method is to write JSP into Excel and then print it in Excel,but it don't fit me too,because it don't print directly. Anybody know how to print it directly?

Many websites offer a "printer friendly" version of a certain page. That IMO is the only way to solve your problem, next to using CSS to use a different style for printer output. Here is a tutorial that covers this:
http://www.alistapart.com/stories/goingtoprint/

Server.Transfer function in JSP?

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