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Code for validating login textbox in

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That, and the full page submit you're doing, is why you only see your "JSON result" and not your grid page. If possible, attach a file containing these items and I'll be glad to take a look. Also, lowercase class file names violate Java naming conventions and the use of the 'default' package is discouraged. An easy one to start off understanding spring and its integration with extjs. Consider refactoring the 'register' Servlet class file to App.servlet. A Java Script check is useful because it stops the form from being submitted if there is a problem, saving lots of time for your readers.

A "standard" submit is the old-school, full-page redirect style of submitting, which appears to not be what you want. Instead of redirecting it goes in the failure part and prints the JSON returned by the 2nd servlet(which fetches grid data.). What want is on success the page to be redirected to the grid page and display the grid with content. Also marked your comments and made the changes regarding files.If the length of value.inputtx is 0 then it returns false otherwise true. Flowchart : In the above function background color of the input field will be yellow if the user input a blank field otherwise the background color will be white.Flowchart : Download the Validation code from here.Remove standard Submit: true from your Form panel configuration. Panel API documentation for a working, Ajax-style Form panel example. Allow me to first say that Servlets will kill you in the long-term; you seriously need to invest in the time and trouble of learning an MVC framework, where I suggest the Spring Web MVC framework. The second servlet: import *; import javax.servlet.*; import javax.*; import *; import *; import json. JSONObject; public class register extends Http Servlet I have no idea why/how your second grid data Servlet is being called by the failure block of your login code. A request though,you had pasted a link for the MVC Spring framework in previous comments.Having said that, your Servlet is not setting a content type prior to outputting your "JSON" string, so it's defaulting to text/html. I'd have to see your complete login page, grid page and source for both Servlets. Each Servet should be mapped separately, as shown below. Could you please send me an example with CRUD operations using it or point to some useful links for the same?? By validating form responses before accepting them, we can alert users to their errors before they submit the form.