postback

I am having the below managed bean. But every time I do a post back to the same bean ie while calling updateFileList. I get a new instance of FileDAO. How can I prevent this? Is it safe to have a DAO inside a managed bean, if not what changes can I make to better it. @ManagedBean(name = "file") @ViewScoped public class FileController implements Serializable { private static final long serialVersionUID = 1L; private List<LoadFileLog> fileList = null; private Date selectedDate; FileDAO fileDAO; public FileController() { System.out.println(" In file Controller constructor"); ServletContext

I have an ASP.NET 4.0 web form. There is a textbox I want users to submit and check. If it's correct, I blank out the textbox and don't want users to be able to resubmit that data. In IE8, users can hit back (get a resubmit warning) and if they refresh, it will resubmit the data from that text box. I've tried setting the value to null and disabling viewstate for the textbox. How do I stop resubmit? You can implement the Post Redirect Get pattern as detailed here on Wikipedia to remove the refresh and double postback. If it's absolutely vital that submissions never get processed twice, combine

I have a page called Bookprogram which contains 6 input controls namely, txtName, txtEmail, txtPhone, selectcat[dropdown for categories], txtDate, txtMessage. Now when am done with all the validations for the above control, I want to store the data in db. I know how to perform both in ajax as well as complete page posting. If it's in ajax, after validations, I would just call $.ajax and post the data as a string and fetch it in controller as below: [HttpPost] public JsonResult BookProgram(string name, string email, string phone, string category, string date, string message) { //code to save

Let's assume I have a very simple form, with a submit button and a dropdown list. When I change the list entry and hit submit, at what stage in the postback processing does the viewstate reflect my changed list entry? According to O'Reilly's Learning ASP.Net 3.5, there are two loads taking place-- one before form validation and another after (diagram on page 266 for those with a copy). According to the diagram the viewstate is loaded during the first load stage, before the validation. I assume my changed dropdown is reflected at this point? Also, according to the diagram, posted data is

I have setup a DataGrid with a number of columns and a checkbox and column at the end of the row. I am also changing the layout of the datagrid on the OnItemCreated event which changes the layout of the datagrid by expanding the rows with the "Rowspan" attribute and remove the extra columns and controls where they are no longer required. The original datagrid layout was setup like this: ___________________________________________ | 1 | Employee Name | 01/08/10 |[] |[SAVE]| | 1 | Employee Name | 02/08/10 |[] |[SAVE]| ___________________________________________ | 2 | Employee Name | 01/08/10 |[]