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• Barcode reading method?

  - by Atlas

  I recently acquired a Metrologic Barcode scanner (USB port), as everyone already knows it works as a keyboard emulator out of the box. Now my question, how do I configure the scanner and my application, so that my app can process the barcode data directly. That is, I don't want the user to focus on a "Text field" and then process the data when the KeyPress event fires.

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• Data validation in cell of datagridview control

  - by Yogi

  I am using datagridview control and in this grid user can edit the value of a fixed column. i want user only can write numaric values (e.g. 1, 2, 443 etc) I am not sure at which event of datagridview i have to write this code and what is the code to trap values

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• How to manually set button input type in ASP.NET?

  - by jawonlee

  I have a jQueryUI dialog with some textboxes, plus a button. Right now, the asp:Button tag used to generate the button automatically sets its type as type="submit". The structure of the dialog is such that pressing enter at any of the textboxes should not call the button click event. It seems like the cleanest way to solve the problem, if it is doable, is to manually set the button's type to something other than submit. Is there a way to do this?

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• Create list<string> dynamically

  - by shiv09

  Hello, friends... I want to create a list in a button click event...every time the button is clicked a new list should be created having different name than the previous one... Can anyone please help me out...I'm stuck on it...

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• Page.Request behaviour

  - by StupidDeveloper

  I have a page and few controls. I'm doing a normal postback. On InitializeCulture event of the page the Page.Request object contains e.g. controls with their values - and that's great. But on the other hand, when I'm trying to access this collection on the Page_Load or OnInit events, it's way smaller and doesn't have any of the controls that have been there before. Can anyone tell me what happens with Page.Request between these events?

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• VisualSvn Server

  - by John

  Hi all, When I am trying to setup VisualSVN Server in my server. I get error. I can not find solution Error: service VisualSVN Server failed to start. Please check VisualSVN Server log in Event Viewer for more details. Thanks for help.

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• How to display an image(all major formats), selected by JFileChooser in java

  - by Tushar Maroo

  I am developing an image editing app, so want to display an image selected by JFileChooser, so what would be best approach so that it can display all formats jpg, png, gif etc. OpenButton is used for invocation of filechooser. private void OpenActionPerformed(java.awt.event.ActionEvent evt) { int returnVal = fileChosser.showOpenDialog(this); if (returnVal == JFileChooser.APPROVE_OPTION) { File file = fileChosser.getSelectedFile(); // What to do with the file // I want code for this part try { //code that might create an exception } catch (Exception e1) { e.printStackTrace(); } } }

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• How to get a textbox to only display Uppercase letters?

  - by Ritu

  Using Windows Mobile 6.5 and C# The CharacterCasing property seems to be missing from WinMo 6.5 and I decide to just catch the textchanged event and set the text with ToUpper. This works - but on every keypress, it sends the cursor back to the beginning of the string, not the end.

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• iPhone keeps going into dim/sleep mode even with the proper API calls.

  - by Kyle

  I call: [[ UIApplication sharedApplication ] setIdleTimerDisabled: YES ] on the applicationDidFinishLaunching event.. I set a breakpoint on it, which fires so I know it's getting called.. I've also called this function in other places as well.. Basically, a 3G iPhone will still go into sleep mode, but my 3GS won't. Has anyone seen this behavior before? Both are running the latest OS versions. Thanks for reading!

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• Gridview footer data format string

  - by Germ

  Is there a way to format a gridview column footer value as currency. I'v set the DataFormatString of the BoundField to {0:c} but this doesn't seem to affect the footer. Do I have to do it in the RowDataBound event?

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• Java Flow Control Problem

  - by Kyle_Solo

  I am programming a simple 2d game engine. I've decided how I'd like the engine to function: it will be composed of objects containing "events" that my main game loop will trigger when appropriate. A little more about the structure: Every GameObject has an updateEvent method. objectList is a list of all the objects that will receive update events. Only objects on this list have their updateEvent method called by the game loop. I’m trying to implement this method in the GameObject class (This specification is what I’d like the method to achieve): /** * This method removes a GameObject from objectList. The GameObject * should immediately stop executing code, that is, absolutely no more * code inside update events will be executed for the removed game object. * If necessary, control should transfer to the game loop. * @param go The GameObject to be removed */ public void remove(GameObject go) So if an object tries to remove itself inside of an update event, control should transfer back to the game engine: public void updateEvent() { //object's update event remove(this); System.out.println("Should never reach here!"); } Here’s what I have so far. It works, but the more I read about using exceptions for flow control the less I like it, so I want to see if there are alternatives. Remove Method public void remove(GameObject go) { //add to removedList //flag as removed //throw an exception if removing self from inside an updateEvent } Game Loop for(GameObject go : objectList) { try { if (!go.removed) { go.updateEvent(); } else { //object is scheduled to be removed, do nothing } } catch(ObjectRemovedException e) { //control has been transferred back to the game loop //no need to do anything here } } // now remove the objects that are in removedList from objectList 2 questions: Am I correct in assuming that the only way to implement the stop-right-away part of the remove method as described above is by throwing a custom exception and catching it in the game loop? (I know, using exceptions for flow control is like goto, which is bad. I just can’t think of another way to do what I want!) For the removal from the list itself, it is possible for one object to remove one that is farther down on the list. Currently I’m checking a removed flag before executing any code, and at the end of each pass removing the objects to avoid concurrent modification. Is there a better, preferably instant/non-polling way to do this?

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• How to detect ctrl-t keypress in Delphi

  - by Kent Comeaux

  I have a Win32 form with a TEdit control. When the user presses CTRL-t while the TEdit control is in focus, I want to detect it using the OnKeyUp event. I need a code example, please, using the Key and/or Shift variables. Thanks.

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• start session on page_load in vb.net

  - by gtere

  i have 1 master page with 5 pages that call it. now on the master page, I have few dropdowns and textboxes, and the calling pages only have a small article in the corner. I want to start a session on page_load event, so that if the user chooses to select a dropdown or put data in textbox, even if he clicks on the other 4 links of other pages, the data should stay. how can this be done?

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• UIView capturing all events

  - by Josh P.

  I have a UIView that uses several UIGestureRecognizers and this view again has at least one child view that contains a MPMoviePlayerController. When a touch event occurs over the movie player, the main view seems to 'eat' all the events, leaving the media player idle. How can I make sure that the events are delivered correctly to the player?

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• Is there a way to be notified when a property changes in a QObject?

  - by darkadept

  First off, I'm using Qt 4. Is there a way to be notified (signal, event, ?) when a property (dynamic or otherwise) changes on a QObject?

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• Gridview - Edit Mode - When I press return on my keyboard, the edit item index changes to the first

  - by hamlin11

  When I am in edit mode on any row of my GridView and I press Return while the focus is in one of the row's textboxes, instead of triggering the update button, my GridView1.RowEditing event is fired with a NewEditIndex of 0 This causes the first row to become editable and I lose any values typed into the previous row. How can I stop this from happening? Thanks

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• problem in listbox value and mysql database in vb.net

  - by testkhan

  i have a problem in inserting the listbox value into mysql database in vb 2008 i.e if i select a video file i.e D:\videos\video1.mpg and add a msgbox() event before inserting into data base it shows the exact path i.e D:\videos\video1.mpg but when i check my database it shows me as D:videosvideo1.mpg how can i solve that

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• Build a custom drawn control for .net compact framework

  - by Hinek

  I just started on the .net compact framework. I want to draw a Sudoku field on the screen. So I put down a PictureBox and defined a method for the Paint event: private void pictureBoxPlayfield_Paint(object sender, PaintEventArgs e) { // use e.Graphics to draw the grid, numbers and cursor } This works, but you can see as the grid is drawn. So my question is, what is the right/better way to create such a custom control? Is there maybe a way to enable double buffering?

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• Record/playback keystrokes in textfield using Javascript

  - by James

  Is it possible to record a user's input into an HTML textfield, and playback at a later date in realtime? One way I can think of would be to capture each keyDown event and the time delta (accurate to a few hundred ms), and store the pairs together. Can you think of a better/more efficient way?

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• Get the label of click check box

  - by CliffC

  hi i have a page which generate check boxes dynamically and i have the following event which fires every time a user click on any of the check boxes $(':checkbox').click(function() { }); My question is how can i get the text of the check box that has been trigger by the user? Thank you

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• How to keep a floating div centered on window resize

  - by Jimbo

  Is there a way (without binding to the window.resize event) to force a floating DIV to re-center itself when the browser window is resized? To help explain, I imagine the pseudocode would look something like: div.left = 50% - (div.width / 2) div.top = 50% - (div.height / 2)

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• Winforms - why does a "Show()" after a system tray double click end up in my app minimized?

  - by Greg

  Hi Winforms - why does a "Show()" after a system tray double click end up in my app minimized? How do I ensure Inthe notifyicon double click event that my hidden main form comes back visible as normal, not minimized (nor maximised for that matter too)

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• A beginner's log4J question

  - by Nitesh Panchal

  Hello, i configured log4j for basic purpose usin the conversion pattern :- log4j.appender.rollingFile.layout.ConversionPattern=%p %t %c - %m%n But now i want to log the class name from which the error came as well as the username(available in session object) as well as the date and time when that event occurs. How do i do this? What changes do i need to make in format string? Thanks in advance :)

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• Application crashes while using the scroll bars in winForm Datagrid view

  - by subbu

  Hi all i have a background worker thread and some unmanaged code dlls , In progress changed event of background worker . I will get the data from my database in a datatable and make this table as my DataSource. But when i use the scrollbards od DataGridView my application crashes.when I try to debug the application it gives "Unhandled exception in TestExe.exe : 0xC0000096: Privileged Instruction.

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• Add handler multiple times in jquery

  - by AdmSteck

  How does jquery handle event assignment when it comes to assigning the same handler multiple times? Let's say I have <div class="draggable">Some Text</div> Are there any side effects (performance or otherwise) from calling the following multiple times? $('.draggable').draggable();

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