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  • Can I make DataGridView.EndEdit trigger the CellValidating event?

    - by Don Kirkby
    I'm using a DataGridView in my WinForms application. My main objective is to make the Enter key not move to the next row in the grid. I still want the enter key to validate and end edit mode. I found this FAQ entry and subclassed DataGridView to override ProcessDialogKey(). If the key pressed is Enter, I call EndEdit(), otherwise I call base.ProcessDialogKey(). It works great, except the CellValidating event isn't fired. Currently, I'm just manually calling my validation logic before I call EndEdit, but it seems like I'm missing something. I guess I could call OnCellValidating, but then I'd be worried I'm missing some other event. What I really want is some flavour of EndEdit() that behaves just like pressing enter on the last row of a grid with adding disabled.

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  • Can I fire a Text Changed Event for an asp.net Text Box before it loses focus?

    - by Xaisoft
    I have an asp.net TextBox in which I want to check if the text entered into the TextBox is > 0. It works once I tab out or click out of the TextBox, but if I keep focus on the TextBox, it won't fire the Text Changed Event, so I have the following scenario, I want to enable something if and only if the TextBox.Text.Length = 0. Now, if I put my caret in the TextBox and delete all the characters and then leave the caret in the TextBox so it still has focus and take my mouse and click a button, it will not do what it was supposed to do because it never fired the Text Changed Event. How would something like this be handled?

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  • I'm working on a website that sells different artwork, what's the best way to handle different image

    - by ThinkingInBits
    I'm working on a website that will allow users to upload and sell their artwork in different sizes. I was wondering what the best way would be to handle the different file sizes automatically. A few points I was curious on: How to define different size categories (small, medium, large) in such a way that I'll be able to dynamically re-size images with proportional dimensions. Should I store actual jpegs of the different sizes for download? Or would it be easier to generate these different sizes for download on the fly My thumbnails will be somewhat larger than your average thumbnails, should I store a second 'thumbnail image' with the sites watermark overlaying it? Or once again, generate this on the fly? All opinions, advice are greatly appreciated!

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  • The Elegant way to handle Cyclic Event in Java ??

    - by dex
    Hi fellows, i think this not a specific problem to me; everybody might have encountered this issue before. To properly illustrate it, here's a simple UI: As you can see, those two spinners are controlling a single variable -- "A". The only difference is that they control it using different views. If i change the top spinner, "A" will be changed and the bottom spinner's value will also be updated accordingly. However, updating the bottom spinner's call (such as setValue) will also trigger another event instructing the top spinner to update based on the bottom spinner's value. Thus creates a bad cycle which can eventually cause a StackOverFlow exception. My previously solution is kinda cumbersome: i placed a guarding boolean to indicate whether the 2nd updating call should be performed. Now i'd like to ask "how can i handle such situation elegantly?" thx

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  • How to pass special characters so ASP.NET MVC can handle correctly query string data?

    - by labilbe
    Hello, I am using a route like this one: routes.MapRoute("Invoice-New-NewCustomer", "Invoice/New/Customer/New/{*name}", new { controller = "Customer", action = "NewInvoice" }, new { name = @"[^\.]*" }); There is an action which handles this route: public ActionResult NewInvoice(string name) { AddClientSideValidation(); CustomerViewData viewData = GetNewViewData(); viewData.InvoiceId = "0"; viewData.Customer.Name = name; return View("New", viewData); } When I call return RedirectToAction("NewInvoice", "Customer", new {name}); and name is equal to "The C# Guy", the "name" parameter is truncated to "The C". So my question is : What is the best way to handle this kind of special character with ASP.NET MVC? Thanks!

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  • UIScrollView: Is 806k Image too much too handle? (Crash, out of memory)?

    - by Jordan
    I'm loading a 2400x1845 png image into a scroll view. The program crashes out of memory, is there a better way to handle this? mapScrollView is an UIScrollView in IB, along with a couple of UIButtons. -(void)loadMapWithName:(NSString *)mapName { NSString* bundlePath = [[NSBundle mainBundle] bundlePath]; UIImage *image = [UIImage imageWithContentsOfFile:[NSString stringWithFormat:@"%@/path/%@", bundlePath, [maps objectForKey:mapName]]]; UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; CGSize imgSize = image.size; mapScrollView.contentSize = imgSize; [mapScrollView addSubview:imageView]; [imageView release]; [self.view addSubview:mapScrollView]; }

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  • Jquery background overlay/alert without .onclick event - php responder?

    - by Philip
    Hi guys, I have no experience with jquery or javascript for that matter. I am trying to implement this technique to respond to users for errors or messages in general. lights-out-dimmingcovering-background-content-with-jquery This method uses the onclick event and that's not what im after, I have tried to replace .onclick with .load but that doesn't seem to work. I'm after a quick fix as I really don't have the time to learn jquery or its event handlers. The goal is to catch any errors or message's and once these are called the alert box is called without any further actions such as .onclick. How my code would look: {PHP} $forms = new forms(); if(count($forms->showErrors) > 0 // or == true) { foreach($forms->showErrors as $error) { print('<p class="alert">'.htmlspecialchars($error, ENT_QUOTES).'</p>'); } }

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  • How to fire an event in the code behind when a div's visibility changed?

    - by Vibin Jith
    As part of my web project ,I have designed a div tag like a window form as Shown in the figure.I just want to fill details in the textbox when the user clicks the edit label.The div is Invisible at first time. when the user clicks on edit label ,the form-div get fadein(visible). During this time an event should fired in the code behind. But I am not getting any events in the code behind like visisbility changed or some thing like that. Where can i get this event. Simply i want to display appropriate company name in the textbox in the div , when the user clicks the edit label in each row.

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  • What's the VB.NET equivalent of this C# code for wiring up and declaring an event?

    - by Ben McCormack
    I'm working on a tutorial to build a media player in Silverlight and am trying to wire up an EventHandler to the timer.Tick event of a DispatchTimer object so that the time of the video is synced with a Slider object. The sample code is in C# and I can't for the life of me figure out the proper syntax in VB.NET with RaiseEvent and/or Handles to wire up the event. Below is the relevant C# code. I'll include comments on where I'm getting stuck. private DispatchTimer timer; public Page() { //... timer = new DispatchTimer(); timer.Interval = TimeSpan.FromMilliseconds(50); timer.Tick += new EventHandler(timer_Tick); // <== I get stuck here b/c // I can't do "timer.Tick += ..." in VB.NET } void timer_Tick(object sender, EventArgs e) { if (VideoElement.NaturalDuration.TimeSpan.TotalSeconds > 0) { sliderScrubber.Value = VideoElement.Position.TotalSeconds / VideoElement.NaturalDuration.TimeSpan.TotalSeconds; } }

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  • What's a better way to display a handle for resizing a view on iPhone / iPad?

    - by Christian
    I want to display a handle at the corners of a UIView that can be used to resize the view. How can I display the handles floating on the top of everything else and still have a connection to and be in sync with a view? The solution I implemented before looks like this: I put the view into another view that shows the handles on top of the corners. The problem with this approach is that the handles add extra space to the original view's size. Since Apple recommends at least 40 x 40 px for the size of a button, it is not very little space and also goes beyond the visible bounds of the original view. Another problem is that the original view has to be encapsulated in this 'helper view' object and thus becomes a part of something although it really is the main component.

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  • Calling a void async. - Event based pattern, or another method?

    - by alex
    I have a class that basically stores files in amazon s3. Here is what it looks like (simplified) public class S3FileStore { public void PutFile(string ID, Stream content) { //do stuff } } In my client app, I want to be able to call: var s3 = new() S3FileStore(); s3.PutFile ("myId", File.OpenRead(@"C:\myFile1")); s3.PutFile ("myId", File.OpenRead(@"C:\myFile2")); s3.PutFile ("myId", File.OpenRead(@"C:\myFile3")); I want this to be an asynchronous operation - I want the S3FileStore to handle this (i don't want my caller to have to execute PutFile asynchronously so to speak) but, i want to be able to trap exceptions / tell if the operation completed for each file. I've looked at event based async calls, especially this: http://blogs.windowsclient.net/rendle/archive/2008/11/04/functional-shortcuts-2-event-based-asynchronous-pattern.aspx However, I can't see how to call my PutFile (void) method? Are there any better examples?

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  • How do I process a jQuery SVG group event in a single handler?

    - by rmflow
    I'm trying to draw a button using jQuery SVG, the button is a filled rect and the text is placed on top of the rect. Rect and text are grouped and I want to control the mouseover/mouseout events. The problem is: mouseover/mouseout events are triggered separately for every element of the group. Is it possible to make a single event handler for entire group? Here is an example: gClear = svg.group(); btClear = svg.rect(gClear, 10, 10, 100, h-20, 5 ,5, attrs); txtClear = svg.text(gClear, 35, 30, "Clear", {fontFamily: "Verdana", fontWeight: "bold", fontSize: "16px"}); $(gClear, svg.root()).bind("mouseover", function() { $(btClear).animate({svgFill: '#adf'}, 100); }).bind("mouseout", function() { $(btClear).animate({svgFill: '#fff'}, 100); }) When I move the mouse inside the rect the events mouseover/mouseout are triggered. Can I make "text" events transparent or can I have a single event handler for the group?

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  • Best way to do something when a runloop event is done processing?

    - by quixoto
    I have some processing in my Cocoa app that sometimes ends up calling through a hierarchy of data to do a bunch of work as the result of an event. Each small piece creates and destroys some resources. I don't want those resources around most of the time, but I would like to find a smart way of creating them before all the work and killing them at the end. Short of creating the resources up front and then passing them entirely down through the call hierarchy when work is done, is there a way to know locally in some code when an event loop run has ended? Then I could create them if they're not there, and keep them until the run loop ends, reusing them for any subsequent calls before that time. Thanks.

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  • Can jQuery UI's Sortable handle complex selectors for the items option?

    - by jverdi
    I have list items in an unordered list that when double clicked, can be edited in place via a wysiwyg editor. $('ul.mtm_section').sortable({ disabled: true, distance: 10, items: '> li:not(:has(form))' }); My goal is to prevent the list item from being sorted while it is being edited - aka once a form element has been swapped in place of the contents. Unfortunately my selector for items is not working. Is sortable able to handle complex selectors like these? If not, are there other clever means to disable some items from being sortable, perhaps a callback function? I would prefer to rely on this sortable option, as the wysiwyg plugin is deeply nested with jEditable and as far as I know does not open up any events for me to hook into. Using jQuery 1.4.2 and jQuery UI 1.8.1

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  • what type of errors can we handle using system define unnamed exception in sqlplus?

    - by Aspirant
    I have been trying to access the below code DECLARE N_DEPTNO DEPT.DEPTNO %TYPE :=&DEPT_NUM; V_DNAME DEPT.DNAME %TYPE; NOT_ENOUGH_VALUES EXCEPTION; PRAGMA EXCEPTION_INIT(NOT_ENOUGH_VALUES,-06502); BEGIN SELECT DNAME,LOC INTO DNAME FROM DEPT WHERE DEPTNO = N_DEPTNO; DBMS_OUTPUT.PUT_LINE('Successfully Fetched !!'); EXCEPTION WHEN NOT_ENOUGH_VALUES THEN DBMS_OUTPUT.PUT_LINE('No Enough Values ... '); END; It is still showing error message after specified it in EXCEPTION block. Can i handle these type of errors using PRAGMA EXCEPTION_INIT i.e not providing enough values in the select statement... If not what type of errors can be handled in System Defined Unnamed Exception using PRAGMA EXCEPTION_INIT.

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  • How to handle Clean URIs in Classic ASP using PATH_INFO?

    - by Mario
    I'm trying to handle Clean URIs in a Classic ASP application. In PHP, I was able to use URIs like http://example.com/index.php/foo/bar/baz and have /foo/bar/baz available in the PATH_INFO environment variable. (I usually add a rewrite rule so I do not need the index.php segment) However, I don't seem to be able to mimic this in Classic ASP. If I try http://example.com/index.asp/foo/bar/baz, I get a 404 error. Is there a way to add a path after the index.asp segment and get the PHP like behaviour in ASP? Note: I'm currently using the workaround of rewriting URLs of the form: http://example.com/foo/bar/baz/ to index.asp?path=/foo/bar/baz since I can't seem to get index.asp/foo/bar/baz to work.

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  • How do you handle passwords or credentials for standalone applications?

    - by Abel Morelos
    Let's say that you have a standalone application (a Java application in my case) and that this application has a configuration file (a XML file in my case) where you store the credentials (user and password) for a bunch of databases you need to connect. Everything works great, but now you discover (or your are given a new requirement like me) that you have to put this application in a different server and that you can't have these credentials in the configuration files because of security and/or compliance considerations. I'm considering to use data sources hosted in the application server (a WAS server), but I think this could have poor performance and maybe it's not the best approach since I'm connecting from a standalone application. I was also considering to use some sort of encryption, but I would like to keep things as simple as possible. How would you handle this case? Where would you put these credentials or protect them from being compromised? Or how would you connect to your databases in this scenario?

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  • How can I handle multiple views of a data object? Which design pattern is acceptable?

    - by tranquil.byte
    I have a person object. class Person { private $name; ... } I need to be able to change how they are displayed on the front-end ( visitors have control ). They can choose list view, grid view, photo view for example. class PersonDisplay { public function displayList() { // Query database // Output html to display in list mode } public function displayPhoto() { // Query database // Output html to display in photo mode } } Is this an acceptable way to handle the presentation of the items on the front-end or is there a specific design pattern I should be researching to help me with this task? Does anyone have any suggestions or ideas where this could go wrong or if this could potentially make maintenance a nightmare? The Person object was just an example very similiar to what I am using.

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  • How to handle splitting a file under source control?

    - by sharptooth
    I have a .cpp file and .h file containing a class. Class.cpp contains the implementation and Class.h contains the definition. The class is overcomplicated so I want to separate some code and move it into a separate class. So I create NewClass.cpp and NewClass.h and move the code there. How do I handle this when the files are under SVN? I can simply "svn add" the two new files, but then they will appear as new and will have no history. I could instead "svn copy and rename" the two initial files and edit the the two old files and the two new files - then the two new files will have common history. Which approach is better from the point of version control? Should the new files share history with the old files or should they appear as new?

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  • What is the best way to detect Copy (Ctrl+C) event in an IWpfTextView?

    - by Nick U
    I am trying to detect a copy event in the text view and I have been researching the best way to do this. Is it to possibly hook into the StandardCommand Copy event somehow and detect it that way? Or is it possible to use the KeyProcessor(and simply detect Ctrl+C keypresses)? My extension is currently implementing the IWpfTextViewCreationListener; is there a way to somehow get access to the KeyProcessor or StandardCommand from the IWpfTextView that the listener is passing to me? If so, can you post a code sample that demonstrates this? Thanks, Nick

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  • Asp.net - Invalid postback or callback argument. Event validation is enabled using '<pages enableEv

    - by Jangwenyi
    I am getting the following error when I post back a page from the client-side. I have javascript code that modifies an asp:listbox on the client side. How do we fix this? Error details below: Server Error in '/XXX' Application. -------------------------------------------------------------------------------- Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.ArgumentException: Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [ArgumentException: Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.] System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +2132728 System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +108 System.Web.UI.WebControls.ListBox.LoadPostData(String postDataKey, NameValueCollection postCollection) +274 System.Web.UI.WebControls.ListBox.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) +11 System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +353 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1194 -------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

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  • How do I handle user authorization the safest way?

    - by Irro
    I'm developing a small website where I'm going to allow user to create accounts but I'm quite clueless when it comes to safety around authorizations. I have built my project in PHP with codeigniter and found a library (Tank Auth) that could handle authorization for me. It stores password in a safe way but I'm still worried about the part when the user sends their password to my server. One easy way to do it would be to send the password in a post-request but I would guess that it's quite easy to sniff such a password. Should I do something with the password on the client side before sending it to my server? And is there any good javascript libraries for this?

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  • Is there such a thing as a dektop application event aggregator, similar to that used in Prism?

    - by brownj
    The event aggregator in Prism is great, and allows loosely coupled communication between modules within a composite application. Does such a thing exist that allows the same thing to happen between standalone applications running on a user's desktop? I could imagine developing a solution that uses WCF with TCP binding and running inside Windows Process Activation Service. Client applications could subscribe or publish events to this service as required and it would ensure all other listeners get notified of events as appropriate. Using TCP would enable event messages to be pushed out to clients without the need for polling, ensuring messages are delivered very quickly. I can't help but think though that such a thing would already exist... Is anyone aware of something like this, or have any advice on how it may be best implemented?

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