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• Keystrokes in Winforms app causing window to close unexpectedly

  - by Paul Sasik

  I have a strange issue that has arisen recently: Whenever I enter text, even a single character, into a textbox in any Form in my application it causes the form and its parent to close. I've checked for the following so far: Errant/mis-assigned event handlers that may be interpreting a keystroke as a Form cancel I am using keypreview in several windows but debugging shows this to not be a cause Happens in any form of the application Happens even with brand new text boxes dropped on the form Tried removing the WithEvents declaration from text box declarations (VB.NET) The result is DialogResult.Cancel when I break the code after Show or ShowDialog The forms do not use AcceptButton or CancelButton properties (set to none) Note: I am modifying a large codebase with a lot of code that I have yet to touch What else could be causing this strange behavior?

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• How do you set a variable value from another form?

  - by flavour404

  Hi, c# .Net 3.5 visual studio 2008, windows xp I have a main form in a project, given a specific set of circumstances another form is instantiated and displayed to the user: Form frmT = new frmTargetFolder(expName, this); frmT.Show(); As you can see, I am passing a reference to the new form from the current one. My question is, what do I have to do to a method so that it is exposed to the new form, the same for a variable? I have tried defining the functions as public, but I can't seem to access them, also I have written a Get and Set method for a variable, again how do I expose these functions and methods to other forms? public void hit() { MessageBox.Show("hit it"); } bool setOverRide { get { return OverRide; } set { OverRide = value; } } The main form is called frmDataXfer and the form, form which I am trying to call the functions and methods of frmDataXfer is called frmTargetFolder, an instance of which is created in the frmDataXfer and referenced as frmT. Thanks, R.

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• MagicLibrary.dll 32bit convert for 64bit

  - by Nullstr1ng

  Hi Guys, I recently received an email about a guy who like to make my software compatible with 64Bit Windows 7 OS. I have 1 single problem though .. I have followed a steps regarding on compiling VS Solution/Project for 64bit. But when I start to to compile the solution for 64bit, this "Crownwood.Magic.Forms" (MagicLibrary.dll) doesn't work anymore. This is the compilation error message "Error 6 The type or namespace name 'Crownwood' could not be found (are you missing a using directive or an assembly reference?)" Please don't tell me I did not referenced the MagicLibrary.dll It's a bit of confusing because the MagicLibrary.dll is already in my reference list. I also remove and add it back. There was this CorFlags.exe but am not sure how to convert it to 64bit. "CorFlags MagicLibrary.dll /32BIT- /Force" did not work.. :( Please help. Thanks in advance - Jayson

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• 3rd party data - Store in Data Warehouse or Primary database?

  - by brydgesk

  This is mostly a data warehouse philosophy question. My project involves an Oracle forms application, and a Teradata Data Warehouse for reporting and ad-hoc purposes. In addition to the primary data created by the users of our application, we also require data from various other sources. Currently, this 3rd party data comes via FTPd flat files directly to our Data Warehouse. To access the data, our users must use a series of custom BusinessObjects reports. My question is, would it make more sense for this data to be sent to our source Oracle system instead? Is it ever appropriate for a Data Warehouse to be the point of origin for users to access raw data? In short, is it more important that the operational database contain only the data created by your project, or that the data warehouse remain dedicated solely to reporting and analysis?

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• C# settings using ApplicationSettingsBase - roaming and common

  - by Mark Pim

  I'm using the Windows Forms Application settings architecture (or however you're supposed to refer to it) and am successfully saving user settings to AppData. What I want to do is have some settings common to all users of a particular machine and some settings which roam with users across machines. For example I have some settings relating to a peripheral attached to the computer (model, settings etc.) and some user preferences like user interface colours. The colours preferences should roam with the user, but the peripheral settings should stay on the local computer no matter who's logged on. How can I mark these types of settings so that some get stored in /AppData/... and some in /AppData? Note that I don't want Application level settings - each computer the app will be installed on will have different settings. I'm targetting .Net 3.0 if that makes a difference.

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• Logoff button IIS6 ASP.NET Basic Authentication

  - by willyconnor

  I have a requirement for an explicit logout button for users in a ASP.NET web app. I am using IIS6 with Basic Authentication (SSL). I can redirect to another web page but the browser keeps the session alive. I have googled around and found a way to do it by enabling an active x control to communicate with IIS and kill the session. I am in a restricted environment that does not allow forms authentication and active x controls are not forbidden as well. Has anyone else had this requirement and how have you handled it? Okay that is what I was afraid of. I have seen similar answers on the net and I was hoping someone would have a way of doing it. Thanks for your time though. I guess I can use javascript to prevent the back button like the history.back()

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• How do I test SendInput in c#

  - by JoelHess

  How can I tell if my call to SendInput is working properly? I have a small snippet below, and the message never seems to get hit. SendInput() returns 1, and there's no errors, so I assume that the message is going out properly. I've also tried the Form KeyPress and KeyDown Events, and I never seem to get those either. private void button1_Click(object sender, EventArgs e) { INPUT input = new INPUT(); input.mkhi.ki.wVk = (byte)System.Windows.Forms.Keys.B; uint result = SendInput(1, ref input, Marshal.SizeOf(new INPUT())); } protected override void WndProc(ref Message m) { if (m.Msg == WM_KEYDOWN) { Console.WriteLine("GotIt"); } base.WndProc(ref m); }

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• PHP Session when using desktop app

  - by Jonathan

  In this question I asked how to POST to a php file form a vb.net app: http://stackoverflow.com/questions/2615335/post-to-webpage-in-vb-net-win-forms-desktop-not-asp-net So now I've logged in the user user by posting their username and password to the php file, the php file then does security/checks they exist/etc and if both username and password are correct is stores the user ID in a session variable. Now if the vb.net app tries to download data off a page which needs the user to logged in, it checks this by doing: if (!isset($_SESSION['uid'])) { header("Location: index.php"); } However after having logged correctly in the app the session variable is not set. How does session work with a vb.net app like this? When the user logs in successfully should I download the user id and keep it in the vb.net app and then post it to each page that requires authentication?

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• How do I upgrade my Crystal Report libraries in a .NET 3.5 project to CR XI R2?

  - by Stuart B

  Our project currently uses Crystal Reports for Visual Studio 2008. We need to upgrade to XI R2, but I'm having problems doing so. Here are the steps I followed: Install Crystal Reports XI R2. Collect updated assemblies from the GAC. I did this because I couldn't find version XI libraries in the "Add References..." dialog. I verified that these assemblies were of version 11.5.*. The libraries I gathered were: CrystalDecisions.CrystalReports.Engine CrystalDecisions.Enterprise.Framework CrystalDecisions.Enterprise.InfoStore CrystalDecisions.ReportSource CrystalDecisions.Shared CrystalDecisions.Windows.Forms Replace all references in my projects to version 10.5 Crystal libraries with references to the newer assemblies. Everything builds fine, but when I try to instantiate a ReportDocument, I get this error: The type initializer for 'CrystalDecisions.CrystalReports.Engine.ReportDocument' threw an exception. Is there anything I'm missing? Will this just not work?

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• Semi-transparent PNG Image on transparent Form

  - by Marco Bruggmann

  Hello, I have a problem dealing with transparent images on transparent Forms. I have been trying and looking for a solution but nothing useful came up. The problem is: I have a Form, this Form has a Panel and the Panel has a PictureBox. Form and Panel are transparent. Now, if the image of the PictureBox has no semi-transparent it works. But if there is a gradient transparency then the "transparent color" is shown. I need the Panel and the PictureBox, so the PerPixelAlpha does not apply for this case. The Form will also have more Controls that should be visible and non transparent (just the PNG image should be transparent). The image below shows: [Left] When the Panel is not transparent. [Center] When the Panel is transparent. [Right] Desired effect (done with PerPixelAlpha). http://www.freeimagehosting.net/uploads/3937fe974d.jpg THX Marco

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• Test assembly code on a mac

  - by happyCoding25

  Hello, A while back I was following some tutorials an assembly. I was running it all on a windows machine, compiling with NASM and then writing the compiled code to a floppy disk, then reboot and try the code. This process was long and time consuming and sadly was not on a mac. When I found out that Xcode for mac installed NASM I immediately tried to compile some code. The code compiled fine. The issue is testing it. On a mac I have no floppy (not like I want to use one) so Im not sure how to test this. I looked in to Q (kju) and found it would only emulate things on an ISO file. So I guess what Im asking is is it possible to install the compiled code on an ISO file for testing? (Note: the code when compiled forms a .bin file) Thanks for any help

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• Best practice for submits redirecting to another page in MVC2?

  - by blesh

  I have a situation with my MVC2 app where I have multiple pages that need to submit different information, but all need to end up at the same page. In my old Web Forms app, I'd have just accomplished this in my btnSave_Click delegate with a Redirect. There are three different types of products, each of which need to be saved to the cart in a completely different manner from their completely different product pages. I'm not going to get into why or how they're different, just suffice to say, they're totally different. After they're saved to the cart, I need to "redirect" to the Checkout view. But it should be noted, that you can also just browse straight to the Checkout view without having to submit any products to add to the cart. Here's a diagram of what I'm trying to accomplish, and how I think I need to handle it: Is this correct? It seems like a common scenario, but I haven't seen any examples of how I should handle this. Thank you all in advance.

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• MVC2: Best Way to Intercept ViewRequest and Alter ActionResult

  - by Matthew

  I'm building an ASP.NET MVC2 Web Application that requires some sophisticated authentication and business logic that cannot be achieved using the out of the box forms authentication. I'm new to MVC so bear with me... My plan was to mark all restricted View methods with one or more custom attributes (that contain additional data). The controller would then override the OnActionExecuting method to intercept requests, analyze the target view's attributes, and do a variety of different things, including re-routing the user to different places. I have the interception and attribute analysis working, but the redirection is not working as expected. I have tried setting the ActionExecutingContext.Result to null and even have tried spooling up controllers via reflection and invoking their action methods. No dice. I was able to achieve it this way... protected override void OnActionExecuting(ActionExecutingContext filterContext) { filterContext.HttpContext.Response.Redirect("/MyView", false); base.OnActionExecuting(filterContext); } This seems like a hack, and there has to be a better way...

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• Large PHP enable web form - around 75 field - how best to send email with all fields?

  - by Derek

  Have created simple Ajax enabled contact forms before that have around 12 fields - worked fine.... Now working on a PHP enabled web page for job applications that has around 100 fields. The ajax technique I was using was to send request via querystrings (&val1=test;&val2=test2 and etc ...) That is not going to scale very well with larger form with 100+ fields. Any suggestions to point me in the right direction would be appreciated. Maybe use jQuery Form plug-in instead? http://jquery.malsup.com/form/#getting-started Derek

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• Analysing a Visual Foxpro application to derive requirements. Tools/approaches/practices?

  - by Kabeer

  Hello. In an upcoming project I am supposed to re-engineer a huge application built on Visual Foxpro into a web-application. The target platform is .Net. The application from the end-users' perspective is very complex (complex forms, reports, navigation, etc). The sorry state is that there are no documents available from which I can derive, business processes, business rules, work-flows, validations, application state, etc. I can gather some requirements from end-users but it cannot be complete from any perspective. Maneuvering through the code would be tedious & time consuming, given the millions of lines of code. Therefore I am looking for a tool that can help me in code analysis. My googling attempt didn't help me at least for a Visual Foxpro code base. Besides, I will appreciate if someone can share processes/approaches/techniques to establish the requirements as far as possible. BTW, this link didn't quite help.

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• Override tooltip text for Titlebar buttons (Close, Maximize, Minimize, Help)

  - by Tim

  I have been trying without luck to change the text of the tooltip that appears for the buttons on the main title bar of a form. In a nutshell, we have harnessed the 'Help' button for Windows Forms to have some other purpose. This is working fine. The issue is that when hovering the mouse over that button, a 'Help' tooltip appears, which doesn't make any sense for the application. Ideally, there would be some way to change the text of that tooltip for my application; however, at this point I would be satisfied just finding a way to disable the tooltips altogether. I know that you can disable the tooltips for the entire OS by modifying the 'UserPreferencesMask' key in regedit, but I would really like a way to have this only affect my application. Again, ideally there would be some way to do this with managed code, but I would not be opposed to linking into the Windows API or the like. Thanks for any suggestions for resolving this issue!

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• What makes MVVM uniquely suited to WPF?

  - by Reed Copsey

  The Model-View-ViewModel is very popular with WPF and Silverlight. I've been using this for my most recent projects, and am a very large fan. I understand that it's a refinement of MVP. However, I am wondering exactly what unique characteristics of WPF (and Silverlight) allow MVVM to work, and prevent (or at least make difficult) this pattern from working using other frameworks or technologies. I know MVVM has a strong dependency on the powerful data binding technology within WPF. This is the one feature which many articles and blogs seem to mention as being the key to WPF providing the means of the strong separation of View from ViewModel. However, data binding exists in many forms in other UI frameworks. There are even projects like Truss that provide WPF-style databinding to POCO in .NET. What features, other than data binding, make WPF and Silverlight uniquely suited to Model-View-ViewModel?

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• Parsing plain Win32 PE File (Exe/DLL) in C#.NET

  - by Usman

  Hello, I need to parse plain Win32 DLL/Exe and need to get all imports and exports from it and to show it on console or GUI(say Win Forms). Is it possible to parse Win32 DLL/Exe in C#.NET, read its export table,import table and get managed types from it. As its unmanaged PE(.NET doesn't allows you to convert unmanaged PE files to managed .NET assemblies, only it generates COM managed assemblies). So how to parse export and import tables of PE files and take all methods(signatures from it) in managed form.(e.g if char* as argument, it should display as IntPtr) Regards Usman

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• The best approach for multilingual user interface

  - by Mehdi Golchin

  I am working on a multilingual web application. I'm wondering how do i design the best user interface that the user can localize data for various languages? for instance, in making a page which its title is different in every lang, do i put a textbox for every one? it's not a suitable way to do(in case of 10 lang, the user has 10 textbox!!! too silly) what is your idea about this? Edit: i have no problem with globalization in my system. in fact, i'm looking for a good way for my interface design which user can enter his data to my forms in various langs. thanks in advance

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• Load a Settings.settings into ListView?

  - by clefranc

  Hi, I've managed to save ListView items to a System.Collections.Specialized.StringCollection property settings using this LINQ one liner: My.Settings.Property1.AddRange(ListView1.Items.Cast(Of ListViewItem)().[Select](Function(a) String.Join(Convert.ToChar(Keys.Tab), a.SubItems.Cast(Of System.Windows.Forms.ListViewItem.ListViewSubItem)().[Select](Function(s) s.Text).ToArray())).ToArray()) Now, I want to do the opposite, ie load the ListView1 from the My.Settings.Property1. It's fairly easy to do using a For Each loop, but I wonder if someone can show me a similar LINQ query. The lines in My.Settings.Property1 looks like this (Tab separated): Word1 Word2 Word3 Word4 Word5 Word6 Original code is from this answer: http://stackoverflow.com/questions/2295068/show-listview-items-in-a-combobox

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• Using Linq methods causes missing references to DependencyObject in WindowsBase

  - by Jason Coyne

  I have some c# source that I want to compile using CodeDom within my application (for a plugin) Everything works fine, except if I use a Linq extension function on some of my collections var dict = new Dictionary<KeyType, ValueType>(); .... dict.Any(KV=>KV.Key == "Some Key); When I try to compile source that has this code, it CodeDom complains that I am missing a reference to DependencyObject in WindowsBase. I do not understand why this is happening. Neither the Dictionary class, or the Any extension method reference that class, which apparently is part of Windows.Forms I would normally just ignore the quirk, make the CodeDom add a reference and move on, but Apparently WindowsBase is special and is not always distributed and I don't want to cause issues for users that may not have it installed correctly.

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• ASP.net dealing issues with production system

  - by nettguy

  First time i am going to work on (maintenance project) application that is already in production.The application was developed in ASP.net 3.5/C# 3.0(web forms) with jQuery,Ajax,Sql server 2005 and microsoft enterprise library 4.0.,WCF services. Questions (bear with me if my question is wrong) 1) Is it possible to use Visual Studio (2008 with SP1) to debug the remote application (i.e already in production)?.What are the tools do i need to use in order to keep track the things in case something went wrong? 2) Simply looking into Log file ,will solve the issues? 3) After having done with enhancements,is it possible to directly deploy the DLLs into production server.Won't it affect the running application? Please guide me what are the procedures i need to follow.Client is ready to provide any tools for my support.(What are the area do i need to aware to handle production system) Thanks in advance.

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• How can a Delphi TForm / TPersistent object calculate its own deserialization time?

  - by mjustin

  For performance tests I need a way to measure the time needed for a form to load its definition from the DFM. All existing forms inherit a custom form class. To capture the current time, this base class needs overriden methods as "extension points": start of the deserialization process after the deserialization (can be implemented by overriding the Loaded procedure) the moment just before the execution of the OnFormCreate event So the log for TMyForm.Create(nil) could look like: - 00.000 instance created - 00.010 before deserialization - 01.823 after deserialization - 02.340 before OnFormCreate Which TObject (or TComponent) methods are best suited? Maybe there are other extension points in the form creation process, please feel free to make suggestions.

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• [C#] GrayScale (by ColorMatrix) causes OutOfMemoryException. Why ?

  - by Tony

  I have 2 forms, A and B. On the Form A, I click a button and an Image is being loaded to a PictureBox located ona the Form B. And, I want to set GrayScale to this image by: public void SetGrayScale(PictureBox pb) { ColorMatrix matrix = new ColorMatrix(new float[][] { new float[] {0.299f, 0.299f, 0.299f, 0, 0}, new float[] {0.587f, 0.587f, 0.587f, 0, 0}, new float[] {0.114f, 0.114f, 0.114f, 0, 0}, new float[] { 0, 0, 0, 1, 0}, new float[] { 0, 0, 0, 0, 0} }); Image image = (Bitmap)pb.Image.Clone(); ImageAttributes attributes = new ImageAttributes(); attributes.SetColorMatrix(matrix); Graphics graphics = Graphics.FromImage(image); graphics.DrawImage(image, new Rectangle(0, 0, image.Width, image.Height), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attributes); graphics.Dispose(); pb.Image = image; } This code works properly when the PictureBox is on the same form (A). But, when it is on the Form B, the OutOfMemoryException is raised. Why ?

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• JPA Cascade delete.

  - by Win Man

  Hi, I am new to JPA/Hibernate. Currently using EJB3, Hibernate/JPA. I have an inheritacnce structure as follows.. @Entity @DiscriminatorColumn(name = "form_type") @Inheritance(strategy = InheritanceType.JOINED) @GenericGenerator(name = "FORMS_SEQ", strategy = "sequence-identity", parameters = @Parameter(name = "sequence", value = "FORMS_SEQ")) @Table(name = "Forms") public abstract class Form{ //code for Form } @Entity @Table(name = "CREDIT_CARDS") @PrimaryKeyJoinColumn(name="CREDIT_CARD_ID") public class CreditCardForm extends Form { //Code for CreditCards. } When I add a row with save the rows are properly inserted into the parent and the child table. However when I try to delete I get an error - 10:19:35,465 ERROR [TxPolicy] javax.ejb.EJBTransactionRolledbackException: Removing a detached instance com.data.entities.form.financial.CreditCard#159? I am using a simple for loop to determine the inheritance type - CreditCard or DebitCard and then calling entityManager.remove(entity). What am I doing wrong? Code for delete.. for(Form content: contents){ if(content.getType()==Type.CREDIT_CARD){ creditCardService.delete((CreditCard)content); } Thanks. WM

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