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• HOW TO SElect line number in TextBox Multiline

  - by Alhambra Eidos

  Hi all, I have large text in System.Windows.Forms.TextBox control in my form (winforms), vs 2008. I want find a text, and select the line number where I've found that text. Sample, I have fat big text, and I find "ERROR en línea", and I want select the line number in textbox multiline. string textoLogDeFuenteSQL = @"SQL*Plus: Release 10.1.0.4.2 - Production on Mar Jun 1 14:35:43 2010 Copyright (c) 1982, 2005, Oracle. All rights reserved. ** MORE TEXT **** Conectado a: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production With the Partitioning, Data Mining and Real Application Testing options WHERE LAVECODIGO = 'CO_PREANUL' * ERROR en línea 2: ORA-00904: ""LAVECODIGO"": identificador no v?lido INSERT INTO COM_CODIGOS * ERROR en línea 1: ORA-00001: restricción única (XACO.INX_COM_CODIGOS_PK) violada"; ** MORE TEXT **** Any sample code about it ? thanks in advanced,

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• How to protect web site against hackers?

  - by Adi barda

  Hi Guys, Like everyone of us, I have my own dreams about developing the next cool product that will be adopted by many users and become industry standard. Surprisingly, I find that the most challenging task is to keep my website up & running. My site is being hacked again and again no matter what I do - I blocked the FTP connections, changed the Joomla (CMS) database table names, installed all latest patches and what not. The web site supports the product (over 1800 users now...) by generating licenses, support forums, documentation, galleries etc. The product which is a winforms application cannot be marketed without this web site. My question: Do you have any innovative idea about securing joomla based web sites or what is the best secured web hosting you know. currently i'm hosting my site at ixwebhosting and i like them very much but obviously i can't do any serious marketing being hacked over and over again Thank you very much, Adi Barda

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• How to enforce min-width/height of a control to be always visible in WPF?

  - by MartyIX

  Hello, I've got an application and I would like to know if there's a way how to keep the whole visual element always visible. I thought that minWidth/minHeight will do that but it only changes the minimal size of the element but it doesn't enforces that the whole visual element is visible. I think what I need is minWidth from WinForms where it works exactly as I need. Example: Setting minWidth and minHeight for Window works but if I set minWidth for a StackPanel in Window the window can be resized so that the minWidth of StackPanel is ignored (actually the StackPanel has the requested size but it's hidden). Thank you for any suggestion!

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• What is the equivalent to Java's canvas object in C#?

  - by Winston

  I'm working on creating a basic application that will let a user draw (using a series of points) and I plan to do something with these points. If this were Java, I think I would probably use a canvas object and some Java2D calls to draw what I want. All the tutorials I've read on C#/Drawing involve writing your own paint method and adding it to the paint event for the form. However, I'm interested in having some traditional Form controls as well and I don't want to be drawing over them. So, is there a "Canvas" object where I can constrain what I'm drawing on? Also, is WinForms a poor choice given this use case? Would WPF have more features that would help enable me to do what I want? Or Silverlight?

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• Metatool for automatic xml code generation

  - by iceman

  I want to develop a programming tool for developers which can do automatic xml code generation for specifying a GUI design and its controls. The aim is to allow non-programmers specify GUI controls(which in this case perform higher level task unlike WinForms ) from a GUI. So the xml code generated is essentially an internal representation which programmers can understand and further use in any automatic GUI generator. So the workflow is GUI(non-programmers)-xml(for programmers)-GUI(non-programmers). Is there a Microsoft project similar to this?

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• Storing credit card details

  - by Andrew

  I have a business requirement that forces me to store a customer's full credit card details (number, name, expiry date, CVV2) for a short period of time. Rationale: If a customer calls to order a product and their credit card is declined on the spot you are likely to lose the sale. If you take their details, thank them for the transaction and then find that the card is declined, you can phone them back and they are more likely to find another way of paying for the product. If the credit card is accepted you clear the details from the order. I cannot change this. The existing system stores the credit card details in clear text, and in the new system I am building to replace this I am clearly not going to replicate this! My question, then, is how I can securely store a credit card for a short period of time. I obviously want some kind of encryption, but what's the best way to do this? Environment: C#, WinForms, SQL-Server.

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• Advantage of using Thread.Start vs QueueUserWorkItem

  - by Cheeso

  In multithreaded .NET programming, what are the decision criteria for using ThreadPool.QueueUserWorkItem versus starting my own thread via new Thread() and Thread.Start()? In a server app (let's say, an ASP.NET app or a WCF service) I think the ThreadPool is always there and available. What about in a client app, like a WinForms or WPF app? Is there a cost to spin up the thread pool? If I just want 3 or 4 threads to work for a short period on some computation, is it better to QUWI or to Thread.Start().

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• Do you know of a free .Net component for visual flow model graph design and editing?

  - by Ivan

  An app (C#4, WinForms, Entity Framework, SQL Server 2008) of mine maintains a graph of interconnected objects, each having some simple member fields and a set of many directed (in and out) one-to-one links to other objects. I'd like to offer a user an ability to view and edit this graph visually some way, creating and removing connections, modifying objects attributes values and introducing/dropping objects. I suppose there has to be a framework (at list a primitive kind of) for this as visual model design tools are pretty common to meet. Do you know one?

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• How can I add array data in winform datagridview?

  - by Phsika

  I generated Personel[] type array from Biz.Bal.GetPersonelById("1") but if I want to add winforms, I do that like below. Is there any simple method? Like GridView.dataSource=myArray? private void Form1_Load(object sender, EventArgs e) { Form_init(); Model.Personel[] list = new Model.Personel[0]; list = Biz.BAL.GetPersonelByID("1"); dataGridView1.Rows[0].Cells[0].Value = list[0].ID; dataGridView1.Rows[0].Cells[1].Value = list[0].Ad; dataGridView1.Rows[0].Cells[2].Value = list[0].SoyAd; dataGridView1.Rows[0].Cells[3].Value = list[0].Maas; dataGridView1.Rows[0].Cells[4].Value = list[0].Departman; }

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• C# and Linq: Generating SQL Backup/Restore From Code

  - by mdvaldosta

  I'm working with a C# and Linq to SQL Winforms app and needed to integrate backup and restores through the program. I used SMO and got it working pretty smoothly. The issue, however, is that the app is deployed using ClickOnce, which I like very much - but since I had to include the dll's the download size jumped from 3mb = 15mb. I know they've only got to download it once, but it also sucks for me as Visual Studio 2010 seems to upload the dll's every time and that takes a while on AT&T broadband (eh). So, anyone have any suggestion on how I can work out an effective backup/restore solution without using SMO objects?

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• WCF does not generate the properties

  - by BDotA

  I have a .NET 1.1 ASMX and want to use it in a client WinForms app. If i go wit the old way and add it as a "WebRefrence" method then I will have access to two of its properties which are "url" and "UseDefaultCredentials" and it works fine. But if I go with the new WCF way and add it as a ServiceReference I still have access to the methods of that ASMX but those two properties are missing. what is the reason for that? so for example in the old way ( adding WebReference) these codes are valid: TransferService transferService= new TransferService(); transferService.Url = "http://something.asmx"; transferService.Credentials = System.Net.CredentialCache.DefaultCredentials; string[] machines = transferService.GetMachines(); But in the new way ( adding Service Reference ) using(TransferServiceSoapClient transferServiceSoapClient = new TransferServiceSoapClient("TransferServiceSoap")) { transferServiceSoapClient.Url = "someUrl.asmx"; //Cannot resolve URL transferServiceSoapClient.GetMachines(new GetMachinesRequest()); transferServiceSoapClient.Credentials = .... // //Cannot resolve Credentials }

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• What to write in "Web location" field when starting an "New website" in Visual Studio 2010?

  - by Ivan

  I want a website to be deployed automatically to a local IIS (built in Windows XP Pro SP3), avoiding VisualStudio-built-in server if possible. I'd like development source files to be stored in a project folder outside wwwroot (I wouldn't mind built files to be copied to wwwroot each time I press F5). I don't store my projects inside default directories inside "My documents". What should I specify as in "Web location" when starting an "New website" in Visual Studio 2010? A deployment path in wwwroot, a folder where I'd like to save my project, or something else? I want the website to be a part of a complex solution in VS 2010, also icludinc a class libray project, a WinForms application project, a Windows Service project and a common Entitity Framework data model.

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• Send file by webservice

  - by phenevo

  Hi, I have webservice, wwith method: [WebMethod] public byte[] GetFile(string FName) { System.IO.FileStream fs1 = null; fs1 = System.IO.File.Open(FName, FileMode.Open, FileAccess.Read); byte[] b1 = new byte[fs1.Length]; fs1.Read(b1, 0, (int)fs1.Length); fs1.Close(); return b1; } and it works with small file like 1mb, but when it comes to photoshop's file (about 1,5gb) I get: System.OutOfMemoryException The idea is I have winforms application which get this file and saving it on local disc.

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• Embedded web server and gui framework for .NET applications

  - by Toad

  Hi, I'm looking for a framework which allows me to manage my application through a webbased GUI (using an embedded webserver) instead of winforms. Something like this: http://www.webtoolkit.eu/wt but then for .NET In my code I should be able to instantiate classes (like buttons, forms etc), and when a user browses to a given port, the app should render it as javascript/ajax etc etc. preferably, when buttons are pushed, a notification in my code should be called. this is a less specific question than another one I posted about extjs. I hope this will attract more viewers since it is more generic Thanks. Update: cassini like solutions don't fit the bill. Since the webbrowser is embedded in my application, there is no need for ASP.NET server side scripts. I would rather have the framework, call functions inside my application when things happen on the page. onButtonClicked() for instance.

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• iPhone equivalent of Application.DoEvents();

  - by BahaiResearch.com

  iPHone: We use MonoTouch, but Obj-C answers are ok. My singleton domain object takes a while to get all the data so it runs internally parts of the fetch in a thread. I need to inform the UI that the domain is done. Currently I do this. Is there a better way? In WinForms I would call Application.DoEvents() instead of Thread Sleep. PlanDomain domain = PlanDomain.Instance (); while (domain.IsLoadingData) { Thread.Sleep (100); //this is the main UI thread } TableView.Hidden = false; TableView.Source = new TableSource (this); TableView.ReloadData ();

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• ADO.NET parameters from TextBox

  - by Geo Ego

  I'm trying to call a parameterized stored procedure from SQL Server 2005 in my C# Winforms app. I add the parameters from TextBoxeslike so (there are 88 of them): cmd.Parameters.Add("@CustomerName", SqlDbType.VarChar, 100).Value = CustomerName.Text; I get the following exception: "System.InvalidCastException: Failed to convert parameter value from a TextBox to a String. ---> System.InvalidCastException: Object must implement IConvertible." The line throwing the error is when I call the query: cmd.ExecuteNonQuery(); I also tried using the .ToString() method on the TextBoxes, which seemed pointless anyway, and threw the same error. Am I passing the parameters incorrectly?

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• Unhandled exceptions in BackgroundWorker

  - by edg

  My WinForms app uses a number of BackgroundWorker objects to retrieve information from a database. I'm using BackgroundWorker because it allows the UI to remain unblocked during long-running database queries and it simplifies the threading model for me. I'm getting occasional DatabaseExceptions in some of these background threads, and I have witnessed at least one of these exceptions in a worker thread while debugging. I'm fairly confident these exceptions are timeouts which I suppose its reasonable to expect from time to time. My question is about what happens when an unhandled exception occurs in one of these background worker threads. I don't think I can catch an exception in another thread, but can I expect my WorkerCompleted method to be executed? Is there any property or method of the BackgroundWorker I can interrogate for exceptions?

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• Multiline for WPF TextBox

  - by baron

  I am developing a app for sending some feedback. Basically i'm trying to make a TextBox for comments, but i'm used to the WinForms MultiLine=true. I've set MinLines to 3, which is getting there, but preferably i'd like if user is able to type wherever in this block, like press enter and do dot points sort of thing - like: - Item 1 blah - Item 2 blahlb lahbvl d But at the moment the text all stays on one line. - Item 1 blah - Item 2 blahb blahb blah This comments will then help fill the body of an email which is sent. It may be pointless if I can't easily keep the same formatting when putting this string into the email body string (so that it looks like it does when sent as it does when typed). Can I achieve what I'm after or do I have to leave it as all text on one line?

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• Call Babel .Net Obfuscator from C# Code

  - by aron

  Hello, I have a C# WinForms app that I use to create software patches for my app. In noticed that Babel .Net includes Babel.Build.dll and Babel.Code.dll Is there a way, in my C# code, I can call Babel .Net something like: ExecuteCommand(C:\Program Files\Babel\babel.exe "C:\Patch\v6\Demo\Bin\Lib.dll" --rules "C:\Patch\babelRules.xml", 600) Here's a common script to execute a CMD prompt in C#. However if I just include the Babel.Build.dll in my winform I may be able to do it seamlessly. public static int ExecuteCommand(string Command, int Timeout) { int ExitCode; ProcessStartInfo ProcessInfo; Process Process; ProcessInfo = new ProcessStartInfo("cmd.exe", "/C " + Command); ProcessInfo.CreateNoWindow = true; ProcessInfo.UseShellExecute = false; Process = Process.Start(ProcessInfo); Process.WaitForExit(Timeout); ExitCode = Process.ExitCode; Process.Close(); return ExitCode; }

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• Programmatically adding a site to the Allowed Sites of the IE Pop-up Blocker (VB.NET)

  - by GlueR

  A few more details. I need to programmatically (Winforms, VB.NET) check if a site is in the Allowed Sites list of the IE Pop-Up Blocker (IE 7 and 8 and Windows XP, Vista and 7) and if not, add it. The application is fully trusted and I don't want to disable the Pop-Up blocker entirely. To clarify some things, this is for a web-automation application with several users across 3 countries. I want to avoid receiving tons of emails and explaining each time how to add the website to the Allowed Sites manually. Also, some of the users have Google Toolbar installed, which also has a Popup Blocker creating trouble to my app. Can this also be done programmatically?

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• where can I find useful VB.NET web development videos ?

  - by ahmed

  Hi , I have tried Asp.Net but they have minimum sets of tutorials and videos. I am looking for a video tutorials like pluralsight training videos which is not free. But I am looking for free training videos for Vb.Net/webforms and SQL "CRUD", Sql DataBinding videos, runtime designing , runtime databinding and all. Thanking you all in advance. And also I am sorry if this is a repeat question. And one thing which I like to say is why do people go first with winforms when someone says vb.net ? Is there any specific way to say for webforms ? OR how should I say it for web development in VB?

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• Is there a way to change the maximum width of a window without using the WM_GETMINMAXINFO message?

  - by David

  I want to change the imposed Windows maximum width that a window can be resized to, for an external application's window (not my C#/WinForms program's window). The documentation of GetSystemMetrics for SM_CXMAXTRACK says: "The default maximum width of a window that has a caption and sizing borders, in pixels. This metric refers to the entire desktop. The user cannot drag the window frame to a size larger than these dimensions. A window can override this value by processing the WM_GETMINMAXINFO message." Is there a way to modify this SM_CXMAXTRACK value (either system wide or for one particular window), without processing the WM_GETMINMAXINFO message? Maybe an undocumented function, a registry setting, etc.? (Or: The documentation for MINMAXINFO.ptMaxTrackSize says: "This value is based on the size of the virtual screen and can be obtained programmatically from the system metrics SM_CXMAXTRACK and SM_CYMAXTRACK." Maybe there is a way to change the size of the virtual screen?) Thank you

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• Window screenshot using WinAPI

  - by Evl-ntnt

  How to make a screenshot of program window using WinAPI & C#? I sending WM_PAINT (0x000F) message to window, which I want to screenshot, wParam = HDChandle, but no screenshot in my picturebox. If I send a WM_CLOSE message, all waorking (target window closes). What I do wrong with WM_PAINT? May be HDC is not PictureBox (WinForms) component? P.S. GetLastError() == "" [DllImport("User32.dll")] public static extern Int64 SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam); ..... SendMessage(targetWindowHandle, 0x000F, pictureBox.Handle, IntPtr.Zero);

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• C# huge size 2-dim arrays

  - by 4eburek

  I need to declare square matrices in C# WinForms with more than 20000 items in a row. I read about 2GB .Net object size limit in 32bit and also the same case in 64bit OS. So as I understood the single answer - is using unsafe code or separate library built withing C++ compiler. The problem for me is worth because ushort[20000,20000] is smaller then 2GB but actually I cannot allocate even 700MB of memory. My limit is 650MB and I don't understand why - I have 32bit WinXP with 3GB of memory. I tried to use Marshal.AllocHGlobal(700<<20) but it throws OutOfMemoryException, GC.GetTotalMemory returns 4.5MB before trying to allocate memory. I found only that many people say use unsafe code but I cannot find example of how to declare 2-dim array in heap (any stack can't keep so huge amount of data) and how to work with it using pointers. Is it pure C++ code inside of unsafe{} brackets? Could you please provide a small example of working with matrices using pointers in unsafe code.

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• Have the default security settings changed in Windows 7 that would affect IPrincipal.IsInRole?

  - by adrianbanks

  We use NTLM auth in our application to determine whether a user can perform certain operations. We use the IPrincipal of their current Windows login (in WinForms applications), calling IsInRole to check for specific group memberships. To check that a user is a local administrator on the machine, we use: AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal); ... bool allowed = Thread.CurrentPrincipal.IsInRole(@"Builtin\Administrators") This works if the current user is the Administrator user, or is another user that is a member of the Builtin\Administrators group. In our testing on Windows 7, we have found that this no longer works as expected. The Administrator user still works fine, but any other user that is a member of the Builtin\Administrators group returns false for the IsInRole call. What could be causing this difference? I have a gut feeling that a default setting has changed somewhere (possible in gpedit), but cannot find anything that looks like the culprit.

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