Trim transparent whitespace from Image

Visual C# General

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  - 1
    - Still Active Though Log Off What do you mean with Remote Log On If you want your application to always run you can create a Windows Service . Then that service can listen for incoming remote or local connections from clients. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 2
    - OnClientClick Priority? you can change"<input type='submit' >" to "<input type='button'>" if the button's type is "submit",it will submit the data to server.so other feilds will be clear! Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 3
    - where to find static definitions Your methods must be static also, so; public object [,] DataTable2ObjArray( DataTable _dt) should be public static object [,] DataTable2ObjArray( DataTable _dt) That should fix your problems. theTroll Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 4
    - Math with datetime?? These "age" problems are more complex than they appear on the surface. To just handle the "years" part, consider this method: Code Block // Returns the number of complete years (age) between d1 and d2. public static int CalculateAge( DateTime d1, DateTime d2) { int years = d2.Year - d1.Year; DateTime anniversary = new DateTime (d2.Year, d1.Month, d1.Day) + d1.TimeOfDay; if (anniversary > d2) years -= 1; // Check if did not yet reach the anniversary DateTime. return years; } By months and days, you need to define what "months and days" mean: not all months have the same number of days. You could easily adapt the above to find year and days: int days = (d2 - anniversary).Days; Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 5
    - Error code: 0xe0434f4d You're not running it from a file on the network are you, by any chance If so, try copying it to a local drive and run it from there. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 6
    - app.config or settings.settings No they aren't. App.config is the application configuration file and is part of the application itself. settings.setting is a source file that is eventually compiled into code. Settings that are defined in the project property pages are stored in app.config and the user configuration file at runtime. App.config contains the read-only default values whereas user changes are normally stored in user config. The settings.setting file will never be deployed. If you look at the file you'll find a class that exposes each of the settings you define as properties off a settings class to make settings easier to use. However the code becomes part of the assembly during compilation. Note that app.config gets renamed to applicationname .exe.config before running. Michael Taylor - 12/28/06 Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 7
    - closing app probs Usually closing the form will be enough but if you have started multiple message loops by calling Application.Run() you usually can make all message loops end by calling Application.Exit(). This might not be the solution for you but to help you further you need to give more details about your app and how you do to exit it. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 8
    - calling an executable from within running app You just have to call: Code Snippet System.Diagnostics.Process.Start("foobar.exe"); Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 9
    - Best way to marshal an array of C style strings The SizeConst would have to be set to 7 * 30 = 210. You then have to split the string into pieces of 30 characters. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 10
    - How can I control already open IE windows? Hi Brene The answer is "yes" and it requires API calls and SendKeys <shudder>. I've written code that does this before: I'll try to dig it up and distill it into a short sample for you. It's not elegant, but it works. -Jeff Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 11
    - How to make a tabpage invisible from user? this.tabControl1.TabPages.Remove(this.tabPage2); Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 12
    - VB6 ActiveX Dll Problem ! Hi, Since VB6 is all about COM, you can have Visual Studio do all the work of creating a runtime-callable-wrapper (RCW) for your VB6 dll: Simply add a COM Reference to this dll to your project by using the "COM" tab on the "Add Reference" dialog Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 13
    - Add a Menu to the IDE At a minimum you will need to write a VS add-in. The project template ships with VS but you might have to have Pro or higher to get it. There are plenty of articles online on how to do it. The project template itself will create a menu item under Tools so it shouldn't be too hard to figure out. You basically just have to set up your menu structure when the add-in is set up in VS and then handle the command when the menu is used. Michael Taylor - 6/10/07 http://p3net.mvps.org Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 14
    - How to check whether the system is 32 bit or 64 bit ? You can find out using IntPtr.Size (static method) Try the following link http://blogs.msdn.com/kstanton/archive/2004/04/20/116923.aspx Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 15
    - how to call a function of another class Make sure the class and method scope is accessible to the caller. If both classes are in the same file you don't need to make dog public but you need tomake method woof() either public or internal. Code Snippet class Main { cow cow = new cow(); dog dog = new dog(); void mainMethod() { dog.woof(); } } public class dog { public void woof() { Console.WriteLine("woof woof"); } } Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 16
    - Please help me with C# code Since n is an integer the calculation is done as an integer and then is stored in a double. This causes it to round off to 3. To fix this your code should look like this. Code Block using System; public class Pi { // Main method begins execution of C# application public static void Main( string [] args) { double pi = 4.0; for ( int n = 1; n <= 100; n+=4) { pi = pi - (4.0 / (n + 2.0)) + (4.0 / (n + 4.0)); Console .WriteLine( "{0,4}" , pi); } } // end method Main } // end class Pi Tag: Visual C# General Trim transparent whitespace from Image Visual C#
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  - 1
    - The process cannot access the file **HARD ONE** I assume you're creating an Image instance for the PictureBox by using the Image.FromFile() method Image also has a FromStream() method. So one option would be, instead of simply creating the Image using FromFile(), open the file yourself, read it into a MemoryStream, and then close it. You can then use Image.FromStream(MemoryStream) to create the image for the PictureBox, while leaving the file unlocked and able to be overwritten. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 2
    - web parts deploying problem Hi, Your thread is more appropriate in asp.net forum and there you may find satisfactory answers. Thank you. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 3
    - Reflection For Class Look at: Type.GetType / Assembly.GetType Activator.CreateInstance Type.GetMethod / MethodInfo.Invoke Whether this is a good idea or not is dubious though; reflection is slow and resource intensive, and if you do this you'll lose the ability to refactor your code because class names will be hard coded. If you're trying to achieve an IoC pattern you might be better off checking out something like the Spring .NET framework. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 4
    - Navigation from one form to another in Windows applications (C Sharp) What exactly do you mean by "navigate" Normally, an application will keep the original form open and show the new form as an additional window (modal or modeless). This is appropriate for example, with many options dialogs. To transfer data between the forms, expose properties and methods in the forms and call them as needed. If you want to hide the original form after showing the new one, you can call the Hide method. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 5
    - Which Namespace contains NullToString ? There is no such thing as nulltostring. Best guess, it looks something like this: private string NullToString (string s) { return (s== null) "" : s; } Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 6
    - Format CSV using C# csv is just coma delimited plain text file. if the field contains coma, you cna use double quote around it. such as: 1024, "test, another test", nothing so basically you need to parse/write such format. if there's no ',' coma in your fields, it's just trivial. you can read each line, use string.split(',') to get all fields into string[] then you can use StreamWriter.Writeline(string.format("{0},{1},{2},{3},{4}",fields[0],fields[3],fields[5],fields[4]) to convert the 6 fields to 5 fields as you presented above. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 7
    - Back/Forward buttons Hi, The web browser control provides a couple of methods and properties that help create forward and back buttons... webBrowser.GoForward() webBrowser.CanGoForward //boolean property webBrowser.CanGoBack webBrowser.GoBack() Use these methods in the click event of your toolstrip buttons ! Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 8
    - IO Exception when Deleteing a File hi paul, it is not only happen to image file type, i faced this before also. how you collect the ThumbnailInfo you read from the image if like this the program that you run are using the image, so a file which are using cannot be remove/delete. because our program are running too fast so even the program finish reading that image, in memory that image haven't be released. so maybe u can try to "Sleep()" a while. that how i solve this problem :) maybe not so profesional...but it work without any error... :) Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 9
    - Creating Sequental filename. If uniqueness is your goal, I would suggest PInvoking the GetTempFileName function. It lets you specify a prefix to use to generate a unique filename. The PInvoke signature would look something like: Code Snippet [DllImport("kernel32.dll", CharSet=CharSet.Auto, SetLastError=true)] internal static extern uint GetTempFileName(string tmpPath, string prefix, uint uniqueIdOrZero, StringBuilder tmpFileName); Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 10
    - Initializing base class with a child class instance Assigning a child class to a base class is useful when you are going to use polymorphism. Imagine that BaseClass has a virtual method "TheMethod", which is overidden in ChildClass. if you were to invoke obj.TheMethod, you would execute the method in ChildClass instead of the one in BaseClass. This is frequently used when you write a flexible method that is designed to work with a base class. For instance, tha class XmlDocument in the .Net framework has a method Save(Stream s). You can create a MemoryStream (which is a child of Stream) and pass it to the Save method. When Save calls the Write method on the Stream, it executes the Write in MemoryStream, thus saving the XmlDocument to its intended destination, without any need for the developers of the XmlDocument class to know anything about MemoryStreams or other child classes of Stream. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 11
    - unique song identifier from an mp3 This doesn't quite answer your question, because it does require the internet - but if you use the "genpuid" app from the MusicDNS downloads, you won't have the same issues getting the c++ library to run with C#. You just need to be able to invoke an external process, and parse the resulting output as XML. If not using the net isn't a strict requirement, that may be good enough for you. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 12
    - Visual Studio 2005 Standard vs Professional You should consider buying professional if you intend to write commercial code. The benefits outway the cost ($400 difference). The big differences in my mind are: XSLT support and debugging if you are doing a lot of XSLT work SQL Server 2005 integration support SQL Server 2005 Developer edition (has all features of Enterprise) Full UI rather than stripped down version Database project support Image library Of course if you don't ever intend to do DB work then most of the features of professional will be lost. Michael Taylor - 1/17/07 http://p3net.mvps.org Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 13
    - Get the installation location of a assembly through c# Hi Arwin, This forum is to support development on the Microsoft Office Live application platform. It is not for support of any of the Office 2003 or 2007 client applications such as Excel, Word or Outlook, unless your question is related to how the client apps interact with Office Live. Please refer to the list of newsgroups and forums for Microsoft Office if you need help with any of those applications. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 14
    - dll decompile You have a pretty bad issue with this programmer. This might be a great time to change your business policies. Search google, lot's of them exists. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 15
    - Process: VirtualMemorySize64 Question Hi, the virtual addresses in the process space are translated to physcial addresses by the Operating System, they are not guaranteed to stay the same over time as pages of memory are paged out and back in. Also just because your process is in theory given a certain amount of memory does not mean you can actually use all that, since when it is mapped to physical addresses it is most likely not contiguous most of the time. If you tried to alocate something that requires contiguous memory, such as an array, say of 400MB, that may fail even though you have more non contiguous memory available to you. What problem are you trying to solve Mark. Tag: Visual C# General Trim transparent whitespace from Image Visual C#
  - 16
    - How can I create an empty XmlElementString with XmlWriter Try something like this XmlTextWriter tw = new XmlTextWriter (filename, null ); tw.Formatting = Formatting .Indented; tw.WriteStartDocument(); tw.WriteStartElement( "" ); // This should make an empty element... Tag: Visual C# General Trim transparent whitespace from Image Visual C#

MMike

I would like to trim the alpha whitespace from an existing Image (read from a png). For example: A big transparent image with a small solid circle somewhere shall be trimmed down to a rectangle bearing the circle.

Is there some high level method I can use

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Re: Visual C# General Trim transparent whitespace from Image

Peter Ritchie

You'd probably have to use edge detection to find a bounding rectangle for the area you want to crop. It's a rather complex task. http://www.umiacs.umd.edu/~hankyu/shape_html/ is a paper on using edge detection to find shapes in images.

http://www.codeproject.com/cs/media/edge_detection.asp df=100&forumid=3567&exp=0&select=1227293 might be useful.

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