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• Is checking for exceptions in code or using try-catch a better practice in Java?

  - by badpanda

  I had someone mention to me that catching all exceptions is not necessarily good practice (for example, NullPointerException). I am looking for an explanation of when this is a good thing, when it is not, and why it is as such :D Thanks!! badPanda

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• What is a simple way to create a text field (or such) that only allows the user to enter ints/double

  - by badpanda

  I am looking for a way to ensure that my text field (JTextField, JFormattedTextField) is returning a double or int rather than a string when I call .getText(). What is the best way to do this (if possible)? Thanks! badPanda :D

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• Is there a built-in class to handle encryption in C#?

  - by badpanda

  I need to encrypt bytecode to send over a connection to a webservice, preferably using a GUID as a key. I have done a bit of research and found several classes developed for a similar purpose, but haven't been able to turn up much that is built into the Windows libraries. My question is: Is there something built in to C# that performs this task? If there is not, I would very much appreciate any suggestions as to implementation. Thanks!! badPanda

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• Writing a windows web service and not sure what language to use?

  - by badpanda

  So I am required to write a fairly basic Windows service and have never done so before. Of C#, C++ (the Visual Studio suite), what is the best language to develop in? I am a student, and am most familiar with OO languages such as Java. Additionally, if anyone can recommend any books, articles, or google searches that would be relevant to the project I would greatly appreciate it. Thanks! badPanda

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• What is the easiest way to output only a certain number of digits after a decimal place in a JTextCo

  - by badpanda

  I am using both JLabels and JTextFields, and need to be able to truncate my doubles to two decimal places when they are outputted to the application. What is the easiest way of doing this (preferably without switching to JFormattedTextFields)? Thanks, badPanda :D

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• Can NotifyIcon.ShowBalloonTip in C# be customized?

  - by badpanda

  Purely out of GUI vanity, I would like to make my task bar tool tip less...well, less "I wear a suit and work at Microsoft"-y. I can't seem to find a setting to do this, but I know that this particular function is relatively new so if anyone knows of a way to change the balloon look and feel I would very much appreciate a link or suggestion! Below is my code: public static void shutdownWarning() { ToolTipIcon tipIcon = new ToolTipIcon(); tipIcon = ToolTipIcon.None; TaskBarIcon.getInstance().mNotifyIcon.ShowBalloonTip(100, "", "Sending. Please do not shut down.", tipIcon); } Cheers!! badPanda

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• Would watching a file for changes or redundantly querying that file be more efficient?

  - by badpanda

  I am wondering whether watching a file/directory for changes using the FileSystemWatcher class is extremely memory intensive. I am developing a desktop application in C# that will be running behind the scenes continuously on low-performance computers, and I need some way of checking to see if various files have changed. I can think of a few solutions: Watch the directories using FileSystemWatcher. Run a timed thread on an interval that goes through and manually checks this. Check manually every time the actionhandler thread runs (the program will occasionally do something, on an action). Any suggestions? Thanks! badPanda

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• What is the easiest way to loop through a folder of files in C#?

  - by badpanda

  I am new to C# and am trying to write a program that navigates the local file system using a config file containing relevant filepaths. My question is this: What are the best practices to use when performing file I/O (this will be from the desktop app to a server and back) and file system navigation in C#? I know how to google, and I have found several solutions, but I would like to know which of the various functions is most robust and flexible. As well, if anyone has any tips regarding exception handling for C# file I/O that would also be very helpful. Thanks!!! badPanda

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• How to use application config file in C#?

  - by badpanda

  I am trying to use a config file in my C# console application. I created the file within the project by going New -- Application Configuration File, and naming it myProjectName.config. My config file looks like this: <?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <add key="SSDirectory" value="D:\Documents and Settings\****\MyDocuments\****" /> </appSettings> </configuration> The code to access it looks like this: private FileValidateUtil() { sSDirFilePath = ConfigurationSettings.AppSettings["SSDirectory"]; if (sSDirFilePath == null) Console.WriteLine("config file not reading in."); } Can anyone lend a hint as to why this is not working? (I am getting the error message.) Thanks!! badPanda

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• How to delay shutdown of an application when user logs off or shuts down Windows?

  - by badpanda

  I am writing an application that runs in the background from startup to shutdown, and in some circumstances I need the application to display a dialogue for the user to choose whether or not to continue shutting down. This application will only be running on Windows, but may be running on any version from 2000 onward. While I have certainly done some research on the topic, the information regarding the way that windows handles application shut down (http://msdn.microsoft.com/en-us/library/ms700677(VS.85).aspx) seems to be a bit scattered. If anyone has an example of the best way to handle this, or additional knowledge regarding the topic, I would very much appreciate it (I have very little experience with C#). Thanks!! badPanda

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• How to add ONLY system tray icon to application?

  - by badpanda

  I am developing an application that will be running behind the scenes in Windows and would like to put an icon in the system tray for troubleshooting purposes (simple way for users to tell if the app is running). There is no other UI for the application, and the icon does not need to have any functionality as of right now. All of the solutions I have found as of yet involve creating a form. I am wondering if there is a way to simply add a class to my current C# code that allows me to control the icon, rather than doing the whole 'make a form, set it to be invisible....' nonsense that seems to be the popular suggestion on the forums. Something along the lines of the way that UI control is done in say, Swing for Java. I would really appreciate any ideas! (Sorry if this is a n00b question...I haven't used C# before...) Thanks! badPanda

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• Looking for open-source, free alternatives to Rational Rose (UML Modeler)?

  - by badpanda

  I am looking for a relatively bug-free, small learning curve data modeler that allows creation of UML diagrams. Prof recommended Rational Rose...but I don't want to pay for it. Could run on Linux or Windows... Any suggestions?

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• Having a problem getting my ActionListeners, Handlers, and GUI to communicate.

  - by badpanda

  So I am trying to get my GUI to work. When I run the code below, it does nothing, and I'm sure I'm probably just doing something dumb, but I am completely stuck... public void actionPerformed(ActionEvent e){ UI.getInstance().sS++; if((UI.getInstance().sS %2) != 0){ UI.getInstance().startStop.setName("STOP"); UI.getInstance().change.setEnabled(false); }else if(UI.getInstance().sS%2 == 0){ UI.getInstance().startStop.setName("START"); UI.getInstance().change.setEnabled(true); } } public void setStartListener(StartHandler e){ this.startStop.addActionListener(e); } sS is an int that increments every time the button startStop is clicked. change is also a button.

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• How to handle when SSRS does not automatically update fields based on database query?

  - by badpanda

  So I am trying to change the number of fields in my dataset in SSRS and the refresh button is not picking up the added field from the SQL server. The query is definitely returning the correct data, as I have double checked in the server engine itself. Also, I have tried manually adding the field using the SSRS menu, but as soon as I execute it disappears. Any suggestions or similar experiences?

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• "Invalid Column Name" error thrown by Access Reports?

  - by badpanda

  I am attempting to sum over a detail grouping on a specific field in Microsoft Access, and assign that sum to a field in the general grouping. When I try to run the report, I get an "Invalid Column Name" error with the detail field getting the error. Has anyone previously encountered this? If so, any ideas what might be causing it or how to solve it?

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