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  • display data from tables that contain a null value

    - by user2631662
    I need the code below to say - if myReader reads a null entry a new method is called. At the moment it will not display data from tables that contain a null value conDataBase.Open(); myReader = cmdDataBase.ExecuteReader(); while (myReader.Read()) { if (myReader["Code_CodeID"] != DBNull.Value) { string sFirst = myReader["First"].ToString(); string sLast = myReader["Last"].ToString(); string sAdd1 = myReader["Address1"].ToString(); string sCode = myReader["Code"].ToString(); txtFirst.Text = sFirst; txtSecond.Text = sLast; txtadd1.Text = sAdd1; txtDeviceIMEI.Text = sCode; } } } else { //go to a new method } }

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  • Serialize object from within

    - by Maximus
    I have the class testClass which has the method save. This method saves object to a database. But it needs to serialize object before saving. How can I serialize object from within the class to do that? class testClass { private $prop = 777; public function save() { $serializedObject = serialize(self); DB::insert('objects', array('id', 'object')) ->values(array(1, $serializedObject)) ->execute(); } } serialize(self) obviously doesn't work.

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  • Is it poor practice to identify objects via an enumeration property, instead of using GetType()?

    - by James
    I have a collection of objects that all implement one (custom) interface: IAuditEvent. Each object can be stored in a database and a unique numeric id is used for each object type. The method that stores the objects loops around a List<IAuditEvent>, so it needs to know the specific type of each object in order to store the correct numeric id. Is it poor practice to have an enumeration property on IAuditEvent so that each object can identify itself with a unique enumeration value? I can see that the simplest solution would be to write a method that translates a Type into an integer, but what if I need an enumeration of audit events for another purpose? Would it still be wrong to have my enumeration property on IAuditEvent?

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  • How can I convert my Stream (image data) back into a file

    - by James Hay
    I have a WCF restful service that I'm trying to upload an image to. I have a very basic metod that accepts a stream as it's only parameter and is defined in the contract as: [OperationContract] [WebInvoke(UriTemplate = "ReviewImage", BodyStyle = WebMessageBodyStyle.Bare, Method = "POST")] ReviewImage UploadImage(Stream data); I'm actually consuming this service from flash (which is fairly inconsequntial) which selects a file from the file system and uploads it through the service url. It all works seems to work, adding a breakpoint to the UploadImage method breaks as expected. If I wanted to save this file back to disk, is it just a case of reading this Stream object into a FileStream object that creates the file somewhere? A bit like the this? When i do actually do this the file can not be opened as an image. I'm sure i'm missing a key piece of knowledge here. Does my stream actually contain just the image bytes or does it contain more than that?

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  • DDD: MailService.SendNotificationToUser() or User.Notify()?

    - by cfs
    I seem to stumble on problem after problem giving my entities behavior. I have a system where a user gets a notification when someone comments his article. Right now it is via an e-mail. I'm struggeling how to implement this the DDD way. Option 1 User entity has a Notify method: User.Notify() The method uses C# built in classes to send an e-mail notification via e-mail The problem with having this in the domain is that it is technology spesific, and how a user is notified might change in the future. I feel this belongs to infrastructure, but how then can a user have behavior? Option 2 I create a Service: NotificationService.Notify(User) The Service uses C# built in classes to send an e-mail The pro is that the service could be an Application Service, and as far as I know an application service can use the infrastructure and call things like the System.Net.Mail and repositories for that sake. How would you implement this?

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  • Rails Scope for association of 0 size.

    - by MissingHandle
    I'm having trouble figuring out the scope method for all the Foos that have no Bars. That is: class Foo < ActiveRecord::Base has_may :bars end class Bar < ActiveRecord::Base belongs_to :foo end I'd like to write a scope method that returns me all the foos that have no bars. Something like: class Foo < ActiveRecord::Base has_may :bars scope :has_no_bars, includes(:bars).where("COUNT(foo.bars) = 0") end But I don't understand the appropriate syntax. Any help? Happy to use a MetaWhere solution if easier.

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  • List in C# - passing multiple entries as a single object

    - by Karthick
    Hi, I have a method (C#) public void MethodName(List<Order> Order, int ID) I need to pass this to a main page, in which i know to pass integer value to ID, am not able to pass multiple items in a single list. The List order should have two number entries, (ie. Order.number1 and Order.number2) How should i pass a single list as a parameter to this method containing multiple entries of number1 and 2, so that i can loop thro' and find it. Thanks.

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  • Are instance initializers good or bad?

    - by berry120
    I personally quite like instance initializers - I use them to assign default values to things such as collections so when writing constructors I don't have to remember to assign them the same default values each time. It seems quite elegant to me - avoids annoying NPE's popping up and avoids duplicate code. A private method doesn't seem as nice because a) it can't assign values to final fields, b) it could be run elsewhere in code and c) the method still needs to be explicitly called at the start of each constructor. However, the flip side with others I have spoken to is that they're confusing, some people reading the code might not understand what they do or when they're called and thus they could cause more problems than they solve. Are proper use of these initializers something to be encouraged or avoided? Or is it an "each to their own" case?

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  • Unable to recieve file contents on server during upload

    - by Khushal
    Hello, I have a JSP page in which I have a file input field from which I browse a csv file and then upload it on server. I am using method = "POST" and ENCTYPE='multipart/form-data' in the form in which this file input field is present. On the servlet side(in the application's servlet) I am making use of apache's commom file upload API-ServletFileUpload API. After getting the FileItem list from the method parseRequest(request) of this API I am unable to get the file name and its content by using the methods getName(), getString() of FileItem API. Needed to know what am I doing wrong or any modifications in my approach that will make my application to work. Any pointers regarding this will be helpful. Thanks in advance!!

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  • how to create 2 controllers with same actionresult 2 views but one implementation

    - by amalatsliit
    I got a controller in my mvc application like below. public class BaseController: Controller { protected void LogInfo() { logger.InfoFormat("[SessionID: {0}, RemoteIP: {1}]", Session.SessionID, Request.UserHostAddress); } } public class FirstController : BaseController { public ActionResult Index(string name) { LogInfo(); getQueryString(); if(IsValidRec()) { if(Errors())) { return View("Error"); } var viewname = getViewName(name); return view(viewname); } else return view("NotFound"); } } I need to create another controller(SecondController ) with same ActionResult method that FirstController has but without any implementation. Because I dont wont to repeat same code in 2 ActionResult methods. what is the best way to do that. I tried in following way but I m getting error when I initialize my protected method 'LogInfo()' public class SecondController : BaseController { public ActionResult Index(string name) { var firstcontroller = new FirstController(); return firstcontroller.Index(name); } }

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  • Java Web Application

    - by Mark R
    I am interested in creating a simple web application that will take in user input, convert it to an XML file and send the file to a database. Coding wise I feel I am okay, it is just the general setup and what implementation to use I am a bit unsure of. At the moment I have a JSP page containing a form, the user fills out the form and on submit a get method is sent to a servlet, in the servlet doGet() method the servlet is instantiating a java object and passing it the user inputted data. The java object then writes that data to an XML file and sends it to the database via REST. All I would be interested to know is if this the standard/optimal way of creating such a web application. Any and all feedback is appreciated. Thanks

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  • Deleting files associated with model - django

    - by alexBrand
    I have the following code in one of my models class PostImage(models.Model): post = models.ForeignKey(Post, related_name="images") # @@@@ figure out a way to have image folders per user... image = models.ImageField(upload_to='images') image_infowindow = models.ImageField(upload_to='images') image_thumb = models.ImageField(upload_to='images') image_web = models.ImageField(upload_to='images') description = models.CharField(max_length=100) order = models.IntegerField(null=True) IMAGE_SIZES = { 'image_infowindow':(70,70), 'image_thumb':(100,100), 'image_web':(640,480), } def delete(self, *args, **kwargs): # delete files.. self.image.delete(save=False) self.image_thumb.delete(save=False) self.image_web.delete(save=False) self.image_infowindow.delete(save=False) super(PostImage, self).delete(*args, **kwargs) I am trying to delete the files when the delete() method is called on PostImage. However, the files are not being removed. As you can see, I am overriding the delete() method, and deleting each ImageField. For some reason however, the files are not being removed.

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  • Uploading video file to server from iPhone

    - by SshUser
    I know how to upload images to a server running PHP, but I am stuck on uploading video. I have used this advice to upload my video file. Posting method is all ok. What I get on the server is a file of 0 bytes. My code is below: - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL]; NSData *videoData = [NSData dataWithContentsOfFile:[videoURL path]]; } This videoData is passed in my POST method. What should I do instead?

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  • Static referencing error

    - by maxflow
    public class HelloWorld { public static void main(String [] args) { char[] b = {'a', 'b', 'a', 'c'}; int p = 4; deleteRepeats(b, p); } public void deleteRepeats(char[] a, int size) { int currentElement; currentElement = 0; do { for (int i = currentElement; i < size-1; i++) { if (a[currentElement] == a[i+1]) a[i+1] = ' '; } currentElement++; } while (currentElement < size-1); } } I get the error: non-static method deleteRepeats(char[],int) cannot be referenced from a static context deleteRepeats(b,p); Can someone tell me what this means? I tried removing "static" from the main method, but I get the error: Exception in thread "main" java.lang.NoSuchMethodError: main. Thanks in advance

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  • Similar Sub-Classes

    - by praks5432
    Lets say I have a class A that is fairly simple like this - public class A{ private int randomField = 0; protected int key; protected double dmg; } Now I want to write a number of sub-classes that inherit the protected fields and only differ based on the initial values that are assigned to those fields - for example, if I wrote two subclasses B and C, the only difference between those two sub-classes would be that the values key and dmg would have different values. They would share a method, set, which would be exactly the same, in that it would affect the same variable. I find when I'm writing these sub-classes I'm repeating myself, as I just change the constructor to set different initial values to key and dmg, and simply copy and paste the set method. Is there a 'good' way to do this?

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  • I can't upload a file with CGIHTTPServer

    - by sdemingo
    Hi all, I'm using the CGIHTTPServer to implement a simple cgi server. I'm trying to upload a file by a form with the post method and the multipart/form-data enctype but I have problems when I recover the value of the fields in the cgi script. When the script catch the form fields, the value of the file is a MiniFieldStorage with two fields only (key and file name), and I can't recover the content of the file. As the API doc shows, this content is in value field of a StorageField but in the MiniFieldStorage this field isn't exits. ¿How can I recover a StorageField with the content of the file instead a MiniStorageField? ¿There are other method to upload a file using CGIHTTPServer? Thanks a lot

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  • Android camera to take multiple photos

    - by user2975407
    problem.java public class problem extends Activity { ImageView iv; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.problem); iv=(ImageView) findViewById(R.id.imageView1); Button b=(Button) findViewById(R.id.button1); b.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent=new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(intent, 0); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // TODO Auto-generated method stub super.onActivityResult(requestCode, resultCode, data); Bitmap bm=(Bitmap) data.getExtras().get("data"); iv.setImageBitmap(bm); } } From this code I can only take one photo and it displayed in the screen. **But I want to take more photos nearly 5 photos and display in the screen** Further I want to add these photos to MySQL database.please help me to do that.I am new to android

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  • Way to kill python thread from inside thread?

    - by user859434
    I have some python code that currently performs expensive computation by performing the computation in parallel through many threads. For a given time period, many threads are created and started on the fly that share the same code which is explicitly stated within the run method of the thread. My question is how do I stop/kill a thread at the end of its run method? (the run is only called once) I need to do this in order to create more threads for the next batch of computation. #Example class someThread(threading.Thread): def __init__(self): #some init code def run(self): #Explicitly Stated Code without constant loops #Something performed to stop/kill this thread

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  • Trying to serialize and unserialze a Binary search tree to a file

    - by ClearMist
    I am trying to find a way to use these methods to save and restore a binary search tree that contains names and phone numbers in each node. I am just very lost and how to go about doing this. 'public void save(String fileName) { // TODO : implement this method. // save bst to its original shape. } public void restore(String fileName) { // TODO : implement this method. // restore bst from a file, if file exists. // do nothing, otherwise. File fichier = new File(fileName); if (fichier.exists()) { } }'

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  • Module.new with class_eval

    - by dorelal
    This is a large commit. But I want you to concentrate on this change block. http://github.com/rails/rails/commit/d916c62cfc7c59ab6411407a05b946d3dd7535e9#L2L1304 Even without understanding the full context of the code I am not able to think of a scenario where I would use include Modue.new { class_eval <<-RUBY def foo puts 'foo' end RUBY } Then end result is that in the root context (self just before include Moduel.new) a method call foo has been added. If I take out the Module.new code and if I only leave class_eval in that case also I will have a method called foo in self. What am I missing.

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  • Deleting the first occurrence of a target in aList [closed]

    - by Bandz Jooz
    /** Replaces each occurrence of oldItem in aList with newItem */ public static void replace(List<Student> aList, Student oldItemStudent newItem) { int index = aList.indexOf(oldItem); while(index != -1){ aList.set(index, newItem); index = aList.indexOf(oldItem); } /** Deletes the first occurrence of target in aList */ public static void delete(List<Student> aList, Student target){ Object o = //stuck here, dont know how to set up boolean stuff } } I figured out how to do the first method by looking up Java documentation, however I can't figure out how to finish my code for the second method even though I looked up the documentation which states: boolean remove(Object o) Removes the first occurrence of the specified element from this list, if it is present.

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  • Regarding Notify()

    - by user1334074
    I was going through threads and I read that ..The notify() method is used to send a signal to one and only one of the threads that are waiting in that same object's waiting pool. The method notifyAll() works in the same way as notify(), only it sends the signal to all of the threads waiting on the object.... Now my query is that if Lets say I have 5 threads and one main thread , so initially the main thread starts and then five other threads start , Now I want to send notification to third thread only , How could it be possible with the use of notify(), since here I am sending notification to third thread only , please advise.

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  • How to learn programming language (syntax rules, etc.) and remember easily? [closed]

    - by user239522
    I'm new to programming, and I always have a so call difficulty, that is, I always tend to forget the thing (syntax, rules, name, definition or anyting) of a programming language I've learnt. And I personally do feel that the way I learn it is wrong. Here is my method. Everyday I will spend approximately 1 or 2 hours on a programming e-book. I just follow the syllabus and teaching inside the books, of course I have try to code myself, alter the code inside the book, and did the exercises available. But everytime right after I finish a chapter and advanced myself to third or fourth chapter, I will forgot something I learnt in the first chapter. Is it the method I use wrong? Does learning through reading and coding not enough? Do I need to everytime make a small note (mind map for example) of things I've learnt by hand writing? Or do I sometime need to try coding using a pencil and a book, but not a computer?

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