Posts by ZelDias • 469 points
21 posts
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viewsA: Migrations error loading System.Configuration.Configurationmanager - Migrations
To create Migrationsnot only do "start", there are some steps you should follow, before you have to contain in the project the code needed to work with Migrations: public class…
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viewsQ: Bufferedreader always returns null
Although some questions already exist with similar subject matter, I could not get an exact answer, so I turn again to Stack. I’m developing a client-server system, I already had the project…
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viewsQ: Error: Could not find or load main class Mainex1"
Previously questioned question that gave basis to this error The error in question is the use of a JAVA program using the Linux Terminal. I already have the compiled classes, the error appears when…
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viewsQ: Error: "Cannot find Symbol" - Class Instance within Main Class, using Linux terminal
I have an exercise to solve, which consists of creating a simple Java language calculator. I have to send the two numbers through Terminal as arguments to my program. I am using the following build…
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viewsQ: Error reading if. arff file exists or not
I am developing a robot in JAVA along with the Robocode framework and WEKA. Whenever I try to check if the file ". arff" exists, always gives me the same mistake. Round 1 initializing.. Let the…
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viewsQ: "Method Not Found" and "Method Not Allowed" using Webapi and POST
I am developing a picking software, where the user from a sales order (order) creates a picking list (which contain the products that the warehouse employee will pick up for later transport to take…
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viewsQ: White at the bottom of the screen with Scrollview
I put a ScrollView in one of my layouts, to allow users with smaller screens to view all information. The problem is that when I start the application on my mobile phone (5.5') I see a white band…
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answer248
viewsQ: Update a textview for a few seconds
I wanted to implement a transition between two Activitys, where the user, via a Progress Bar (I already implemented) and a textview where every 2 seconds, a new phrase appears to me, for example:…
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viewsA: Attempt to invoke virtual method android.database.sqlite.SQLiteDatabase.rawQuery(java.lang.String, java.lang.String[])' null Object Reference
Before using the cursor, try placing a check like this (a way around the error, but does not resolve it) if(cursor != null && cursor.moveToFirst()) If it keeps going wrong, I think it has to…
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answer223
viewsQ: Only print the first element of Arraylist
My problem right now is to print the various elements that are inside an Arraylist I created. How my app works is as follows:: I use a Cursor, and I will fetch the table information from the…
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viewsA: Android - How to make Navigationdrawer items clickable?
I am currently creating an application with Navigation Drawer. Mine is customized, I don’t know if it will be the same as yours, but here it goes: ACTIVITY @Override protected void onCreate(Bundle…
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viewsQ: Two Layouts.xml for the same Fragment, is it possible?
My question is this:: It is possible to use two layouts in one Fragment? The context of my doubt, is the following: I wanted a form, where the user entered several information, only I can not put…
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viewsQ: Is it normal to pass null variables from the client side to the service side?
My goal is to create three applications: in WCF, in ASP.NEW Web API and another in WPF. My question is this:: It is normal, the data that we initialize on the client side namely (WPF) and that we…
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viewsQ: Initialized but Null Vector
I’m going crazy with a simple piece of code. My application, serves to give information to use on a route. I add several cities, and then try to add to the vector, but in the end the vector is…
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viewsQ: No string in an array with Bufferedreader
I am developing an application that allows the user to enter two cities and then check an array with the existing "Cities", if those that the user enters exist. The problem is when I try to read the…
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viewsQ: Android - String and varchar comparison
I’m having trouble comparing strings. A retreat of a Edittext and the other of an SQL table. The app is a game like "Who wants to be a millionare?" When it comes to the if cycle of comparison…
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answer213
viewsQ: C - Is it possible to insert a matrix into a structure?
A question that came to me a few days ago, was whether it is possible to insert a matrix into a structure, I think so, but on the road of doubts I decided to clarify. EXAMPLE typedef struct…
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viewsQ: Problem with null variable
I’m developing software in C# with MVVM model, and with Visual Studio. It is a software to manage the members of a university. We must also use a database, with Code First. My problem is it gives me…
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viewsQ: Vector Comparison Problem - Java
I have a problem with a simple code in Java, I just started learning the language. The exercise consists of comparing the values of the vector to see if there are repeated elements. The problem is,…