Questions tagged as 'c#'

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I want to fill a listview in Xamarin Android from a mysql server

As the title says, I need to fill a Listview from a mysql database, I have read and I was recommended to use JSON for a security issue, if someone gives me a tutorial link or explains how to do it (what programs should I use , etc) step by step...
asked by 03.07.2018 / 05:07
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.Net - C #: Entity Framework Querys complexes

Greetings to all. I am starting to study Entity Framework and I have had a couple of questions: With the traditional approach of ADO.Net I can create queries or complex queries, that is, make use of INNER JOIN, LEFT JOIN, of functions such...
asked by 03.07.2018 / 00:58
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The database is not created using entity framework

Basically I followed all the steps as I understand how you can see this is the DBContext that I have created. namespace MODELO { using System; using System.Data.Entity; using System.Linq; public class Ouroboros : DbContext...
asked by 04.07.2018 / 08:32
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Doubt with application on second screen C #

My question is, if it is possible to have an application developed in C # on the second screen (in extended screen) and that this application detects the pressure of a key, for example, the + key to execute a process, while occupying the program...
asked by 03.07.2018 / 00:15
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Save a data in a sql table

I have a dilemma with a webpage project that I am doing. You see, it is a record of certain products sold, creating invoice type, then I need a folio. The folio that will be assigned by default to each user will be 1, the number will be saved in...
asked by 04.07.2018 / 14:37
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Check Record in BD (ASP.NET MVC 5)

I would like you to help me to create a method that validates if there is already a record in BD with the name of the user that is authenticated and that this one returns a Boolean and sends it to the view to be used with JavaScript. Th...
asked by 04.07.2018 / 13:54
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Request error to the server when clicking on an ASP.Net C # image

I show some images on a page that when I clicked it returns the error:    "Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was...
asked by 04.07.2018 / 14:38
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How can I send data from a datagrid that is linked to an access database to another data grid?

I want to send that data grid data to a sql table but it sends me an error when doing direct because that grid is already linked to access. if you could help me sending that data to another grid or if you can tell me how I can do it directly fro...
asked by 06.07.2018 / 16:33
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How to validate the value of a parameter in the routes?

I am programming in asp mvc with c # and I have an action declared as follows: public FileResult ViewImage(int ImageFileItemId, int MaxWidth, int MaxHeight, bool FixedWidthHeight, string JpegQuality) . I would like to validate that t...
asked by 02.07.2018 / 15:49
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Work with ISO8583 .NET messages

I need to work with ISO8583 messages to exchange packages between financial entities. I was studying how this protocol works, however, I have not been able to find whole examples of how this message should be put together. I know the struc...
asked by 02.07.2018 / 16:34