c# - OOP interaction with database -

-

if object oriented programming focused on objects, consist of methods , data, best oop-focused approach working databases, using c#?

for example, want log using c# classes, , record logs in sql table. other factors being neutral, more "proper," object-oriented speaking, do:

  • create class what's being logged, , include methods database access
    (the methods tied closely data)

    public class activity {     public string activityproperty { get; set; }      public void sqlmethod1() {}      public void sqlmethod2() {} }

...or,

  • create class what's being logged, , create class database access
    (methods not closely tied data, way data accessed treated object, i.e. referencing ef or orm)

    public class activity {     public string activityproperty { get; set; } }  public class sqlmethods {     public string sqlproperty { get; set; }      public void sqlmethod1(activity activityparam) { }      public void sqlmethod2(activity activityparam) { } }

...or, perhaps better design more "object-oriented"?

generally speaking, prefer not put database access logic classes because hinders ability use them in other scenarios in data access not required. think second option more flexible one.

however, if aware of orm solutions such entity framework, suggest using 1 of those. ef takes approach closer second 1 in use pocos (plain old c# classes) , other ef classes take care of moving data objects database , back.

so overall suggestion use entity framework code first methodology.


Comments

Post a Comment

Popular posts from this blog

java - Custom OutputStreamAppender not run: LOGBACK: No context given for <MYAPPENDER> -

-
i wish write custom appender on basis of outputstreamappender . wrote following class package tests; import java.io.ioexception; import java.io.outputstream; import ch.qos.logback.core.outputstreamappender; public class myappender<e> extends outputstreamappender<e> { public myappender() { system.out.println("myappender created"); setoutputstream(new outputstream() { @override public void write(int b) throws ioexception { throw new unsupportedoperationexception(); } }); } } then wrote following runner: package tests; import org.slf4j.loggerfactory; import ch.qos.logback.classic.logger; public class runner { private static final logger log = (logger) loggerfactory.getlogger(runner.class); public static void main(string[] args) { //log.addappender(new myappender<iloggingevent>()); log.info("hello world"); } } finall...
Read more

java - UML - How would you draw a try catch in a sequence diagram? -

-
Image
is there standard way of drawing try catch sequence diagrams? i've made attempt based on this feel end result doesn't feel right. code diagram based around: public static void save () { try { filehandle filehandle = gdx.files.external(file); filehandle.writestring(boolean.tostring(constantshandler.soundenabled)+"\n", false); (int = 0; < 5; i++) { filehandle.writestring(integer.tostring(constantshandler.highscores[i])+"\n", true); } } catch (throwable e) { } } my attempt note: know still need add loop. that's ok. fragments meant show conditional control flow in sequence diagram. superstructures puts limitations on use of fragments (see pp. 467 of ss2.1.1). should use critical region try part above. , option catch . however, keep telling can take quite freedom in using uml. it's language , such changes in life time. long reader ge...
Read more

c++ - No viable overloaded operator for references a map -

-
i trying use map can make tag names reference number. when try , use it, in code error (6 in total every time reference map): src/main.cpp:25:45: error: no viable overloaded operator[] type 'std::map<std::string, std::string>' const char* idcs = node.child_value(tagmap[3]); this code: #include "pugi/pugixml.hpp" #include <iostream> #include <string> #include <map> int main() { pugi::xml_document doca, docb; std::map<std::string, pugi::xml_node> mapa, mapb; std::map<std::string, std::string> tagmap {{"1", "data"}, {"2", "entry"}, {"3", "id"}, {"4", "content"}}; if (!doca.load_file("a.xml") || !docb.load_file("b.xml")) { std::cout << "can't find input files"; return 1; } (auto& node: doca.child(tagmap[1]).children(tagmap[2])) { co...
Read more