c# - Pass variable from event handler to another method -


i working on .net application gets message serial port (arduino) received event handler. unable pass message stored event handler method. event handler receives data looking this:

private static void messagereceivedhandler(object sender, serialdatareceivedeventargs e) {     serialport serialport = (serialport)sender;     string received_data = serialport.readexisting(); // pass received_data method }

i want received_data variable passed method named getmessage(). method execute operations using received data returned. getmessage() called class, these operations can not implemented in event handler.

edit : sorry, missed important point here. want received_data available in getmessage without getting parameter. because class needs access getmessage without (out output_data) parameter.

public bool getmessage(out output_data) {     bool success = true;     // part not understand how implement     string input_data = received_data;       try{          // operations input_data (which data event handler).     } catch (exception e)     {         console.writeline(e.tostring());         succcess = false;     }      output_data = input_data;     return success; }

i assume possible have received_data global variable , read/write accordingly. however, not approach, advice in order find solution.

since don't want use received_data parameter believe best choice global variable. can still use parameters if problem need method being called somewhere else. more complicated way method used parameters:

    public bool getmessage(out output_data, string received_data, bool receiveddataneeded) {     bool success = true; if(receiveddataneed){         // part not understand how implement         string input_data = received_data;     try{      // operations input_data (which data event handler).     }catch (exception e){     console.writeline(e.tostring());     succcess = false;     } }else{     string input_data = "whatever need initialize to";     try{      // operations input_data (which data event handler).        } catch (exception e){          console.writeline(e.tostring());          succcess = false;        } }         output_data = input_data;         return success; }

when call getmessage handler can call this:

getmessage(output_data, received_data, true);

when want call somewhere else don't need received_data parameter can call this:

getmessage(output_date, "", false);

Comments

Post a Comment

Popular posts from this blog

angular - Ionic slides - dynamically add slides before and after -

hi i'm using ngfor create set of 3 slides while starting in middle i'm guaranteed able slide left or right on start. when slide right can simple listen reachedend , push slide array i'm looping. but have problem adding slide beginning. if same above , use e.g. array.unshift() or spread add item beginning, view think it's on position 0 , snaps view new slide. the code below work animates slide change index 1. slide = [0,1,2] //example loop slidechanged(event) { if(this.slides.isbeginning()){ this.slide = [this.slide[0]-1, ...this.slide]; this.slides.update(); this.slides.slideto(1) } } <ion-slides [initialslide]="1" (ionslidedidchange)="slidechanged($event)"> <ion-slide *ngfor="let item of slide"> <h1>slide {{item}}</h1> </ion-slide> </ion-slides> any appreciated! you can using ionslidenextend , ionslideprevend events slides . please
Read more

minify - Minimizing css files -

i want know how css files can minimized. currently, using external sites css minifier compress css files. however, after removing whitespaces, comments, etc, file sizes reduced 10-15%. how frameworks bootstrap manage make minimized versions kilobytes. as example, css is: body { background-color: #ff0; } the reduction goes 28 bytes 22 bytes other css files have lot more characters still smaller this. actually minifying code means it's remove thing code white space characters new line characters comments block delimiters it reduces amount of code has transferred on web , speed site load fastly.but unreadable format.
Read more

Add a dynamic header in angular 2 http provider -

i have http interceptor built via tutorial https://scotch.io/@kashyapmukkamala/using-http-interceptor-with-angular2 the problem need have dynamic header changes automatically once changes 'mode' in app. service able tell interceptor change header, or have interceptor pull header (which string)from service each request. able throwing away patch method, call http.patch('new header string') set header string. call in service controls 'mode' setting. wondering if there way interceptor pull recent value service each request or if can add method http provider via interceptor? i've tried call service in interceptor each request returns undefined. because creating new instance of service or copying value before service fired , loaded/changed data. i don't want pass header string every http provider call because defeats purpose of having interceptor, id able set once changes or have provider fetch service before makes request. tl;dr : need add autom
Read more