c# - Pass parameters to WebClient.DownloadFileCompleted event -

i using webclient.downloadfileasync() method, , wanted know how can pass parameter webclient.downloadfilecompleted event (or other event matter), , use in invoked method.

my code:

public class myclass {     string downloadpath = "some_path";     void downloadfile()     {         int filenameid = 10;         webclient webclient = new webclient();         webclient.downloadfilecompleted += dosomethingonfinish;         uri uri = new uri(downloadpath + "\" + filenameid );         webclient.downloadfileasync(uri,applicationsettings.getbasefilespath +"\" + filenameid);      }      void dosomethingonfinish(object sender, asynccompletedeventargs e)     {         //how can use filenameid's value here?     }  } 

how can pass parameter dosomethingonfinish()?

you can use webclient.querystring.add("filename", yourfilenameid); add information.

then access in dosomethingonfinish function,

use string myfilenameid = ((system.net.webclient)(sender)).querystring["filename"]; receive file name.

this code should like:

string downloadpath = "some_path"; void downloadfile() {     int filenameid = 10;     webclient webclient = new webclient();     webclient.downloadfilecompleted += new asynccompletedeventhandler(dosomethingonfinish);     webclient.querystring.add("filename", filenameid.tostring());     uri uri = new uri(downloadpath + "\\" + filenameid);     webclient.downloadfileasync(uri,applicationsettings.getbasefilespath +"\\" + filenameid);  }  void dosomethingonfinish(object sender, asynccompletedeventargs e) {     //how can use filenameid's value here?     string myfilenameid = ((system.net.webclient)(sender)).querystring["filename"]; } 

even if should work, should using unity's unitywebrequest class. haven't heard should like:

void downloadfile(string url)  {      startcoroutine(downloadfilecor(url));  }   ienumerator downloadfilecor(string url)  {      unitywebrequest www = unitywebrequest.get(url);       yield return www.send();      if (www.iserror)      {          debug.log(www.error);      }      else      {          debug.log("file downloaded: " + www.downloadhandler.text);           // or retrieve results binary data          byte[] results = www.downloadhandler.data;      }  }