c# - Pull to Refresh executing the Command only once -


i've scoured internet simple solution none seemed have had same problem me.

so explain briefly, i'm using xamarin forms , have listview:

<listview x:name="kpilist"            style="{staticresource customlist}"            hasunevenrows="true"            separatorvisibility="none"            ispulltorefreshenabled="true"            grid.row="1"            grid.column="0"            grid.columnspan="3"> </listview>

i defined refreshcommand , isrefreshing properties this:

public partial class mainpage : contentpage {     bool _isrefreshing = false;     public bool isrefreshing     {         { return _isrefreshing; }         set         {             _isrefreshing = value;             onpropertychanged(nameof(isrefreshing));         }     }      public icommand refreshdata;      public mainpage()     {         refreshdata = new command(repopulatelist);          kpilist.refreshcommand = refreshdata;         kpilist.isrefreshing = isrefreshing;     {      void repopulatelist()     {         isrefreshing = true;          controller.kpis.clear();         foreach (kpiobj kpi in await          webservices.getupdatedkpi(controller.savedkpiids))         {             controller.kpis.add(kpi);         }          isrefreshing = false;     } }

the strange thing first time pull refresh works fine. second time try, never enters block of code command set to.

it if listview "loses" pointer command after first pull refresh.

to make work need change this:

kpilist.isrefreshing = isrefreshing;

by

kpilist.setbinding(listview.isrefreshingproperty, nameof(isrefreshing));

in first 1 assigning value of isrefreshing of page property isrefreshing property of listview. changes omitted (as noticed).

note: if binding in xaml should work, need set bindingcontext in constructor of mainpage.

hope helps.-


Comments

Post a Comment

Popular posts from this blog

PHP and MySQL WP -

i trying accomplish 2 things here code. writing php directly wp page using insert php plugin. 1) query mysql database , return results 1 column 4 columns. 2) make each result own hyperlink directs user new wp page runs new query on page. i able query show results , turn results dynamic hyperlink, cannot formatting down. right returns result 1 column. here have: [insert_php] $servername = "localhost"; $username = "login"; //edited privacy $password = "password"; //edited privacy $database = "database"; //edited privacy // create connection $conn = new mysqli($servername, $username, $password, $database); // check connection if ($conn->connect_error) { die("connection failed: " . $conn->connect_error); } echo "connected successfully"; //get results database $result = mysqli_query($conn,"select mine mines order mine"); $all_property = array(); //declare array saving property //showing proper...
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

go - golang pprof for c library code -

i have been trying profile golang application pprof, seems details of c code(linked static library) missed in output result. flame graph from frame graph can see c code time consuming reported within "runtime._externalcode", no details @ all. , sure static library compiled debug enable. so there way make pprof details(like stack trace) of 3rd party c code? or there other golang profiling tool this?
Read more