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1 answer
162 views

Hi i'm using trial Ver and when i bind DataGridTextColumn to Arabic letters

its show Arabic with left to right  on UWP 

And Unknown Format on Android

Its show correctly when editing
screenshot attached

Didi
Telerik team
 answered on 14 May 2019
1 answer
118 views

i cant find  SelectedValuePath Property  in DataGridPickerColumn 

https://docs.telerik.com/devtools/xamarin/controls/datagrid/columns/column-types/picker-column#important-properties

 

Yana
Telerik team
 answered on 14 May 2019
1 answer
291 views

Hello all together,

another scrolling bug on RadDataGrid with DataGridTemplateColumn and DataTemplate as Header. This is a real show-stopper. The problem does not exist with DataGridTextColumn. But using DataGridTextColumn is no alternative, because it cannot be formatted, as it ignores FontFamily and so on in Header.

Issue:
If the number of columns is relatively higher than the width of the Grid, the header text in the last column will be broken and jump around when horizontal scolling left and right.

Tested on:
Samsung Galaxy Tab A, Android 8.1.0, Telerik.UI.for.Xamarin 2019.1.318.1

How to test:
Deploy solution (Visual Studio 2017) in appendix (rename .png to .zip) to Android device. Scroll left and right and watch the header of the last column. It's header text in xaml is "EEEEEEEEEEEEEEEEEE". This text won't be displayed, but "AAAAAAAAAAAA" or "BBBBBBBBBBBB" or "DDDDDDDDDDD" instead. By scrolling left and right several times the last columns header text will jump around. If you broaden the RadDataGrid from width 300 to 600 in xaml the issue is gone.

Please confirm.

 

Please, have a look here accordingly. This scolling bug is pending since a half year:

https://feedback.telerik.com/xamarin/1380407-datagrid-scrollviewer-is-not-always-visualized-when-dynamically-changing-the-itemsource-of-the-control

 

Thank you.

 

Kind regards,

Martin

Didi
Telerik team
 answered on 10 May 2019
2 answers
230 views

Any components used in iOS will result in an app crash if AppShell is used. I have an example project if it's helpful, but it's simply the Visual Studio 2019 App Shell starter project with the AboutPage's button replaced with a RadButton. I'm using Forms v3.6.

The exception appears to happen when the trial popup is attempted to be shown. The page actually loads just fine. It works fine on Android.

Here is the exception:

{System.InvalidCastException: Specified cast is not valid.<br>  at Xamarin.Forms.Platform.iOS.Platform.PageIsChildOfPlatform (Xamarin.Forms.Page page) [0x00008] in <7402bf39df944a9ebf61606e5f9c45a4>:0 <br>  at Xamarin.Forms.Platform.iOS.Platform.<.ctor>b__7_1 (Xamarin.Forms.Page sender, Xamarin.Forms.Internals.AlertArguments arguments) [0x00000] in <7402bf39df944a9ebf61606e5f9c45a4>:0 <br>  at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)<br>  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0003b] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/corlib/System.Reflection/MonoMethod.cs:305 }

And the stack trace:

  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0004f] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/corlib/System.Reflection/MonoMethod.cs:313
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/reflection/methodbase.cs:229
  at Xamarin.Forms.MessagingCenter+Subscription.InvokeCallback (System.Object sender, System.Object args) [0x00064] in D:\a\1\s\Xamarin.Forms.Core\MessagingCenter.cs:94
  at Xamarin.Forms.MessagingCenter.InnerSend (System.String message, System.Type senderType, System.Type argType, System.Object sender, System.Object args) [0x0006b] in D:\a\1\s\Xamarin.Forms.Core\MessagingCenter.cs:217
  at Xamarin.Forms.MessagingCenter.Xamarin.Forms.IMessagingCenter.Send[TSender,TArgs] (TSender sender, System.String message, TArgs args) [0x00013] in D:\a\1\s\Xamarin.Forms.Core\MessagingCenter.cs:115
  at Xamarin.Forms.MessagingCenter.Send[TSender,TArgs] (TSender sender, System.String message, TArgs args) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\MessagingCenter.cs:108
  at Xamarin.Forms.Page.DisplayAlert (System.String title, System.String message, System.String accepHeret, System.String cancel) [0x0001f] in D:\a\1\s\Xamarin.Forms.Core\Page.cs:150
  at Xamarin.Forms.Page.DisplayAlert (System.String title, System.String message, System.String cancel) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Page.cs:141
  at Telerik.XamarinForms.Common.TelerikLicense+<>c__DisplayClass6_0.<ShowLicenseMessage>b__0 () [0x00000] in <0302126de1354584b6d9ea691c6c524a>:0
  at Telerik.XamarinForms.Common.Dispatcher+<>c__DisplayClass6_0.<ProcessItemsInQueue>b__0 () [0x00036] in <0302126de1354584b6d9ea691c6c524a>:0
  at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/Foundation/NSAction.cs:152
--- End of stack trace from previous location where exception was thrown ---
 
  at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)
  at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/UIKit/UIApplication.cs:79
  at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0002c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.8.0.2/src/Xamarin.iOS/UIKit/UIApplication.cs:63
  at LivePersonAuto.iOS.Application.Main (System.String[] args) [0x00001] in /Users/bdean/code/LivePersonAuto/LivePersonAuto.iOS/Main.cs:17

 

Is there any fix or workaround for this? It's making it impossible for us to evaluate Telerik beyond our logon screen. Thank you.

 

Brad
Top achievements
Rank 1
 answered on 10 May 2019
1 answer
94 views

Hi all, 

I am using RadCalendarView and using the date selection as range and using IOnSelectedDatesChangedListener to get the selected date range. I am also using event EventAdapter.Renderer. When the user selects the date range I also want to fetch the events associated with those dates. Is there any work around to fetch the events.

 

Thanks

Yana
Telerik team
 answered on 10 May 2019
3 answers
127 views

Hi all,

This happened randomly when we tap on a chart section to go to detail, sometimes it doesn’t fire selection event and sometime when it fires it gives null reference exception.and some times when we tap on a chart selection, application is terminating even its not giving any error in Xamarin forms IOS Project

Yana
Telerik team
 answered on 08 May 2019
1 answer
316 views

Hi Team,
I am using RadCalendarView in month view mode with horizontal scroll

it currently shows previous month's last week dates and next months first week dates as well even when none of the date from that week lies in current display month as you can see in the last row of attached screenshot.

Is it possible to show only dates for current month ? If the week has any date of current display month then displaying that complete week would be ok.

Please let me know how we could achieve it.

Yana
Telerik team
 answered on 08 May 2019
1 answer
251 views

Hi,

 

The rad data grid does not yet support footers. How do I format only the last row of a column so I can display the totals in a different format?

Didi
Telerik team
 answered on 07 May 2019
3 answers
193 views

Dear Telerik team, 

I have requirement to display detail data when click on selection data in chart. Is it possible using telerik chart ?

For Example :

I have pie chart that shows Gender percentage, Male 40%, Female 60 %. I want to display detail when click on Male.

If possible, please give me example how to do it.

 

Thanks in advance

 

Yana
Telerik team
 answered on 03 May 2019
8 answers
345 views

I am trying to highlight a selected bar in telerik bar chart control.

I tried the following code but I am not able to..

 <telerikChart:RadCartesianChart.Behaviors>
          <telerikChart:ChartSelectionBehavior DataPointSelectionMode="Single" SeriesSelectionMode="None" SelectionChanged="SelectionChangedHandler" />
        </telerikChart:RadCartesianChart.Behaviors>

private void SelectionChangedHandler(object sender, EventArgs e)
        {
            var selectedPoint = (sender as ChartSelectionBehavior).SelectedPoints.FirstOrDefault();
        }

 

please help regarding this.

Divya
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 answered on 02 May 2019
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